Datasheet LT1999-10, LT1999-20, LT1999-50 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | High Voltage, Bidirectional Current Sense Amplifier |
| Pages / Page | 28 / 1 — FEATURES. DESCRIPTION. Buffered Output with 3 Gain Options:. 10V/V, … |
| Revision | E |
| File Format / Size | PDF / 1.5 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Buffered Output with 3 Gain Options:. 10V/V, 20V/V, 50V/V. Gain Accuracy: 0.5% Max
Model Line for this Datasheet
- LT1999CMS8-10#PBF LT1999CMS8-10#TRPBF LT1999CMS8-10F#PBF LT1999CMS8-10F#TRPBF LT1999CMS8-20#PBF LT1999CMS8-20#TRPBF LT1999CMS8-20F#PBF LT1999CMS8-20F#TRPBF LT1999CMS8-50#PBF LT1999CMS8-50#TRPBF LT1999CMS8-50F#PBF LT1999CMS8-50F#TRPBF LT1999CS8-10#PBF LT1999CS8-10#TRPBF LT1999CS8-20#PBF LT1999CS8-20#TRPBF LT1999CS8-50#PBF LT1999CS8-50#TRPBF LT1999HMS8-10#PBF LT1999HMS8-10#TRPBF LT1999HMS8-10F#PBF LT1999HMS8-10F#TRPBF LT1999HMS8-10F#WPBF LT1999HMS8-10F#WTRPBF LT1999HMS8-20#PBF LT1999HMS8-20#TRPBF LT1999HMS8-20F#PBF LT1999HMS8-20F#TRPBF LT1999HMS8-20F#WPBF LT1999HMS8-20F#WTRPBF LT1999HMS8-50#PBF LT1999HMS8-50#TRPBF LT1999HMS8-50F#PBF LT1999HMS8-50F#TRPBF LT1999HMS8-50F#WPBF LT1999HMS8-50F#WTRPBF LT1999HS8-10#PBF LT1999HS8-10#TRPBF LT1999HS8-20#PBF LT1999HS8-20#TRPBF LT1999HS8-50#PBF LT1999HS8-50#TRPBF LT1999IMS8-10#PBF LT1999IMS8-10#TRPBF LT1999IMS8-10F#PBF LT1999IMS8-10F#TRPBF LT1999IMS8-20#PBF LT1999IMS8-20#TRPBF LT1999IMS8-20F#PBF LT1999IMS8-20F#TRPBF LT1999IMS8-50#PBF LT1999IMS8-50#TRPBF LT1999IMS8-50F#PBF LT1999IMS8-50F#TRPBF LT1999IS8-10#PBF LT1999IS8-10#TRPBF LT1999IS8-20#PBF LT1999IS8-20#TRPBF LT1999IS8-50#PBF LT1999IS8-50#TRPBF LT1999MPMS8-10#PBF LT1999MPMS8-10#TRPBF LT1999MPMS8-10F#PBF LT1999MPMS8-10F#TRPBF LT1999MPMS8-20#PBF LT1999MPMS8-20#TRPBF LT1999MPMS8-20F#PBF LT1999MPMS8-20F#TRPBF LT1999MPMS8-50#PBF LT1999MPMS8-50#TRPBF LT1999MPMS8-50F#PBF LT1999MPMS8-50F#TRPBF LT1999MPS8-10#PBF LT1999MPS8-10#TRPBF LT1999MPS8-20#PBF LT1999MPS8-20#TRPBF LT1999MPS8-50#PBF LT1999MPS8-50#TRPBF
Text Version of Document
LT1999-10/LT1999-20/ LT1999-50 High Voltage, Bidirectional Current Sense Amplifier
FEATURES DESCRIPTION
n
Buffered Output with 3 Gain Options:
The LT®1999 is a high speed precision current sense
10V/V, 20V/V, 50V/V
amplifier, designed to monitor bidirectional currents over n
Gain Accuracy: 0.5% Max
a wide common mode range. The LT1999 is offered in n
Input Common Mode Voltage Range: –5V to 80V
three gain options: 10V/V, 20V/V, and 50V/V. n
AC CMRR > 80dB at 100kHz
The LT1999 senses current via an external resistive shunt n
Input Offset Voltage: 1.5mV Max
and generates an output voltage, indicating both mag- n –3dB Bandwidth: 2MHz nitude and direction of the sensed current. The output n Smooth, Continuous Operation Over Entire Common voltage is referenced halfway between the supply voltage Mode Range and ground, or an external voltage can be used to set n 4kV HBM Tolerant and 1kV CDM Tolerant the reference level. With a 2MHz bandwidth and a com- n Low Power Shutdown <10µA mon mode input range of –5V to 80V, the LT1999 is suit- n –55°C to 150°C Operating Temperature Range able for monitoring currents in H-Bridge motor controls, n 8-Lead MSOP and 8-Lead SO (Narrow) Packages switching power supplies, solenoid currents, and battery n 8-Lead MSOP Pinout Option Engineered for FMEA charge currents from full charge to depletion. n AEC-Q100 Qualified for Automotive Applications The LT1999 operates from an independent 5V supply and draws 1.55mA. A shutdown mode is provided for mini-
APPLICATIONS
mizing power consumption. n High Side or Low Side Current Sensing The LT1999 is available in an 8-lead SOP, an 8-lead MSOP n H-Bridge Motor Control (original pinout), or an 8-lead pinout option engineered n Solenoid Current Sense for FMEA. n High Voltage Data Acquisition All registered trademarks and trademarks are the property of their respective owners. n PWM Control Loops n Fuse/MOSFET Monitoring
TYPICAL APPLICATION Full Bridge Armature Current Monitor
LT1999 V V+ S 5V V+ 2µA VOUT 1 SHDN 8 VSHDN 2.5V + RG V+IN V 4k – +IN 2 /DIV) (20V – R 7 S (2V V /DIV) V+ 0.8k + OUT V–IN V OUT V V+ +IN 0.8k 160k 4k 3 6 VREF V+ 5V 160k 0.1µF 4 TIME (10µs/DIV) 1999 TA01b 5 0.1µF 1999 TA01a Rev. E Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Applications Information Theory of Operation Typical Applications Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Buffered Output with 3 Gain Options:
The LT®1999 is a high speed precision current sense
10V/V, 20V/V, 50V/V
amplifier, designed to monitor bidirectional currents over n
Gain Accuracy: 0.5% Max
a wide common mode range. The LT1999 is offered in n
Input Common Mode Voltage Range: –5V to 80V
three gain options: 10V/V, 20V/V, and 50V/V. n
AC CMRR > 80dB at 100kHz
The LT1999 senses current via an external resistive shunt n
Input Offset Voltage: 1.5mV Max
and generates an output voltage, indicating both mag- n –3dB Bandwidth: 2MHz nitude and direction of the sensed current. The output n Smooth, Continuous Operation Over Entire Common voltage is referenced halfway between the supply voltage Mode Range and ground, or an external voltage can be used to set n 4kV HBM Tolerant and 1kV CDM Tolerant the reference level. With a 2MHz bandwidth and a com- n Low Power Shutdown <10µA mon mode input range of –5V to 80V, the LT1999 is suit- n –55°C to 150°C Operating Temperature Range able for monitoring currents in H-Bridge motor controls, n 8-Lead MSOP and 8-Lead SO (Narrow) Packages switching power supplies, solenoid currents, and battery n 8-Lead MSOP Pinout Option Engineered for FMEA charge currents from full charge to depletion. n AEC-Q100 Qualified for Automotive Applications The LT1999 operates from an independent 5V supply and draws 1.55mA. A shutdown mode is provided for mini-
APPLICATIONS
mizing power consumption. n High Side or Low Side Current Sensing The LT1999 is available in an 8-lead SOP, an 8-lead MSOP n H-Bridge Motor Control (original pinout), or an 8-lead pinout option engineered n Solenoid Current Sense for FMEA. n High Voltage Data Acquisition All registered trademarks and trademarks are the property of their respective owners. n PWM Control Loops n Fuse/MOSFET Monitoring
TYPICAL APPLICATION Full Bridge Armature Current Monitor
LT1999 V V+ S 5V V+ 2µA VOUT 1 SHDN 8 VSHDN 2.5V + RG V+IN V 4k – +IN 2 /DIV) (20V – R 7 S (2V V /DIV) V+ 0.8k + OUT V–IN V OUT V V+ +IN 0.8k 160k 4k 3 6 VREF V+ 5V 160k 0.1µF 4 TIME (10µs/DIV) 1999 TA01b 5 0.1µF 1999 TA01a Rev. E Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Applications Information Theory of Operation Typical Applications Package Description Revision History Typical Application Related Parts
