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TDC-GP22 データシート(PDF) 6 Page - ams AG

部品番号 TDC-GP22
部品情報  Ultrasonic-Flow-Converter
Download  93 Pages
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メーカー  AMSCO [ams AG]
ホームページ  http://www.ams.com
Logo AMSCO - ams AG

TDC-GP22 データシート(HTML) 6 Page - ams AG

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TDC-GP22
acam messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de
1-3
1
Overview
TDC-GP22 is next generation‘s upgrade for TDC-GP21. It is a 100% pin-to-pin and functional
compatible upgrade of TDC-GP21, with an extended functionality. Especially the new first-wave
detection capability makes the TDC-GP22 perfectly suited for ultrasonic water meters with their
high dynamics. The programmable offset range of the comparator is increased to ± 35 mV and
the offset is automatically set back to zero after the first wave detection. Measuring the relative
pulse width of the first wave gives the user an indication of the strength of the received signal.
This can be used for adopting the system to long-term signal attenuation or for bubble detection.
The multi-hit data processing and data read-out is simplified compared to TDC-GP21.
All in all, the TDC-GP22 is a further improvement and simplification for the design of ultrasonic
heat meters and a necessary step for compact ultrasonic water meters.
1.1
Features
Measurement mode 2
1 channel with typ. 90 ps resolution
Double resolution mode with 45 ps, Quad resolution mode with 22 ps resolutio n
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, programmable, ±35 mV
First-wave detection: offset set zero automatically after first wave, hit selection
relative to first wave
First-wave pulse-width measurement for signal monitoring and bubble detection
Integrated analog switches for input selection
External circuit is reduced to 2 resistors and 2 capacitors
Temperature Measurement Unit
2 or 4 sensors, PT500/PT1000 or higher
Schmitt trigger integrated
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)
Special Functions
Fire pulse generator, up to 127 pulses
Trigger to rising and/or falling edge
Precise stop enable by windowing
Low-power 32 kHz oscillator (500 nA)
Clock calibration unit
7x32 Bit EEPROM
Measurement mode 1
2 channels with typ. 90 ps resolution
channel double resolution with typ. 45 ps
Range 3.5 ns (0 ns) to 2.5 µs
20 ns pulse-pair resolution, 4-fold multihit
Member of the ams Group


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