1.8 V to 5 V Auto-Zero, In-Amp
with Shutdown
AD8553
Rev. A
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FEATURES
Low offset voltage: 20 μV max
Low input offset drift: 0.1 μV/°C max
High CMR: 120 dB min @ G = 100
Low noise: 0.7 μV p-p from 0.01 Hz to 10 Hz
Wide gain range: 0.1 to 10,000
Single-supply operation: 1.8 V to 5.5 V
Rail-to-rail output
Shutdown capability
APPLICATIONS
Strain gauge
Weigh scales
Pressure sensors
Laser diode control loops
Portable medical instruments
Thermocouple amplifiers
PIN CONFIGURATION
RGA
1
VINP
2
VCC
3
VO
4
VFB
5
RGB
10
VINN
9
GND
8
V
REF
7
ENABLE
6
AD8553
TOP VIEW
(Not to Scale)
05474-001
Figure 1. 10-Lead MSOP
GENERAL DESCRIPTION
The AD8553 is a precision instrumentation amplifier featuring
lo
w noise, rail-to-rail output and a power-saving shutdown
mode. The AD8553 also features low offset voltage and drift
coupled with high common-mode rejection. In shutdown
mode, the total supply current is reduced to less than 4 µA.
The AD8553 is capable of operating from 1.8 V to 5.5 V.
With a low offset voltage of 20 µV, an offset voltage drift of
0.1 µV/°C, and a voltage noise of only 0.7 µV p-p (0.01 Hz to
10 Hz), the AD8553 is ideal for applications where error sources
cannot be tolerated. Precision instrumentation, position and
pressure sensors, medical instrumentation, and strain gauge
amplifiers benefit from the low noise, low input bias current,
and high common-mode rejection. The small footprint and low
cost are ideal for high volume applications.
The small package and low power consumption allow
maximum channel density and minimum board size for
space-critical equipment and portable systems.
The AD8553 is specified over the industrial temperature range
from −40°C to +85°C. The AD8553 is available in a Pb-free,
10-lead MSOP.
