ADS8517_14 Datasheet, PDF (1/42 Pages) Texas Instruments – 16-Bit, 200-kSPS, Low-Power, Sampling ANALOG-TO-DIGITAL CONVERTER with Internal Reference and Parallel/Serial Interface

ADS8517
ADS8517
ADS8517
www.ti.com ................................................................................................................................................. SLAS527A – SEPTEMBER 2008 – REVISED JUNE 2009
16-Bit, 200-kSPS, Low-Power, Sampling ANALOG-TO-DIGITAL CONVERTER
with Internal Reference and Parallel/Serial Interface
FEATURES
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•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
• SPI™-Compatible Serial Output With
Daisy-Chain (TAG), SPI Master/Slave Feature
• 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):
– 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 and TSSOP-28 Packages
APPLICATIONS
• Portable Test Equipment
• USB Data Acquisition Module
• Medical Equipment
• Industrial Process Control
• Digital Signal Processing
• Instrumentation
DESCRIPTION
The ADS8517 is a complete low-power, single 5-V
supply, 16-bit sampling analog-to-digital (A/D)
converter. It contains a complete, 16-bit,
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.
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.
ADC
R1_IN
40 kW
10 kW
R2_IN
20 kW 40 kW
Successive Approximation Register (SAR)
CDAC
Comparator
Parallel
and
Serial
Data Out
and
Control
Parallel
Data
PWRD
BYTE
BUSY
CS
R/C
SB/BTC
TAG
SDATA
DATACLK
CAP
REF
BUF
Ref
Buffer
6 kW
REF
2.5-V
Internal Reference
Clock
EXT/INT
REFD
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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.
SPI is a trademark of Motorola, Inc.
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All other trademarks are the property of their respective owners.
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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 © 2008–2009, Texas Instruments Incorporated