PJ358
Dual Differential Input Operational Amplifiers
1-7
2002.rev.A
tilizing the circuit designs perfected for recently
introduced Quad Operational Amplifiers, these dual
operational amplifiers feature 1) low power drain 2) a
common mode input voltage range extending to ground/V
EE,
3) Single Supply or Split Supply operation and 4) pin outs
compatible with the popular MC1558 dual operational
amplifier. The PJ358 Series is equivalent to one half of an
PJ324.
These amplifiers have several distinct advantages over
standard operational amplifier types in single supply
applications . They can operate at supply voltages as low as
3.0 Volts or as high as 32 Volts with quiescent currents about
one fifth of those associated with the LM741 (on a pet
amplifier basis). The common mode input range includes the
negative supply, thereby eliminating the necessity for external
biasing components in many applications.
The output voltage range also includes the negative
power supply voltage.
Short circuit protected outputs
True differential input stage
Single supply operation : 3.0 V to 32 Volts
Low input bias currents
Internally compensated
Common mode range extends to negative supply
Single and split supply operation
Similar performance to the popular MC1558
NOTE :1. Split Power Supplies.
2. For supply. Voltages less than 32V for the PJ358 the absolute maximum input voltage is equal to the supply voltage.
3. This input curent will only exist when the voltage is negative at any of the input teads. Normal output states will
retablish when the input voltage returns to a voltage greater than -0.3V.
U
Device Operating
Temperature Package
PJ358CS SOP-8
PJ358CD
-20 to +85
DIP-8
Rating Symbol
PJ358
Unit
Power Supply Voltage Single Supply
Split Supplies
V
CC
V
CC
, V
EE
32
16
Vdc
Input Differential Voltage Range (1)
V
IDR
32 Vdc
Input Common Mode Voltage Range (2)
V
ICR
-0.3 to 32
Vdc
Input forward current (3) (VI --0.3V)
I
IF
50
mA
Output Short Circuit Duration
t
S
Continuous
Junction Temperature Plastic Packages
T
J
150
Storage Temperature Range Plastic Packages
T
stg
-55 to +125
FEATURES
DIP-8
SOP-8
Pin : 1. Output A 5. Input B
2. Input A 6. Input B
3. Input A 7. Output B
4. V
EE
/ Gnd 8. V
CC
ORDERING INFORMATION
MAXIMUM RATINGS ( T
A
= +25
, unless otherwise
noted.)
PJ358
Dual Differential Input Operational Amplifiers
2-7
2002.rev.A
Characteristics
Symbol
Min
Typ
Max
Unit
Input Offset Voltage
V
CC
= 5.0V to 30V
V
IC
=0V to Vcc -1.7 V, Vo =1.4V, R
S
=0
T
A
=25
T
A
=85
to -20
V
IO
--
--
2.0
--
5.0
7.0
mV
Average Temperature Coefficient of Input Offset Voltage
T
A
=85
to -20
I
IO
/
T -- 7.0 -- uV/
Input Offset Current
T
A
=85
to -20
I
IO
--
--
5.0
--
50
150
nA
Average Temperature Coefficient of input Offset Current
T
A
=85
to -20
I
IO
/
T --
10
--
pA/
Input Bias Current
T
A
=85 t
o -20
I
IB
--
45
50
-250
-500
A
Input Common-Mode Voltage Range (Note1)
V
CC
= 30 V
V
CC
= 30 V , (T
A
=85 to -10
)
V
ICR
0
0
--
--
28.3
28
V
Differental Input Voltage Range
V
IDR
-- -- V
CC
V
Large Signal Open-Loop Voltage Gain
R
L
= 2.0K , V
CC
=15V, For Large V
O
Swing,
T
A
=85
to -20
A
VOL
25
15
100
--
--
--
V/mV
Channel Separation
1.0 Khz to 20khz, Input Reterenced
-- --
-120 -- dB
Common Mode Rejection Ratio
R
S
10 k
CMRR 65 70
--
dB
Power Supply Rejection Ratio
PSRR
65
100
--
dB
Output Voltage RangeRL = 2K
V
OR
0 -- 3.3 V
Output Voltage -- High Limit , (T
A
=70
to 0
)
V
CC
= 30 V, R
L
= 2 k
V
CC
= 30 V, R
L
= 10 k
V
OH
26
27
--
28
--
--
V
Output Voltage -- Low Limit , (T
A
=70
to 0
)
V
CC
= 5.0 V, R
L
= 10 k
V
OL
-- 5.0 20 mV
Output Source Current V
ID
=+1.0V,V
CC
=15V I
O+
20 40 -- mA
Output Sink Current
V
ID
= -1.0 V, V
CC
= 15 V
V
ID
= -1.0 V, V
O
= 200 mV
I
O-
10
12
20
50
--
--
mA
A
Output Short Circuit to Ground (Note 2)
I
os
-- 40 60 mA
Power Supply Current , (T
A
=-20
to 85
)
V
CC
= 30 VV
O
= 0 V, R
L
=
V
CC
= 5.0 V, V
O
= 0 V, R
L
=
I
CC
--
--
1.5
0.7
3.0
1.2
mA
Notes :
1. The input common mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3 V. The
upper end of the common mode voltage range is Vcc 17 V , but either or both inputs can go to +32 V .
2. Short circuits from the output to Vcc can cause excessive heating and eventual destruction. Destructive dissipation can resuit
from simultaneous shorts on all amplifiers.
ELECTRICAL CHARACTERISTICS
(T
A
=25, Vcc = 5V unless otherwlse noted).
PJ358
Dual Differential Input Operational Amplifiers
3-7
2002.rev.A
REPRESENTATIVE CIRCUIT SCHEMATIC
CIRCUIT DESCRIPTION
The PJ358 series made using two internally compensated,two-stage operational amplifiers. The first stage of each
consists of differential input devices Q20 and Q18 with input buffer transistors Q21 and Q17 and differential to single ended
converter Q3 and Q4. The first stage performs not onl the first stage gain function but also performs the level shifting and
transconductance reduction functions. By reducing the transconductance, a smaller compensation capacitor (only 5.0pF) can be
empllyed, thussaving chip area. The transconductance reduction is accomplished by splitting the collectors of Q20 and
Q18.Another feature of this input stage is that the input common mode range can include the negative supply or ground, in single
supply operation, without saturating either the input devices or the differential to single-ended converter. The second stage
consists of a standard current source load amplifier stage.
Each amplifier is biased from an internal-voltage regulator which has a low temperature coefficient thus giving each amplifier
good temperature chatacteristics as well as excellent power supply rejection.
PJ358
Dual Differential Input Operational Amplifiers
4-7
2002.rev.A
PJ358
Dual Differential Input Operational Amplifiers
5-7
2002.rev.A
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