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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GENERAL DESCRIPTION
The ADSD-1410S is a functionally complete, dual 14-bit, 10MSPS, sampling A/D converter. Its standard, 40-pin, triple-wide SMT DIP contains two fast-settling sample/hold amplifiers, two 14-bit A/D converters, multiplexed output buffers, a precision reference, and all the timing and control logic necessary to operate from either two or a single start convert pulse.
The ADSD-1410S is optimized for wideband frequencydomain applications and is fully FFT tested. The ADSD- 1410S requires only ±5V supplies and typically consumes 1.6 Watts. The digital output power supply is capable of directly driving 5V or 3V logic systems. Models are available in either commercial 0 to +70°C or military -55 to +125°C operating temperature ranges.

FEATURES
*14-bit resolution; 10MSPS sampling rate
*Functionally complete; ±2.5V input range
*No missing codes over full temperature range
*Edge-triggered
*±5V supplies, 1.6 Watts
*76dB SNR, –83dB THD
*Ideal for both time and frequency domain applications

ADSD-1410S, ADSD-1410S-EX

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