LTC1282 Datasheet | Linear Technology

Features nn Single Supply 3V or ±3V Operation nn 140ksps Throughput Rate nn 12m W (Typ) Power Dissipation nn On-Chip 25ppm/°C Reference nn Internal Synchronized Clock; No Clock Required nn High Impedance Analog Input nn 69d B S/(N + D) and 77d B THD at Nyquist nn ±0.5LSB INL and ±0.75LSB DNL Max (A Grade) nn 2.7V Guaranteed Minimum Supply Voltage nn ESD Protected On All Pins nn 24-Pin SW Package nn 0V to 2.5V or ±1.25V Input Ranges APPLICATIONS nn 3V Powered Systems nn High Speed Data Acquisition nn Digital Signal Processing nn Multiplexed Data Acquisition Systems nn Audio and Tele Processing nn Spectrum Analysis All registered trademarks and trademarks are the property of their respective owners. LTC1282 3V 140ksps 12-Bit Sampling A/D Converter with Reference DESCRIPTION The LTC®1282 is a 6µs, 140ksps, sampling 12-bit A/D converter that draws only 12m W from a single 3V or dual ±3V supply. This easy-to-use device es plete with 1.14µs sample-and-hold, precision reference and internally trimmed clock. Unipolar and bipolar conversion modes provide flexibility for various applications. They are built with LTBi CMOSTM 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 plement output format. Maximum DC specifications include ±0.5LSB INL, ±0.75LSB DNL and 25ppm/°C full-scale drift over temperature. Outstanding AC performance includes 69d B S/(N + D) and 77d B THD at the Nyquist input frequency of 70k Hz. The internal clock is trimmed for 6µs maximum conversion time. The clock automatically synchronizes to each sample mand eliminating problems with asynchronous clock noise found in petitive devices. A high speed parallel interface eases connections to FIFOs, DSPs and microprocessors. TYPICAL APPLICATION Single 3V Supply, 140ksps, 12-Bit Sampling A/D Converter 1.20V VREF OUTPUT + 10µF ANALOG INPUT 1 (0V...