Cirrus-logic CS3301A Manual de usuario

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Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
http://www.cirrus.com
CS3301A
Low-noise, Programmable Gain, Differential Amplifier
Features & Desription
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 outputs for CS5371A / 72A / 73A
Max signal amplitude: 5 V
pp
differential
Low input bias: 1 nA typical
z
Outstanding Noise Performance
8.5 from 0.1 Hz to 2 kHz
•0.180µV
p-p
between 0.1 Hz and 10 Hz
z
Low Total Harmonic Distortion
-121 dB THD typical (0.0000891%)
-112 dB THD maximum (0.0002512%)
z
Low Power Consumption
Normal operation: 5.5 mA typical
Power down: 10 µA typical
z
Small 24-pin SSOP Package
z Bipolar Power Supply Configuration
VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V
Description
The CS3301A is a low-noise differential input, dif-
ferential output amplifier with programmable gain,
optimized for amplifying signals from low-imped-
ance sensors such as geophones. The gain
settings are binary weighted (x1, x2, x4, x8, x16,
x32, x64) and are selected using simple pin set-
tings. Two sets of external 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 noise performance is outstanding with a
noise density of 8.5 over the 0.1 Hz to
2 kHz bandwidth. Distortion performance is also ex-
tremely good, typically -121 dB THD at x1 gain. Flat
noise down to 0.1 Hz and low total harmonic distor-
tion make this amplifier ideal for low-frequency,
low-amplitude, differential signals requiring maxi-
mum dynamic range.
ORDERING INFORMATION
See page 15.
nV/ Hz
nV/ Hz
INA+
INB+
MUX0
MUX1
INB-
INA-
VA+
VA-
VD
GND
CLK
OUTR+
OUTF+
GAIN0
GAIN1
GAIN2
OUTF-
OUTR-
PWDN
+
-
-
+
400 400
MAR ‘07
DS757F1
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Indice de contenidos

Pagina 1 - Description

Copyright © Cirrus Logic, Inc. 2007 (All Rights Reserved)http://www.cirrus.comCS3301ALow-noise, Programmable Gain, Differential AmplifierFeatures &

Pagina 2 - LIST OF TABLES

CS3301A10 DS757F12.1.3 Differential SignalsAnalog signals into and out of the CS3301A aredifferential, consisting of two halves with equal butopposite

Pagina 3 - TEMPERATURE CONDITIONS

CS3301ADS757F1 11made using the MUX0 and MUX1 pins as shown inTable 1 on page 7.Although a mux selection is provided to enable theINA and INB switches

Pagina 4 - ANALOG CHARACTERISTICS

CS3301A12 DS757F12.4 Connection DiagramFigure 5 on page 12 shows a connection diagramfor the CS3301A amplifier when used with theCS5372A dual ∆Σ modul

Pagina 5

CS3301ADS757F1 133. PIN DESCRIPTIONPin Name Pin # I/OPin DescriptionVA+1 I Positive analog supply voltage.VA-4 I Negative analog supply voltage.VD16 I

Pagina 6

CS3301A14 DS757F14. PACKAGE DIMENSIONSNotes: 1. “D” and “E1” are reference datums and do not included mold flash or protrusions, but do include mold

Pagina 7 - DIGITAL CHARACTERISTICS

CS3301ADS757F1 155. ORDERING INFORMATION 6. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION* MSL (Moisture Sensitivity Level) as specified by

Pagina 8 - POWER SUPPLY CHARACTERISTICS

CS3301A16 DS757F17. REVISION HISTORY Revision Date ChangesPP1 FEB 2007 Preliminary release.F1 MAR 2007 Updated to final for QPL (Quality Process Level

Pagina 9 - 2. GENERAL DESCRIPTION

CS3301A2 DS757F1TABLE OF CONTENTS1. CHARACTERISTICS AND SPECIFICATIONS ...

Pagina 10

CS3301ADS757F1 31. CHARACTERISTICS AND SPECIFICATIONS• Min / Max characteristics and specifications are guaranteed over the Specified Operating Condit

Pagina 11 - ±2.5 V power supplies

CS3301A4 DS757F1ANALOG CHARACTERISTICS Notes: 4. Guaranteed by design and/or characterization.5. Tested with a full scale input signal of 31.25 Hz.Par

Pagina 12 - 12 DS757F1

CS3301ADS757F1 5ANALOG CHARACTERISTICS (CONT.) 6. Common mode signals pass unchanged through the differential amplifier architecture and are rejected

Pagina 13 - 3. PIN DESCRIPTION

CS3301A6 DS757F1ANALOG CHARACTERISTICS (CONT.) Notes: 13. Ratio of input common mode amplitude vs. output differential mode amplitude for a perfectly

Pagina 14 - 24 PIN SSOP PACKAGE DRAWING

CS3301ADS757F1 7DIGITAL CHARACTERISTICS Notes: 15. Device is intended to be driven with CMOS logic levels.16. When CLK is tied to GND, an internal osc

Pagina 15 - 5. ORDERING INFORMATION

CS3301A8 DS757F1POWER SUPPLY CHARACTERISTICS Notes: 17. All outputs unloaded. Analog inputs connected to the internal 800 Ω termination. Digital input

Pagina 16 - 7. REVISION HISTORY

CS3301ADS757F1 92. GENERAL DESCRIPTIONThe CS3301A is a low-noise chopper-stabilizedCMOS differential input, differential output ampli-fier for precisi

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