7.6 Bit, 1/2/4 Channel, 5/2.5/1.25 GSPS, Analog-to-Digital Converter (ADC)


Product details


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  • 10 Lane High Speed Serial Data Output
  • Serial Interface for Extended Control
  • Adjustment of Input Full-Scale Range and Offset
  • Duty Cycle Corrected Sample Clock
  • Multiple Test Patterns
  • Dual +1.2V ±0.06V and 2.5V ±0.125V Operation

Key Specifications

  • Average Output Word Size: 7.6 bits
  • Max Conversion Rate: 1.25/2.5/5.0 GSPS (min)
  • Error Rate: 10−18 (typ)
  • ENOB @ 998 MHz Input: 6.4 Bits (typ)
  • SNR @ 998 MHz: 41 dB (typ)
  • Full Power Bandwidth (-3dB) Dual Mode: 1.2 GHz (typ)
  • Power Consumption
    • Operating: 3.0 W (typ)
    • Power Down Mode: 60 mW (typ)

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The LM97600 is a single/dual/quad, low power, high performance SiGe BiCMOS analog-to-digital converter that digitizes signals at sampling rates up to 5.0/2.5/1.25 GSPS. Consuming a typical 3.1 Watts at 5 GSPS from 1.2 and 2.5 Volt dual supplies, this device is ensured to have no missing codes over the full operating temperature range. The unique folding and interpolating architecture, the fully differential comparator design, the innovative design of the internal sample-and-hold amplifier and the self-calibration scheme enable an excellent response of all dynamic parameters, producing a high 6.6 Effective Number Of Bits, (ENOB) with a 248 MHz input signal and a 5 GHz sample rate. The LM97600 achieves a 5 GSPS sampling rate by utilizing both the rising and falling edge of a 2.5 GHz input clock. Data encoding is 8 bits offset binary. Average output word size is 7.6 bits. The serialized data is 8b10b encoded providing DC balance and AC coupling capability. Decoding can be accomplished using existing FPGA serial I/O modules.

The converter typically consumes less than 65 mW in the Power Down Mode and is available in a 292 ball, thermally enhanced substrate BGA, and operates over the Industrial (-40°C ≤ TA ≤ +85°C) ambient temperature range.

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Technical documentation

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Type Title Date
* Datasheet LM97600 7.6-Bit, 1/2/4 Chan, 5/2.5/1.25 GSPS, Hi Perf, Low Pwr A/C Conv datasheet (Rev. A) Mar. 14, 2013
Technical articles Keys to quick success using high-speed data converters Oct. 13, 2020
Technical articles How to achieve fast frequency hopping Mar. 03, 2019
Technical articles RF sampling: Learning more about latency Feb. 09, 2017
Technical articles Why phase noise matters in RF sampling converters Nov. 28, 2016
User guides LM97600RB Reference Board Users’ Guide Jul. 25, 2012

Design & development

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Hardware development

document-generic User guide

The LM97600RB demonstrates a high-performance signal acquisition sub-system that provides an average output word size of 7.6 bits, and corresponding SNR and dynamic range on one to four channels at signal frequencies in excess of 1.0 GHz. Sampling rates of up to 1.25 GSPS on 4 inputs, 2.5 GSPS on 2 (...)

  • Demonstrates the LM97600's typical dynamic performance – see the datasheet for full details.
  • Quad channel sample rates of up to 1.25 GS/s (limited by the ADC specifications and the FPGA capture limitations)
  • Dual channel sample rates of up to 2.5 GS/s (limited by the ADC specifications and the FPGA (...)

Design tools & simulation

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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
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  • Supports simultaneous analysis of multiple products
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