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The AD1139 is a high‑accuracy 18‑bit digital‑to‑analog converter offered by Analog Devices. It features low differential and integral nonlinearity (±½ LSB), a precision internal 10 V reference with a temperature coefficient of ±3 ppm/°C, and programmable output voltage ranges of ±5 V or ±10 V. The device operates from +15 V and +5 V supplies and provides both voltage and current output options.
The datasheet includes detailed specifications, functional block diagrams, wiring and grounding guidelines, calibration procedures, timing requirements, and application notes such as ratiometric DAC testing and IBM PC interfacing. Long‑term stability, burn‑in procedures, and external amplifier options for higher speed or current are also described.
| Resolution | 18 Bits |
|---|---|
| Differential Nonlinearity | +1 LSB max |
| Integral Nonlinearity | +1 LSB max |
| Gain Temperature Coefficient (with Reference) | +4 ppm/°C max |
| Reference Temperature Coefficient | +3 ppm/°C max |
| Settling Time (full‑scale step) | 40 µs to ±0.00019 % |
| Glitch Energy (major carry) | 400 mV × 500 ns |
| Noise (0.1‑10 Hz bandwidth) | 20 pV pk‑pk |
| Power Supply Requirements | +15 V dc and +5 V dc |
| Current Output Range | –1 mA to +0.5 mA |
The AD1139 provides 18‑bit resolution.
The device is pin‑programmable for ±5 V or ±10 V voltage ranges, with both voltage and current output options.
It settles to within ±½ LSB in 40 µs for a full‑scale step.
The internal 10 V reference has a temperature coefficient of ±3 ppm/°C.