ADF4208: Dual, Integer-N 1.1 GHz/2.0 GHz PLL
The ADF4206/ADF4208 is a dual frequency synthesizer which can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. They consist of a low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a programmable reference divider, programmable A and B counters and a dual-modulus prescaler (P/P+1). The A (6-bit) and B (11- bit) counters, in conjunction with the dual modulus prescaler (P/P+1), implement an N divider (N= BP+A). In addition, the 14-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizers are used with an external loop filter and VCO's (Voltage Controlled Oscillators).
Note: The ADF4207 mentioned in the data sheet is an obsolete part.
ADF4208 特点
- ADF4206: 550 MHz/550 MHz
- ADF4208: 2.0 GHz/1.1 GHz
- 2.7 V to 5.5 V Power Supply
- Selectable Charge Pump Supply (VP) Allows Extended Tuning Voltage in 3 V Systems
- Selectable Charge Pump Currents
- On-Chip Oscillator Circuit
- Selectable Dual Modulus Prescaler
RF2: 32/33 or 64/65
RF1: 32/33 or 64/65 - 3-Wire Serial Interface
- Power-Down Mode
ADF4208 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADF4208BRU | 量产 | 20 ld TSSOP | 20 | 工业 |
| ADF4208BRU-REEL | 量产 | 20 ld TSSOP | 20 | 工业 |
| ADF4208BRU-REEL7 | 量产 | 20 ld TSSOP | 20 | 工业 |
| ADF4208BRUZ | 量产 | 20 ld TSSOP | 20 | 工业 |
| ADF4208BRUZ-R7 | 量产 | 20 ld TSSOP | 20 | 工业 |
| ADF4208BRUZ-RL | 量产 | 20 ld TSSOP | 20 | 工业 |
| EVAL-ADF4208EB1 | 量产 | 评估板 | - | 待定 |
ADF4208 应用技术支持与电子电路设计开发资源下载
- ADF4208 数据手册DataSheet 下载 . PDF
- ADI 模拟器件公司比较器产品选型指南 . PDF
- Analog Devices, Inc. 美国模拟器件公司产品订购手册 .PDF
- 时钟和定时IC产品介绍 . PDF