Quad Low-Offset, Low-Power
Operational Amplifier
a
OP400
FEATURES
P IN CO NNECTIO NS
Low Input Offset Voltage 150 V Max
Low Offset Voltage Drift, Over –55؇C to +125؇C
1.2 pV/؇C Max
Low Supply Current (Per Amplifier) 725 A Max
High Open-Loop Gain 5000 V/mV Min
Input Bias Current 3 nA Max
14-P IN H ERMETIC D IP
(Y-Suffix)
16-P IN SO L
(S-Suffix)
14-P IN P LASTIC D IP
(P-Suffix)
Low Noise Voltage Density 11 nV/÷Hz at 1 kHz
Stable With Large Capacitive Loads 10 nF Typ
Pin Compatible to LM148, HA4741, RM4156, and LT1014
with Improved Performance
Available in Die Form
GENERAL D ESCRIP TIO N
T he OP400 is the first monolithic quad operational amplifier
that features OP77 type performance. Precision performance no
longer has to be sacrificed to obtain the space and cost savings
offered by quad amplifiers.
T he OP400 features low power consumption, drawing less than
725 mA per amplifier. T he total current drawn by this quad
amplifier is less than that of a single OP07, yet the OP400 offers
significant improvements over this industry standard op amp.
T he OP400 features an extremely low input offset voltage of
less than 150 mV with a drift of under 1.2 mV/∞C, guaranteed
over the full military temperature range. Open-loop gain of the
OP400 is over 5,000,000 into a 10 kW load, input bias current is
under 3 nA, CMR is above 120 dB, and PSRR is below 1.8 mV/V.
On-chip zener-zap trimming is used to achieve the low input
offset voltage of the OP400 and eliminates the need for offset
nulling. T he OP400 conforms to the industry-standard quad
pinout which does not have null terminals.
Voltage noise density of the OP400 is a low 11 nV/
which is half that of most competitive devices.
÷Hz at 10 Hz,
T he OP400 is pin-compatible with the LM148, H A4741,
RM4156, and LT 1014 operational amplifiers and can be used
to upgrade systems using these devices. T he OP400 is an ideal
choice for applications requiring multiple precision operational
amplifiers and where low power consumption is critical.
Figure 1. Simplified Schematic (One of Four Amplifiers is Shown)
REV. B
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