LTC1542 Micropower Op Amp, Comparator and Reference

The LTC®1541/LTC1542 combine a micropower amplifier, comparator and bandgap reference (LTC1541) in an 8-pin package. The part operates from a single 2.5V to 12.6V or dual ±1.25V to ±6.3V supply with a typical supply current of 5µA. Both the op amp and comparator feature a common mode input voltage range that extends from the negative supply to within 1.3V of the positive supply. The op amp output stage swings from rail-to-rail. The comparator's inverting input is internally connected to the reference output (LTC1541).

The reference output voltage is 1.2V ±1% over the extended temperature range. The output can drive a bypass capacitor of up to 0.01µF without any oscillations. It can also source up to 2mA and sink up to 20µA.

The op amp is internally compensated to be unity-gain stable with typical GBW at 12kHz and slew rate of 8V/ms. The comparator has ±2.25mV of internal hysteresis to ensure clean output switching, even with slow moving input signals.

The LTC1541/LTC1542 are available in MSOP and SO-8 packages. For space-limited applications, the LTC1541/LTC1542 are available in a 3mm x 3mm low profile(0.8mm) dual fine-pitch leadless package (DFN).

产品特点 Features

Quiescent Current: 5µA Typ
Outputs Swing Rail-to-Rail
Low Op Amp Offset Voltage: 700µV Max
Reference Output Drives 0.01µF Capacitor
Internal 1.2V ±0.4% Reference Output (LTC1541)
Low Input Bias Current: 1nA Max
Reference Output Can Source Up to 2mA
Internal ±2.25mV Comparator Hysteresis
Comparator and Op Amp Input Range Includes Ground
Op Amp Capable of Driving Up to 1000pF Load
Unity-Gain Stable and 12kHz Bandwidth
2.5V to 12.6V Supply Voltage Range
Pin Compatible Upgrade for MAX951/MAX953
Available in 3mm x 3mm x 0.8mm DFN Package

参数

应用

Battery- or Solar-Powered Systems
Automotive Keyless Entry
Low Frequency, Local Area Alarms/Detectors
Infrared Receivers for Remote Controls
Smoke Detectors and Safety Sensors
GSM Portable Phones

典型应用图

LTC1542 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) *
LTC1542CDD	DFN	8	C	$2.31	$1.83
LTC1542CDD#PBF	DFN	8	C	$2.31	$1.83
LTC1542CDD#TR	DFN	8	C		$1.88
LTC1542CDD#TRPBF	DFN	8	C		$1.88
LTC1542CMS8	MSOP	8	C	$2.15	$1.70
LTC1542CMS8#PBF	MSOP	8	C	$2.15	$1.70
LTC1542CMS8#TR	MSOP	8	C		$1.75
LTC1542CMS8#TRPBF	MSOP	8	C		$1.75
LTC1542CS8	SO	8	C	$2.05	$1.50
LTC1542CS8#PBF	SO	8	C	$2.05	$1.50
LTC1542CS8#TR	SO	8	C		$1.55
LTC1542CS8#TRPBF	SO	8	C		$1.55
LTC1542IDD	DFN	8	I	$2.54	$1.99
LTC1542IDD#PBF	DFN	8	I	$2.54	$1.99
LTC1542IDD#TR	DFN	8	I		$2.04
LTC1542IDD#TRPBF	DFN	8	I		$2.04
LTC1542IMS8	MSOP	8	I	$2.37	$1.85
LTC1542IMS8#PBF	MSOP	8	I	$2.37	$1.85
LTC1542IMS8#TR	MSOP	8	I		$1.90
LTC1542IMS8#TRPBF	MSOP	8	I		$1.90
LTC1542IS8	SO	8	I	$2.26	$1.65
LTC1542IS8#PBF	SO	8	I	$2.26	$1.65
LTC1542IS8#TR	SO	8	I		$1.70
LTC1542IS8#TRPBF	SO	8	I		$1.70

LTC1542 数据手册及相关资料下载

数据手册(英文) : LTC1541/LTC1542 - Micropower Op Amp, Comparator and Reference.PDF
设计要点 (英文) : DN188 - Inexpensive Circuit Charges Lithium-Ion Cells.PDF
设计要点 (英文) : DN190 - Op Amp, Comparator and Reference IC Provides Micropower Monitoring Capability.PDF
可靠性数据 : R312 Reliability Data .PDF