LTC2353-18 - Buffered Dual, 18-Bit, 550ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range
Datasheet Documentation
Application Note
Software and Simulation


Typical Application

LTC2353-18 Typical Application
LTC2353-18 Typical Application


The LTC®2353-18 is an 18-bit, low noise 2-channel simultaneous sampling successive approximation register (SAR) ADC with buffered differential, wide common mode range picoamp inputs. Operating from a 5V low voltage supply, flexible high voltage supplies, and using the internal reference and buffer, both channels of this SoftSpanTM ADC can be independently configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. One channel may also be disabled to increase throughput on the other channel.

The integrated picoamp-input analog buffers, wide input common mode range and 124dB CMRR of the LTC2353-18 allow the ADC to directly digitize a variety of signals using minimal board space and power. This input signal flexibility, combined with ±3.5LSB INL, no missing codes at 18 bits, and 96.4dB SNR, makes the LTC2353-18 an ideal choice for many high voltage applications requiring wide dynamic range.

The LTC2353-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Either one or two lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput.


7mm x 7mm LQFP-48

LTC2353-18 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
LTC2353CLX-18#PBF LQFP 48 C $25.36 $17.75
LTC2353HLX-18#PBF LQFP 48 H $33.50 $23.45
LTC2353ILX-18#PBF LQFP 48 I $27.86 $19.50
LTC2353ILX-16#PBF LQFP 48 I $20.64 $14.45
LTC2353HLX-16#PBF LQFP 48 H $25.64 $17.95
LTC2353CLX-16#PBF LQFP 48 C $18.50 $12.95
* 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
DC2365A-C LTC2353-18 Demo Board | Buffered Dual, 18-Bit, 550ksps Simultaneous Sampling SAR ADC (req DC590, DC2026 or DC890) $150.00
DC2365A-G LTC2353-16 Demo Board | Buffered Dual, 18-Bit, 550ksps Simultaneous Sampling SAR ADC (req DC590, DC2026 or DC890) $150.00