LT1999CS8-50#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The LT1999CS8-50#PBF is a high-voltage bidirectional current sense amplifier from Analog Devices in an 8-pin SOIC package. It features 120 dB common-mode rejection ratio and 1500 µV maximum input offset voltage for precise current measurement. Available from stock with worldwide shipping for industrial and power management applications.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999CS8-50#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
Key Features
- 120 dB common-mode rejection ratio enables accurate current sensing on high-voltage rails
- Bidirectional current measurement supports both positive and negative current flow detection
- Current-feedback architecture with frequency compensation for stable high-speed operation
- 8-pin SOIC package fits compact PCB layouts in motor drive and power management systems
Applications
The LT1999CS8-50#PBF is designed for high-side and low-side current sensing in motor drives, power converters, and battery management systems operating on high-voltage rails. Its bidirectional sensing capability and 120 dB CMRR make it ideal for precision power monitoring in solar inverters and industrial power supplies. The device is also used in overcurrent protection circuits and energy metering applications requiring accurate bidirectional current measurement.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1610 (S8) |
| 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 | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | NO |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| 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 | 1.27mm |
| 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 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What common-mode rejection ratio does LT1999CS8-50#PBF achieve, and why does that matter for high-voltage sensing?
The LT1999CS8-50#PBF achieves a 120 dB common-mode rejection ratio, which means it can accurately measure small sense voltages on top of large bus voltages without significant error. This is critical in 48 V or higher-voltage power systems where even a 1% CMRR error would translate to hundreds of millivolts of measurement offset.
Can LT1999CS8-50#PBF measure current in both directions, and what use cases does that enable?
Yes, LT1999CS8-50#PBF is a bidirectional current sense amplifier, capable of measuring both positive and negative current flow. This makes it essential for bidirectional DC-DC converters, regenerative motor drives, and battery systems where charge and discharge currents must both be monitored with 120 dB CMRR accuracy.
What is the maximum input offset voltage of LT1999CS8-50#PBF, and how does it affect measurement accuracy?
The LT1999CS8-50#PBF has a maximum input offset voltage of 1500 µV. When sensing across a 10 mΩ shunt resistor at 1 A load (10 mV drop), the 1.5 mV offset represents a 15% error, so designers should use lower-value sense resistors or higher currents to keep offset error below 1% in precision power monitoring applications.
Which package does LT1999CS8-50#PBF use, and how does it fit into a compact motor-control PCB layout?
The LT1999CS8-50#PBF comes in an 8-pin SOIC package (approximately 5 mm x 4 mm footprint), which is compact enough to place close to the current sense resistor on a motor-control PCB. Minimizing trace length between shunt and amplifier inputs reduces parasitic inductance and improves sensing accuracy at switching frequencies above 100 kHz.
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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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| 19+ | $3.5500 | $67.45 |
| 100+ | $3.4301 | $343.01 |
| 500+ | $2.9125 | $1456.25 |
| 1000+ | $2.6800 | $2680.00 |
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