PGA870 Series
High-Speed Fully Differential Programmable Gain Amplifier
Manufacturer: Texas Instruments
Catalog
High-Speed Fully Differential Programmable Gain Amplifier
Key Features
• Wideband +5-V Operation: 650-MHz BandwidthLow Impedance, Voltage Mode OutputWide Gain Range: –11.5 dB to +20 dBPrecise 0.5-dB Gain StepsStep-to-Step Gain Error = ±0.03 dBHD2: –93 dBc at 100 MHzHD3: –88 dBc at 100 MHzIMD3: –98 dBc at 100 MHz, –95 dBc at 200 MHzOIP3: +47 dBm at 100 MHz;Exceeds +45 dBm for Frequencies to 300 MHzFlexible Gain Control Interface:Supports latched and unlatched optionsGain may be set in power-down stateFast setup and hold times: 2.5 nsLow Disable Current: 2 mAPb-Free (RoHS-Compliant) and Green PackageAPPLICATIONSProgrammable Gain IF Amplifier:Differential signal chainsSingle-ended to differential conversionFast Gain Control Loops for:Test/measurementDigital radio signal chainsADC Driver for Wireless Base Station Signal Chains: GSM, WCDMA, MC-GSMRadar/Ranging SystemsPowerPAD is a trademark of Texas Instruments.All other trademarks are the property of their respective owners.Wideband +5-V Operation: 650-MHz BandwidthLow Impedance, Voltage Mode OutputWide Gain Range: –11.5 dB to +20 dBPrecise 0.5-dB Gain StepsStep-to-Step Gain Error = ±0.03 dBHD2: –93 dBc at 100 MHzHD3: –88 dBc at 100 MHzIMD3: –98 dBc at 100 MHz, –95 dBc at 200 MHzOIP3: +47 dBm at 100 MHz;Exceeds +45 dBm for Frequencies to 300 MHzFlexible Gain Control Interface:Supports latched and unlatched optionsGain may be set in power-down stateFast setup and hold times: 2.5 nsLow Disable Current: 2 mAPb-Free (RoHS-Compliant) and Green PackageAPPLICATIONSProgrammable Gain IF Amplifier:Differential signal chainsSingle-ended to differential conversionFast Gain Control Loops for:Test/measurementDigital radio signal chainsADC Driver for Wireless Base Station Signal Chains: GSM, WCDMA, MC-GSMRadar/Ranging SystemsPowerPAD is a trademark of Texas Instruments.All other trademarks are the property of their respective owners.
Description
AI
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. In this mode, the quiescent current drops to 2 mA, but the gain control circuitry remains active, allowing the gain of the PGA870 to be set before device power-up. The PGA870 is offered in a QFN-28 PowerPAD™ package.
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. In this mode, the quiescent current drops to 2 mA, but the gain control circuitry remains active, allowing the gain of the PGA870 to be set before device power-up. The PGA870 is offered in a QFN-28 PowerPAD™ package.
