CS5181 Datasheet, PDF (1/24 Pages) Cirrus Logic – Modulator & 400 kHz to 625 kHz 16-Bit ADC

CS5181
∆Σ Modulator & 400 kHz to 625 kHz 16-Bit ADC
Features
l 16-Bit Delta-Sigma A/D Converter
l Fully Differential Input with 4.0 V_pp Range
l Dynamic Range: 93 dB
l Spurious Free Dynamic Range: 90 dBc
l Harmonic Distortion: 89 dB
l Up to 625 kHz Output Word Rate
l No Missing Codes
l Non-Aliasing Low-Pass Digital Filter
l High Speed 3-Wire Serial Interface
l Supply Requirements:
- VA+ = 5 V, VD+ = 3.3 V: 570 mW
l Modulator Output Mode
l Power-Down Mode
Description
CS5181 is a fully calibrated high-speed ∆Σ analog-to-
digital converter, capable of 625 kSamples/second out-
put word rate (OWR). The OWR scales with the master
clock. It consists of a 5th order ∆Σ modulator, decimation
filter, and serial interface. The chip can use the 2.375 V
on-chip voltage reference, or an external 2.5 V refer-
ence. The input voltage range is 1.6 × VREFIN V_pp fully
differential. Multiple CS5181s can be fully synchronized
in multi-channel applications with a sync signal. The part
has a power-down mode to minimize power consump-
tion at times of system inactivity. The high speed digital
I/O lines have complementary signals to help reduce ra-
diated noise from traces on the PC board layout. The
CS5181 can also be operated in modulator-only mode
which provides the delta-sigma modulator bitstream as
the output.
ORDERING INFORMATION
CS5181-BL -40 °C to +85 °C 28-pin PLCC
I
VA+ AGND
VD+ DGND
AIN+
AIN-
VREF-
VREF+
VREFIN
∆Σ
Modulator
x1.6
VREFOUT
VREFCAP
Reference
Decimator
Clock
MCLK
MCLK
Mode
Selector
Timing
and
Control
Serial
Interface
MFLAG
SDO
SDO
SCLK
SCLK
FSO
PWDN
Preliminary Product Information
Cirrus Logic, Inc.
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.crystal.com
SYNC RESET MODE
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 1999
(All Rights Reserved)
APR ‘99
DS250PP1
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