General Description

The MAX2037 8-channel variable-gain amplifier (VGA) is designed for high linearity, high dynamic range, and low-noise performance targeting ultrasound imaging and Doppler applications. Each amplifier features differential inputs and outputs and a total gain range of typically 42dB. In addition, the VGAs offer very low output-referred noise performance suitable for interfacing with 12-bit ADCs

Features

♦ 8-Channel Configuration

♦ High Integration for Ultrasound Imaging Applications

♦ Pin Compatible with the MAX2038 Ultrasound VGA Plus CW Doppler Beamformer

♦ Maximum Gain, Gain Range, and Output-Referred Noise Optimized for Interfacing with 12-Bit ADCs Maximum Gain of 29.5dB Total Gain Range of 42dB 22nV/√Hz Ultra-Low Output-Referred Noise at 5MHz Pin-for-Pin 10-Bit Compatibility Supported By MAX2035/MAX2036

♦ ±0.25dB Absolute Gain Error

♦ Switchable Output VGA Clamp Eliminating ADC Overdrive

♦ Fully Differential VGA Outputs for Direct ADC Drive

♦ Variable Gain Range Achieves 42dB Dynamic Range

♦ -70dBc HD2 at VOUT = 1.5VP-P and fIN = 5MHz

♦ Two-Tone Ultrasound-Specific* IMD3 of -52dBc at VOUT = 1.5VP-P and fIN = 5MHz

♦ 120mW Consumption Per Channel