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PGA870

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High-Speed Fully Differential Programmable Gain Amplifier

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Data sheet

PGA870

ACTIVE
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Product details

PGA/VGA PGA Number of channels 1 Vs (min) (V) 4.75 Vs (max) (V) 5.25 Input type Differential Output type Differential Interface type Digital Gain Set BW at Acl (MHz) 650 Acl, min spec gain (V/V) 0.27 Voltage gain (min) (V/V) 0.27 Voltage gain (max) (V/V) 10 Gain (max) (dB) 20 Architecture Fully Differential ADC Driver Features Shutdown, Single-ended to Differential conversion Vos (offset voltage at 25°C) (typ) (mV) 5 Input voltage noise (typ) (µV√Hz) 0.03 Slew rate (typ) (V/µs) 2900 Iq per channel (typ) (mA) 143 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA PGA Number of channels 1 Vs (min) (V) 4.75 Vs (max) (V) 5.25 Input type Differential Output type Differential Interface type Digital Gain Set BW at Acl (MHz) 650 Acl, min spec gain (V/V) 0.27 Voltage gain (min) (V/V) 0.27 Voltage gain (max) (V/V) 10 Gain (max) (dB) 20 Architecture Fully Differential ADC Driver Features Shutdown, Single-ended to Differential conversion Vos (offset voltage at 25°C) (typ) (mV) 5 Input voltage noise (typ) (µV√Hz) 0.03 Slew rate (typ) (V/µs) 2900 Iq per channel (typ) (mA) 143 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RHD) 28 25 mm² (5 mm × 5 mm)
  • 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
      • Digital radio signal chains
    • ADC Driver for Wireless Base Station Signal Chains: GSM, WCDMA, MC-GSM
    • Radar/Ranging Systems

    PowerPAD is a trademark of Texas Instruments.
    All other trademarks are the property of their respective owners.
  • 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
      • Digital radio signal chains
    • ADC Driver for Wireless Base Station Signal Chains: GSM, WCDMA, MC-GSM
    • Radar/Ranging Systems

    PowerPAD is a trademark of Texas Instruments.
    All other trademarks are the property of their respective owners.

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.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet High-Speed, Fully Differential, Programmable Gain Amplifier datasheet (Rev. A) Feb 15, 2011
E-book The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML Mar 28, 2017
User guide TSW3725 Evaluation Module Oct 25, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

PGA870EVM — PGA870 evaluation module

The The PGA870EVM is an evaluation module (EVM) for the PGA870 wideband programmable gain amplifier (PGA) for high-speed signal chain and data acquisition systems.

The PGA870EVM allows for evaluation of all aspects of the PGA870 device. Complete circuit descriptions, schematic diagrams, and a bill (...)

User guide: PDF
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Evaluation board

TSW3085EVM — Wideband Transmit Signal Chain Evaluation Board and Reference Design

The TSW3085 Evalutaion Module is a circuit board that allows system designers to evaluate the combined performance of Texas Instruments' transmit signal chain with the LMK04806B (formally National Semiconductor) low noise clock generator/jitter cleaner. For ease of use as a complete RF transmit (...)

User guide: PDF
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Simulation model

PGA870 PSpice Model (Rev. A)

SLOM170A.ZIP (80 KB) - PSpice model
Supported products & hardware
Simulation model

PGA870 TINA-TI Reference Design

SLOM168.TSC (115 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

PGA870 TINA-TI Spice Model

SLOM169.ZIP (65 KB) - TINA-TI Spice model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
VQFN (RHD) 28 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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