The PCM78P is a low-cost, high-performance 16-bit audio A/D converter. It features fast conversion time, very low THD+N, and a wide input range. The product is suitable for applications such as DSP data acquisition, test instrumentation, digital audio tape, broadcast audio processing, and telecommunications.
The PCM78P is a 16‑bit analog‑to‑digital converter designed for audio and dynamic signal‑processing applications. It offers a fast 4 µs typical conversion time, very low THD+N (‑88 dB typical), and a wide input range of ±3 V. The device includes an internal reference and clock, and provides two selectable serial data formats (BOB or BTC) for flexible interfacing.
Packaged in a 28‑pin plastic DIP, the converter operates from a +5 V to +15 V supply with a power dissipation of about 600 mW. It is specified for temperatures from –25 °C to +85 °C and meets the requirements of DSP data acquisition, test instrumentation, and digital audio tape (DAT) recorders.
| Resolution | 16 Bits |
|---|---|
| Analog Input Range | -3 V to +3 V |
| Input Impedance | 1.5 kΩ |
| Logic Family | TTL Compatible CMOS |
| Conversion Time | 4 µs typical |
| THD+N | -88 dB typical |
| Power Supply Range | +5 V to +15 V |
| Power Dissipation | ≈600 mW |
| Operating Temperature Range | -25 °C to +85 °C |
The PCM78P converts in about 4 µs typical (5 µs max).
It accepts an input range of –3 V to +3 V.
The device can output data in either BOB (binary‑coded) or BTC (two’s‑complement) format, selectable via pin 8.
The converter operates from a +5 V to +15 V supply and dissipates roughly 600 mW.