Copyright © 2004, ZMD AG, Rev. 1.6, 2005-05-19

14/19

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ZMD31020

Sensor Signal Conditioner

Datasheet

3.3.7

11-bit Output DAC & Output BUFFER

(2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNIT

Output current

current source & sink

±2

mA

Analog output offset voltage

-10

10

mV

Temp.-coeff output offset voltage

-10

10

µV/K

DAC differential nonlinearity

-1

1

LSB

DAC integral nonlinearity

to best-fit straight line

-4

4

LSB

Maximal output voltage

0.975

Minimal output voltage

0.025

0

0.25

0.75

1

Load resistance

2.5

kΩ

Load capacitance

10

25

nF

3.3.8

Total System

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNIT

Startup time

power up to 1st result

40

ms

Response time

11

ms

Conversion cycle time

10

ms

Non-linearity

NL

to best-fit straight line

-2500

+2500

ppm

(3)

TC sensor signal

20

ppm/K

TC temperature

100

ppm/K

Notes for the electrical parameters:

1)

No measurement in mass production, parameter is guarantied by design.

2)

During normal operation mode using the analog output the I

digital value in parallel (= the digital input of the DAC).

3)

Analog Signal Conditioning and Analog Digital Conversion for Measurement of the Pressure Sensor

Bridge

4)

The A/D conversion of the temperature signal is done with 10 bit resolution only.