LINEAR LTC2248 14-Bit, 65 Msps Low Power 3V ADC Data Sheet
Summary
This comprehensive technical manual details the high-performance LTC2248/LTC2247/LTC2246 series of 14-bit, low-power Analog-to-Digital Converters (ADCs). Designed for demanding signal processing, these converters feature speeds up to 65Msps and exceptional clarity with high SNR and SFDR. The documentation provides full specifications, wiring diagrams, and performance data critical for system integration. Essential for engineers building sophisticated instrumentation in fields such as wireless broadband communication, medical ultrasound, spectral analysis, and advanced imaging systems.
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LTC2248/LTC2247/LTC2246
14-Bit, 65/40/25Msps Low Power 3V ADCs
FEATURES DESCRIPTIO Sample Rate: 65Msps/40Msps/25Msps The LTC®2248/LTC2247/LTC2246 are 14-bit 65Msps/ Single 3V Supply (2.7V to 3.4V) 40Msps/25Msps, low power 3V A/D converters designed Low Power: 205m W/120m W/75m W for digitizing high frequency, wide dynamic range signals. 74d B SNR up to 70MHz Input The LTC2248/LTC2247/LTC2246 are perfect for demand- 80d B SFDR up to 140MHz Input ing imaging and communications applications with AC No Missing Codes performance that includes 74d B SNR and 80d B SFDR for Flexible Input: 1VP-P to 2VP-P Range signals well beyond the Nyquist frequency. 575MHz Full Power Bandwidth S/H
DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and
Clock Duty Cycle Stabilizer
no missing codes over temperature. The transition noise
Shutdown and Nap Modes
is a low 1LSBRMS.
Pin Compatible Family
80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit) A single 3V supply allows low power operation. A separate 65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit) output supply allows the outputs to drive 0.5V to 3.3V 40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit) logic.
25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit)
A single-ended CLK input controls converter operation. An
10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit)
optional clock duty cycle stabilizer allows high perfor-
32-Pin (5mm × 5mm) QFN Package
mance at full speed for a wide range of clock duty cycles.
SN (d BF S) , LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S Wireless and Wired Broadband Communication Imaging Systems Ultrasound Spectral Analysis Portable Instrumentation
TYPICAL APPLICATIO LTC2248: SNR vs Input Frequency, –1d B, 2V Range, 65Msps
FLEXIBLE REFL REFERENCE
14-BIT
ANALOG CORRECTION OUTPUT
INPUT PIPELINED
INPUT LOGIC DRIVERS
S/H ADC CORE
CLOCK/DUTY CYCLE CONTROL
INPUT FREQUENCY (MHZ)
2249 TAO1b
2249 TA01a
Page Summary Contents For LINEAR LTC2248 14-Bit, 65 Msps Low Power 3V ADC Data Sheet
Manual Details
| Brand | Linear |
|---|---|
| Pages | 20 |
| File Size | 454.80 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What is the typical Signal-to-Noise Ratio (SNR) provided by these ADCs?
They offer a high SNR of 74dB up to a 70MHz input.
Do these converters accommodate different sample rates?
Yes, they are available at three speeds: 65Msps, 40Msps, and 25Msps.
What is the required operational power supply voltage range?
They require a single 3V supply, specifically ranging from 2.7V to 3.4V.
What defines the acceptable analog input voltage window?
The device accepts an Analog Input Voltage Range of 1V to 2V.