LT1999CMS8-10#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The LT1999CMS8-10#PBF is a high-voltage bidirectional current-sense amplifier from Analog Devices with 120 dB CMRR, fixed 10 V/V gain, 1.5 mV input offset voltage, and wide common-mode input range, housed in an 8-pin MSOP package.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999CMS8-10#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.6800(MOQ 19)
- 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#PBF?
- 120 dB common-mode rejection ratio enables accurate current sensing on high-voltage rails without differential interference
- Fixed 10 V/V gain (LT1999-10 variant) simplifies PCB design by eliminating external gain-setting resistors
- Bidirectional current sensing detects both positive and negative current flow, essential for regenerative motor drives and battery chargers
- Wide common-mode input range supports use on bus voltages well above the amplifier supply voltage
- Compact 8-pin MSOP package (manufacturer code 05-08-1660) minimizes PCB area in space-constrained power management circuits
What is LT1999CMS8-10#PBF used for?
The LT1999CMS8-10#PBF is deployed in motor drive inverters, battery management systems, and DC-DC converter feedback loops where accurate bidirectional current measurement on high-voltage buses is required. Its 120 dB CMRR prevents high common-mode voltages from corrupting the differential current signal, enabling reliable measurement even on 60 V or higher rails. The fixed 10 V/V gain eliminates resistor tolerance errors in the gain path, improving measurement repeatability across production without per-board calibration.
What are the specifications of LT1999CMS8-10#PBF?
| 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 |
| 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 |
| Country of Origin | Malaysia |
Where can I find the LT1999CMS8-10#PBF datasheet?
LT1999CMS8-10#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT1999CMS8-10#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the common-mode rejection ratio of the LT1999CMS8-10#PBF and why does it matter for high-voltage current sensing?
The LT1999CMS8-10#PBF achieves a nominal CMRR of 120 dB, meaning a 100 V common-mode disturbance on the bus produces less than 0.1 mV error at the output. This level of rejection is essential in motor drive applications where switching noise on the high-side current sense node can otherwise overwhelm the small differential signal across a milliohm shunt resistor.
What is the fixed gain of the LT1999CMS8-10#PBF and how does this simplify the design compared to adjustable-gain alternatives?
The LT1999CMS8-10#PBF has a fixed 10 V/V gain set internally, requiring no external gain resistors. This eliminates resistor matching errors and reduces the component count by 2-4 parts per channel compared to instrumentation amplifiers that need an external gain network, improving measurement accuracy across production units with no per-board trimming.
Can the LT1999CMS8-10#PBF measure bidirectional current, and what applications require this capability?
Yes, the LT1999CMS8-10#PBF is specifically designed for bidirectional current sensing, detecting both positive and negative current flow through the sense resistor. This capability is essential in regenerative motor drives where the motor acts as a generator during braking, in bidirectional DC-DC converters, and in battery management systems that must monitor both charge and discharge currents with a single 10 V/V gain stage.
What input offset voltage does the LT1999CMS8-10#PBF specify, and how does this affect minimum measurable current?
The LT1999CMS8-10#PBF has a maximum input offset voltage of 1.5 mV referred to the input. For a 10 mOhm shunt resistor, this 1.5 mV offset corresponds to a 150 mA minimum measurable current threshold. Designers measuring lower currents should select a larger sense resistor or apply system-level offset calibration, balancing accuracy against power dissipation in the shunt.
In which package does the LT1999CMS8-10#PBF come, and how does it fit on a compact power management board?
The LT1999CMS8-10#PBF is housed in an 8-pin MSOP package, measuring approximately 3.0 mm x 3.0 mm, which is about 50% smaller than an 8-pin SOIC package. This compact footprint is advantageous in multi-phase motor controllers and battery protection circuits where multiple current-sense amplifiers must fit on a board alongside gate drivers and power MOSFETs.
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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 |
|---|---|---|
| 19+ | $3.5500 | $67.45 |
| 250+ | $3.0832 | $770.79 |
| 500+ | $2.9125 | $1456.25 |
| 1000+ | $2.6800 | $2680.00 |
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