TDC-GP22 datasheet(13/93 Pages) AMSCO

13 / 93 page

Ultrasonic-Flow-Converter

TDC-GP22

2-6

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

max. Gain Error

(@ dӨ = 100 K)

0,05%

0,02%

< 0.01%

Gain-Drift vs. Temp

0.022

0.017

0.012

0.0082

%/10

Gain-Drift vs. Vio

0,08

%/V

Initial Zero Offset

< 20

<10

< 20

< 10

Offset Drift vs. Temp

< 0.05

< 0.03

< 0,012

< 0.0082

mK/ °C

PSRR

>100

1 All values measured at Vio = Vcc = 3.0 V, Cload = 100 nF for PT1000 and 200 nF for

PT500 (C0G-type)

2 measured with external 74AHC14 Schmitt trigger

3 compared to an ideal gain of 1

2.3

Timings

At Vcc = 3.0 V ± 0.3 V, ambient temperature -40 °C to +85 °C unless otherwise specified

Oscillator

Symbol

Parameter

Min.

Typ.

Max.

Unit

Clk32

32 kHz reference oscillator

32,768

kHz

t32st

32 kHz oscillator start-up time after power-up

250

ClkHS

High-speed reference oscillator

MHz

toszst

Oscillator start-up time with ceramic resonator

100

µs

toszst

Oscillator start-up time with crystal oscillator

Note:

It is strongly recommended to use a ceramic oscillator. Exactly because a quartz needs

much longer to settle than a ceramic oscillator. This costs a lot current, but using a

quartz oscillator has no advantage.

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TDC-GP22 Datasheet(PDF) 13 Page - ams AG

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