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Chapter 5
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 | ADS7800 or equivalent |
Resolution | 12 bits |
Number of channels | 16 |
Input ranges | ±10 V, ±5 V, ±2.5 V, ±1.25 V, 0 to 10 V, 0 to 5V, 0 to 2.5 V, 0 to 1.25 V software |
| programmable |
A/D pacing | Internal counter - 82C54. |
(software programmable) | External source (A/D External Pacer) |
| software programmable for rising or falling edge |
| Software polled |
A/D trigger sources | External edge trigger (A/D EXTERNAL TRIGGER) |
A/D triggering modes | Rising edge trigger |
A/D | Unlimited pre- and |
| 512. |
Burst mode | Software selectable option, burst rate = 150 kHz |
Data transfer | From 1024 sample FIFO via REPINSW |
| Programmed I/O |
A/D conversion time | 3 µs max |
Analog front end settling time | 6 µs for a full scale step to 1 LSB |
Calibrated throughput | 200 kHz |
Calibration | |
A/D | ±0.25 LSB/°C max |
A/D zero drift | ±0.25 LSB/°C max |
Common mode range | ±10 V min |
CMRR @ 60 Hz | |
Input leakage current | ±20 nA max |
Input impedance | 10 MOhms min |
Absolute maximum input | ±35 volts |
voltage |
|
15 minutes |
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