LTC1440 具有基准的超低功率单/双通道比较器

The LTC®1440/LTC1441/LTC1442 are ultralow power single and dual comparators with built-in references. The comparators feature less than 3.7µA supply current over temperature (LTC1440), a 1.182V ±1% reference, programmable hysteresis (LTC1440/LTC1442) and TTL/CMOS outputs that sink and source current. The reference output can drive a bypass capacitor of up to 0.01µF without oscillation.

The comparators operate from a single 2V to 11V supply or a dual ±1V to ±5.5V supply (LTC1440). Comparator hysteresis is easily programmed by using two resistors and the HYST pin (LTC1440/LTC1442). Each comparator’s input operates from the negative supply to within 1.3V of the positive supply. The comparator output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally happens when the comparator changes logic states, the power supply glitches are eliminated.

The LTC1440 is available in 8-pin PDIP, SO, MSOP and DFN packages. The LTC1441/LTC1442 are available in 8-pin PDIP and SO packages

产品特点 Features

Ultralow Quiescent Current: 2.1µA Typ (LTC1440)
Reference Output Drives 0.01µF Capacitor
Adjustable Hysteresis (LTC1440/LTC1442)
Wide Supply Range:
Single: 2V to 11V
Dual: ±1V to ±5.5V
Input Voltage Range Includes the Negative Supply
TTL/CMOS Compatible Outputs
12µs Propagation Delay with 10mV Overdrive
No Crowbar Current
40mA Continuous Source Current
Pin Compatible Upgrades for MAX921/922/923
3mm x 3mm x 0.75mm DFN Package (LTC1440)

参数

应用

Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Oscillator Circuits

典型应用图

LTC1440 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) *
LTC1440CDD	DFN	8	C	$2.36	$1.65
LTC1440CDD#PBF	DFN	8	C	$2.36	$1.65
LTC1440CDD#TR	DFN	8	C		$1.75
LTC1440CDD#TRPBF	DFN	8	C		$1.75
LTC1440CMS8	MSOP	8	C	$2.15	$1.65
LTC1440CMS8#PBF	MSOP	8	C	$2.15	$1.65
LTC1440CMS8#TR	MSOP	8	C		$1.71
LTC1440CMS8#TRPBF	MSOP	8	C		$1.71
LTC1440CN8	PDIP	8	C	$1.85	$1.45
LTC1440CN8#PBF	PDIP	8	C	$1.85	$1.45
LTC1440CS8	SO	8	C	$1.85	$1.45
LTC1440CS8#PBF	SO	8	C	$1.85	$1.45
LTC1440CS8#TR	SO	8	C		$1.51
LTC1440CS8#TRPBF	SO	8	C		$1.51
LTC1440IDD	DFN	8	I	$2.64	$1.85
LTC1440IDD#PBF	DFN	8	I	$2.64	$1.85
LTC1440IDD#TR	DFN	8	I		$1.95
LTC1440IDD#TRPBF	DFN	8	I		$1.95
LTC1440IMS8	MSOP	8	I	$2.64	$1.85
LTC1440IMS8#PBF	MSOP	8	I	$2.64	$1.85
LTC1440IMS8#TR	MSOP	8	I		$1.91
LTC1440IMS8#TRPBF	MSOP	8	I		$1.91
LTC1440IN8	PDIP	8	I	$2.20	$1.70
LTC1440IN8#PBF	PDIP	8	I	$2.20	$1.70
LTC1440IS8	SO	8	I	$2.20	$1.70
LTC1440IS8#PBF	SO	8	I	$2.20	$1.70
LTC1440IS8#TR	SO	8	I		$1.76
LTC1440IS8#TRPBF	SO	8	I		$1.76

LTC1440 数据手册及相关资料下载

数据手册(英文) : LTC1440/LTC1441/LTC1442 - Ultralow Power Single/Dual Comparator with Reference.PDF
规格变更通知书 : LTC1440/LTC1441/LTC1442 - Ultralow Power Single/Dual Comparator with Reference Specification Notice.PDF
应用指南 (英文) : AN113 - Power Conversion, Measurement and Pulse Circuits.PDF
应用指南 (英文) : AN70 - A Monolithic Switching Regulator with 100µV Output Noise.PDF
设计要点 (英文) : DN123 - Ultralow Power Comparators Include Reference.PDF
设计要点 (英文) : DN137 - New Comparators Feature Micropower Operation Under All Conditions.PDF
设计要点 (英文) : DN142 - Ultralow Quiescent Current DC/DC Converters for Light Load Applications.PDF
设计要点 (英文) : DN161 - The Smart Rock.PDF
设计要点 (英文) : DN163 - 1µA Op Amp Permits Precision Portable Circuitry.PDF
可靠性数据 : R312 Reliability Data .PDF
LT Journal : Sep 1999 Comparator Circuit Provides Automatic Shutdown of the LT1795 High Speed ADSL Power Amplifier.PDF