AD9742 is a 12-bit, 210 MSPS TxDAC® D/A converter that offers high performance, excellent spurious-free dynamic range performance, two data formats (twos complement or straight binary), differential current outputs, low power consumption (135 mW @ 3.3 V), multiple packages (28-lead SOIC, 28-lead TSSOP and 32-lead LFCSP), and is ideal for wideband communication transmit channel, direct IF base stations, wireless local loops, digital radio links, direct digital synthesis (DDS) and instrumentation applications.
The AD9742 is a 12‑bit, high‑speed DAC from Analog Devices, part of the pin‑compatible TxDAC family. It offers a wide dynamic range, low power dissipation (135 mW at 3.3 V) and supports update rates up to 210 MSPS, making it suitable for portable and low‑power communication transmit applications.
The device is available in 28‑lead SOIC, 28‑lead TSSOP, and 32‑lead LFCSP packages and includes an on‑chip 1.2 V band‑gap reference. Detailed electrical specifications, pin configurations, and absolute maximum ratings are provided in the following sections.
| Resolution | 12 Bits |
|---|---|
| Full‑Scale Output Current | 2 – 20 mA |
| Power Dissipation | 135 mW (typical) |
| Supply Voltage (AVDD) | 2.7 – 3.6 V |
| Signal‑to‑Noise Ratio | 70 dB @ 5 MHz, 125 MSPS |
| Maximum Output Update Rate | 210 MSPS |
| Output Settling Time | 11 ns (to 0.1 %) |
| Reference Voltage | 1.14 – 1.26 V (typical 1.20 V) |
| Package Types | 28‑lead SOIC, 28‑lead TSSOP, 32‑lead LFCSP |
The typical power dissipation is 135 mW at a 3.3 V supply.
It is offered in 28‑lead SOIC, 28‑lead TSSOP, and 32‑lead LFCSP packages.
The device can update its output at up to 210 MSPS.
It includes an on‑chip 1.2 V band‑gap reference (1.14 – 1.26 V typical).