LTC1282

Features:

 Single Supply 3V or ±3V Operation
140ksps Throughput Rate
 12mW (Typ) Power Dissipation
 On-Chip 25ppm/°C Reference
 Internal Synchronized Clock; No Clock Required
 High Impedance Analog Input
 69dB S/(N + D) and 77dB THD at Nyquist
 ±0.5LSB INL and ±0.75LSB DNL Max (A Grade)
 2.7V Guaranteed Minimum Supply Voltage
 ESD Protected On All Pins
 24-Pin Narrow PDIP and SW Packages
 0V to 2.5V or ±1.25V Input Ranges


Application

 3V Powered Systems
 High Speed Data Acquisition
 Digital Signal Processing
 Multiplexed Data Acquisition Systems
 Audio and Telecom Processing
 Spectrum Analysis


Pinout




Specifications

Supply Voltage (V_DD) .............................................. 12V
Negative Supply Voltage (V_SS)................................ 6V to GND
Total Supply Voltage (V_DD to V_SS) .......................... 12V
Analog Input Voltage(Note 3) ................................. V_SS 0.3V to V_DD + 0.3V
Digital Input Voltage (Note 4) ................................. V_SS 0.3V to 12V
Digital Output Voltage(Note 3) ................................ V_SS 0.3V to V_DD + 0.3V
Power Dissipation.................................................... 500mW
Specified Temperature Range (Note 14) ................. 0°C to 70°C
Operating Temperature Range
      LTC1282AC, LTC1282BC ................................... 0°C to 70°C
Storage Temperature Range ................................ 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C


Description

The LTC^®1282 is a 6s, 140ksps, sampling 12-bit A/D converter that draws only 12mW from a single 3V or dual ±3V supply. This easy-to-use device comes complete with 1.14s sample-and-hold, precision reference and internally trimmed clock. Unipolar and bipolar conversion modes provide flexibility for various applications. They are built with LTBiCMOS^TM switched capacitor technology.

The LTC1282 has a 25ppm/°C (max) internal reference and converts 0V to 2.5V unipolar inputs from a single 3V supply. With ±3V supplies its input range is ±1.25V with two's complement output format. Maximum DC specifications include ±0.5LSB INL, ±0.75LSB DNL and 25ppm/°C full-scale drift over temperature. Outstanding AC performance includes 69dB S/(N + D) and 77dB THD at the Nyquist input frequency of 70kHz.

The internal clock of LTC1282 is trimmed for 6ms maximum conversion time. The clock automatically synchronizes to each sample command eliminating problems with asynchronous clock noise found in competitive devices. A high speed parallel interface eases connections to FIFOs, DSPs and microprocessors.