Cirrus-logic CS3302A Uživatelský manuál stáhnout pdf

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

Selectable Gain: x1, x2, x4, x8, x16, x32, x64

Differential Inputs, Differential Outputs

• Multiplexed inputs: INA, INB, 800Ω termination

• Rough / fine charge outputs for CS5371A / 72A / 73A

• Max signal amplitude: 5 V

differential

• Ultra-low input bias: < 1 pA

Excellent Noise Performance

•1µV

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 operation: 5 mA

• Power down: 10 µA

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 800Ω

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

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-

GND

GUARD

OUTR+

OUTF+

GAIN0

GAIN1

GAIN2

OUTF-

OUTR-

PWDN

400 Ω 400 Ω

NOV '07

DS765PP1

CS3302A

1 2 3 4 5 6 ... 15 16

Shrnutí obsahu

Strany 1 - Description

Strany 2

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

Strany 3

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

Strany 4

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

Strany 5 - THERMAL CHARACTERISTICS

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

Strany 6

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

Strany 7 - ANALOG CHARACTERISTIC (Cont.)

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

Strany 8 - DIGITAL CHARACTERISTICS

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

Strany 9 - POWER SUPPLY CHARACTERISTICS

CS3302ACS3302ADS765PP12 DS765PP1TABLE OF CONTENTS1. CHARACTERISTICS AND SPECIFICATIONS ...

Strany 10 - 2. GENERAL DESCRIPTION

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

Strany 11

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

Strany 12

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

Strany 13

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

Strany 14 - 3. PIN DESCRIPTION

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

Strany 15 - 4. ORDERING INFORMATION

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

Strany 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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