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ADS1207IDGKT

Description
LOW-POWER, SYNCHRONOUS VOLTAGE-TO-FREQUENCY CONVERTER
File Size151KB,8 Pages
ManufacturerBurr-Brown
Websitehttp://www.burr-brown.com/
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ADS1207IDGKT Overview

LOW-POWER, SYNCHRONOUS VOLTAGE-TO-FREQUENCY CONVERTER

ADS1206
ADS1207
SBAS311 − MARCH 2004
Low Power, Synchronous
Voltage to Frequency Converter
FEATURES
D
Syncronous Operation
D
Frequency Set By External Clock
D
Maximum Input Frequency:
D
D
D
D
D
D
Alternate Source for AD7740
D
−40°C to +85°C Operating Temperature Range
APPLICATIONS
D
Galvanic Isolation Measurement
D
High Voltage Measurement
D
Low-Cost Analog-to-Digital Conversion
D
Motor Control
D
Industrial Process Control
D
Instrumentation
D
Smart Transmitters
D
Portable Instruments
− 1MHz for ADS1206
− 4MHz for ADS1207
Selectable High-Impedance Buffered Input
2% Internal, 2.5V Reference Voltage
High-Current Output Driver
Power Supply 3.3V or 5V
Low Power : 3mW (typ)
DESCRIPTION
The ADS1206 and ADS1207 are a low-cost,
high-performance, synchronous voltage-to-frequency
converters (VFC). Both devices can operate from a single
3.0V to 3.6V or 4.5V to 5.5V power supply, consuming only
1mA. The output signal is synchronous with the input
clock, CLKIN. The clock input is TTL- and CMOS-
compatible and the onboard clock generator can also
accept an external crystal or resonator. The maximum
input clock frequency for the ADS1206 is 1MHz and for the
ADS1207 is 4MHz. The clock divider on the ADS1207
scales the input frequency to 2MHZ, which permits the
core to operate at the higher rate. The high-impedance
input is ideal for direct connection to high-impedance
transducers or high-voltage resistive dividers. Counting
output pulses over a 4ms period results in an effective
12-bit resolution for the ADS1206 using a 1MHz input
clock. For the ADS1207 using a 4MHz input clock, the
same result occurs over a 2ms period. Both devices are
designed for use in medium-resolution measurements.
They are available in an 8-lead VSSOP package.
REFIN/OUT
1kΩ
Reference
Voltage
2.5V
VIN
x1
Modulator
Buffer
FOUT
−2
ADS1207
Only
BUF
CLKOUT
CLKIN
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.
All trademarks are the property of their respective owners.
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
www.ti.com
PRODUCT PREVIEW

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