High Current Driver Amplifier and Digital VGA/Preamplifier
Data Sheet
High Current Driver Amplifier and Digital VGA/Preamplifier with 3 dB Steps
AD8260
FEATURES
High current dri...
Description
Data Sheet
High Current Driver Amplifier and Digital VGA/Preamplifier with 3 dB Steps
AD8260
FEATURES
High current driver Differential input—direct drive from DAC Preset gain: 1.5× −3 dB bandwidth: 195 MHz Large output drive: >±300 mA
VGA/preamplifier Low noise Voltage noise: 2.4 nV/√Hz Current noise: 5 pA/√Hz −3 dB bandwidth: 230 MHz Gain range: 30 dB in 3 dB steps −6 dB to +24 dB (for preamplifier gain of 6 dB) Single-ended preamplifier input and differential VGA output
Supplies: 3.3 V to 10 V (with VMID enabled) ±3.3 V to ±5 V (with VMID disabled)
Power: 93 mW with 3.3 V supplies Power-down for VGA, driver amplifier, and system
APPLICATIONS
Digital AGC systems Tx/Rx signal processing Power line transceivers
GENERAL DESCRIPTION
The AD8260 includes a high current driver, usable as a transmitter, and a low noise digitally programmable variable gain amplifier (DGA), useable as a receiver.
The receiver section consists of a single-ended input preamplifier, and linear-in-dB, differential-output DGA. The receiver has a small signal –3 dB bandwidth of 230 MHz; the driver small signal bandwidth is 195 MHz. The driver delivers ±300 mA, well suited for driving low impedance loads, even when connected to a 3.3 V supply.
The AD8260 DGA is ideal for trim applications and has a gain span of 30 dB, in 3 dB steps. Excellent bandwidth uniformity is maintained across the entire frequency range. The low outputreferred noise of the DGA is advantageous in driving high speed ADCs. The differen...
Similar Datasheet