Overview
The AD9125BCPZ from Analog Devices Inc. is a dual, 16-bit, high dynamic range TxDAC+® digital-to-analog converter (DAC). It operates at a sample rate of 1000 MSPS, enabling multicarrier generation up to the Nyquist frequency. This DAC is optimized for direct conversion transmit applications, including complex digital modulation and gain and offset compensation. The device features a 4-wire serial port interface for programming and readback of internal parameters and is packaged in a 72-lead Lead Frame Chip Scale Package (LFCSP).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Sample Rate | - | - | 1000 | MSPS |
| Resolution | - | - | 16-bit | - |
| Full-Scale Output Current | 8.7 | - | 31.7 | mA |
| Power Consumption | - | - | 900 | mW (at 500 MSPS) |
| Package Type | - | - | 72-lead LFCSP | - |
| Spurious-Free Dynamic Range (SFDR) | - | - | 78 dBc (at fDAC = 100 MSPS, fOUT = 20 MHz) | - |
| Latency (DACCLK Cycles) | 64 | - | 608 | Cycles (depending on interpolation) |
| Power-Up Time | - | - | 260 | ms |
Key Features
- Ultralow noise and intermodulation distortion (IMD) for high-quality synthesis of wideband signals from baseband to high intermediate frequencies.
- A proprietary DAC output switching technique enhances dynamic performance.
- Current outputs are easily configured for various single-ended or differential circuit topologies.
- A flexible CMOS digital interface allows the standard 32-wire bus to be reduced to a 16-wire bus.
- Gain and phase adjustment for sideband suppression.
- High performance, low noise PLL clock multiplier.
- Digital inverse sinc filter.
- Novel 2×/4×/8× interpolator/complex modulator allows carrier placement anywhere in the DAC bandwidth.
- Multichip synchronization interface.
Applications
- Wireless infrastructure: W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, LTE.
- Digital high or low IF synthesis.
- Transmit diversity.
- Wideband communications: LMDS/MMDS, point-to-point.
- Cable modem termination systems.
Q & A
- What is the sample rate of the AD9125BCPZ? The AD9125BCPZ operates at a sample rate of 1000 MSPS.
- What is the resolution of the AD9125BCPZ? The AD9125BCPZ is a 16-bit DAC.
- What is the range of the full-scale output current for the AD9125BCPZ? The full-scale output current can be programmed over a range of 8.7 mA to 31.7 mA.
- What is the typical power consumption of the AD9125BCPZ at 500 MSPS? The typical power consumption is 900 mW at 500 MSPS.
- What type of package does the AD9125BCPZ come in? The AD9125BCPZ comes in a 72-lead Lead Frame Chip Scale Package (LFCSP).
- What are some key applications of the AD9125BCPZ? Key applications include wireless infrastructure, digital high or low IF synthesis, transmit diversity, wideband communications, and cable modem termination systems.
- How does the AD9125BCPZ enhance dynamic performance? The AD9125BCPZ uses a proprietary DAC output switching technique to enhance dynamic performance.
- What is the latency of the AD9125BCPZ? The latency varies from 64 to 608 DACCLK cycles depending on the interpolation mode.
- How long does it take for the AD9125BCPZ to power up? The power-up time is approximately 260 ms.
- Can the AD9125BCPZ be used with analog quadrature modulators? Yes, the DAC outputs are optimized to interface seamlessly with analog quadrature modulators such as the ADL537x F-MOD series from Analog Devices, Inc..
