Digi RCM4000 - Manual (Page 88)

82 RabbitCore RCM4000
A.1.1 A/D Converter
Table A-2 shows some of the important A/D converter specifications. For more details,
refer to the ADC7870 data sheet.
Table A-2. A/D Converter Specifications
Parameter Test Conditions Typ Max
Analog Input Characteristics
Input Capacitance
Input Impedance
Common-Mode
Differential Mode
4 – 9.7 pF
6 M
Ω
7 M
Ω
Static Accuracy
Resolution
Single-Ended Mode
Differential Mode
Integral Linearity
Differential Linearity
11 bits
12 bits
±1 LSB
±0.5 LSB
±2.5 LSB
Dynamic Characteristics
Throughput Rate 52 ksamples/s
Voltage Reference
Accuracy
Buffer Amp Source Current
Buffer Amp Sink Current
Short-Circuit Current
V
ref
= 2.048 V and 2.5 V ±0.05%
20 µA
20 mA
20 mA
±0.25%