LT1999HMS8-50#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1999HMS8-50#PBF is a high-voltage bidirectional current-sense amplifier with 105 dB CMRR, 1500 µV max offset voltage, 50x fixed gain, and current-feedback architecture in an 8-pin SOIC package.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999HMS8-50#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.4800(MOQ 19)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT1999HMS8-50#PBF?
- Bidirectional high-voltage current sensing with 105 dB common-mode rejection ratio accurately measuring both positive and negative shunt currents on rails up to the device's rated common-mode range
- Fixed 50x gain and current-feedback architecture delivering wide bandwidth for precise current monitoring in switching power supplies and motor drives without external gain-setting resistors
- 1500 µV maximum input offset voltage enabling accurate low-side and high-side current measurement on small shunt resistors as low as 1 mOhm without significant zero-point error
- 175 µA maximum average bias current specification and frequency compensation ensuring stable output into capacitive loads across the full operating temperature range in the 8-pin SOIC package
What is LT1999HMS8-50#PBF used for?
The LT1999HMS8-50#PBF is optimized for high-voltage motor drive current-sensing, battery management systems, and switching power-supply overcurrent protection circuits that require bidirectional current measurement across a wide common-mode range. Its 105 dB CMRR allows accurate shunt voltage measurement even on rails with high common-mode noise from fast-switching PWM waveforms at switching frequencies above 100 kHz. The compact 8-pin SOIC package fits inline with the power stage on inverter and BMS boards where board space is limited.
What are the specifications of LT1999HMS8-50#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1660 |
| YTEOL | 10 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | CURRENT-FEEDBACK |
| Average Bias Current-Max (IIB) | 175 µA |
| Common-mode Reject Ratio-Nom | 105dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 1500 µV |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | NO |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 3V/us |
| Supply Current-Max | 1.9mA |
| Supply Voltage Limit-Max | 6V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Gain-Min | 49.75 |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Thailand |
Where can I find the LT1999HMS8-50#PBF datasheet?
LT1999HMS8-50#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT1999HMS8-50#PBF?
Compatible alternatives and drop-in replacements for LT1999HMS8-50#PBF:
Frequently Asked Questions
What CMRR does LT1999HMS8-50#PBF achieve, and why is 105 dB important in a PWM motor-drive current sensor?
The LT1999HMS8-50#PBF achieves 105 dB common-mode rejection ratio, meaning common-mode noise from a 400 V PWM bus switching at 20 kHz is attenuated by a factor of over 178,000 before reaching the output, allowing accurate millivolt-level shunt readings without rail-switching artifacts corrupting the current feedback signal in variable-frequency motor drives.
What is the fixed gain of LT1999HMS8-50#PBF and how does that simplify design compared to an adjustable-gain alternative?
The LT1999HMS8-50#PBF provides a fixed 50x gain set internally, eliminating the 2 precision external gain resistors required by adjustable-gain current amplifiers, which reduces BOM count, avoids resistor tolerance errors of up to 0.5% per resistor that add to gain inaccuracy, and saves layout area on dense power-stage PCBs.
Can LT1999HMS8-50#PBF measure current on both source and return sides of a bidirectional battery charger?
Yes. The bidirectional architecture measures both positive and negative differential voltages across the sense resistor, which corresponds to charge current flowing into the battery and discharge current flowing out, enabling a single LT1999HMS8-50#PBF to replace two unidirectional sense amplifiers in a 48 V bidirectional on-board charger or vehicle-to-grid converter design.
What is the maximum input offset voltage of LT1999HMS8-50#PBF, and what minimum shunt resistor value is practical?
The maximum input offset voltage is 1500 µV, which referred to the input represents a zero-current error of 1500 µV divided by the shunt resistance; with a 10 mOhm shunt resistor this equals 150 mA of zero-point error, so for currents above 1.5 A the offset becomes less than 10% of full-scale, making 10 mOhm to 100 mOhm the practical shunt range for accurate measurement.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
More from Analog Devices
LT3062EDCB#TRPBF
Small Outline No-lead
Integrated Circuit
LT3062EDCB#TRMPBF
Small Outline No-lead
Integrated Circuit
LT8641IUDC#TRPBF
Other
Integrated Circuit
HMC412AMS8GTR
Small Outline Packages
Integrated Circuit
LT3062HMS8E#PBF
Small Outline Packages
Integrated Circuit
LT3062IMS8E#PBF
Small Outline Packages
Integrated Circuit
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 19+ | $4.6100 | $87.59 |
| 250+ | $3.8571 | $964.27 |
| 500+ | $3.7875 | $1893.75 |
| 1000+ | $3.4800 | $3480.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit