Datasheet LTC1418 (Analog Devices)

LTC1418 Low Power, 14-Bit, 200ksps ADC with Serial and Parallel I/O
FEATURES DESCRIPTION
n
Single Supply 5V or ±5V Operation
The LTC®1418 is a low power, 200ksps, 14-bit A/D con- n
Sample Rate: 200ksps
verter. Data output is selectable for 14-bit parallel or serial n
±1.25LSB INL and ±1LSB DNL Max
format. This versatile device can operate from a single 5V n
Power Dissipation: 15mW (Typ)
or ±5V supply. An onboard high performance sample-and- n
Parallel or Serial Data Output
hold, a precision reference and internal timing minimize n No Missing Codes Over Temperature external circuitry requirements. The low 15mW power n Power Shutdown: Nap and Sleep dissipation is made even more attractive with two user n External or Internal Reference selectable power shutdown modes. n Differential High Impedance Analog Input The LTC1418 converts 0V to 4.096V unipolar inputs from n Input Range: 0V to 4.096V or ±2.048V a single 5V supply and ±2.048V bipolar inputs from ±5V n 81.5dB S/(N + D) and –94dB THD at Nyquist supplies. DC specs include ±1.25LSB INL, ±1LSB DNL n 28-Lead SSOP Package and no missing codes over temperature. Outstanding AC performance includes 82dB S/(N + D) and 94dB THD at
APPLICATIONS
the Nyquist input frequency of 100kHz. n Remote Data Acquisition The flexible output format allows either parallel or serial n Battery Operated Systems I/O. The SPI/MICROWIRE compatible serial I/O port can n Digital Signal Processing operate as either master or slave and can support clock n Isolated Data Acquisition Systems frequencies from DC to 10MHz. A separate convert start n Audio and Telecom Processing input and a data ready signal (BUSY) allow easy control n Medical Instrumentation of conversion start and data transfer. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION Low Power, 200kHz, 14-Bit Sampling A/D Converter Typical INL Curve
5V 1.0 10μF VDD LTC1418 SER/PAR D13 0.5 A + IN S/H 14-BIT ADC 14 D5 SELECTABLE A – IN SERIAL/ D4 (EXTCLKIN) 0 PARALLEL D3 (SCLK) PORT INL (LSBs) 4.096V D2 (CLKOUT) REFCOMP D1 (DOUT) BUFFER 10μF D0 (EXT/INT) –0.5 BUSY 8k 2.5V TIMING AND CS VREF REFERENCE LOGIC RD –1.0 CONVST 1μF 0 4096 8192 12288 16384 SHDN OUTPUT CODE AGND VSS DGND 1418 TA02 1418 TA01 (0V OR –5V) 1418fa For more information www.linear.com/LTC1418 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Package/Order Information Converter Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Digital Inputs and Outputs Power Requirements Timing Characteristics Typical Performance Characteristics Pin Functions Test Circuit Block Diagram Applications Information Package Description Package Description Revision History Typical Application Related Parts