LTC1404| Datasheet

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LTC1404 Complete SO-8, 12-Bit, 600ksps ADC with Shutdown

FEATURES

DESCRIPTIO

Complete 12-Bit ADC in SO-8 Single Supply 5V or 5V Operation Sample Rate: 600ksps Power Dissipation: 75mW (Typ) 72dB S/(N + D) and 80dB THD at Nyquist No Missing Codes over Temperature Nap Mode with Instant Wake-Up: 7.5mW Sleep Mode: 60uW High Impedance Analog Input Input Range (1mV/LSB): 0V to 4.096V or 2.048V Internal Reference Can Be Overdriven Externally 3-Wire Interface to DSPs and Processors (SPI and MICROWIRETM Compatible)

The LTC 1404 is a complete 600ksps, 12-bit A/D converter which draws only 75mW from 5V or 5V supplies. This easy-to-use device comes complete with a 160ns sample-and-hold and a precision reference. Unipolar and bipolar conversion modes add to the flexibility of the ADC. The LTC1404 has two power saving modes: Nap and Sleep. In Nap mode, it consumes only 7.5mW of power and can wake up and convert immediately. In the Sleep mode, it consumes 60uW of power typically. Upon powerup from Sleep mode, a reference ready (REFRDY) signal is available in the serial data word to indicate that the reference has settled and the chip is ready to convert. The LTC1404 converts 0V to 4.096V unipolar inputs from a single 5V supply and 2.048V bipolar inputs from 5V supplies. Maximum DC specs include 1LSB INL, 1LSB DNL and 45ppm/ C full-scale drift over temperature. Guaranteed AC performance includes 69dB S/(N + D) and 76dB THD at an input frequency of 100kHz over temperature. The 3-wire serial port allows compact and eff
icient data transfer to a wide range of microprocessors, microcontrollers and DSPs.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

APPLICATIO S

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

TYPICAL APPLICATIO
5V

Single 5V Supply, 600kHz, 12-Bit Sampling A/D Converter

Power Consumption vs Sample Rate
100 NORMAL CONVERSION

SUPPLY CURRENT (mA)

+
10uF* ANALOG INPUT (0V TO 4.096V) REFOUT 2.43V + 10uF 0.1uF 0.1uF

VCC LTC1404 AIN VREF GND

VSS MPU P1.4 P1.3 P1.2 SERIAL DATA LINK
LTC1404 TA01

10 NAP MODE BETWEEN CONVERSION 1 SLEEP MODE BETWEEN CONVERSION

CONV CLK DOUT

0.1

0.01 9.6MHz CLOCK 0.001 0.01 0.1 1 10 100 1k 10k 100k 1M SAMPLE RATE (Hz)
LTC1404 TA02

*AVX TPSD106M035R0300

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LTC1404 DATASHEET