LTC1427-50 Micropower, 10-Bit Current Output DAC with SMBus Serial Interface

The LTC®1427-50 is a micropower, 10-Bit current output DAC with an output range of 0µA to 50µA. The DAC output is guaranteed monotonic and DNL is less than 0.9LSB under all operating conditions. Full-scale accuracy is ±2.5% over the commercial temperature range. The LTC1427-50 operates with power supply voltages from 2.7V to 5.5V and the DAC current source output can be biased from (VCC – 1.3V) to –15V. The LTC1427-50 communicates with external circuitry by using the SMBus serial interface. It acts as an SMBus slave device using one of four selectable SMBus addresses set by the two address pins AD0 and AD1 . On power-up, the DAC output assumes midrange or zero scale, depending on the logic state of the two address pins. The LTC1427-50 can be shut down through the SHDN pin or by setting the SHDN bit = 1 in the SMBus command byte. Digital data for the DAC output is retained internally and the supply current drops to 10µA typically when in shutdown. The LTC1427-50 is available in an 8-pin SO package

产品特点 Features

Precision 50µA, ±1.5% Initial Full-Scale Output Current, ±2.5% Over Temperature
Wide Output Voltage DC Compliance: –15V to (VCC – 1.3V)
Wide Supply Range: 2.7V </= VCC </= 5.5V
Supply Current in Shutdown: 10µA Typ
Low Supply Current: 115µA Typ
Available in 8-Pin SO
SMBus Serial Interface
Four Selectable SMBus Addresses
DAC Powers Up at Zero or Midscale
DAC Contents Are Retained in Shutdown

应用

LCD Contrast and Backlight Brightness Control
Power Supply Voltage Adjustment
Battery Charger Voltage/Current Adjustment
GaAs FET Bias Adjustment
Trimmer Pot Elimination

典型应用图

LTC1427-50 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) *
LTC1427CS8-50	SO	8	C	$3.60	$3.00
LTC1427CS8-50#PBF	SO	8	C	$3.60	$3.00
LTC1427CS8-50#TR	SO	8	C		$3.06
LTC1427CS8-50#TRPBF	SO	8	C		$3.06

LTC1427-50 数据手册及相关资料下载

数据手册(英文) : LTC1427-50 - Micropower, 10-Bit Current Output DAC with SMBus Serial Interface.PDF
可靠性数据 : R392 Reliability Data .PDF
应用指南 : AN67 - linear Technology Magazine Circuit Collection, Volume III.PDF