High-Speed Fully Differential Programmable Gain Amplifier
Product details
Parameters
Package | Pins | Size
Features
- 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.
Description
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | 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 | Mar. 28, 2017 | |
Technical articles | How to evaluate a transimpedance amplifier (part 2) | Mar. 12, 2014 | |
User guide | TSW3725 Evaluation Module | Oct. 25, 2011 | |
User guide | PGA870EVM User Guide (Rev. A) | Feb. 03, 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
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 of (...)
Features
- Onboard switches for device power-up and power-down, gain setting, and gain latch modes
- SMA connectors for input and output signals and a DB25 connector to allow gain control via an external control source
- An interface board that allows the user to control the PGA870 gain from an external USB (...)
Description
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 (...)
Features
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RHD) | 28 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.