AD9122SCPZ-EP

Overview

The AD9122SCPZ-EP is a dual-channel, 16-bit high dynamic range digital-to-analog converter (DAC) from Analog Devices. It operates at a maximum sample rate of 1130 MSPS and supports multicarrier generation up to the Nyquist frequency. The device features an integrated TxDAC+ architecture with flexible LVDS interfaces for word, byte, or nibble loading. Key electrical parameters include a full-scale output current adjustable between 8.7 mA and 31.7 mA, a typical single-carrier W-CDMA ACLR of 82 dBc at 122.88 MHz IF, and power consumption of 1.5 W at 1.2 GSPS. It utilizes a 72-lead LFCSP package.

Feature Summary

• Enhanced product qualification supporting defense and aerospace applications under AQEC standards
• Military temperature range operation from −55°C to +105°C with controlled manufacturing baseline
• Integrated 1x/2x/4x/8x interpolator and complex modulator for arbitrary carrier placement
• Flexible LVDS interface allowing data bus width reduction to one-half or one-quarter

Applications

• Wireless infrastructure including W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, and LTE
• Digital high or low intermediate frequency (IF) synthesis
• Transmit diversity systems
• Wideband communications such as LMDS/MMDS and point-to-point links

Procurement Notes

Verify that the ordering suffix indicates the enhanced product variant (SCPZ-EP), which ensures compliance with the AQEC standard and military temperature range. Confirm the specific revision level against the latest Analog Devices documentation to ensure alignment with controlled manufacturing baselines and fabrication site requirements.

Selection Notes

Select this component when direct conversion transmit applications require high dynamic range and low noise performance. The internal complex modulator and gain/offset compensation simplify interface design with analog quadrature modulators. Ensure system clocking supports the required interpolation factors to meet bandwidth constraints within the 1130 MSPS limit.

Part Context

This part is the enhanced product (EP) version of the AD9122. While the standard AD9122 offers up to 1230 MSPS, the AD9122-EP is rated for 1130 MSPS but provides extended reliability features. It shares the same functional block diagram and pinout as the commercial grade, differing primarily in environmental ratings and manufacturing controls.

Replacement Considerations

The standard AD9122BCPZ serves as a functional replacement if military temperature range and AQEC compliance are not required. Verify that the higher 1230 MSPS speed of the standard part does not conflict with existing thermal or power budget constraints.