ADS8513_14 Datasheet, PDF (1/34 Pages) Texas Instruments – 16-Bit, 40kSPS, Low-Power Sampling ANALOG-TO-DIGITAL CONVERTER with Internal Reference and Parallel/Serial Interface

ADS8513
www.ti.com ...................................................................................................................................................... SLAS486C – JUNE 2007 – REVISED JANUARY 2009
16-Bit, 40kSPS, Low-Power Sampling ANALOG-TO-DIGITAL CONVERTER
with Internal Reference and Parallel/Serial Interface
FEATURES
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•23 40kSPS Minimum Sampling Rate
• Very Low Power: 24mW Typ
• ±3.33V, ±5V, ±10V, 4V, and 10V Input Ranges
• 89dB SNR with 10kHz Input
• ±2LSB Max INL
• –1/+2LSB Max DNL, 16-Bit NMC
• ±10mV BPZ, ±2.5ppm/°C BPZ Drift
• 89dB Min SINAD, 102dB Min SFDR
• Uses Internal or External 2.5V Reference
• No External Calibration Resistors Required
• Single 5V Analog Supply:
– 32.5mW Max Power Dissipation
– 50µW Max Power-Down Mode
• SPI™-Compatible Serial Port up to 20MHz,
with Master/Slave Feature
• Global CONV and 3-Stated Bus for Multi-Chip
Simultaneous S/H Operation
• Pin-Compatible with 16-Bit ADS7813 and
12-Bit ADS7812 and ADS8512
• SO-16 Package
APPLICATIONS
• Industrial Process Control
• Test Equipment
• Robotics
• DSP Servo Control
• Medical Instrumentation
• Portable Data Acquisition Systems
DESCRIPTION
The ADS8513 is a complete low-power, single 5V
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 serial data interface. The converter
can be configured for a variety of input ranges
including ±10V, ±5V, 0V to 10V, and 0.5V to 4.5V. A
high-impedance, 0.3V to 2.8V input is also available
with input impedance greater than 10MΩ. For most
input ranges, the input voltage can swing to 25V or
–25V without damage to the converter.
An SPI-compatible serial interface allows data to be
synchronized to an internal or external clock. The
ADS8513 is specified at 40kSPS sampling rate over
the –40°C to +85°C industrial temperature range.
Successive Approximation Register
Clock EXT/INT
R1_IN
R2_IN
R3_IN
BUF
CAP
REF
40kΩ
8kΩ
20kΩ
CDAC
Comparator
Serial
Data
Out
and
Control
Buffer
4kΩ
Internal
+2.5 V Ref
PWRD
BUSY
CS
CONV
SDATA
DATACLK
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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, QSPI are trademarks 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 © 2007–2009, Texas Instruments Incorporated