The THS7001 (single) and THS7002 (dual) are high-speed programmable-gain amplifiers, ideal for applications where load impedance can often vary. Each channel on this device consists of a separate low-noise input preamp and a programmable gain amplifier (PGA). The preamp is a voltage-feedback amplifier offering a low 1.7-nV/√Hz voltage noise with a 100-MHz (-3 dB) bandwidth. The output pin of the preamp is accessible so that filters can be easily added to the amplifier.
The 3-bit digitally-controlled PGA provides a -22-dB to 20-dB attenuation/gain range with a 6-dB step resolution. In addition, the PGA provides both high and low output clamp protection to prevent the output signal from swinging outside the common-mode input range of an analog-to-digital converter. The PGA provides a wide 70-MHz (-3 dB) bandwidth, which remains relatively constant over the entire gain/attenuation range. Independent shutdown control is also provided for power conservation and multiplexing. These devices operate over a wide ±4.5-V to ±16-V supply voltage range.
Separate Low Noise Preamp and PGA Stages
Low Voltage Noise...1.7 nV/√Hz
Accessible Output Pin for External Filtering
Voltage Feedback, Gmin = -1, 2
100 MHz Bandwidth (-3 dB)
Digitally Programmable Gain
-22 dB to 20 dB Gain/Attenuation Range
6 dB Step Resolution
Output Clamp Protection
70 MHz Bandwidth (-3 dB)
175 V/µs Slew Rate
Wide Supply Range ±4.5 V to ±16 V
PowerPAD™ Package for Enhanced Thermal Performance