
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 1999
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS5180
Σ
Modulator & 8 kHz to 400 kHz 16-Bit ADC
Features
l
16-Bit Delta-Sigma A/D Converter
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Fully Differential Input with 4.0 V
pp
Range
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Dynamic Range: 93 dB
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Spurious Free Dynamic Range: 96 dB
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Total Harmonic Distortion: -95 dB @ 22 kHz
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Up to 400 kHz Output Word Rate
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No Missing Codes
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Non-Aliasing Low-Pass Digital Filter
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High Speed 3-Wire Serial Interface
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Supply Options:
-
VA+ = 5 V, VD+ = 5 V, 690 mW
-
VA+ = 5 V, VD+ = 3 V, 368 mW
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Modulator Output Mode
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Power Down Mode
Description
CS5180 is a fully calibrated high-speed
Σ
analog-to-
digital converter, capable of 400 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 CS5180s can be fully synchronized
in multi-channel applications with a SYNC signal. The
part has a power-down mode to minimize power con-
sumption at times of system inactivity. The high speed
digital I/O lines have complementary signals to help re-
duce radiated noise from traces on the PC board. The
CS5180 can also be operated in modulator-only mode
which provides the delta-sigma modulator bitstream as
the output.
ORDERING INFORMATION
CS5180-BL
CS5180-BQ
-40 °C to +85 °C
-40 °C to +85 °C
28-pin PLCC
44-pin TQFP
I
AIN+
AIN-
VREF+
VREFIN
VREFOUT
VREFCAP
PWDN
SYNC RESET MODE
VA+
AGND
VD+
DGND
MCLK
MCLK
MFLAG
SDO
SDO
SCLK
SCLK
FSO
Decimator
Clock
x1.6
Reference
Timing
and
Control
Serial
Interface
Σ
Modulator
VREF-
Mode
Selector
MAY ‘99
DS259PP3