Datasheet AD8229-KGD (Analog Devices)

1 nV/√Hz Low Noise 210°C Instrumentation Amplifier Known Good Die AD8229-KGD FEATURES FUNCTIONAL BLOCK DIAGRAM Designed for 210°C operation Low noise –IN +VS 1 nV/√Hz input noise R V 45 nV/√Hz output noise G OUT High CMRR RG REF 126 dB CMRR (minimum), G = 100 +IN –VS
003
80 dB CMRR (minimum) to 5 kHz, G = 1 AD8229-KGD Excellent ac specifications
10107-
15 MHz bandwidth (G = 1)
Figure 1.
1.2 MHz bandwidth (G = 100) 22 V/µs slew rate THD: 130 dB (1 kHz, G = 1) Versatile ±4 V to ±17 V dual supply Gain set with single resistor (G = 1 to 1000) Temperature range: −40°C to +210°C Known good die (KGD): these die are fully guaranteed to data sheet specifications APPLICATIONS Down-hole instrumentation Harsh environment data acquisition Exhaust gas measurements Vibration analysis GENERAL DESCRIPTION
Gain is set from 1 to 1000 with a single resistor. A reference pin The AD8229-KGD is an ultralow noise instrumentation amplifier al ows the user to offset the output voltage. This feature is useful designed for measuring small signals in the presence of large when interfacing with analog-to-digital converters. common-mode voltages and high temperatures. Additional application and technical information can be found The AD8229-KGD has been designed for high temperature oper- in the AD8229 standard product data sheet. ation. The process is dielectrically isolated to avoid leakage currents at high temperatures. The design architecture was chosen
100
to compensate for the low V
80
BE voltages at high temperatures.
60
The AD8229-KGD excels at distinguishing tiny signals. It delivers industry leading 1 nV/√Hz input noise performance. The high
40
CMRR of the AD8229-KGD prevents unwanted signals from
20 V) µ
corrupting the acquisition. The CMRR increases as the gain
( 0 SI O
increases, offering high rejection when it is most needed.
V –20
The AD8229-KGD is one of the fastest instrumentation amplifiers
–40
available. Its current feedback architecture provides bandwidth
–60
that is quite high, even at high gains, for example, 1.2 MHz at
–80
G = 100. With the high bandwidth comes excel ent distortion
–100 –55 –35 –15 5 25 45 65 85 105 125 145 165 185 205 225
performance, allowing use in demanding applications such as 016
TEMPERATURE (°C)
vibration analysis. 09412- Figure 2. Typical Input Offset vs. Temperature (G = 100)
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Document Outline Features Applications General Description Functional Block Diagram Revision History Specifications Absolute Maximum Ratings ESD Caution Pad Configuration and Function Descriptions Outline Dimensions Die Specifications and Assembly Recommendations Ordering Guide