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