LTC2257-12

PRODUCTION

12-Bit, 40Msps Ultralow Power 1.8V ADCs

Analog Devices LTC2257-12 Product Info

10 February 2026 5

Features

71.1dB SNR
88dB SFDR
Low Power: 79mW/47mW/34mW
Single 1.8V Supply
CMOS, DDR CMOS or DDR LVDS Outputs
Selectable Input Ranges: 1V_P-P to 2V_P-P
800MHz Full-Power Bandwidth S/H

Optional Data Output Randomizer
Optional Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
Serial SPI Port for Configuration
Pin Compatible 14-Bit and 12-Bit Versions
40-Pin (6mm × 6mm) QFN Package

Part details & applications

The LTC2258-12/LTC2257-12/LTC2256-12 are sampling 12-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. They are perfect for demanding communications applications with AC performance that includes 71.1dB SNR and 88dB spurious free dynamic range (SFDR). Ultralow jitter of 0.17ps_RMS allows undersampling of IF frequencies with excellent noise performance.

DC specs include ±0.3LSB INL (typical), ±0.1LSB DNL (typical) and no missing codes over temperature. The transition noise is a low 0.3LSB_RMS.

The digital outputs can be either full rate CMOS, double data rate CMOS, or double data rate LVDS. A separate output power supply allows the CMOS output swing to range from 1.2V to 1.8V.

The ENC⁺ and ENC^– inputs may be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles.


	Bits
LTC2257-12	12
LTC2257-14	14

Applications

Communic

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