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

Please check latest availability status for a specific part variant.


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.
MAX1438: Functional Diagram MAX1438: Functional Diagram Enlarge+

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)


  • Instrumentation
  • Multichannel Communications
  • Ultrasound and Medical Imaging

See parametric specs for High-Speed ADCs (> 5Msps) (49)

Part NumberInput ChannelsResolution
Sample Rate
AC Specs
Full Pwr. BW
Data Bus InterfacePackage/Pins
max@ fINminminmintyp
MAX1438 8126519.39011.469.669.6-920.250.4100507Serial LVDS

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX1434EVKIT: Evaluation Kit for the MAX1434, MAX1436, MAX1437, and MAX1438
MAX1436EVKIT: Evaluation Kit for the MAX1434, MAX1436, MAX1437, and MAX1438
MAX1437EVKIT: Evaluation Kit for the MAX1434, MAX1436, MAX1437, and MAX1438
MAX1438EVKIT: Evaluation Kit for the MAX1434, MAX1436, MAX1437, and MAX1438

Technical Documents

App Note 3190 Coherent Sampling Calculator (CSC)
Product Reliability Reports: MAX1438.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources