ADS8517
www.ti.com.......................................................................................................................................................................................... SLAS527–SEPTEMBER 2008
16-Bit, 200-kSPS, Low-Power, Sampling ANALOG-TO-DIGITAL CONVERTER
with Internal Reference and Parallel/Serial Interface
1
FEATURES
APPLICATIONS
•
•
•
•
•
•
Portable Test Equipment
USB Data Acquisition Module
Medical Equipment
Industrial Process Control
Digital Signal Processing
Instrumentation
23
•
200-kHz Minimum Sampling Rate
•
4-V, 5-V, and ±10-V Input Ranges with
High-Impedance Input
•
•
•
•
•
•
±1.5 LSB Max INL
+1.5/–1 LSB Max/Min DNL, 16 Bits NMC
±2-mV Max BPZ, ±0.6 ppm/°C BPZ Drift
±2-mV Max UPZ, ±0.15 ppm/°C UPZ Drift
88.8-dB SINAD with 10-kHz Input
DESCRIPTION
The ADS8517 is a complete low-power, single 5-V
supply, 16-bit sampling analog-to-digital (A/D)
converter.
capacitor-based, successive approximation register
(SAR) A/D converter with sample-and-hold, clock,
reference, and data interface. The converter can be
configured for a variety of input ranges including ±10
V, 4 V, and 5 V. For most input ranges, the input
voltage can swing to 25 V or –25 V without damage
to the device.
SPI™-Compatible Serial Output With
Daisy-Chain (TAG), SPI Master/Slave Feature
It
contains
a
complete,
16-bit,
•
•
Full Parallel Interface
Binary Twos Complement or Straight Binary
Output Code Formats
•
Single 4.5-V to 5.5-V Analog Supply, 1.65-V to
5.5-V Interface Supply
•
•
•
Uses Internal 2.5-V or External Reference
No External Precision Resistors Required
Low Power Dissipation (ADC+REF+BUF):
An SPI-compatible serial interface allows data to be
synchronized to an internal or external clock. A full
parallel interface using the selectable BYTE pin is
also provided to allow the maximum system design
flexibility. The ADS8517 is specified at a 200-kHz
sampling rate over the industrial –40°C to +85°C
temperature range.
–
47 mW Typ, 60 mW Max at 200 kSPS
•
•
50-µW Max Power-Down Mode
Pin-Compatible with 16-Bit ADS7807 and
ADS8507, and 12-Bit ADS7806 and ADS8506
•
SO-28 Package (TSSOP-28 Available Q2, 2009)
ADC
Parallel
Data
Successive Approximation Register (SAR)
PWRD
BYTE
BUSY
CS
Parallel
and
CDAC
40 kW
10 kW
Serial
Data Out
and
R1IN
R/C
SB/BTC
TAG
Control
SDATA
DATACLK
20 kW
40 kW
R2IN
CAP
Comparator
EXT/INT
REFD
Clock
BUF
Ref
Buffer
REF
6 kW
2.5-V
Internal Reference
REF
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
3
SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated