LT1999IMS8-20F#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1999IMS8-20F#PBF is a high-voltage bidirectional current sense amplifier with a fixed gain of 20, engineered for pin-level FMEA robustness. Provides 105 dB CMRR and 1500 µV max input offset in an 8-pin MSOP package. Available from stock worldwide with fast shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1999IMS8-20F#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.9900(MOQ 19)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT1999IMS8-20F#PBF?
- Bidirectional current sensing with fixed 20x gain enables monitoring of both charge and discharge currents without external resistor networks
- High-voltage common-mode input range tolerates bus voltages well above the supply rail for direct shunt monitoring on 12 V to 60 V power lines
- Pin FMEA engineering ensures safe operation under single-pin fault conditions, meeting stringent automotive and industrial safety standards
What is LT1999IMS8-20F#PBF used for?
The LT1999IMS8-20F#PBF is purpose-built for high-side and low-side bidirectional current monitoring in motor drives, battery management systems, and industrial power converters. Its FMEA-hardened design makes it a natural choice for functional-safety applications in automotive powertrain and ADAS systems where a single pin fault must not cause catastrophic failure. The compact 8-pin MSOP package and fixed 20x gain reduce external component count and simplify signal-chain calibration.
What are the specifications of LT1999IMS8-20F#PBF?
| 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 |
| 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 | INDUSTRIAL |
| 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 |
| Country of Origin | Malaysia |
Where can I find the LT1999IMS8-20F#PBF datasheet?
LT1999IMS8-20F#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT1999IMS8-20F#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the fixed gain of 20 in the LT1999IMS8-20F#PBF mean for shunt resistor selection?
With a fixed gain of 20, the LT1999IMS8-20F#PBF amplifies the shunt voltage drop by exactly 20x before the ADC input. For a 100 mA to 10 A measurement range with a 10 mOhm shunt, the output spans 20 mV to 2 V, fitting neatly within a 2.5 V reference ADC range and requiring no external gain-setting resistors, which reduces PCB area and eliminates resistor mismatch errors.
How does the 105 dB CMRR of the LT1999IMS8-20F#PBF prevent measurement errors on a noisy 48 V automotive bus?
At 105 dB typical CMRR, the LT1999IMS8-20F#PBF attenuates 48 V common-mode bus noise by more than 177,000x relative to the differential shunt signal. Even with 1 V peak-to-peak switching noise on the bus, the error at the output is below 6 µV referred to input, keeping current measurement accuracy within 0.1% for milliohm-range shunt resistors in high-current automotive applications.
In what scenario should a designer choose the 20x gain variant over a 10x or 50x gain LT1999 variant?
The 20x gain variant of the LT1999 is the best match when the full-scale shunt voltage is between 75 mV and 125 mV, mapping the output into the 1.5 V to 2.5 V ADC range common on 2.5 V or 3.3 V microcontrollers. A 10x variant would under-utilize ADC dynamic range with small shunts, while a 50x variant saturates with shunt voltages above 50 mV, so 20x covers the widest shunt impedance range for 5 A to 20 A measurement applications.
Related Guides
CDSOT23-SM712 Selection Guide: Choosing an RS-485 TVS Array
Compare CDSOT23-SM712 and SM712-family TVS arrays by voltage window, clamping, surge rating, layout, and supply risk.
Jul 20, 2026
CR0805-FX-10R0ELF Selection Guide: Choosing a 10 Ohm 0805 Resistor
Select the CR0805-FX-10R0ELF by checking power, pulse load, tolerance, TCR, layout, and sourcing requirements.
Jul 20, 2026
CDSOT23-SM712 RS-485 Interface Protection Design Guide
Design robust RS-485 protection with CDSOT23-SM712 using correct clamping, placement, grounding, termination, and surge coordination.
Jul 17, 2026
CR0805-FX-10R0ELF 10 Ohm 0805 Resistor Design Guide
Design CR0805-FX-10R0ELF into 0805 circuits with practical power, pulse, thermal, layout, tolerance, and sourcing checks.
Jul 17, 2026
Why Buy from FindMyChip
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.
More from Analog Devices
LT3062EDCB#TRPBF
Small Outline No-lead
Integrated Circuit
LT3062EDCB#TRMPBF
Small Outline No-lead
Integrated Circuit
LT8641IUDC#TRPBF
Other
Integrated Circuit
HMC412AMS8GTR
Small Outline Packages
Integrated Circuit
LT3062HMS8E#PBF
Small Outline Packages
Integrated Circuit
LT3062IMS8E#PBF
Small Outline Packages
Integrated Circuit
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 19+ | $3.9600 | $75.24 |
| 250+ | $3.3844 | $846.10 |
| 500+ | $3.2500 | $1625.00 |
| 1000+ | $2.9900 | $2990.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit