The LTC2656 is a family of octal 16-/12-bit rail-to-rail DACs with a precision integrated reference. The DACs have built-in high performance, rail-to-rail, output buffers and are guaranteed monotonic. The LTC2656-L has a full-scale output of 2.5V with the integrated 10ppm/°C reference and operates from a single 2.7V to 5.5V supply. The LTC2656-H has a full-scale output of 4.096V with the integrated reference and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the DAC full-scale output to two times the external reference voltage.
The LTC2656 is an octal (8‑channel) 16‑/12‑bit rail‑to‑rail DAC with a precision integrated reference. It offers selectable internal or external reference, low crosstalk, power‑on‑reset to zero‑scale or mid‑scale, and operates from a 2.7 V to 5.5 V supply. The device communicates via a SPI/MICROWIRE‑compatible 4‑wire serial interface up to 50 MHz.
The datasheet includes detailed electrical specifications, absolute maximum ratings, package options (TSSOP and QFN), ordering information, typical performance curves, and layout recommendations for analog and digital ground planes. It also describes rail‑to‑rail output considerations and provides typical application guidance.
| Resolution | 16‑/12‑bit |
|---|---|
| Supply Voltage (VCC) | 2.7 V to 5.5 V |
| Maximum INL Error (16‑bit) | ±4 LSB |
| Power‑Supply Rejection | –80 dB |
| Voltage Output Slew Rate | 1.8 V/µs |
The LTC2656 operates from a supply voltage of 2.7 V to 5.5 V.
The maximum integral nonlinearity is ±4 LSB at 16‑bit resolution.
The device is an octal DAC, providing eight independent channels.