28
Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in
italic text
are guaranteed by design.
Analog Input
Parameter Conditions
Specification
A/D converter type
Successive approximation type
Input voltage range for linear operation,
single-ended mode
CHx to GND
±10 V max
Input voltage range for linear operation,
differential mode
CHx to GND
-10 V min, +20V max
Absolute maximum input voltage
CHx to GND
±40 V max
Vin = +10 V
70 µA typ
Vin = 0 V
-12 µA typ
Input current (Note 1)
Vin = -10 V
-94 µA typ
Number of channels
8 single-ended / 4 differential,
software selectable
Input ranges, single-ended mode
±10 V, G=2
Input ranges, differential mode
±20 V, G=1
±10 V, G=2
±5 V, G=4
±4 V, G=5
±2.5 V, G=8
±2.0 V, G=10
±1.25 V, G=16
±1.0 V, G=20
Software selectable
Software paced
50 S/s
Continuous scan
1.2 kS/s
Throughput
Burst scan to 4K sample
FIFO
8 kS/s
Channel gain queue
Up to 8 elements
Software configurable channel, range,
and gain.
Differential
12 bits, no missing codes
Resolution (Note 2)
Single-ended
11 bits
CAL accuracy
CAL = 2.5 V
±0.05% typ, ±0.25% max
Integral linearity error
±1 LSB typ
Differential linearity error
±0.5 LSB typ
Repeatability
±1 LSB typ
Source
5 mA max
CAL current
Sink
20 µA min, 200 nA typ
Trigger source
Software selectable External
digital:
DIO0-DIO3
Note 1:
Input current is a function of applied voltage on the analog input channels. For a given input voltage,
Vin, the input leakage is approximately equal to (8.181*Vin-12) µA.
Note 2:
The AD7870 converter only returns 11-bits (0-2047 codes) in single-ended mode.
Summary of Contents for RedLab 1008
Page 1: ......
