• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The PGA870 is a wideband programmable-gain amplifier (PGA) for high-speed signal chain and data acquisition systems. The PGA870 has been optimized to provide high bandwidth, low distortion, and low noise, making it ideally suited as a 14-bit analog-to-digital converter (ADC) driver for wireless base station signal chain applications. The wide gain range of –11.5 dB to +20 dB can be adjusted in 0.5-dB gain steps through a 6-bit control word applied to the parallel interface. The gain control interface may be configured as a level-triggered latch or an edge-triggered latch, or it may be placed in an unlatched (transparent) mode. In addition to the 6-bit gain control, the PGA870 contains a power-down pin (PD) that can be used to put the device into a low-current, power-down mode.

特性

• Wideband +5-V Operation: 650-MHz Bandwidth
• Low Impedance, Voltage Mode Output
• Wide Gain Range: –11.5 dB to +20 dB
• Precise 0.5-dB Gain Steps
  Step-to-Step Gain Error = ±0.03 dB
• HD₂: –93 dBc at 100 MHz
• HD₃: –88 dBc at 100 MHz
• IMD₃: –98 dBc at 100 MHz, –95 dBc at 200 MHz
• OIP3: +47 dBm at 100 MHz;
  Exceeds +45 dBm for Frequencies to 300 MHz
• Flexible Gain Control Interface:
  • Supports latched and unlatched options
  • Gain may be set in power-down state
  • Fast setup and hold times: 2.5 ns
• Low Disable Current: 2 mA
• Pb-Free (RoHS-Compliant) and Green Package
• APPLICATIONS
  • Programmable Gain IF Amplifier:
    • Differential signal chains
    • Single-ended to differential conversion
  • Fast Gain Control Loops for:
    • Test/measurement