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Cirrus Logic

CS3302A Datasheet Preview

CS3302A Datasheet

Differential Amplifier

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CS3302A
High-Z, Programmable Gain, Differential Amplifier
Features & Description
z Signal Bandwidth: DC to 2 kHz
z Selectable Gain: x1, x2, x4, x8, x16, x32, x64
z Differential Inputs, Differential Outputs
• Multiplexed inputs: INA, INB, 800termination
• Rough / fine charge outputs for CS5371A / 72A / 73A
• Max signal amplitude: 5 Vpp differential
• Ultra-low input bias: < 1 pA
z Excellent Noise Performance
• 1 µVp-p between 0.1 Hz and 10 Hz
• 8.5 nV/ Hz from 200 Hz to 2 kHz
z Low Total Harmonic Distortion
• -118 dB THD typical (0.000126%)
• -112 dB THD maximum (0.000251%)
z Low Power Consumption
• Normal operation: 5 mA
• Power down: 10 µA
z Dual Power Supply Configuration
• VA+ = +2.5 V; VA- = -2.5 V;VD = +3.3 V
Description
The CS3302A is a high input-impedance, differential in-
put, differential output amplifier with programmable
gain, optimized for amplifying signals from high-imped-
ance 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 ex-
ternal inputs, INA and INB, simplify system design as
inputs from a sensor and test DAC. An internal 800
termination can also be selected for noise tests.
Amplifier input impedance is very high, requiring less
than 1 pA of input current. Noise performance is very
good at 1 µVp-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
See page 15.
INA+
INB+
VA+
GUARD
+
-
VD
OUTR+
OUTF+
MUX0
MUX1
GAIN0
GAIN1
GAIN2
INA-
INB-
- OUTF-
OUTR-
+
VA- PWDN GND
Preliminary Product Information
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
NOV '07
DS765PP1
Downloaded from Elcodis.com electronic components distributor




Cirrus Logic

CS3302A Datasheet Preview

CS3302A Datasheet

Differential Amplifier

No Preview Available !

CS3302A
DS765PP1
CS3302A
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS ....................................................................... 4
SPECIFIED OPERATING CONDITIONS ................................................................................ 4
ABSOLUTE MAXIMUM RATINGS .......................................................................................... 4
THERMAL CHARACTERISTICS ............................................................................................. 5
ANALOG CHARACTERISTICS ............................................................................................... 5
DIGITAL CHARACTERISTICS ................................................................................................ 8
POWER SUPPLY CHARACTERISTICS ................................................................................. 9
2. GENERAL DESCRIPTION..................................................................................................... 10
2.1. Analog Signals .............................................................................................................. 10
2.2.1.Analog Inputs ....................................................................................................... 10
2.3.2.Analog Outputs .................................................................................................... 11
2.4.3.Differential Signals ............................................................................................... 11
2.5.4.Guard Output ....................................................................................................... 11
2.6. Digital Signals ............................................................................................................... 12
2.7.1.Gain Selection...................................................................................................... 12
2.8.2.Mux Selection....................................................................................................... 12
2.9.3.Power Down Selection ......................................................................................... 12
2.10. Power Supplies ............................................................................................................. 12
2.11.1.Analog Power Supplies ...................................................................................... 12
2.12.2.Digital Power Supplies ....................................................................................... 12
2.13. Connection Diagram ..................................................................................................... 13
3. PIN DESCRIPTION ................................................................................................................ 14
4. ORDERING INFORMATION ................................................................................................. 15
5. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION ........................... 15
6. PACKAGE DIMENSIONS ...................................................................................................... 16
LIST OF FIGURES
Figure 1. CS3302A Noise Performance.......................................................................................... 5
Figure 2. Digital Input Rise and Fall Times ..................................................................................... 8
Figure 3. System Architecture....................................................................................................... 10
Figure 4. System Architecture....................................................................................................... 11
Figure 5. CS3302A Amplifier Connections.................................................................................... 13
Figure 6. CS3302A Pin Assignments............................................................................................ 14
LIST OF TABLES
Table 1. Digital Selection for Gain and Input Mux Control ............................................................. 8
Table 2. Pin Descriptions ............................................................................................................. 14
2
Downloaded from Elcodis.com electronic components distributor
DS765PP1


Part Number CS3302A
Description Differential Amplifier
Maker Cirrus Logic
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CS3302A Datasheet PDF






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