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Cirrus Logic
Cirrus Logic

CS3301A Datasheet Preview

CS3301A Datasheet

Differential Amplifier

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CS3301A pdf
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, 800termination
• Rough / fine outputs for CS5371A / 72A / 73A
• Max signal amplitude: 5 Vpp differential
• Low input bias: 1 nA typical
z Outstanding Noise Performance
• 8.5 nV/ Hz from 0.1 Hz to 2 kHz
• 0.180 µVp-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 nV/ Hz 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.
VA+
CLK
VD
INA+
INB+
+
OUTR+
- OUTF+
MUX0
MUX1
GAIN0
GAIN1
GAIN2
INA-
INB-
VA-
-
+
PWDN GND
OUTF-
OUTR-
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
MAR ‘07
DS757F1



Cirrus Logic
Cirrus Logic

CS3301A Datasheet Preview

CS3301A Datasheet

Differential Amplifier

No Preview Available !

CS3301A pdf
CS3301A
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS .............................................................................. 3
SPECIFIED OPERATING CONDITIONS ....................................................................................... 3
ABSOLUTE MAXIMUM RATINGS ................................................................................................. 3
TEMPERATURE CONDITIONS .................................................................................................... 3
ANALOG CHARACTERISTICS ..................................................................................................... 4
DIGITAL CHARACTERISTICS ...................................................................................................... 7
POWER SUPPLY CHARACTERISTICS ........................................................................................ 8
2. GENERAL DESCRIPTION ............................................................................................................. 9
2.1. Analog Signals .......................................................................................................................... 9
2.2.1. Analog Inputs................................................................................................................ 9
2.3.2. Analog Outputs ............................................................................................................. 9
2.4.3. Differential Signals...................................................................................................... 10
2.5. Digital Signals ......................................................................................................................... 10
2.6.1. Clock Input.................................................................................................................. 10
2.7.2. Gain Selection ............................................................................................................ 10
2.8.3. Mux Selection ............................................................................................................. 10
2.9.4. Power Down Selection................................................................................................ 11
2.10.Power Supplies ..................................................................................................................... 11
2.11.1. Analog Power Supplies............................................................................................... 11
2.12.2. Digital Power Supplies................................................................................................ 11
2.13.Connection Diagram.............................................................................................................. 12
3. PIN DESCRIPTION ....................................................................................................................... 13
4. PACKAGE DIMENSIONS ............................................................................................................. 14
5. ORDERING INFORMATION ........................................................................................................ 15
6. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION .................................. 15
7. REVISION HISTORY ................................................................................................................... 16
LIST OF FIGURES
Figure 1. CS3301A Noise Performance .......................................................................................... 4
Figure 2. Digital Input Rise and Fall Times ..................................................................................... 7
Figure 3. Multi-Channel System Architecture.................................................................................. 9
Figure 4. Single-Channel System Architecture ............................................................................. 10
Figure 5. CS3301A Amplifier Connections.................................................................................... 12
Figure 6. CS3301A Pin Assignments ............................................................................................ 13
LIST OF TABLES
Table 1. Digital Selections for Gain and Input Mux Control ............................................................ 7
Table 2. Pin Descriptions ............................................................................................................. 13
2 DS757F1


Part Number CS3301A
Description Differential Amplifier
Maker Cirrus Logic
Total Page 16 Pages
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