LT1999CMS8-50#TRPBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1999CMS8-50 is a high-voltage bidirectional current sense amplifier with 120 dB CMRR, 1500 µV offset voltage, current-feedback architecture, and SO-8 package for precision power monitoring.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999CMS8-50#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.6800(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- High-voltage bidirectional current sensing with 120 dB common-mode rejection ratio for accurate measurement across large common-mode swings
- Current-feedback operational amplifier architecture delivering wide bandwidth for fast transient current measurement in switching power supplies
- 1500 µV maximum input offset voltage enabling precise low-side and high-side current measurements with minimal error
- Integrated frequency compensation simplifying external circuit design and ensuring stable closed-loop operation
- Compact SO-8 package with tape-and-reel packaging supporting high-volume automated PCB assembly
Applications
The LT1999CMS8-50 is designed for precision bidirectional current monitoring in motor drives, battery management systems, and DC-DC converter feedback loops where high common-mode voltages are present. Its 120 dB CMRR and current-feedback architecture make it ideal for industrial power supplies, solar inverters, and EV charging stations requiring accurate current measurements across wide input ranges. Telecom power systems and server rack power distribution units also leverage this amplifier for real-time load monitoring and overcurrent protection.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1660 |
| YTEOL | 10 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | CURRENT-FEEDBACK |
| Average Bias Current-Max (IIB) | 1500 µA |
| Common-mode Reject Ratio-Nom | 120dB |
| 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 |
| Packing Method | TR |
| 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 | COMMERCIAL |
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 120 dB CMRR of the LT1999CMS8-50 benefit high-voltage current sensing applications?
With 120 dB common-mode rejection ratio, the LT1999CMS8-50 accurately measures differential current signals even when the bus voltage swings hundreds of volts above ground. This level of CMRR suppresses noise and common-mode interference, enabling reliable current measurement in motor drives, industrial inverters, and battery management systems where common-mode voltages far exceed typical op-amp input ranges.
In which bidirectional power systems can the LT1999CMS8-50 measure both charge and discharge currents?
The LT1999CMS8-50's bidirectional design handles current flow in both directions, making it suitable for battery chargers, regenerative motor drives, and bidirectional DC-DC converters. A single device measures both charge current up to the rated sense range and discharge current, reducing BOM complexity compared to using two unidirectional amplifiers. Its 1500 µV maximum offset ensures measurement accuracy across the full bidirectional range.
What packaging options are available for the LT1999CMS8-50, and how does it fit space-constrained PCB designs?
The LT1999CMS8-50 comes in an SO-8 small-outline package with 1.27 mm pin pitch, occupying minimal board area suitable for dense power management circuits. The 8-pin footprint integrates the complete current-sense amplifier function, including frequency compensation, eliminating the need for external compensation capacitors and reducing total solution size compared to discrete current sense implementations.
Related Guides
How to Choose a 3528 SMD Indicator LED for Blue Status Lighting: Selection Guide
A practical 3528 SMD indicator LED selection guide using 150141BS73100 and related Wurth 150141 variants for blue status lighting.
Jul 5, 2026
BAS70KFILM Design Guide for Low-Leakage Signal Clamping and RF Detector Inputs
Practical BAS70KFILM design guidance for signal clamps, RF detector inputs, leakage control, capacitance, layout, and sourcing alternatives.
Jul 5, 2026
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 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
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.7300 | $3.73 |
| 19+ | $3.5500 | $67.45 |
| 1000+ | $2.6800 | $2680.00 |
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.”