CS3302 Datasheet, PDF (1/15 Pages) Cirrus Logic – HIGH Z PROGRAMMABLE GAIN DIFFERENTIAL AMPLIFIER

CS3302
High-Z Programmable Gain Differential Amplifier
Features
Description
Signal bandwidth: DC to 2 kHz
Selectable gain: x1, x2, x4, x8, x16, x32, x64
Differential inputs, differential outputs
• Multiplexed inputs: INA, INB, 800Ω termination
• Rough / fine charge outputs for CS5371/72
• Max signal amplitude: 5 V_p-p differential
• Ultra-low input bias: < 1 pA
Excellent noise performance
• 1 µV_p-p between 0.1 Hz and 10 Hz
• 8.5 nV/ √Hz from 200 Hz to 2 kHz
Low total harmonic distortion
• -118 dB THD typical (0.000126%)
• -112 dB THD maximum (0.000251%)
Low power consumption
• Normal / LPWR / PWDN: 5 mA, 3.3 mA, 10 µA
Single or dual power supply configurations
• VA+ = +5 V; VA- = 0 V; VD = +3.3 V to +5 V
• VA+ = +2.5 V;VA- = -2.5 V;VD = +3.3 V
The CS3302 is a high input impedance differential in, dif-
ferential out amplifier with programmable gain, optimized
for amplifying signals from high impedance sensors such
as hydrophones. The gain settings are binary weighted
(x1, x2, x4, x8, x16, x32, x64) and are selected using
simple pin settings. Two sets of external inputs, INA and
INB, simplify system design as inputs from a sensor and
test DAC. An internal 800Ω termination can also be se-
lected for noise tests.
Amplifier input impedance is very high, requiring less
than 1 pA of input current. Noise performance is very
good at 1 µV_p-p between 0.1 Hz and 10 Hz, and a noise
density of 8.5 nV/ √Hz over the 200 Hz to 2 kHz band-
width. Distortion performance is also extremely good,
typically -118 dB THD. Low input current, low noise, and
low total harmonic distortion make this amplifier ideal for
high impedance differential sensors requiring maximum
dynamic range.
ORDERING INFORMATION
CS3302-IS -40ºC to +85ºC 24-pin SSOP
VA+
GUARD
VD
INA+
INB+
MUX0
MUX1
+
570500 Ω
OUTR+
-
OUTF+
57050 Ω
GAIN0
GAIN1
GAIN2
INA-
INB-
570500 Ω
-
OUTF-
OUTR-
+
57050 Ω
VA-
LPWR PWDN DGND
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Cirrus Logic, Inc.
www.cirrus.com
 Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
JUN ‘03
DS596PP2
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