LT1999CMS8-20#TRPBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1999CMS8-20#TRPBF is a high-voltage bidirectional current-sense amplifier with 120 dB CMRR, 20x gain, and up to 1500 µV input offset, designed for precision power monitoring in an 8-pin SOIC package.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999CMS8-20#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 measurements in noisy environments
- Fixed 20x gain setting simplifies external circuit design and reduces component count
- Input offset voltage of 1500 µV maximum enables precise low-side and high-side shunt sensing
- 8-pin SOIC package compatible with standard PCB layouts for power monitoring circuits
- Current-feedback architecture with frequency compensation for stable operation across varying load conditions
Applications
The LT1999CMS8-20#TRPBF is used in precision power management systems, motor drive current monitoring, and battery management circuits where bidirectional current sensing at high common-mode voltages is required. Its 120 dB CMRR makes it well-suited for industrial inverters, DC-DC converter feedback loops, and solar power monitoring where supply rail noise would otherwise corrupt measurements. The device is also employed in telecom power supplies and UPS systems for load current tracking and fault 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 | 19.9 |
| 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
What is the gain and CMRR specification of LT1999CMS8-20#TRPBF for high-voltage sensing?
The LT1999CMS8-20#TRPBF has a fixed gain of 20x and a common-mode rejection ratio of 120 dB, enabling accurate current measurements even when the sense resistor sits on a high-voltage rail with significant common-mode noise.
Can LT1999CMS8-20#TRPBF measure current in both directions for battery charge-discharge monitoring?
Yes, it is a bidirectional current-sense amplifier capable of measuring positive and negative current flow across a shunt resistor, making it ideal for battery charge-discharge cycle monitoring in energy storage systems operating across wide voltage ranges.
What package does LT1999CMS8-20#TRPBF use and how does it fit into a standard power monitoring layout?
It comes in an 8-pin SOIC package, which is compatible with standard surface-mount PCB footprints used in power supply, motor drive, and industrial monitoring boards, minimizing board area while providing reliable lead connections.
How does the 1500 µV input offset of LT1999CMS8-20#TRPBF affect shunt resistor selection in a 5A sensing circuit?
With a 1500 µV maximum offset and a 20x gain, the worst-case output error is 30 mV; for a 5A full-scale range, selecting a shunt of at least 10 mΩ yields a 50 mV full-scale signal, keeping the offset error below 60% of full scale and preserving useful measurement resolution.
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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.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.4200 | $7.42 |
| 19+ | $3.5500 | $67.45 |
| 1000+ | $2.6800 | $2680.00 |
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