OPA703
OPA70
3
OPA703
OPA7
03
OPA703
OPA2703
OPA4703
OPA704
OPA2704
OPA4704
CMOS, Rail-to-Rail, I/O
OPERATIONAL AMPLIFIERS
FEATURES
q
RAIL-TO-RAIL INPUT AND OUTPUT
q
WIDE SUPPLY RANGE:
Single Supply: 4V to 12V
Dual Supplies:
2 to
6
q
LOW QUIESCENT CURRENT: 160
A
q
FULL-SCALE CMRR: 90dB
q
LOW OFFSET: 160
V
q
HIGH SPEED:
OPA703: 1MHz, 0.6V/
s
OPA704: 3MHz, 3V/
s
q
MicroSIZE PACKAGES:
SOT23-5, MSOP-8, TSSOP-14
q
LOW INPUT BIAS CURRENT: 1pA
APPLICATIONS
q
AUTOMOTIVE APPLICATIONS:
Audio, Sensor Applications, Security Systems
q
PORTABLE EQUIPMENT
q
ACTIVE FILTERS
q
TRANSDUCER AMPLIFIER
q
TEST EQUIPMENT
q
DATA ACQUISITION
DESCRIPTION
The OPA703 and OPA704 series op amps are optimized for
applications requiring rail-to-rail input and output swing.
Single, dual, and quad versions are offered in a variety of
packages. While the quiescent current is less than 200
A per
amplifier, the OPA703 still offers excellent dynamic perfor-
mance (1MHz GBW and 0.6V/
s SR) and unity-gain stabil-
ity. The OPA704 is optimized for gains of 5 or greater and
provides 3MHz GBW and 3V/
s slew rate.
The OPA703 and OPA704 series are fully specified and
guaranteed over the supply range of
2V to
6V. Input
swing extends 300mV beyond the rail and the output swings
to within 40mV of the rail.
The single versions (OPA703 and OPA704) are available in
the MicroSIZE SOT23-5 and in the standard SO-8 surface-
mount, as well as the DIP-8 packages. Dual versions
(OPA2703 and OPA2704) are available in the MSOP-8,
SO-8, and DIP-8 packages. The quad OPA4703 and
OPA4704 are available in the TSSOP-14 and SO-14 pack-
ages. All are specified for operation from 40
C to +85
C.
1
2
3
5
4
V+
In
Out
V
+In
OPA703
OPA704
SOT23-5
1
2
3
4
8
7
6
5
NC
V+
Out
NC
NC
In
+In
V
OPA703
OPA704
SO-8, DIP-8
1
2
3
4
8
7
6
5
V+
Out B
In B
+In B
Out A
In A
+In A
V
OPA2703
OPA2704
MSOP-8, SO-8, DIP-8
A
B
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Out D
In D
+In D
V
+In C
In C
Out C
Out A
In A
+In A
V+
+In B
In B
Out B
OPA4703
OPA4704
TSSOP-14, SO-14
A
D
B
C
SBOS180A MARCH 2001
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 2001, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
OPA703, OPA704
2
SBOS180A
MINIMUM
PACKAGE
RECOMMENDED
DRAWING
PACKAGE
ORDERING
TRANSPORT
PRODUCT
DESCRIPTION
GAIN
PACKAGE
NUMBER
MARKING
NUMBER
(1)
MEDIA
OPA703NA
Single, GBW = 1MHz
1
SOT23-5
331
A03
OPA703NA/250
Tape and Reel
"
"
"
"
"
"
OPA703NA/3K
Tape and Reel
OPA703UA
Single, GBW = 1MHz
1
SO-8
182
OPA703UA
OPA703UA
Rails
"
"
"
"
"
"
OPA703UA/2K5
Tape and Reel
OPA703PA
Single, GBW = 1MHz
1
DIP-8
006
OPA703PA
OPA703PA
Rails
OPA2703EA
Dual, GBW = 1MHz
1
MSOP-8
337
B03
OPA2703EA/250
Tape and Reel
"
"
"
"
"
"
OPA2703EA/2K5
Tape and Reel
OPA2703UA
Dual, GBW = 1MHz
1
SO-8
182
OPA2703UA
OPA2703UA
Rails
"
"
"
"
"
"
OPA2703UA/2K5
Tape and Reel
OPA2703PA
Dual, GBW = 1MHz
1
DIP-8
006
OPA2703PA
OPA2703PA
Rails
OPA4703EA
Quad, GBW = 1MHz
1
TSSOP-14
357
OPA4703EA
OPA4703EA/250
Tape and Reel
"
"
"
"
"
"
OPA4703EA/2K5
Tape and Reel
OPA4703UA
Quad, GBW = 1MHz
1
SO-14
235
OPA4703UA
OPA4703UA
Rails
"
"
"
"
"
"
OPA4703UA/2K5
Tape and Reel
OPA704NA
Single, GBW = 5MHz
5
SOT23-5
331
A04
OPA704NA/250
Tape and Reel
"
"
"
"
"
"
OPA704NA/3K
Tape and Reel
OPA704UA
Single, GBW = 5MHz
5
SO-8
182
OPA704UA
OPA704UA
Tape and Reel
"
"
"
"
"
"
OPA704UA/2K5
Tape and Reel
OPA704PA
Single, GBW = 5MHz
5
DIP-8
006
OPA704PA
OPA704PA
Rails
OPA2704EA
Dual, GBW = 5MHz
5
MSOP-8
337
B04
OPA2703EA/250
Tape and Reel
"
"
"
"
"
"
OPA2703EA/2K5
Tape and Reel
OPA2704UA
Dual, GBW = 5MHz
5
SO-8
182
OPA2704UA
OPA2704UA
Rails
"
"
"
"
"
"
OPA2704UA/2K5
Tape and Reel
OPA2704PA
Dual, GBW = 5MHz
5
DIP-8
006
OPA2704PA
OPA2704PA
Rails
OPA4704EA
Quad, GBW = 5MHz
5
TSSOP-14
357
OPA4704EA
OPA4704EA/250
Tape and Reel
"
"
"
"
"
"
OPA4704EA/2K5
Tape and Reel
OPA4704UA
Quad, GBW = 5MHz
5
SO-14
235
OPA4704UA
OPA4704UA
Rails
"
"
"
"
"
"
OPA4704UA/2K5
Tape and Reel
NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /3K indicates 3000 devices per reel). Ordering 3000 pieces
of "OPA703NA/3K" will get a single 3000-piece Tape and Reel.
PACKAGE/ORDERING INFORMATION
Supply Voltage, V+ to V ................................................................. 13.2V
Signal Input Terminals, Voltage
(2)
..................... (V) 0.3V to (V+) +0.3V
Current
(2)
.................................................... 10mA
Output Short-Circuit
(3)
.............................................................. Continuous
Operating Temperature .................................................. 55
C to +125
C
Storage Temperature ..................................................... 65
C to +150
C
Junction Temperature .................................................................... +150
C
Lead Temperature (soldering, 10s) ............................................... +300
C
NOTES: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may
degrade device reliability. (2) Input terminals are diode-clamped to the power
supply rails. Input signals that can swing more than 0.3V beyond the supply
rails should be current-limited to 10mA or less. (3) Short-circuit to ground,
one amplifier per package.
ABSOLUTE MAXIMUM RATINGS
(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
OPA703, OPA704
3
SBOS180A
OPA703NA, UA, PA
OPA2703EA, UA, PA
OPA4703EA, UA
OPA703 ELECTRICAL CHARACTERISTICS: V
S
= 4V to 12V
Boldface limits apply over the specified temperature range, T
A
= 40
C to +85
C
At T
A
= +25
C, R
L
= 20k
connected to V
S
/ 2 and V
OUT
= V
S
/ 2, unless otherwise noted.
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
V
OS
V
S
=
5V, V
CM
= 0V
160
750
V
Drift
dV
OS
/ dT
T
A
= 40
C to +85
C
4
V/
C
vs Power Supply
PSRR
V
S
=
2V to
6V, V
CM
= 0V
20
100
V/V
Over Temperature
V
S
=
2V to
6V, V
CM
= 0V
200
V/V
Channel Separation, dc
R
L
= 20k
1
V/V
f = 1kHz
98
dB
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
V
CM
(V) 0.3
(V+) + 0.3
V
Common-Mode Rejection Ratio
CMRR
V
S
=
5V, (V) 0.3V < V
CM
< (V+) + 0.3V
70
90
dB
over Temperature
V
S
=
5V, (V) < V
CM
< (V+)
68
dB
V
S
=
5V, (V) 0.3V < V
CM
< (V+) 2V
80
96
dB
over Temperature
V
S
=
5V, (V) < V
CM
< (V+) 2V
74
dB
INPUT BIAS CURRENT
Input Bias Current
I
B
V
S
=
5V, V
CM
= 0V
1
10
pA
Input Offset Current
I
OS
V
S
=
5V, V
CM
= 0V
0.5
10
pA
INPUT IMPEDANCE
Differential
4 10
9
|| 4
|| pF
Common-Mode
5 10
12
|| 4
|| pF
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz
V
S
=
5V, V
CM
= 0V
6
Vp-p
Input Voltage Noise Density, f = 1kHz
e
n
V
S
=
5V, V
CM
= 0V
45
nV/
Hz
Current Noise Density, f = 1kHz
i
n
V
S
=
5V, V
CM
= 0V
2.5
fA/
Hz
OPEN-LOOP GAIN
Open-Loop Voltage Gain
A
OL
R
L
= 100k
, (V)+0.1V < V
O
< (V+)0.1V
120
dB
R
L
= 20k
, (V)+0.075V < V
O
< (V+)0.075V
100
110
dB
over Temperature
R
L
= 20k
, (V)+0.075V < V
O
< (V+)0.075V
96
dB
R
L
= 5k
, (V)+0.15V < V
O
< (V+)0.15V
100
110
dB
over Temperature
R
L
= 5k
, (V)+0.15V < V
O
< (V+)0.15V
96
dB
OUTPUT
Voltage Output Swing from Rail
R
L
= 100k
, A
OL
> 80dB
40
mV
R
L
= 20k
, A
OL
> 100dB
75
mV
over Temperature
R
L
= 20k
, A
OL
> 96dB
75
mV
R
L
= 5k
, A
OL
> 100dB
150
mV
over Temperature
R
L
= 5k
, A
OL
> 96dB
150
mV
Output Current
I
OUT
|V
S
V
OUT
| < 1V
10
mA
Short-Circuit Current
I
SC
40
mA
Capacitive Load Drive
C
LOAD
See Typical Performance Curves
FREQUENCY RESPONSE
C
L
= 100pF
Gain-Bandwidth Product
GBW
G = +1
1
MHz
Slew Rate
SR
V
S
=
5V, G = +1
0.6
V/
s
Settling Time, 0.1%
t
S
V
S
=
5V, 5V Step, G = +1
15
s
0.01%
V
S
=
5V, 5V Step, G = +1
20
s
Overload Recovery Time
V
IN
Gain = V
S
3
s
Total Harmonic Distortion + Noise
THD+N
V
S
=
5V, V
O
= 3Vp-p, G = +1, f = 1kHz
0.02
%
POWER SUPPLY
Specified Voltage Range, Single Supply
V
S
4
12
V
Specified Voltage Range, Dual Supplies
V
S
2
6
V
Operating Voltage Range
3.6 to 12
V
Quiescent Current (per amplifier)
I
Q
I
O
= 0
160
200
A
over Temperature
300
A
TEMPERATURE RANGE
Specified Range
40
85
C
Operating Range
55
125
C
Storage Range
65
150
C
Thermal Resistance
JA
SOT23-5 Surface-Mount
200
C/W
MSOP-8 Surface-Mount
150
C/W
TSSOP-14 Surface-Mount
100
C/W
SO-8 Surface Mount
150
C/W
SO-14 Surface Mount
100
C/W
DIP-8
100
C/W
OPA703, OPA704
4
SBOS180A
OPA704NA, UA, PA
OPA2704EA, UA, PA
OPA4704EA, UA
OPA704 ELECTRICAL CHARACTERISTICS: V
S
= 4V to 12V
Boldface limits apply over the specified temperature range, T
A
= 40
C to +85
C
At T
A
= +25
C, R
L
= 20k
connected to V
S
/ 2 and V
OUT
= V
S
/ 2, unless otherwise noted.
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
V
OS
V
S
=
5V, V
CM
= 0V
160
750
V
Drift
dV
OS
/dT
T
A
= 40
C to +85
C
4
V/
C
vs Power Supply
PSRR
V
S
=
2V to
6V, V
CM
= 0V
20
100
V/V
Over Temperature
V
S
=
2V to
6V, V
CM
= 0V
200
V/V
Channel Separation, dc
R
L
= 20k
1
V/V
f = 1kHz
98
dB
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
V
CM
(V) 0.3
(V+) + 0.3
V
Common-Mode Rejection Ratio
CMRR
V
S
=
5V, (V) 0.3V < V
CM
< (V+) + 0.3V
70
90
dB
over Temperature
V
S
=
5V, (V) < V
CM
< (V+)
68
dB
V
S
=
5V, (V) 0.3V < V
CM
< (V+) 2V
80
96
dB
over Temperature
V
S
=
5V, (V) < V
CM
< (V+) 2V
74
dB
INPUT BIAS CURRENT
Input Bias Current
I
B
V
S
=
5V, V
CM
= 0V
1
10
pA
Input Offset Current
I
OS
V
S
=
5V, V
CM
= 0V
0.5
10
pA
INPUT IMPEDANCE
Differential
4 10
9
|| 4
|| pF
Common-Mode
5 10
12
|| 4
|| pF
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz
V
S
=
5V, V
CM
= 0V
6
Vp-p
Input Voltage Noise Density, f = 1kHz
e
n
V
S
=
5V, V
CM
= 0V
45
nV/
Hz
Current Noise Density, f = 1kHz
i
n
V
S
=
5V, V
CM
= 0V
2.5
fA/
Hz
OPEN-LOOP GAIN
Open-Loop Voltage Gain
A
OL
R
L
= 100k
, (V)+0.1V < V
O
< (V+)0.1V
120
dB
R
L
= 20k
, (V)+0.075V < V
O
< (V+)0.075V
100
110
dB
over Temperature
R
L
= 20k
, (V)+0.075V < V
O
< (V+)0.075V
96
dB
R
L
= 5k
, (V)+0.15V < V
O
< (V+)0.15V
100
110
dB
over Temperature
R
L
= 5k
, (V)+0.15V < V
O
< (V+)0.15V
96
dB
OUTPUT
Voltage Output Swing from Rail
R
L
= 100k
, A
OL
> 80dB
40
mV
R
L
= 20k
, A
OL
> 100dB
75
mV
over Temperature
R
L
= 20k
, A
OL
> 96dB
75
mV
R
L
= 5k
, A
OL
> 100dB
150
mV
over Temperature
R
L
= 5k
, A
OL
> 96dB
150
mV
Output Current
I
OUT
|V
S
V
OUT
| < 1V
10
mA
Short-Circuit Current
I
SC
40
mA
Capacitive Load Drive
C
LOAD
See Typical Performance Curves
FREQUENCY RESPONSE
C
L
= 100pF
Gain-Bandwidth Product
GBW
G = +5
3
MHz
Slew Rate
SR
V
S
=
5V, G = +5
3
V/
s
Settling Time, 0.1%
t
S
V
S
=
5V, 5V Step, G = +5
18
s
0.01%
V
S
=
5V, 5V Step, G = +5
21
s
Overload Recovery Time
V
IN
Gain = V
S
0.6
s
Total Harmonic Distortion + Noise
THD+N
V
S
=
5V, V
O
= 3Vp-p, G = +5, f = 1kHz
0.025
%
POWER SUPPLY
Specified Voltage Range, Single Supply
V
S
4
12
V
Specified Voltage Range, Dual Supplies
V
S
2
6
V
Operating Voltage Range
3.6 to 12
V
Quiescent Current (per amplifier)
I
Q
I
O
= 0
160
200
A
over Temperature
300
A
TEMPERATURE RANGE
Specified Range
40
85
C
Operating Range
55
125
C
Storage Range
65
150
C
Thermal Resistance
JA
SOT23-5 Surface-Mount
200
C/W
MSOP-8 Surface-Mount
150
C/W
TSSOP-14 Surface-Mount
100
C/W
SO-8 Surface Mount
150
C/W
SO-14 Surface Mount
100
C/W
DIP-8
100
C/W
OPA703, OPA704
5
SBOS180A
TYPICAL CHARACTERISTICS
At T
A
= +25
C, V
S
=
5V, and R
L
= 20k
, unless otherwise noted.
OPA703 GAIN AND PHASE vs FREQUENCY
10
Gain (dB)
Frequency (Hz)
100
10k
1k
100k
1M
10M
120
100
80
60
40
20
0
20
40
60
120
100
80
60
40
20
0
20
40
60
Phase (
)
OPA704 GAIN AND PHASE vs FREQUENCY
10
Gain (dB)
Frequency (Hz)
100
10k
1k
100k
1M
10M
120
100
80
60
40
20
0
20
40
Phase (
)
120
100
80
60
40
20
0
20
40
CMRR vs FREQUENCY
1
CMRR (dB)
Frequency (Hz)
10
1k
100
10k
100k
1M
120
100
80
60
40
20
0
CMRR Full Scale
CMRR Limited Range
MAXIMUM AMPLITUDE vs FREQUENCY
100
Amplitude (V)
Frequency (Hz)
1k
10k
100k
1M
10M
7
6
5
4
3
2
1
0
(V+) (V) = 12V
OPA703
OPA704
CHANNEL SEPARATION vs FREQUENCY
10
Channel Separation (dB)
Frequency (Hz)
100
1k
10k
100k
1M
160
140
120
100
80
60
40
20
0
PSRR vs FREQUENCY
1
PSRR (dB)
Frequency (Hz)
10
1k
100
10k
100k
1M
140
120
100
80
60
40
20
0
OPA703, OPA704
6
SBOS180A
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
S
=
5V, and R
L
= 20k
, unless otherwise noted.
INPUT CURRENT AND VOLTAGE
SPECTRAL NOISE vs FREQUENCY
0.1
Input Current and Voltage
Spectral Noise nV/
Hz
Frequency (Hz)
10
1
100
1k
10k
100k
1M
10000
1000
100
10
1
0.1
Current
Noise
Voltage
Noise
Output Current Spectral
Noise fA/
Hz
10000
1000
100
10
1
0.1
OPEN-LOOP GAIN vs TEMPERATURE
100
A
OL
(dB)
Temperature (
C)
50
75
25
50
0
25
75
100 125 150 175
140
130
120
110
100
90
QUIESCENT CURRENT vs TEMPERATURE
100
I
Q
(
A)
Temperature (
C)
75 50 25
50
25
0
75
100 125 150 175
250
200
150
100
50
0
COMMON-MODE REJECTION RATIO
vs TEMPERATURE
80
CMRR (dB)
Temperature (
C)
40
60
20
20
0
40
60
80
100 120 140
120
110
100
90
80
70
60
Limited Scale
Full Scale
INPUT BIAS (I
B
) AND OFFSET (I
OS
)
CURRENT vs TEMPERATURE
50
Bias Current (pA)
Temperature (
C)
25
0
50
25
75
I
B
I
OS
100
125
175
150
100000
10000
1000
100
10
1
0.1
0.0
PSRR vs TEMPERATURE
75
PSRR (dB)
Temperature (
C)
25
50
0
50
10
25
75
100 110 130 150
120
110
100
90
80
70
60
OPA703, OPA704
7
SBOS180A
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
S
=
5V, and R
L
= 20k
, unless otherwise noted.
INPUT BIAS CURRENT (I
B
)
vs COMMON-MODE VOLTAGE (V
CM
)
TEMPERATURE =
25C
6
Input Bias Current (pA)
Common-Mode Voltage, V
CM
(V)
5
4
3
1
0
2
1
2
3
4
5
6
15
10
5
0
5
10
15
INPUT BIAS CURRENT (I
B
)
vs COMMON-MODE VOLTAGE (V
CM
)
TEMPERATURE = 125
C
6
Input Bias Current (nA)
Common-Mode Voltage, V
CM
(V)
5
4
3
1
0
2
1
2
3
4
5
6
15
10
5
0
5
10
15
QUIESCENT CURRENT vs SUPPLY VOLTAGE
2
Quiescent Current (
A)
Supply Voltage (V)
4
8
6
10
12
14
200
190
180
170
160
150
140
130
120
SHORT-CIRCUIT CURRENT
vs SUPPLY VOLTAGE
2
Short-Circuit Current (mA)
Supply Voltage (V)
4
8
6
10
12
14
60
50
40
30
20
10
0
I
SC
P (Sourcing)
I
SC
N (Sinking)
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
0
Output Voltage (V)
Output Current (
mA)
10
20
40
30
50
60
70
6
4
2
0
2
4
6
Sourcing
Sinking
+125
C +25
C
55
C
+125
C
+25
C
55
C
TOTAL HARMONIC DISTORTION PLUS NOISE
(Load = 5k
, BW = 8kHz, 1.0Vrms)
1
THD (%)
Frequency (Hz)
10
1k
100
10k
100k
1.000
0.100
0.010
0.001
G = +5
OPA704
OPA703
G = +1
OPA703, OPA704
8
SBOS180A
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
S
=
5V, and R
L
= 20k
, unless otherwise noted.
OPA703 SETTLING TIME vs GAIN
1
Settling Time (
s)
Non-Inverting Gain (V/V)
10
100
100
90
80
70
60
50
40
30
20
10
0.1%
0.01%
OPA704 SETTLING TIME vs GAIN
1
Settling Time (
s)
Non-Inverting Gain (V/V)
10
100
50
45
40
35
30
25
20
15
10
0.01%
0.10%
V
OS
PRODUCTION DISTRIBUTION
Frequency (%)
Voltage Offset (
V)
0.60
0.45
0.30
0.15
< 0.00
< 0.15
< 0.30
< 0.45
< 0.60
< 0.75
25
20
15
10
5
0
OPA703 SMALL-SIGNAL OVERSHOOT (%)
vs CAPACITIVE LOAD AND GAIN
10
Overshoot (%)
Load Capacitance Value (pF)
100
1k
10k
90
80
70
60
50
40
30
20
10
0
G = +1
G = 1
G
= +5
OPA704 SMALL-SIGNAL OVERSHOOT (%)
vs CAPACITIVE LOAD
10
Overshoot (%)
Capacitance Load (pF)
100
1k
10k
90
80
70
60
50
40
30
20
10
0
G = +5
V
OS
DRIFT PRODUCTION DISTRIBUTION
Frequency (%)
Voltage Offset (
V/
C)
30
24
18
12
6
< 0
< 6
< 12
< 18
< 24
< 30
27
21
15
9
3
< 3
< 9
< 15
< 21
< 27
> 30
25
20
15
10
5
0
OPA703, OPA704
9
SBOS180A
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
S
=
5V, and R
L
= 20k
, unless otherwise noted.
OPA703 SMALL SIGNAL STEP RESPONSE
(G = +1V/V, R
L
= 20k
, C
L
= 100pF)
5
s/div
50mV/div
OPA704 SMALL SIGNAL STEP RESPONSE
(G = +5V/V, C
F
= 3pF, R
F
= 100k
,
C
L
= 100pF, R
L
= 20k
,)
5
s/div
50mV/div
OPA703 LARGE SIGNAL STEP RESPONSE
(G = +1V/V, R
L
= 20k
, C
L
= 100pF)
10
s/div
1V/div
OPA704 LARGE SIGNAL STEP RESPONSE
(G = +5V/V, R
L
= 20k
, C
F
= 3pF, C
L
= 100pF)
2
s/div
1V/div
OPA703, OPA704
10
SBOS180A
APPLICATIONS INFORMATION
OPA703 and OPA704 series op amps can operate on 160
A
quiescent current from a single (or split) supply in the range
of 4V to 12V (
2V to
6V), making them highly versatile
and easy to use. The OPA703 is unity-gain stable and offers
1MHz bandwidth and 0.6V/
s slew rate. The OPA704 is
optimized for gains of 5 or greater with a 3MHz bandwidth
and 3V/
s slew rate.
Rail-to-rail input and output swing helps maintain dynamic
range, especially in low supply applications. Figure 1 shows
the input and output waveforms for the OPA703 in unity-
gain configuration. Operation is from a
5V supply with a
100k
load connected to V
S
/2. The input is a 10Vp-p
sinusoid. Output voltage is approximately 10Vp-p.
Power-supply pins should be bypassed with 1000pF ceramic
capacitors in parallel with 1
F tantalum capacitors.
OPERATING VOLTAGE
OPA703 and OPA704 series op amps are fully specified and
guaranteed from +4V to +12V over a temperature range of
40C to +85C. Parameters that vary significantly with
operating voltages or temperature are shown in the Typical
Performance Curves.
RAIL-TO-RAIL INPUT
The input common-mode voltage range of the OPA703 series
extends 300mV beyond the supply rails at room temperature.
This is achieved with a complementary input stage--an N-
channel input differential pair in parallel with a P-channel
differential pair, as shown in Figure 2. The N-channel pair is
active for input voltages close to the positive rail, typically
(V+) 2.0V to 300mV above the positive supply, while the P-
channel pair is on for inputs from 300mV below the negative
supply to approximately (V+) 1.5V. There is a small
transition region, typically (V+) 2.0V to (V+) 1.5V, in
which both pairs are on. This 500mV transition region can
vary
100mV with process variation. Thus, the transition
region (both stages on) can range from (V+) 2.1V to (V+)
1.4V on the low end, up to (V+) 1.9V to (V+) 1.6V on
the high end. Within the 500mV transition region PSRR,
CMRR, offset voltage, and offset drift, and THD may vary
compared to operation outside this region.
FIGURE 2. Simplified Schematic.
FIGURE 1. Rail-to-Rail Input and Output.
Input
Output (inverted on scope)
2.0V/div
G = +1, V
S
=
5V
200
s/div
V
O
V
V+
V
IN
+
V
IN
OPA703, OPA704
11
SBOS180A
CAPACITIVE LOAD AND STABILITY
The OPA703 and OPA704 series op amps can drive up to
1000pF pure capacitive load. Increasing the gain enhances
the amplifier's ability to drive greater capacitive loads (see
the typical performance curve "Small Signal Overshoot vs
Capacitive Load").
One method of improving capacitive load drive in the unity-
gain configuration is to insert a 10
to 20
resistor inside
the feedback loop, as shown in Figure 5. This reduces
ringing with large capacitive loads while maintaining DC
accuracy.
FIGURE 5. Series Resistor in Unity-Gain Buffer Configura-
tion Improves Capacitive Load Drive.
INPUT VOLTAGE
Device inputs are protected by ESD diodes that will conduct
if the input voltages exceed the power supplies by more than
approximately 300mV. Momentary voltages greater than
300mV beyond the power supply can be tolerated if the
current is limited to 10mA. This is easily accomplished with
an input resistor, as shown in Figure 3. Many input signals
are inherently current-limited to less than 10mA; therefore,
a limiting resistor is not always required. The OPA703
features no phase inversion when the inputs extend beyond
supplies if the input current is limited, as seen in Figure 4.
FIGURE 4. OPA703--No Phase Inversion with Inputs
Greater than the Power-Supply Voltage.
FIGURE 3. Input Current Protection for Voltages Exceeding
the Supply Voltage.
2.0V/div
V
S
=
5.0V, V
IN
= 11Vp-p
20
s/div
RAIL-TO-RAIL OUTPUT
A class AB output stage with common-source transistors is
used to achieve rail-to-rail output. This output stage is
capable of driving 1k
loads connected to any point be-
tween V+ and ground. For light resistive loads (> 100k
),
the output voltage can swing to 40mV from the supply rail.
With moderate resistive loads (20k
), the output can swing
to within 75mV from the supply rails while maintaining high
open-loop gain (see the typical performance curve "Output
Voltage Swing vs Output Current").
APPLICATION CIRCUITS
Figure 6 shows a G = 5 non-inverting amplifier implemented
with the OPA703 and OPA704 op amps. It demonstrates the
increased speed characteristics (bandwidth, slew rate and
settling time) that can be achieved with the OPA704 family
when used in gains of five or greater. Some optimization of
feedback capacitor value may be required to achieve best
dynamic response. Circuits with closed-loop gains of less
than five should use the OPA703 family for good stability
and capacitive load drive. The OPA703 can be used in gains
greater than five, but will not provide the increased speed
benefits of the OPA704 family.
The OPA703 series op amps are optimized for driving
medium-speed sampling data converters. The OPA703 op
amps buffer the converter's input capacitance and resulting
charge injection while providing signal gain.
Figure 7 shows the OPA2703 in a dual-supply buffered
reference configuration for the DAC7644. The DAC7644 is
a 16-bit, low-power, quad-voltage output converter. Small
size makes the combination ideal for automatic test equip-
ment, data acquisition systems, and other low-power space-
limited applications.
R
OPA703
10mA max
+V
V
V
IN
V
OUT
I
OVERLOAD
R
S
20
OPA703
C
L
R
L
V
IN
V
OUT
OPA703, OPA704
12
SBOS180A
FIGURE 7. OPA703 as Dual Supply Configuration-Buffered References for the DAC7644.
NC
NC
NC
NC
V
OUT
A Sense
V
OUT
A
V
REF
L AB Sense
V
REF
L AB
V
REF
H AB
V
REF
H AB Sense
V
OUT
B Sense
V
OUT
B
48
47
46
45
44
43
42
41
40
39
38
37
DAC7644
500pF
+V
1/2
OPA2703
1/2
OPA2703
500pF
V
V
OUT
V
OUT
Ref
+2.5V
V+
Ref
2.5V
Negative
Reference
Positive
Reference
V
FIGURE 6. OPA704 Provides higher Speed in G
5.
5k
20k
OPA704
G = 5
V
IN
Demonstrates speed improvement that
can be achieved with OPA704 family
in applications with G
5.
3pF
5k
20k
OPA703
G = 5
V
IN
LARGE-SIGNAL RESPONSE
2V/div
5
s/div
OPA703
OPA704
PACKAGING INFORMATION
ORDERABLE DEVICE
STATUS(1)
PACKAGE TYPE
PACKAGE DRAWING
PINS
PACKAGE QTY
OPA2703EA/250
ACTIVE
VSSOP
DGK
8
250
OPA2703EA/2K5
ACTIVE
VSSOP
DGK
8
2500
OPA2703PA
ACTIVE
PDIP
P
8
50
OPA2703UA
ACTIVE
SOIC
D
8
100
OPA2703UA/2K5
ACTIVE
SOIC
D
8
2500
OPA2704EA/250
ACTIVE
VSSOP
DGK
8
250
OPA2704EA/2K5
ACTIVE
VSSOP
DGK
8
2500
OPA2704PA
ACTIVE
PDIP
P
8
50
OPA2704UA
ACTIVE
SOIC
D
8
100
OPA2704UA/2K5
ACTIVE
SOIC
D
8
2500
OPA4703EA/250
ACTIVE
TSSOP
PW
14
250
OPA4703EA/2K5
ACTIVE
TSSOP
PW
14
2500
OPA4703UA
ACTIVE
SOIC
D
14
58
OPA4703UA/2K5
ACTIVE
SOIC
D
14
2500
OPA4704EA/250
ACTIVE
TSSOP
PW
14
250
OPA4704EA/2K5
ACTIVE
TSSOP
PW
14
2500
OPA4704UA
ACTIVE
SOIC
D
14
58
OPA4704UA/2K5
ACTIVE
SOIC
D
14
2500
OPA703NA/250
ACTIVE
SOP
DBV
5
250
OPA703NA/3K
ACTIVE
SOP
DBV
5
3000
OPA703PA
ACTIVE
PDIP
P
8
50
OPA703UA
ACTIVE
SOIC
D
8
100
OPA703UA/2K5
ACTIVE
SOIC
D
8
2500
OPA704NA/250
ACTIVE
SOP
DBV
5
250
OPA704NA/3K
ACTIVE
SOP
DBV
5
3000
OPA704PA
ACTIVE
PDIP
P
8
50
OPA704UA
ACTIVE
SOIC
D
8
100
OPA704UA/2K5
ACTIVE
SOIC
D
8
2500
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
PACKAGE OPTION ADDENDUM
www.ti.com
11-Nov-2003
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