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MAX1438：Octal, 12-Bit, 65Msps, 1.8V ADC with Serial LVDS Outputs

The MAX1438 octal, 12-bit analog-to-digital converter (ADC) features fully differential inputs, a pipelined architecture, and digital error correction incorporating a fully differential signal path. This ADC is optimized for low-power and high-dynamic performance in medical imaging instrumentation and digital communications applications. The MAX1438 operates from a 1.8V single supply and consumes only 913mW (114mW per channel) while delivering a 69.9dB (typ) signal-to-noise ratio (SNR) at a 5.3MHz input frequency. In addition to low operating power, the MAX1438 features a power-down mode for idle periods. An internal 1.24V precision bandgap reference sets the full-scale range of the ADC. A flexible reference structure allows the use of an external reference for applications requiring increased accuracy or a different input voltage range. The reference architecture is optimized for low noise. A single-ended clock controls the data-conversion process. An internal duty-cycle equalizer compensates for wide variations in clock duty cycle. An on-chip PLL generates the high-speed serial low-voltage differential signal (LVDS) clock. The MAX1438 has self-aligned serial LVDS outputs for data, clock, and frame-alignment signals. The output data is presented in two's complement or binary format. The MAX1438 offers a maximum sample rate of 65Msps. See the Pin-Compatible Versions table in the full data sheet for lower-speed versions. This device is available in a small, 14mm x 14mm x 1mm, 100-pin TQFP package with exposed pad and is specified for the extended industrial (-40°C to +85°C) temperature range.

Key Features Excellent Dynamic Performance 69.9dB SNR at 5.3MHz 95dBc SFDR at 5.3MHz 85dB Channel Isolation Ultra-Low Power 114mW per Channel (Normal Operation) Serial LVDS Outputs Pin-Selectable LVDS/SLVS (Scalable Low-Voltage Signal) Mode LVDS Outputs Support Up to 30 Inches FR-4 Backplane Connections Test Mode for Digital Signal Integrity Fully Differential Analog Inputs Wide Differential Input Voltage Range (1.4VP-P) On-Chip 1.24V Precision Bandgap Reference Clock Duty-Cycle Equalizer Compact, 100-Pin TQFP Package with Exposed Pad Evaluation Kit Available (Order MAX1438EVKIT)

MAX1438: Functional Diagram Applications/Uses Instrumentation Multichannel Communications Ultrasound and Medical Imaging

DataSheet

Parametrics

Design kits & evaluation modules

• MAX1434EVKIT
• MAX1436EVKIT
• MAX1437EVKIT
• MAX1438EVKIT

Quality and Environmental Data

• MAX1438.pdf

Related Products

• MAX1436B：Octal, 12-Bit, 40Msps, 1.8V ADC with Serial LVDS Outputs
• MAX1437：Octal, 12-Bit, 50Msps, 1.8V ADC with Serial LVDS Outputs
• MAX1436：Octal, 12-Bit, 40Msps, 1.8V ADC with Serial LVDS Outputs
• MAX1434：Octal, 10-Bit, 50Msps, 1.8V ADC with Serial LVDS Outputs

Ordering Information