±5V, 1.5Gsps, 8-Bit, Ultra High-Speed, A to D Converter with On-Chip 2.2GHz Track/Hold Amplifier


The MAX108 PECL-compatible, 1.5Gsps, 8-bit ultra high-speed analog-to-digital converter (ADC) allows accurate digitizing of analog signals with bandwidths to 2.2GHz. Fabricated on Maxim's proprietary advanced GST-2 bipolar process, the MAX108 integrates a high-performance track/hold (T/H) amplifier and a quantizer on a single monolithic die.

The innovative design of the internal T/H, which has an exceptionally wide 2.2GHz full-power input bandwidth, results in high performance (typically 7.5 effective bits) at the Nyquist frequency. A fully differential comparator design and decoding circuitry reduce out-of-sequence code errors (thermometer bubbles or sparkle codes) and provide excellent metastable performance. Unlike other ultra high-speed ADCs that can have errors resulting in false full- or zero-scale outputs, the MAX108 limits the error magnitude to 1 LSB.

The analog input is designed for either differential or single-ended use with a ±250mV input voltage range. Dual, differential, positive-referenced emitter-coupled logic (PECL)-compatible output data paths ensure easy interfacing and include an 8:16 demultiplexer feature that reduces output data rates to one-half the sampling clock rate. The PECL outputs can be operated from any supply between +3V to +5V for compatibility with +3.3V or +5V referenced systems. Control inputs are provided for interleaving additional MAX108 devices to increase the effective system sampling rate.

The MAX108 is packaged in a 25mm x 25mm, 192-contact Enhanced Super Ball-Grid Array (ESBGA™) and is specified over the commercial (0°C to +70°C) temperature range. For pin-compatible, lower speed versions of the MAX108, see the MAX104 (1Gsps) and the MAX106 (600Msps) data sheets.
MAX108: Typical Operating Circuit MAX108: Typical Operating Circuit Enlarge+

Key Features

  • 1.5Gsps Conversion Rate
  • 2.2GHz Full-Power Analog Input Bandwidth
  • 7.5 Effective Bits at fIN = 750MHz (Nyquist Frequency)
  • ±0.25 LSB INL and DNL
  • 50Ω Differential Analog Inputs
  • ±250mV Input Signal Range
  • On-Chip, +2.5V Precision Bandgap Voltage Reference
  • Latched, Differential PECL Digital Outputs
  • Selectable 8:16 Demultiplexer
  • Internal Demux Reset Input with Reset Output
  • 192-Contact ESBGA Package
  • Pin Compatible with MAX104 (1Gsps) and MAX106 (600Msps)


  • Automated Test Equipment (ATE)
  • Digital Oscilloscopes
  • Digital RF/IF Signal Processing
  • Direct RF Downconversion
  • High-Energy Physics
  • High-Speed Data Acquisition
  • Radar/ECM Systems
Part Number Input Chan. Resolution
Sample Rate
AC Specs
Full Pwr. BW
Data Bus Interface
max ≥ @ fIN min min min typ
MAX108  1 8 1500 125 61.6 7.71 47.2 47.4 -60.2 0.25 0.25 2200 1078
See All High-Speed ADCs (> 5Msps) (73)
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.

MAX104EVKIT: Evaluation Kit for the MAX104, MAX106, and MAX108
MAX106EVKIT: Evaluation Kit for the MAX104, MAX106, and MAX108
MAX108EVKIT: Evaluation Kit for the MAX104, MAX106, and MAX108

Technical Documents

Tutorial 810 Understanding Flash ADCs
App Note 642 ADC Captures 1Gsps
Tutorial 283 INL/DNL Measurements for High-Speed Analog-to-Digital Converters (ADCs)

Quality and Environmental Data

Product Reliability Reports: MAX108.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Related Resources

24-Bit, 6-Channel, 64ksps, 6.2nV/ PGA, Delta-Sigma ADC with SPI Interface

  • High Resolution for Industrial Applications that Require a Wide Dynamic Range
  • Longer Battery Life for Portable Applications
  • Single or Split Analog Supplies Provide Input Voltage Range Flexibility

16-Bit, 1Msps, Low-Power, Fully Differential SAR ADC

  • High DC/AC Accuracy Improves Measurement Quality
  • Highly Integrated ADC Saves Cost and Space
  • Wide Supply Range and Low Power Simplify Power-Supply Design

20-Bit, 1Msps, Low-Power, Fully Differential SAR ADC

  • High DC/AC Accuracy Provides Better Measurement Quality
  • High Sampling Rate SAR Architecture Enables Fast Settling and Acquisition
  • Integration Simplifies Design