DESCRIPTION
The LTC®2238/LTC2237/LTC2236 are 10-bit 65Msps/40Msps/25Msps, low power 3V A/D converters designed for digitizing high frequency, wide dynamic range signals. The LTC2238/LTC2237/LTC2236 are perfect for demanding imaging and communications applications with AC performance that includes 61.8dB SNR and 85dB SFDR for signals at the Nyquist frequency.
DC specs include ±0.1LSB INL (typ), ±0.05LSB DNL (typ) and ±0.5LSB INL, ±0.5LSB DNL over temperature. The transition noise is a low 0.07LSBRMS.
A single 3V supply allows low power operation. A separate output supply allows the outputs to drive 0.5V to 3.6V logic.
A single-ended CLK input controls converter operation. An optional clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles.

FEATURES
*Sample Rate: 65Msps/40Msps/25Msps
*Single 3V Supply (2.7V to 3.4V)
*Low Power: 205mW/120mW/75mW
*61.8dB SNR
*85dB SFDR
*No Missing Codes
*Flexible Input: 1VP-P to 2VP-P Range
*575MHz Full Power Bandwidth S/H
*Clock Duty Cycle Stabilizer
*Shutdown and Nap Modes
*Pin Compatible Family:
-125Msps: LTC2251 (10-Bit), LTC2253 (12-Bit)
-105Msps: LTC2250 (10-Bit), LTC2252 (12-Bit)
-80Msps: LTC2239 (10-Bit), LTC2229 (12-Bit)
-65Msps: LTC2238 (10-Bit), LTC2228 (12-Bit)
-40Msps: LTC2237 (10-Bit), LTC2227 (12-Bit)
-25Msps: LTC2236 (10-Bit), LTC2226 (12-Bit)
*32-Pin (5mm × 5mm) QFN Package

APPLICATIOUNS
*Wireless and Wired Broadband Communication
*Imaging Systems
*Ultrasound
*Spectral Analysis
*Portable Instrumentation

LTC2238CUH, LTC2238IUH, LTC2237CUH, LTC2237IUH, LTC2236CUH, LTC2236IUH

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DESCRIPTION
The LTC®2355-12/LTC2355-14 are 12-bit/14-bit, 3.5Msps serial ADCs with differential inputs. The devices draw only 5.5mA from a single 3.3V supply and come in a tiny 10-lead MSOP package. A Sleep shutdown feature further reduces power consumption to 13µW. The combination of speed, low power and tiny package makes the LTC2355-12/LTC2355-14 suitable for high speed, portable applications.
The 80dB common mode rejection allows users to eliminate ground loops and common mode noise by measuring signals differentially from the source. The devices convert 0V to 2.5V unipolar inputs differentially.
The absolute voltage swing for AIN+ and AIN– extends from ground to the supply voltage.
The serial interface sends out the conversion results during the 16 clock cycles following a CONV rising edge for compatibility with standard serial interfaces. If two additional clock cycles for acquisition time are allowed after the data stream in between conversions, the full sampling rate of 3.5Msps can be achieved with a 63MHz clock.

FEATURES
*3.5Msps Conversion Rate
*74.2dB SINAD at 14-Bits, 71.1dB SINAD at 12-Bits
*Low Power Dissipation: 18mW
*3.3V Single Supply Operation
*2.5V Internal Bandgap Reference can be Overdriven
*3-Wire SPI-Compatible Serial Interface
*Sleep (13µW) Shutdown Mode
*Nap (4mW) Shutdown Mode
*80dB Common Mode Rejection
*0V to 2.5V Unipolar Input Range
*Tiny 10-Lead MSOP Package

APPLICATIOUS
*Communications
*Data Acquisition Systems
*Uninterrupted Power Supplies
*Multiphase Motor Control
*Multiplexed Data Acquisition
*RFID

LTC2355CMSE-12, LTC2355IMSE-12, LTC2355CMSE-14, LTC2355IMSE-14

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