AD9957BSVZ: 1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC
The AD9957 functions as a universal I/Q modulator and agile upconverter for communications systems where cost, size, power consumption, and dynamic performance are critical. The AD9957 integrates a high speed, direct digital synthesizer (DDS), a high performance, high speed, 14-bit digital-to-analog converter (DAC), clock multiplier circuitry, digital filters, and other DSP functions onto a single chip. It provides baseband upconversion for data transmission in a wired or wireless communications system.
The AD9957 is the third offering in a family of quadrature digital upconverters (QDUCs) that includes the AD9857 and AD9856. It offers performance gains in operating speed, power consumption, and spectral performance. Unlike its predecessors, it supports a 16-bit serial input mode for I/Q baseband data. The device can alternatively be programmed to operate either as a single tone, sinusoidal source or as an interpolating DAC.
The reference clock input circuitry includes a crystal oscillator, a high speed, divide-by-two input, and a low noise PLL for multiplication of the reference clock frequency.
The user interface to the control functions includes a serial port easily configured to interface to the SPORT of the Blackfin® DSP and profile pins to enable fast and easy shift keying of any signal parameter (phase, frequency, or amplitude).
产品应用领域 Applications
- HFC data, telephony, and video modems
- Wireless base station transmissions
- Broadband communications transmissions
- Internet telephony
AD9957BSVZ 特点
- 1 GSPS internal clock speed (up to 400 MHz analog output)
- Integrated 1 GSPS 14-bit DAC
- 250 MHz I/Q data throughput rate
- Phase noise ≤ −125 dBc/Hz (400 MHz carrier @ 1 kHz offset)
- Excellent dynamic performance >80 dB narrow-band SFDR
- 8 programmable profiles for shift keying
- Multichip synchronization
- See Data Sheet for Additional Information
AD9957BSVZ 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD9957/PCBZ | 量产 | 评估板 | 100 | 商业 |
| AD9957BSVZ | 量产 | 100 ld TQFP w/ 5mm exposed pad | 100 | 工业 |
| AD9957BSVZ-REEL | 量产 | 100 ld TQFP w/ 5mm exposed pad | 100 | 工业 |
