AD9957 Rev. A is a 1 GSPS quadrature digital upconverter with 18-bit I/Q data path and 14-bit DAC from Analog Devices. The internal clock speed is up to 1 GSPS and the analog output can reach up to 400 MHz.
The AD9957 is a 1 GSPS quadrature digital upconverter that integrates a high‑speed DDS, a 14‑bit DAC, clock multiplier, digital filters and other DSP functions on a single chip. It supports I/Q data rates up to 250 MHz, offers programmable profiles for shift keying, and can operate as a single‑tone source, interpolating DAC, or multichip‑synchronized device.
The document provides a functional block diagram, pin configuration, electrical specifications, absolute maximum ratings, and timing characteristics. It also lists recommended power supplies (1.8 V and 3.3 V), package details (100‑lead TQFP_EP), and typical application areas such as wireless base stations, broadband communications, and Internet telephony.
| Internal clock speed | 1 GSPS |
|---|---|
| DAC resolution | 14‑bit |
| Power supply voltages | 1.8 V and 3.3 V |
| Package type | 100‑lead TQFP_EP |
| Full‑scale output current | 8.6 – 31.6 mA |
| Operating temperature range | -40 °C to +85 °C |
| Maximum SCLK frequency (serial port) | 70 Mbps |
| Logic high input voltage | 2.0 V |
The AD9957 can operate with an internal clock speed of up to 1 GSPS.
The device requires both 1.8 V and 3.3 V power supplies.
The maximum SCLK frequency is 70 Mbps.
It operates from –40 °C up to +85 °C.