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SLAS568 – MAY 2008
16-BIT, 500-KSPS, SERIAL INTERFACE MICROPOWER, MINIATURE,
SAR ANALOG-TO-DIGITAL CONVERTER
1
FEATURES
500-kHz Sample Rate
16-Bit Resolution
Zero Latency at Full Speed
Unipolar, Differential Input, Range: –V
ref
to V
ref
SPI Compatible Serial Interface with Daisy
Chain Option
Excellent Performance:
– 95.2dB SNR Typ at 10-kHz I/P
– –108dB THD Typ at 10-kHz I/P
– ±1.0 LSB Max INL
– ±0.75 LSB Max DNL
Low Power Dissipation: 18 mW Typ at 500
KSPS
Power Scales Linearly with Speed: 3.6 mW/100
KSPS
Power Dissipation During Power-Down State:
0.25
µW
Typ
10-Pin MSOP and SON Packages
DESCRIPTION
The ADS8318 is a 16-bit, 500-KSPS analog-to-digital
converter. It operates with a 2.048-V to 5.5-V external
reference. The device includes a capacitor based,
SAR A/D converter with inherent sample and hold.
The devices includes a 50-MHz SPI compatible serial
interface. The interface is designed to support daisy
chaining or cascading of multiple devices. Also a
Busy Indicator
makes it easy to synchronize with the
digital host.
The ADS8318 unipolar differential input range
supports a differential input swing of –V
ref
to +V
ref
with
a common-mode of +V
ref
/2.
Device operation is optimized for very low power
operation, and the power consumption directly scales
with speed. This feature makes it attractive for lower
speed applications.
It is available in 10-pin MSOP and SON packages.
+VA
+VBD
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APPLICATIONS
Battery Powered Equipments
Data Acquisition Systems
Instrumentation and Process Control
Medical Electronics
Optical Networking
IN+
CDAC
IN-
SAR
O/P
Drive
SDO
COMP
I/P
Shift
Reg
SDI
REFIN
ADS8318
Conversion and I/O
Control Logic
SCLK
GND
CONVST
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.
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
TI [ TEXAS INSTRUMENTS ]
