Cirrus Logic CS5508 - Manual

1
Copyright © Cirrus Logic, Inc. 1997
(All Rights Reserved)
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
CS5505/6/7/8
Very Low Power, 16-Bit and 20-Bit A/D Converters
Features
l Very Low Power Consumption
- Single supply +5 V operation: 1.7 mW
- Dual supply ±5 V operation: 3.2 mW
l Offers superior performance to VFCs and
multi-slope integrating ADCs
l Differential Inputs
- Single-channel (CS5507/8) and Four-channel
(CS5505/6) pseudo-differential versions
l Either 5 V or 3.3 V Digital Interface
l Linearity Error:
- ±0.0015% FS (16-bit CS5505/7)
- ±0.0007% FS (20-bit CS5506/8)
l Output update rates up to 100 Sps
l Flexible Serial Port
l Pin-Selectable Unipolar/Bipolar Ranges
Description
The CS5505/6/7/8 are a family of low power CMOS A/D
converters which are ideal for measuring low-frequency
signals representing physical, chemical, and biological
processes.
The CS 5507/8 have single-channel differential analog
and reference inputs while the CS5505/6 have four
pseudo-differential analog input channels. The
CS5505/7 have a 16-bit output word. The CS5506/8
have a 20-bit output word.The CS5505/6/7/8 sample
upon command up to 100 Sps.
The on-chip digital filter offers superior line rejection at
50 and 60 Hz when the device is operated from a
32.768 kHz clock (output word rate = 20 Sps).
The CS 5505/6/7/8 include on-chip self-calibration cir-
cuitry which can be initiated at any time or temperature
to ensure minimum offset and full-scale errors.
The CS5505/6/7/8 serial port offers two general-purpose
modes for the direct in terface to shift r egisters or syn-
chronous serial ports of industry-standard
microcontrollers.
ORDERING INFORMATION
See page 30 .
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Copyright  Cirrus Logic, Inc. 2009
(All Rights Reserved)
http://www.cirrus.com
CS5505/6/7/8
Very Low Power, 16-bit & 20-bit A/D Converters
OCT ‘09
DS59F7