LT1999CMS8-10#TRPBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1999CMS8-10#TRPBF is a high-voltage bidirectional current-sense amplifier with 120dB CMRR, 10x fixed gain, up to ±500V common-mode input, and MSOP-8 package for motor-drive and industrial current monitoring.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999CMS8-10#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
What are the key features of LT1999CMS8-10#TRPBF?
- 120dB common-mode rejection ratio (CMRR) enables accurate current measurement on high-voltage rails up to ±500V without signal distortion from supply-rail noise
- Fixed 10x gain simplifies system design by eliminating external gain-setting resistors while providing a well-defined, trimmed amplification factor for current-sense applications
- Bidirectional output centered at mid-supply allows measurement of both positive and negative current flow in H-bridge motor-drive and regenerative braking circuits
- MSOP-8 package delivers a compact footprint for current-sensing in space-constrained industrial motor-drive boards and power-management modules
What is LT1999CMS8-10#TRPBF used for?
The LT1999CMS8-10#TRPBF is designed for bidirectional current sensing on high-voltage buses in motor-drive inverters, industrial power supplies, and battery management systems where common-mode voltages can reach ±500V. Its 120dB CMRR and fixed 10x gain allow precise current measurement across a shunt resistor on a high-side rail without the accuracy degradation typical of resistor-matched difference amplifiers, making it suitable for overcurrent protection, energy metering, and closed-loop current-control feedback in servo drives and variable-frequency drive (VFD) systems.
What are the specifications of LT1999CMS8-10#TRPBF?
| 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 | 9.95 |
| 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 |
Where can I find the LT1999CMS8-10#TRPBF datasheet?
LT1999CMS8-10#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT1999CMS8-10#TRPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What common-mode voltage range does the LT1999CMS8-10#TRPBF support, and why is this important for motor-drive designs?
The LT1999CMS8-10#TRPBF tolerates common-mode input voltages up to ±500V, allowing it to sense current directly on the high-side rail of 3-phase motor inverters operating from 400V AC mains without an isolation barrier. This eliminates the cost and latency of optocouplers or isolation amplifiers in many industrial motor-control designs.
How does the fixed 10x gain of the LT1999CMS8-10#TRPBF affect measurement accuracy compared to an external resistor-matched difference amplifier?
With a factory-trimmed internal 10x gain, the LT1999CMS8-10#TRPBF avoids the gain error introduced by resistor tolerance in discrete difference amplifiers, which can reach 0.5% to 1% with 0.1% resistors. The internal trimmed architecture achieves higher CMRR (120dB) than a 4-resistor topology, resulting in more accurate current measurement over temperature and across high common-mode swings.
Can the LT1999CMS8-10#TRPBF measure negative (reverse) current, and how is the output referenced?
Yes. The bidirectional architecture centers the output at mid-supply (VCC/2) when zero current flows through the shunt, swinging above mid-supply for positive current and below for negative current. This allows the amplifier to represent reverse current—such as regenerative braking current in a DC motor H-bridge—without clipping, using the full output range of the 8-pin MSOP device.
How does the 1500 µA maximum bias current specification of the LT1999CMS8-10#TRPBF affect shunt resistor selection?
The 1500 µA maximum input bias current flows through the shunt resistor and creates an offset voltage error. For a 10mΩ shunt, the error is up to 15µV—negligible compared to the 1500µV input offset specification. For very low shunt values (below 1mΩ), the bias current contribution becomes proportionally larger and should be included in the total error budget for precision energy-metering applications.
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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+ | $3.7300 | $3.73 |
| 19+ | $3.5500 | $67.45 |
| 1000+ | $2.6800 | $2680.00 |
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