General Description
The MAX2036 8-channel variable-gain amplifier (VGA) and programmable octal mixer array 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 50dB (typ). In addition, the VGAs offer very low output-referred noise performance suitable for interfacing with 10-bit ADCs.

Features
♦ 8-Channel Configuration
♦ High Integration for Ultrasound Imaging
   Applications
♦ Pin Compatible with the MAX2035 Ultrasound
   VGA

VGA Features
♦ Maximum Gain, Gain Range, and Output-Referred
   Noise Optimized for Interfacing with 10-Bit ADCs
   Maximum Gain of 39.5dB
   Total Gain Range of 50dB
   60nV/√Hz Ultra-Low Output-Referred Noise at
   5MHz
♦ ±0.5dB Absolute Gain Error
♦ 120mW Consumption per Channel
♦ Switchable Output VGA Clamp Eliminating ADC
   Overdrive
♦ Fully Differential VGA Outputs for Direct ADC
   Drive
♦ Variable Gain Range Achieves 50dB Dynamic
   Range
♦ -62dBc HD2 at VOUT = 1.5VP-P and fIN = 5MHz
♦ Two-Tone Ultrasound-Specific* IMD3 of -52dBc at
   VOUT = 1.5VP-P and fIN = 5MHz

CWD Mixer Features
♦ Low Mixer Noise of -155dBc/Hz at 1kHz Offset
   from 1.25MHz Carrier
♦ Serial-Programmable LO Phase Generator for 4, 8,
   16 LO Quadrature Phase Resolution
♦ Optional Individual Channel 4 x fLO LO Input
   Drive Capability
♦ 269mW Power Consumption per Channel (Normal
   Power Mode) and 226mW Power Consumption
   per Channel (Low-Power Mode)

Applications
   Ultrasound Imaging Sonar