OP400 Datasheet, PDF (8/12 Pages) Analog Devices – Quad Low-Offset, Low-Power Operational Amplifier

OP400
Table I. Gain Bandwidth
Gain
5
10
100
1000
Bandwidth
150 kHz
67 kHz
7.5 kHz
500 Hz
The output signal is specified with respect to the reference
input, which is normally connected to analog ground. The refer-
ence input can be used to offset the output from –10 V to +10 V
if required.
Figure 3. Burn-In Circuit
APPLICATIONS INFORMATION
The OP400 is inherently stable at all gains and is capable of
driving large capacitive loads without oscillating. Nonetheless,
good supply decoupling is highly recommended. Proper supply
decoupling reduces problems caused by supply line noise and
improves the capacitive load driving capability of the OP400.
Total supply current can be reduced by connecting the inputs of
an unused amplifier to –V. This turns the amplifier off, lowering
the total supply current.
APPLICATIONS
Dual Low-Power Instrumentation Amplifier
A dual instrumentation amplifier that consumes less than 33 mW
of power per channel is shown in Figure 1. The linearity of the
instrumentation amplifier exceeds 16 bits in gains of 5 to 200
and is better than 14 bits in gains from 200 to 1000. CMRR is
above 115 dB (G = 1000). Offset voltage drift is typically 0.4
mV/∞C over the military temperature range which is comparable
to the best monolithic instrumentation amplifiers. The band-
width of the low-power instrumentation amplifier is a function
of gain and is shown in Table I.
Figure 4. Dual Low-Power Instrumentation Amplifier
–8–
REV. A