ADS1207 Burr-Brown Corporation, ADS1207 Datasheet

ADS1207

Manufacturer Part Number

ADS1207

Description

(ADS1206 / ADS1207) LOW-POWER / SYNCHRONOUS VOLTAGE-TO-FREQUENCY CONVERTER

Manufacturer

Burr-Brown Corporation

Datasheet

1.ADS1207.pdf (8 pages)

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FEATURES

APPLICATIONS

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.

All trademarks are the property of their respective owners.

Syncronous Operation

Frequency Set By External Clock

Maximum Input Frequency:

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)

Alternate Source for AD7740

−40°C to +85°C Operating Temperature Range

Galvanic Isolation Measurement

High Voltage Measurement

Low-Cost Analog-to-Digital Conversion

Motor Control

Industrial Process Control

Instrumentation

Smart Transmitters

Portable Instruments

− 1MHz for ADS1206

− 4MHz for ADS1207

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.

Voltage to Frequency Converter

Low Power, Synchronous

www.ti.com

DESCRIPTION

The

high-performance,

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.

VIN

ADS1206

BUF

and

synchronous

REFIN/OUT

Modulator

ADS1207

−2

Only

1kΩ

CLKOUT

voltage-to-frequency

SBAS311 − MARCH 2004

are

Buffer

Reference

Voltage

2.5V

CLKIN

ADS1206

ADS1207

low-cost,

FOUT

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