LTC1277 12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown

The LTC®1274/LTC1277 are 8µs sampling 12-bit A/D converters which draw only 2mA (typ) from single 5V or ±5V supplies. These easy-to-use devices come complete with a 2ms sample-and-hold, a precision reference and an internally trimmed clock. Unipolar and bipolar conversion modes add to the flexibility of the ADCs.

Two power-down modes are available in the LTC1277. In Napmode, the LTC1277 draws only 180µA and the instant wake-up from Nap mode allows the LTC1277 to be powered down even during brief inactive periods. In Sleep mode only 1µA will be drawn. A REFRDY signal is used to show the ADC is ready to sample after waking up from Sleep mode. The LTC1274 also provides the Sleep mode and REFRDY signal.

The A/D converters convert 0V to 4.096V unipolar inputs from a single 5V supply or ±2.048V bipolar inputs from ±5V supplies.

The LTC1274 has a single-ended input and a 12-bit parallel data format. The LTC1277 offers a differential input and a 2-byte read format. The bipolar mode is formatted as 2’s complement for the LTC1274 and offset binary for the LTC1277

产品特点 Features Low Power Dissipation: 10mW Sample Rate: 100ksps Samples Inputs Beyond Nyquist, 72dB S/(N D) and 82dB THD at fIN = 100kHz Single Supply 5V or ±5V Operation Power Shutdown to 1µA in Sleep Mode 180µA Nap Mode (LTC1277) with Instant Wake-Up Internal Reference Can Be Overdriven Internal Synchronized Clock 0V to 4.096V or ±2.048V Input Ranges (1mV/LSB) 24-Lead SOL Package 封装	应用 Battery-Powered Portable Systems High Speed Data Acquisition for PCs Digital Signal Processing Multiplexed Data Acquisition Systems Audio and Telecom Processing Spectrum Analysis 典型应用图参数

产品特点 Features

Low Power Dissipation: 10mW
Sample Rate: 100ksps
Samples Inputs Beyond Nyquist, 72dB S/(N D) and 82dB THD at fIN = 100kHz
Single Supply 5V or ±5V Operation
Power Shutdown to 1µA in Sleep Mode
180µA Nap Mode (LTC1277) with Instant Wake-Up
Internal Reference Can Be Overdriven
Internal Synchronized Clock
0V to 4.096V or ±2.048V Input Ranges (1mV/LSB)
24-Lead SOL Package

封装

应用

Battery-Powered Portable Systems
High Speed Data Acquisition for PCs
Digital Signal Processing
Multiplexed Data Acquisition Systems
Audio and Telecom Processing
Spectrum Analysis

典型应用图

参数

LTC1277 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1277CSW	SO	24	C	$9.90	$7.60
LTC1277CSW#PBF	SO	24	C	$9.90	$7.60
LTC1277CSW#TR	SO	24	C		$7.70
LTC1277CSW#TRPBF	SO	24	C		$7.70
LTC1277ISW	SO	24	I	$10.80	$8.45
LTC1277ISW#PBF	SO	24	I	$10.80	$8.45
LTC1277ISW#TR	SO	24	I		$8.55
LTC1277ISW#TRPBF	SO	24	I		$8.55

LTC1277 数据手册及相关资料下载

数据手册(英文) : LTC1274/LTC1277 - 12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown.PDF
设计要点 (英文) : DN148 - Low Power, Fast Op Amps Have Low Distortion.PDF
可靠性数据 : R107 Reliability Data .PDF