BurrĆBrown Products
from Texas Instruments
ADS8509
SLAS324 – OCTOBER 2004
16-BIT 200-KSPS SERIAL CMOS SAMPLING ANALOG-TO-DIGITAL CONVERTER
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DESCRIPTION
200-kHz Min Sampling Rate
4 V, 5 V, 10 V, ±3.33 V, ±5 V, and ±10 V Input
Ranges
86-dB SINAD With 20-kHz Input
±2.0 LSB INL
DNL: 16-Bits No Missing Codes
Six Specified Input Ranges
Serial Output
5-V Supply
Pin-Compatible With ADS7808/09 (Low Speed)
and 12-Bit ADS8508
Uses Internal or External Reference
60-mW Typ Power Dissipation at 200 KSPS
20-Pin SO and 28-Pin SSOP Packages
Simple DSP Interface
APPLICATIONS
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The ADS8509 is a complete 16-bit sampling
analog-to-digital (A/D) using state-of-the-art CMOS
structures. It contains a complete 16-bit, capacitorbased, successive approximation register (SAR) A/D
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 200-kHz sampling rate
over the full temperature range. Calibrated 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.
Industrial Process Control
Data Acquisition Systems
Digital Signal Processing
Medical Equipment
Instrumentation
R/C
CS
Power Down
Successive Approximation Register and Control Logic
Clock
CDAC
10 kΩ
BUSY
R1IN
5 kΩ
Serial
Data
Out
R2IN
2.5 kΩ
R3IN
EXT/INT
10 kΩ
Comparator
Data
Clock
Serial
Data
CAP
Buffer
Internal
+2.5 V Ref
4 kΩ
REF
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.
PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the
right to change or discontinue these products without notice.
Copyright © 2004, Texas Instruments Incorporated
PRODUCT PREVIEW
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