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Chapter 4

Specifications

Typical for 25°C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

Table 1. Analog input specifications

Parameter

Specification

A/D converter type

AD574

Resolution

12 bits

Number of channels

48 single-ended, 24 differential (configurable as 24 modified differential via

installation of SIP resistor)

Input type

Voltage input or current input, configurable by jumper and installation of SIP

resistors for current configuration

Input ranges

±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, 0 to 10 V, 0 to 5 V, 0 to 2.5 V, 0 to

1.25 V, software selectable

Polarity

Unipolar/Bipolar, software selectable

A/D pacing

Software polled

Data transfer

Software polled

A/D conversion time

25µs

Throughput

20 kS/s, PC dependent

Accuracy

±0.01% of reading ±1 LSB

Differential linearity error

±1 LSB

Integral linearity error

±0.5 LSB

No missing codes guaranteed

12 bits

Gain drift (A/D specs)

±25 ppm/°C

Zero drift (A/D specs)

±10 µV/°C

Common mode range

±10 V

CMRR

72 dB

Input leakage current (@ 25 C)

100 nA

Input impedance

10 Meg Ohms min

Absolute maximum input voltage

±35V

Noise distribution (Rate = 1-10 kHz, Average % +/- 2 bins, Average % +/- 1 bin, Average # bins)

Bipolar

10V 100% / 100% / 3 bins

5V 100% / 98.8% / 4 bins

2.5V 100% / 96.8% / 4 bins

1.25V 100% / 98.2% / 5 bins

0.625V 100% / 99% / 5 bins

Unipolar

10V 100% / 98.6% / 4 bins

5V 100% / 98.8% / 4 bins

2.5V 100% / 97.4% / 4 bins

1.25V 100% / 98.2% / 4 bins

Power consumption

Table 2. Power consumption specifications

+5 V

620 mA typical, 800 mA max

1 2 ... 10 11 12 13 14 15 16 17 18

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