GENERAL DESCRIPTION

The AD8229 is an ultralow noise instrumentation amplifier designed for measuring small signals in the presence of large common-mode voltages and high temperatures.

The AD8229 has been designed for high temperature operation. The process is dielectrically isolated to avoid leakage currents at high temperatures. The design architecture was chosen to compensate for the low VBE voltages at high temperatures.

FEATURES

Designed and guaranteed for 210°C operation

Low noise

1 nV/√Hz input noise

45 nV/√Hz output noise

High CMRR

126 dB CMRR (minimum), G = 100

80 dB CMRR (minimum) to 5 kHz, G = 1

Excellent ac specifications

15 MHz bandwidth (G = 1)

1.2 MHz bandwidth (G = 100)

22 V/μs slew rate

THD: −130 dBc (1 kHz, G = 1)

Versatile

±4 V to ±17 V dual supply

Gain set with single resistor (G = 1 to 1000)

Specified temperature range

−40°C to +210°C, SBDIP package

−40°C to +175°C, SOIC package

APPLICATIONS

Down-hole instrumentation

Harsh environment data acquisition

Exhaust gas measurements

Vibration analysis