LTC2122 - Dual14-Bit 170Msps ADC with JESD204B Serial Outputs


  • 6.0Gbps JESD204B Interface
  • Only One Output Lane Required for Both ADCs (FS ≤ 150Msps)
  • 70dBFS SNR
  • 90dBFS SFDR
  • Low Power: 751mW Total
  • Single 1.8V Supply
  • Easy to Drive 1.5VP-P Input Range
  • 1.25GHz Full Power Bandwidth S/H
  • Optional Clock Divide by Two
  • Optional Clock Duty Cycle Stabilizer
  • Low Power Sleep and Nap Modes
  • Serial SPI Port for Configuration
  • 48-Lead (7mm × 7mm) QFN Package

Typical Application

LTC2122 Typical Application
LTC2122 Typical Application


The LTC®2122 is a 2-channel simultaneous sampling 170Msps 14-bit A/D converter with serial JESD204B outputs. It is designed for digitizing high frequency, wide dynamic range signals. It is perfect for demanding communications applications with AC performance that includes 70dBFS SNR and 90dBFS spurious free dynamic range (SFDR). The 1.25GHz input bandwidth allows the ADC to under-sample high frequencies.

The JESD204B serial interface simplifies the PCB design by minimizing the number of data lines required. At 170Msps, only two 3.4Gbps output lanes are required. For sample rates up to 150Msps, both ADCs may share the same output lane at up to 6.0Gbps.

The DEVCLK+ and DEVCLK inputs can be driven differentially with sine wave, PECL, or LVDS signals. An optional clock divide-by-two circuit or clock duty cycle stabilizer maintains high performance at full speed for a wide range of clock duty cycles.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC2122CUK#PBF 7x7 QFN-48 UK C 05-08-1704 Yes
LTC2122CUK#TRPBF 7x7 QFN-48 UK C 05-08-1704 Yes
LTC2122IUK#PBF 7x7 QFN-48 UK I 05-08-1704 Yes
LTC2122IUK#TRPBF 7x7 QFN-48 UK I 05-08-1704 Yes

LTC2122 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC2122CUK#PBF 7x7 QFN-48 C $92.86 $65.00 Yes
LTC2122CUK#TRPBF 7x7 QFN-48 C $92.96 $65.10 Yes
LTC2122IUK#PBF 7x7 QFN-48 I $102.14 $71.50 Yes
LTC2122IUK#TRPBF 7x7 QFN-48 I $102.24 $71.60 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1974A-C LTC2122 Demo Board | 14-bit, 170Msps Dual ADC with JESD204B outputs $250.00
DC2226A-A 4-Channel 14-bit 250Msps JESD204B ADC with Clocking [Featuring LTC2123, LTC6951] $300.00
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Companion Boards

Part Number Description Price Documentation
DC2159A FMC to USB Adapter to Interface with PScope $50.00
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Click here to view our complete list of demo boards


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Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

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