1
LTC1451
LTC1452/LTC1453
12-Bit Rail-to-Rail
Micropower DACs in SO-8
Daisy-Chained Control Outputs
D
IN
CLK
CS/LD
D
OUT
D
IN
CLK
CS/LD
D
OUT
P
0.1
F
CONTROL
OUTPUT 1
CONTROL
OUTPUT 2
V
CC
V
CC
V
OUT
V
OUT
GND
GND
LTC1451
LTC1451
V
REF
V
REF
TO NEXT DAC
0.1
F
5V
1451/2/3 TA01
Differential Nonlinearity
vs Input Code
CODE
0
DNL ERROR (LSB)
0.5
0.0
0.5
1024
2048 2560
1451/2/3 TA02
512
1536
3072 3584 4095
s
Digital Calibration
s
Industrial Process Control
s
Automatic Test Equipment
s
Cellular Telephones
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
12-Bit Resolution
s
Buffered True Rail-to-Rail Voltage Output
s
3V Operation (LTC1453), I
CC
: 250
A Typ
s
5V Operation (LTC1451), I
CC
: 400
A Typ
s
3V to 5V Operation (LTC1452), I
CC
: 225
A Typ
s
Built-In Reference: 2.048V (LTC1451)
1.220V (LTC1453)
s
Multiplying Version (LTC1452)
s
Power-On Reset
s
SO-8 Package
s
3-Wire Cascadable Serial Interface
s
Maximum DNL Error: 0.5LSB
s
Schmitt Trigger on Clock Input Allows Direct
Optocoupler Interface
The LTC
1451/LTC1452/LTC1453 are complete single
supply, rail-to-rail voltage output 12-bit digital-to-analog
converters (DACs) in an SO-8 package. They include an
output buffer amplifier and an easy-to-use 3-wire
cascadable serial interface.
The LTC1451 has an onboard reference of 2.048V and a
full-scale output of 4.095V. It operates from a single 4.5V
to 5.5V supply.
The LTC1452 is a multiplying DAC with a full-scale output
of twice the reference input voltage. It operates from a
single supply of 2.7V to 5.5V.
The LTC1453 has an onboard 1.22V reference and a full-
scale output of 2.5V. It operates from a single supply of
2.7V to 5.5V.
The low power supply current makes the LTC1451 family
ideal for battery-powered applications. The space saving
8-pin SO package and operation with no external compo-
nents provide the smallest 12-bit DAC system available.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
2
LTC1451
LTC1452/LTC1453
ELECTRICAL CHARACTERISTICS
ORDER PART NUMBER
S8 PART MARKING
LTC1451CS8
LTC1452CS8
LTC1453CS8
LTC1451IS8
LTC1452IS8
LTC1453IS8
1451
1452
1453
1451I
1452I
1453I
LTC1451CN8
LTC1452CN8
LTC1453CN8
LTC1451IN8
LTC1452IN8
LTC1453IN8
Consult factory for Military grade parts.
V
CC
to GND .............................................. 0.5V to 7.5V
TTL Input Voltage .................................... 0.5V to 7.5V
V
OUT
, D
OUT
.................................... 0.5V to V
CC
+ 0.5V
REF ................................................ 0.5V to V
CC
+ 0.5V
Maximum Junction Temperature ......... 65
C to 125
C
Operating Temperature Range
Commercial ........................................... 0
C to 70
C
Industrial ......................................... 40
C to 85
C
Storage Temperature Range ................ 65
C to 150
C
Lead Temperature (Soldering, 10 sec)................. 300
C
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
C. V
CC
= 4.5V to 5.5V (LTC1451), 2.7V to 5.5V (LTC1452/LTC1453),
internal or external reference (V
REF
V
CC
/2), V
OUT
and REF unloaded, unless otherwise noted.
T
JMAX
= 125
C,
JA
= 100
C/W (N8)
T
JMAX
= 125
C,
JA
= 150
C/W (S8)
1
2
3
4
8
7
6
5
TOP VIEW
CLK
D
IN
CS/LD
D
OUT
V
CC
V
OUT
REF
GND
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
(Note 1)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DAC
Resolution
q
12
Bits
DNL
Differential Nonlinearity
Guaranteed Monotonic (Note 2)
q
0.5
LSB
INL
Integral Nonlinearity
T
A
= 25
C
3.5
LSB
(Note 2)
q
4
LSB
V
OS
Offset Error
T
A
= 25
C
12
mV
q
18
mV
V
OS
TC
Offset Error Temperature
15
V/
C
Coefficient
V
FS
Full-Scale Voltage
When Using Internal Reference, LTC1451, T
A
= 25
C
4.065
4.095
4.125
V
LTC1451
q
4.045
4.095
4.145
V
External 2.048V Reference, V
CC
= 5V, LTC1452
q
4.075
4.095
4.115
V
When Using Internal Reference, LTC1453, T
A
= 25
C
2.470
2.500
2.530
V
LTC1453
q
2.460
2.500
2.540
V
V
FS
TC
Full-Scale Voltage
When Using Internal Reference, LTC1451
0.10
LSB/
C
Temperature Coefficient
When Using External 2.048V Reference, LTC1452
0.02
LSB/
C
When Using Internal Reference, LTC1453
0.10
LSB/
C
ABSOLUTE AXI U RATI GS
W
W
W
U
PACKAGE/ORDER I FOR ATIO
U
U
W
3
LTC1451
LTC1452/LTC1453
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
C. V
CC
= 4.5V to 5.5V (LTC1451), 2.7V to 5.5V (LTC1452/LTC1453),
internal or external reference (V
REF
V
CC
/2), V
OUT
and REF unloaded, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference (LTC1451/LTC1453)
Reference Output Voltage
LTC1451
q
2.008
2.048
2.088
V
LTC1453
q
1.195
1.220
1.245
V
Reference Output
0.08
LSB/
C
Temperature Coefficient
Reference Line Regulation
q
0.7
2
LSB/V
Reference Load Regulation
0
I
OUT
100
A, LTC1451
q
0.2
1.5
LSB
LTC1453
q
0.6
3
LSB
Reference Input Range
V
REF
V
CC
1.5V
q
V
CC
/2
V
Reference Input Resistance
q
8
14
30
k
Reference Input Capacitance
15
pF
Short-Circuit Current
REF Shorted to GND
q
80
mA
Power Supply
V
CC
Positive Supply Voltage
For Specified Performance, LTC1451
q
4.5
5.5
V
LTC1452
q
2.7
5.5
V
LTC1453
q
2.7
5.5
V
I
CC
Supply Current
4.5V
V
CC
5.5V (Note 4), LTC1451
q
300
400
620
A
2.7V
V
CC
5.5V (Note 4), LTC1452
q
120
225
350
A
2.7V
V
CC
5.5V (Note 4), LTC1453
q
150
250
500
A
Op Amp DC Performance
Short-Circuit Current Low
V
OUT
Shorted to GND
q
100
mA
Short-Circuit Current High
V
OUT
Shorted to V
CC
q
120
mA
Output Impedance to GND
Input Code = 0
q
40
120
AC Performance
Voltage Output Slew Rate
(Note 3)
q
0.4
1.0
V/
s
Voltage Output Settling Time
(Notes 3, 4) to
0.5LSB
14
s
Digital Feedthrough
0.3
nV s
AC Feedthrough
REF = 1kHz, 2V
P-P
, LTC1452
95
dB
SINAD
Signal-to-Noise + Distortion
REF = 1kHz, 2V
P-P
, (Code: All 1s) LTC1452
85
dB
ELECTRICAL CHARACTERISTICS
4
LTC1451
LTC1452/LTC1453
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
C. V
CC
= 5V (LTC1451LTC1452), V
CC
= 3V (LTC1453).
LOAD CURRENT (mA)
0.0001
MINIMUM SUPPLY VOLTAGE (V)
1
10
5.4
5.2
5.0
4.8
4.6
4.4
4.2
4.0
1451/2/3 G01
0.01
0.001
0.1
100
V
OUT
< 1LSB
TEMPERATURE (
C)
55
SUPPLY CURRENT (
A)
25
5
35
65
1451/2/3 G03
95
450
440
430
420
410
400
390
380
370
360
350
125
V
CC
= 5.5V
V
CC
= 4.5V
V
CC
= 5V
LOAD CURRENT (mA)
0.0001
MINIMUM SUPPLY VOLTAGE (V)
1
10
4.50
4.25
4.00
3.75
3.50
3.25
3.00
2.75
2.50
2.25
1451/2/3 G02
0.01
0.001
0.1
100
V
OUT
< 1LSB
LTC1451
Supply Current vs Temperature
LTC1451 Minimum Supply
Voltage vs Load Current
LTC1453 Minimum Supply
Voltage vs Load Current
Note 3: Load is 5k
in parallel with 100pF.
Note 4: DAC switched between all 1s and the code corresponding to V
OS
for the part, i.e., LTC1451: code 18; LTC1453: code 30.
Note 5: Digital inputs at 0V or V
CC
.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Nonlinearity is defined from the first code that is greater than or
equal to the maximum offset specification to code 4095 (full scale).
LTC1451/LTC1452
LTC1453
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Digital I/O
V
IH
Digital Input High Voltage
q
2.4
2.0
V
V
IL
Digital Input Low Voltage
q
0.8
0.6
V
V
OH
Digital Output High Voltage
I
OUT
= 1mA
q
V
CC
1.0
V
CC
0.7
V
V
OL
Digital Output Low Voltage
I
OUT
= 1mA
q
0.4
0.4
V
I
LEAK
Digital Input Leakage
V
IN
= GND to V
CC
q
10
10
A
C
IN
Digital Input Capacitance
Guaranteed by Design
q
10
10
pF
Not Subject to Test
Switching
t
1
D
IN
Valid to CLK Setup
q
40
60
ns
t
2
D
IN
Valid to CLK Hold
q
0
0
ns
t
3
CLK High Time
q
40
60
ns
t
4
CLK Low Time
q
40
60
ns
t
5
CS/LD Pulse Width
q
50
80
ns
t
6
LSB CLK to CS/LD
q
40
60
ns
t
7
CS/LD Low to CLK
q
20
30
ns
t
8
D
OUT
Output Delay
C
LOAD
= 15pF
q
150
220
ns
t
9
CLK Low to CS/LD Low
q
20
30
ns
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
U
W
5
LTC1451
LTC1452/LTC1453
LOAD RESISTANCE (
)
10
OUTPUT SWING (V)
100
1k
10k
1451/2/3 G05
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
FULL SCALE
R
L
TIED TO GND
ZERO SCALE
R
L
TIED TO V
CC
V
CC
= 5V
OUTPUT SINK CURRENT (mA)
OUTPUT PULL-DOWN VOLTAGE (mV)
1000
100
10
1
0.1
0.0001
0.1
1
10
100
1451/2/3 G06
0.001
0.01
125
C
55
C
25
C
LOGIC INPUT VOLTAGE (V)
0
SUPPLY CURRENT (mA)
1.15
1.05
0.95
0.85
0.75
0.65
0.55
0.45
0.35
4.0
1451/2/3 G04
1.0 1.5
2.5
3.5
4.5
0.5
2.0
3.0
5.0
ALL DIGITAL INPUTS
TIED TOGETHER
LTC1451
Supply Current vs Logic Input
Voltage
LTC1451
Output Swing vs Load Resistance
LTC1451
Pull-Down Voltage vs Output Sink
Current Capability
TEMPERATURE (
C)
55
OFFSET VOLTAGE (
V)
25
5
35
65
1451/2/3 G07
95
900
800
700
600
500
400
300
125
CODE
0
DNL ERROR (LSB)
0.5
0.0
0.5
1024
2048 2560
1451/2/3 TA02
512
1536
3072 3584 4095
LTC1451
Differential Nonlinearity (DNL)
CODE
0
ERROR (LSB)
2.0
1.6
1.2
0.8
0.4
0
0.4
0.8
1.2
1.6
2.0
1024
2048 2560
1451/2/3 G09
512
1536
3072 3584 4095
V
CC
= 5V
INTERNAL REFERENCE
T
A
= 25
C
LTC1451
Integral Nonlinearity (INL)
0.2LSB/DIV
LTC1452
Total Harmonic Distortion + Noise
vs Frequency
LTC1451
Broadband Output Noise
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION + NOISE (dB)
40
50
60
70
80
90
100
100
50
10k
100k
1451/2/3 G08
1k
V
CC
= 5V
V
IN
= 2V
P-P
V
OUT
= 4V
P-P
LTC1451
Offset Voltage vs Temperature
5ms/DIV
CODE = FFFH
BW = 3Hz TO 1.4MHz
GAIN = 1000
1451/2/3 G10
TYPICAL PERFOR A CE CHARACTERISTICS
U
W
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