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
APPLICATIONS
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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
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
CDAC
40kΩ
R1IN
PWRD
8kΩ
R2IN
20kΩ
R3IN
Comparator
Serial
Data
Out
and
Control
BUSY
CS
CONV
SDATA
DATACLK
BUF
CAP
Buffer
4kΩ
REF
Internal
+2.5 V Ref
1
2
3
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.
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 © 2007–2009, Texas Instruments Incorporated
