Datasheet
16-Bit 250kHz Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
DESCRIPTION
The ADS7815 is a complete 16-bit sampling analog-to-
digital (A/D) converter featuring excellent AC
performance and a 250kHz throughput rate. The design
includes a 16-bit capacitor-based SAR A/D
converter with an inherent sample and hold (S/H), a preci-
sion reference, and an internal clock. Spurious-free dynamic
range with a 100kHz full-scale sinewave input is typically
greater than 100dB. The ±2.5V input range allows develop-
ment of precision systems using only ±5V supplies. The
converter is available in a 28-lead SOIC package specified
for operation over the industrial –25°C to +85°C tempera-
ture range.
ADS7815
FEATURES
● 250kHz SAMPLING RATE
● COMPLETE WITH S/H, REF, CLOCK, ETC.
● 96dB min SFDR WITH 100kHz INPUT
● 82dB min SINAD WITH 100kHz INPUT
● ±2.5V INPUT RANGE
● 28-LEAD SOIC
CDAC
Output
Latches
and
Three
State
Drivers
Comparator
Buffer
5kΩ
REF Out/In
±2.5V Input
Successive Approximation Register and Control Logic
Clock
BUSY
CS
R/C
Internal
+2.5V Ref
Parallel
Data
Bus
APPLICATIONS
● WIRELESS BASE STATIONS
● SPECTRUM ANALYSIS
● IMAGING SYSTEMS
● DATA ACQUISITION
A
D
S
7
8
1
5
SBAS065B – DECEMBER 1996 – DECEMBER 2006
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1996-2006, Texas Instruments Incorporated
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