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MAX2036CCQ+TD Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX2036CCQ+TD Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 25 page 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 per- formance 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. The MAX2036 VGA is optimized for less than ±0.5dB absolute gain error to ensure minimal channel-to-channel ultrasound beamforming focus error. The device’s differ- ential outputs are designed to directly drive ultrasound ADCs through an external passive anti-aliasing filter. A switchable clamp is also provided at each amplifier’s output to limit the output signals, thereby preventing ADC overdrive or saturation. Dynamic performance of the device is optimized to reduce distortion to support second-harmonic imaging. The device achieves a second-harmonic distortion specification of -62dBc at VOUT = 1.5VP-P and fIN = 5MHz, and an ultrasound-specific* two-tone third-order intermodulation distortion specification of -52dBc at VOUT = 1.5VP-P and fIN = 5MHz. The MAX2036 also integrates an octal quadrature mixer array and programmable LO phase generators for a complete CW beamforming solution. The LO phase selection for each channel can be programmed using a digital serial interface and a single high-frequency clock or the LOs for each complex mixer pair can be directly driven using separate 4 x LO clocks. The serial interface is designed to allow multiple devices to be easily daisy-chained in order to minimize program inter- face wiring. The LO phase dividers can be pro- grammed to allow 4, 8, or 16 quadrature phases. The input path of each CW mixer consists of a selectable lowpass filter for optimal CWD noise performance. The outputs of the mixers are summed into I and Q differen- tial current outputs. The mixers and LO generators are designed to have exceptionally low noise performance of -155dBc/Hz at 1kHz offset from a 1.25MHz carrier. The MAX2036 operates from a +5.0V power supply, consuming only 120mW/channel in VGA mode and 269mW/channel in normal power CW mode. A low- power CW mode is also available and consumes only 226mW/channel. The device is available in a lead-free 100-pin TQFP package (14mm x 14mm) with an exposed pad. Electrical performance is guaranteed over a 0°C to +70°C temperature range. Applications Ultrasound Imaging Sonar Features o 8-Channel Configuration o High Integration for Ultrasound Imaging Applications o Pin Compatible with the MAX2035 Ultrasound VGA VGA Features o 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 o ±0.5dB Absolute Gain Error o 120mW Consumption per Channel o Switchable Output VGA Clamp Eliminating ADC Overdrive o Fully Differential VGA Outputs for Direct ADC Drive o Variable Gain Range Achieves 50dB Dynamic Range o -62dBc HD2 at VOUT = 1.5VP-P and fIN = 5MHz o Two-Tone Ultrasound-Specific* IMD3 of -52dBc at VOUT = 1.5VP-P and fIN = 5MHz CWD Mixer Features o Low Mixer Noise of -155dBc/Hz at 1kHz Offset from 1.25MHz Carrier o Serial-Programmable LO Phase Generator for 4, 8, 16 LO Quadrature Phase Resolution o Optional Individual Channel 4 x fLO LO Input Drive Capability o 269mW Power Consumption per Channel (Normal Power Mode) and 226mW Power Consumption per Channel (Low-Power Mode) o CWD Implementation Is Fully Compliant with All Patents Related to Ultrasound Imaging Techniques Ultrasound VGA Integrated with CW Octal Mixer ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-4420; Rev 1; 6/09 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. + Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. D = Dry packing. †EP = Exposed pad. PART TEMP RANGE PIN-PACKAGE MAX2036CCQ+D 0 °C to +70°C 100 TQFP-EP† MAX2036CCQ+TD 0 °C to +70°C 100 TQFP-EP† Pin Configuration appears at end of data sheet. * See the Ultrasound-Specific IMD3 Specification in the Applications Information section. EVALUATION KIT AVAILABLE |
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