Cirrus-logic CS3302A Manuel d'utilisateur

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Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
http://www.cirrus.com
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, 800 termination
Rough / fine charge outputs for CS5371A / 72A / 73A
Max signal amplitude: 5 V
pp
differential
Ultra-low input bias: < 1 pA
z
Excellent Noise Performance
•1µV
p-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 µ
V
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
See page 15.
INA+
INB+
MUX0
MUX1
INB-
INA-
VA+
VA-
VD
GND
GUARD
OUTR+
OUTF+
GAIN0
GAIN1
GAIN2
OUTF-
OUTR-
PWDN
+
-
-
+
400 400
NOV '07
DS765PP1
CS3302A
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Résumé du contenu

Page 1 - Description

Copyright © Cirrus Logic, Inc. 2007(All Rights Reserved)Preliminary Product InformationThis document contains information for a new product. Cirrus Lo

Page 2

CS3302ACS3302ADS765PP110 DS765PP12. GENERAL DESCRIPTIONThe CS3302A is a high-impedance, low-noiseCMOS differential input, differential output ampli-fi

Page 3

CS3302ACS3302ADS765PP1DS765PP1 11requires two series resistors and a differential capaci-tor to create the modulator anti-alias RC filter. 2.1.3 Diffe

Page 4

CS3302ACS3302ADS765PP112 DS765PP12.2.2 Mux SelectionThe analog inputs to the amplifier are multiplexed,with external signals applied to the INA+, INA-

Page 5 - THERMAL CHARACTERISTICS

CS3302ACS3302ADS765PP1DS765PP1 132.4 Connection DiagramFigure 5 shows a connection diagram for the CS3302A amplifier when used with the CS5372A dual ∆

Page 6

CS3302ACS3302ADS765PP114 DS765PP13. PIN DESCRIPTIONPin Name Pin # I/OPin DescriptionVA+1 I Positive analog supply voltage.VA-4 I Negative analog suppl

Page 7 - ANALOG CHARACTERISTIC (Cont.)

CS3302ACS3302ADS765PP1DS765PP1 154. ORDERING INFORMATION 5. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION* MSL (Moisture Sensitivity Level)

Page 8 - DIGITAL CHARACTERISTICS

CS3302ACS3302ADS765PP116 DS765PP16. PACKAGE DIMENSIONSNotes: 1. “D” and “E1” are reference datums and do not included mold flash or protrusions, but

Page 9 - POWER SUPPLY CHARACTERISTICS

CS3302ACS3302ADS765PP12 DS765PP1TABLE OF CONTENTS1. CHARACTERISTICS AND SPECIFICATIONS ...

Page 10 - 2. GENERAL DESCRIPTION

CS3302ACS3302ADS765PP1DS765PP1 3REVISION HISTORY Revision Date ChangesPP1 NOV 2007 Initial release.Contacting Cirrus Logic SupportFor all product ques

Page 11

CS3302ACS3302ADS765PP14 DS765PP11. CHARACTERISTICS AND SPECIFICATIONS• Min/Max characteristics and specifications are guaranteed over the Specified Op

Page 12

CS3302ACS3302ADS765PP1DS765PP1 5THERMAL CHARACTERISTICSANALOG CHARACTERISTICSNotes: 4. Guaranteed by design and/or characterization.5. Tested with a 3

Page 13

CS3302ACS3302ADS765PP16 DS765PP1ANALOG CHARACTERISTICS (CONT.) Notes: 6. Common mode signals pass unchanged through the differential amplifier archite

Page 14 - 3. PIN DESCRIPTION

CS3302ACS3302ADS765PP1DS765PP1 7ANALOG CHARACTERISTIC (Cont.)Notes: 13. Ratio of common mode input amplitude vs. differential mode output amplitude fo

Page 15 - 4. ORDERING INFORMATION

CS3302ACS3302ADS765PP18 DS765PP1DIGITAL CHARACTERISTICS Notes: 15. Device is intended to be driven with CMOS logic levels.Parameter SymbolCS3302AUnitM

Page 16 - 24 PIN SSOP PACKAGE DRAWING

CS3302ACS3302ADS765PP1DS765PP1 9POWER SUPPLY CHARACTERISTICS Notes: 16. All outputs unloaded. Analog inputs connected to the internal 800 Ω terminatio

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