LTC1401

Features:

Complete 12-Bit ADC with Reference in SO-8
Single Supply 3V Operation
Sample Rate: 200ksps
Power Dissipation: 15mW (Typ)
68dB S/(N + D) and 72dB THD at 50kHz
No Missing Codes Over Temperature
Nap Mode with Instant Wake-Up: 1.5mW
Sleep Mode: 19.5µW
Shutdown Mode: 13.5µW
High Impedance Analog Input
Input Range (0.5mV/LSB): 0V to 2.048V
Internal Reference Can Be Overdriven Externally
3-Wire Interface to DSPs and Processors (SPI and
   MICROWIRE^TM Compatible)


Application

 Low Power and Battery-Operated Systems
Handheld or Portable Instruments
High Speed Data Acquisition
Digital Signal Processing
Multiplexed Data Acquisition Systems
Telecommunication
Digital Radio
Spectrum Analysis


Pinout




Specifications

Supply Voltage (V_CC) ................................................. 7V
Analog Input Voltage (Note 3) ..... 0.3V to (V_CC + 0.3V)
Digital Input Voltage (Note 4) ....................0.3V to 12V
Digital Output Voltage .................. 0.3V to (V_CC + 0.3V)
Power Dissipation .............................................. 300mW
Operating Ambient Temperature Range
    LTC1401C................................................ 0°C to 70°C
    LTC1401I............................................. 40°C to 85°C
Operating Junction Temperature ......................... 125°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C


Description

The LTC^®1401 is a complete 200ksps, 12-bit A/D converter that converts 0V to 2.048V unipolar input and draws only 15mW from a single 3V supply. This easy-to-use device comes complete with a 315ns sample-and-hold and a precision reference. Maximum DC specifications include ±1LSB INL, ±1LSB DNL and 45ppm/°C full-scale drift over temperature.

The LTC1401 has three power saving modes: Nap and Sleep, through the serial interface and Shutdown by setting the SHDN pin to zero. In Nap mode, it consumes only 1.5mW of power and can wake up and convert immediately. In Sleep (Shutdown) mode, it consumes 19.5µW (13.5µW) of power typically. Upon power-up from Sleep or Shutdown mode, a reference ready (REFRDY) signal is available in the serial word to indicate that the reference has settled and the chip is ready to convert.

The 3-wire serial port of LTC1401 allows compact and efficient data transfer to a wide range of microprocessors, microcontrollers and DSPs.