a
FEATURES
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
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 DESCRIPTION
Quad Low-Offset, Low-Power
Operational Amplifier
OP400
PIN CONNECTIONS
14-PIN HERMETIC DIP
(Y-Suffix)
16-PIN SOL
(S-Suffix)
14-PIN PLASTIC DIP
(P-Suffix)
The 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.
The 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. The OP400 conforms to the industry-standard quad
pinout which does not have null terminals.
The OP400 features low power consumption, drawing less than
725
mA
per amplifier. The 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.
Voltage noise density of the OP400 is a low 11 nV/
÷
Hz
at 10 Hz,
which is half that of most competitive devices.
The OP400 is pin-compatible with the LM148, HA4741,
RM4156, and LT1014 operational amplifiers and can be used
to upgrade systems using these devices. The 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. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
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