ADS8506 Datasheet, PDF (1/28 Pages) Burr-Brown (TI) – 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE

BurrĆBrown Products
from Texas Instruments
ADS8506
SLAS484A – SEPTEMBER 2007 – REVISED OCTOBER 2007
12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH
INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
FEATURES
1
•2 40-kHz Min Sampling Rate
• 4-V, 5-V, and ±10-V Input Ranges
• 73.9-dB SINAD with 10-kHz Input
• ±0.45 LSB Max INL
• ±0.45 LSB Max DNL, 12-Bit No Missing Codes
• ±5-mV BPZ, ±0.5 PPM/°C BPZ Drift
• SPI Compatible Serial Output With
Daisy-Chain (TAG) Feature
• Single 5-V Analog Supply
• Pin-Compatible With ADS7806 and 16-Bit
ADS7807/8507
• Uses Internal or External 2.5-V Reference
• Low Power Dissipation
– 24 mW Typ, 30 mW Max at 40 KSPS
• 50-μW Max Power Down Mode
• 28-Pin SO Package
• Full Parallel Interface
• 2's Comp or BTC Output Code
APPLICATIONS
• Industrial Process Control
• Test Equipment
• Medical Equipment
• Data Acquisition Systems
• Digital Signal Processing
• Instrumentation
DESCRIPTION
The ADS8506 is a complete low power, single 5-V
supply, 12-bit sampling analog-to-digital (A/D)
converter. It contains a complete 12-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 converter.
A SPI compatible serial interface allows data to be
synchronized to an internal or external clock. A full
parallel interface with BYTE select is also provided to
allow the maximum system design flexibility. The
ADS8506 is specified at 40 kHz sampling rate over
the industrial -40°C to 85°C temperature range.
Successive Approximation Register
Clock EXT/IN
R1_IN
R2_IN
39.8 kΩ
9.9 kΩ
20 kΩ
CAP
REF
40 kΩ
CDAC
Buffer
6 kΩ
Comparator
Parallel
and
Serial
Data
Out
&
Control
Internal
+2.5 V Ref
Parallel
Data
PWRD
BYTE
BUSY
CS
R/C
SB/BTC
TAG
SDATA
DATACLK
REFD
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.
QSPI, SPI are trademarks of Motorola.
2
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, Texas Instruments Incorporated