SBAS301A − OCTOBER 2003 − REVISED JUNE 2004

Four 1Bit, 10MHz, 2ndOrder,

DeltaSigma Modulators

ADS1204

FEATURES

10-Bit Effective Resolution with 10

µs Signal

Delay (12-Bit with 19

µs)

−40

°C to +85°C

APPLICATIONS

DESCRIPTION

The ADS1204 is a four-channel, high-performance device,

with four delta-sigma (

∆Σ) modulators with 100dB dynamic

range, operating from a single +5V supply. The differential

inputs are ideal for direct connection to transducers in an

industrial environment. With the appropriate digital filter

and modulator rate, the device can be used to achieve

16-bit analog-to-digital (A/D) conversion with no missing

code. Effective resolution of 12 bits can be obtained with

a digital filter data rate of 160kHz at a modulator rate of

10MHz. The ADS1204 is designed for use in medium- to

high-resolution

measurement

applications

including

current measurements, smart transmitters, industrial

process control, weight scales, chromatography, and

portable instrumentation. It is available in a QFN-32 (5x5)

package.

2nd−Order

∆Σ Modulator

CH A+

AV

DD

CH A

−

Output

Interface

Circuit

RC

Oscillator

20MHz

Out

EN

Clock

Select

Divider

REFIN A

Reference

Voltage

2.5V

REFOUT

OUT A

OUT B

OUT C

OUT D

CLKIN

AGND

BGND

BV

DD

CLKOUT

CLKSEL

2nd−Order

∆Σ Modulator

CH B+

CH B

−

REFIN B

2nd−Order

∆Σ Modulator

CH C+

CH C

−

REFIN C

2nd−Order

∆Σ Modulator

CH D+

CH D

−

REFIN D

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

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