ADS8509_14 Datasheet, PDF (1/32 Pages) Texas Instruments – 16-BIT 250-KSPS SERIAL CMOS SAMPLING ANALOG-TO-DIGITAL CONVERTER

ADS8509
www.ti.com
SLAS324C – OCTOBER 2004 – REVISED APRIL 2010
16-BIT 250-KSPS SERIAL CMOS SAMPLING ANALOG-TO-DIGITAL CONVERTER
Check for Samples: ADS8509
FEATURES
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•2 250-kHz Sampling Rate
• 4-V, 5-V, 10-V, ±3.33-V, ±5-V, and ±10-V Input
Ranges
• ±2 LSB Max INL
• ±1 LSB Max DNL, 16-Bit No Missing Codes
• SPI Compatible Serial Output with Daisy-Chain
(TAG) Feature
• Single 5-V Supply
• Pin-Compatible with ADS7809 (Low Speed)
and 12-Bit ADS8508/7808
• Uses Internal or External Reference
• 70-mW Typ Power Dissipation at 250 KSPS
• 20-Pin SO and 28-Pin SSOP Packages
• Simple DSP Interface
APPLICATIONS
• Industrial Process Control
• Data Acquisition Systems
• Digital Signal Processing
• Medical Equipment
• Instrumentation
DESCRIPTION
The ADS8509 is a complete 16-bit sampling
analog-to-digital (A/D) converter using state-of-the-art
CMOS structures. It contains a complete 16-bit,
capacitor-based, successive approximation register
(SAR) A/D converter with sample-and-hold,
reference, clock, and a serial data interface. Data can
be output using the internal clock or can be
synchronized to an external data clock. The ADS8509
also provides an output synchronization pulse for
ease of use with standard DSP processors.
The ADS8509 is specified at a 250-kHz sampling rate
over the full temperature range. Precision resistors
provide various input ranges including ±10 V and 0 V
to 5 V, while the innovative design allows operation
from a single +5-V supply with power dissipation
under 100 mW.
The ADS8509 is available in 20-pin SO and 28-pin
SSOP packages, both fully specified for operation
over the industrial -40°C to 85°C temperature range.
Successive Approximation Register
Clock EXT/INT
R1_IN
R2_IN
R3_IN
9.8 kΩ
4.9 kΩ
2.5 kΩ
CAP
REF
CDAC
10 kΩ
Buffer
4 kΩ
Internal
+2.5 V Ref
Comparator
Serial
Data
Out
&
Control
BUSY
DATACLK
DATA
R/C
SB/BTC
CS
PWRD
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
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