LTC1400 Complete SO-8, 12-Bit, 400ksps ADC with Shutdown FEATURES DESCRIPTIO Complete 12-Bit ADC in SO-8 The LTC 1400 is a complete 400ksps, 12-bit A/D converter Single Supply 5V or 5V Operation which draws only 75mW from 5V or 5V supplies. This Sample Rate: 400ksps easy-to-use device comes complete with a 200ns sample- Power Dissipation: 75mW (Typ) and-hold and a precision reference. Unipolar and bipolar 72dB S/(N + D) and 80dB THD at Nyquist conversion modes add to the exibility of the ADC. The No Missing Codes over Temperature LTC1400 has two power saving modes: Nap and Sleep. Nap Mode with Instant Wake-Up: 6mW In Nap mode, it consumes only 6mW of power and can Sleep Mode: 30W wake up and convert immediately. In the Sleep mode, it High Impedance Analog Input consumes 30W of power typically. Upon power-up from Input Range (1mV/LSB): 0V to 4.096V or 2.048V Sleep mode, a reference ready (REFRDY) signal is available Internal Reference Can Be Overdriven Externally in the serial data word to indicate that the reference has 3-Wire Interface to DSPs and Processors (SPI and settled and the chip is ready to convert. TM MICROWIRE Compatible) The LTC1400 converts 0V to 4.096V unipolar inputs from U a single 5V supply and 2.048V bipolar inputs from 5V APPLICATIO S supplies. Maximum DC specs include 1LSB INL, 1LSB DNL and 45ppm/C drift over temperature. Guaranteed AC High Speed Data Acquisition performance includes 70dB S/(N + D) and 76dB THD at Digital Signal Processing an input frequency of 100kHz, over temperature. Multiplexed Data Acquisition Systems Audio and Telecom Processing The 3-wire serial port allows compact and efcient data Digital Radio transfer to a wide range of microprocessors, microcon- Spectrum Analysis trollers and DSPs. Low Power and Battery-Operated Systems , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Handheld or Portable Instruments All other trademarks are the property of their respective owners. TYPICAL APPLICATIO Single 5V Supply, 400kHz, 12-Bit Sampling A/D Converter Power Consumption vs Sample Rate 100 NORMAL CONVERSION 5V 10 V V NAP MODE CC SS + BETWEEN CONVERSION 10 F 0.1 F 1 MPU LTC1400 SLEEP AND NAP MODE ANALOG INPUT A CONV P1.4 IN 0.1 BETWEEN CONVERSION (0V TO 4.096V) SLEEP MODE BETWEEN V 2.42V REF CLK P1.3 REF OUT CONVERSION + 0.01 GND D P1.2 10 F 0.1 F OUT SERIAL 6.4MHz CLOCK DATA LINK 0.001 1400 TA01 0.01 0.1 1 10 100 1k 10k 100k 1M SAMPLE RATE (Hz) 1400 TA02 1400fa 1 SUPPLY CURRENT (mA) U ULTC1400 U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1, 2) TOP VIEW Supply Voltage (V ) ..................................................7V CC V 1 8 V CC SS Negative Supply Voltage (V ) ..................... 6V to GND SS A CONV 2 7 IN Total Supply Voltage (V to V ) CC SS V CLK REF 3 6 Bipolar Operation Only ..........................................12V GND D 4 5 OUT Analog Input Voltage (Note 3) S8 PACKAGE Unipolar Operation ....................0.3V to (V + 0.3V) CC 8-LEAD PLASTIC SO Bipolar Operation ........... (V 0.3V) to (V + 0.3V) SS CC T = 150C, = 130C/W JMAX JA Digital Input Voltage (Note 4) ORDER PART NUMBER S8 PART MARKING Unipolar Operation ................................. 0.3V to 12V Bipolar Operation .........................(V 0.3V) to 12V SS LTC1400CS8 1400 Digital Output Voltage LTC1400IS8 1400I Unipolar Operation ....................0.3V to (V + 0.3V) CC Order Options Tape and Reel: Add TR Bipolar Operation ........... (V 0.3V) to (V + 0.3V) SS CC Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: