LT1999CMS8-20F#TRPBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1999CMS8-20F#TRPBF is a high-voltage bidirectional current-sense amplifier with 105 dB CMRR, 1500 µV maximum input offset voltage, current-feedback architecture, and an 8-pin MSOP package engineered for Pin FMEA robustness.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999CMS8-20F#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 LT1999CMS8-20F#TRPBF?
- 105 dB common-mode rejection ratio enables accurate current sensing on high-side rails with large common-mode swings
- Bidirectional current measurement captures both positive and negative load currents in motor drives and battery management systems
- Engineered for Pin FMEA (Failure Mode and Effects Analysis) ensuring safe output behavior under single-pin fault conditions
- Current-feedback op-amp architecture with frequency compensation supports high-bandwidth signal paths in power monitoring loops
- 1500 µV maximum input offset voltage maintains measurement accuracy across temperature without external calibration trimming
What is LT1999CMS8-20F#TRPBF used for?
The LT1999CMS8-20F#TRPBF is designed for high-side and bidirectional current sensing in motor drive controllers, battery management systems, and industrial power supplies where the sense resistor sits on a rail with large common-mode voltages. Its 105 dB CMRR enables accurate shunt-based measurement in half-bridge and H-bridge circuits without the common-mode error that degrades standard op-amp solutions. The Pin FMEA-compliant design is particularly valuable in automotive and safety-critical applications where fault-tolerant behavior under single-pin open or short conditions is a system-level requirement.
What are the specifications of LT1999CMS8-20F#TRPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1660 |
| YTEOL | 10 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | CURRENT-FEEDBACK |
| Average Bias Current-Max (IIB) | 2350 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 |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| 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 |
| 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 |
Where can I find the LT1999CMS8-20F#TRPBF datasheet?
LT1999CMS8-20F#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT1999CMS8-20F#TRPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What common-mode rejection ratio does the LT1999CMS8-20F#TRPBF specify, and why does CMRR matter for current sensing?
The LT1999CMS8-20F#TRPBF achieves a nominal 105 dB CMRR, which means a 100 V common-mode swing on the sense inputs produces less than 0.6 µV of equivalent input offset error. This is critical for high-side current sensing on bus rails where the common-mode voltage can range from 0 V to tens of volts, as a low CMRR would corrupt the small differential voltage across the sense resistor.
What does 'engineered for Pin FMEA' mean in the context of the LT1999CMS8-20F#TRPBF?
Pin FMEA (Failure Mode and Effects Analysis) means the LT1999CMS8-20F#TRPBF has been designed so that any single-pin failure—open, short to supply, or short to ground—produces a defined, safe output state rather than an unpredictable response. For automotive and industrial safety systems, this guarantees that a component fault does not cause a false current reading that could command an incorrect protection or control action in downstream circuits.
Can the LT1999CMS8-20F#TRPBF measure current flowing in both directions, and in which applications is this important?
Yes, the LT1999CMS8-20F#TRPBF is a bidirectional current-sense amplifier that accurately measures both positive (source) and negative (sink) current through the sense resistor. This is essential in regenerative motor drives where the load transitions between motoring and braking, battery pack charger-discharger circuits that alternate current direction, and DC-DC converters operating in synchronous or bidirectional modes requiring 4-quadrant current measurement.
What is the maximum input offset voltage, and how does it affect sense-resistor selection for precision current monitoring?
The LT1999CMS8-20F#TRPBF specifies a maximum input offset voltage of 1500 µV (1.5 mV). For a target measurement accuracy of 1%, the full-scale differential voltage across the sense resistor should be at least 150 mV, which for a 10 A maximum current implies a sense resistor no smaller than 15 mΩ. Choosing a larger sense resistor or calibrating out the offset in firmware reduces the offset-induced error contribution in precision power metering designs.
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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+ | $3.6500 | $3.65 |
| 19+ | $3.5500 | $67.45 |
| 1000+ | $2.6800 | $2680.00 |
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