TDC-GP21 datasheet(6/91 Pages) AMSCO

6 / 91 page

TDC-GP21

acam messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de

1-3

Overview

TDC-GP21 is next generation‘s upgrade for TDC-GP2. It offers pin-to-pin and functional

compatibility, several feature improvements and an extended functionality. Analog elements like a

chopper stabilized comparator and analog switches simplify external circuits in a significant

manner. In parallel, measurement quality is improved and operating current is reduced. The

firepulse generator is extended, a new low-power 32 kHz oscillator driver is implemented and the

temperature measuring unit is further improved. All in all, the TDC-GP21 is perfectly suited to

design ultra-compact and low-cost ultrasonic flow meters and heat meters. If the integrated

analog elements of the TDC-GP21 are used, the average operating current of a typical heatmeter

application can be reduced to 2.2 µA.

1.1

Features

Measurement mode 2



1 channel with typ. 90 ps resolution

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Double resolution mode with 45 ps, Quad resolution mode with 22 ps resolution



Measurement range 700 ns to 4 ms



3-fold multihit capability with automatic processing of all 3 data

Analog Input Circuit



Chopper-stabilized low-offset comparator

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Offset programmable, -8 to 7 mV

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Integrated analog switches for input selection

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External circuit is reduced to 2 resistors and 2 capacitors

Temperature Measurement Unit



2 or 4 sensors, PT500/PT1000 or higher



Schmitt trigger integrated

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16-Bit eff. with external Schmitt trigger, 17.5-Bit eff. with integrated low noise

Schmitt trigger



Ultra low current (0.08 µA when measuring every 30 seconds)

Member of the ams Group

TDC-GP21 Datasheet(PDF) 6 Page - ams AG

TDC-GP21 Datasheet(HTML) 6 Page - ams AG

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