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Texas Instruments LMP8640HVMKE-F/NOPB
- Part No.:
- LMP8640HVMKE-F/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMP8640HVMKE-F/NOPB.pdf
- Description:
- IC CURR SENSE 1CIRC SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:1,313
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Product details
Overview
LMP8640HVMKE-F/NOPB from Texas Instruments is a precision high-voltage current sense amplifier designed for high-side sensing in DC-powered systems. It features fixed 50 V/V gain, −2 V to +76 V common-mode input range, 0.25% max gain error, 900 µV max input offset voltage, and operates from 2.7 V to 12 V supply. It is used in battery monitoring, motor control feedback loops, and industrial power management where accurate current measurement under high common-mode voltage is critical.
For engineers reviewing the LMP8640HVMKE-F/NOPB datasheet, LMP8640HVMKE-F/NOPB pinout, LMP8640HVMKE-F/NOPB application, or LMP8640HVMKE-F/NOPB equivalent, this page delivers verified specifications, functional context, package details, real-world use cases, and validated alternative options - all aligned with TI's SNOSB28G revision G datasheet and official device characterization.
Technical Context
The LMP8640HVMKE-F/NOPB implements a precision instrumentation amplifier topology optimized for high common-mode rejection at elevated voltages. Its internal architecture uses matched resistive feedback (RG = 2×RIN) and low-input-bias-current amplifiers to maintain accuracy across −2 V to +76 V VCM while delivering buffered output drive capability.
It supports three fixed-gain variants (20/50/100 V/V); this specific part is the 50 V/V version within the HV series. Gain accuracy is ensured over temperature (−40°C to +125°C), and CMRR remains ≥95 dB across its full common-mode range, with PSRR of 85 dB and input noise of 117 nV/√Hz above 10 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V fixed - enables direct scaling of 20 mV sense voltage to 1 V output, simplifying ADC interface design. |
| Common-Mode Input Range | −2 V to +76 V - supports high-side sensing in 48 V, 60 V, and telecom battery systems without level-shifting. |
| Max Gain Error | ±0.25% - ensures <1 mV absolute error on 400 mV full-scale output, critical for closed-loop current regulation. |
| Input Offset Voltage | ±900 µV max - limits worst-case sensing error to ≤18 µA when using 50 mΩ shunt at 50 VCM. |
| Supply Voltage Range | 2.7 V to 12 V - compatible with single-supply microcontrollers and low-power system rails. |
| Bandwidth | 450 kHz - supports fast transient detection in motor phase current monitoring and overcurrent protection. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient environments. |
Pinout & Package
Package: 6-pin Thin SOT-23 (2.9 mm × 1.6 mm), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Amplified output | Buffered voltage output referenced to V−; drives 1 MΩ load with <80 mV min output swing at 2.1 VCM. |
| V− | Negative supply | Ground reference for output stage; must be connected to system ground or negative rail. |
| +IN | Positive differential input | High-impedance node connected to high-side of sense resistor; bias current ≤22 µA. |
| −IN | Negative differential input | High-impedance node connected to low-side of sense resistor; forms differential pair with +IN. |
| NC | No connect | Internally unconnected pin; must remain floating or grounded per layout guidelines to avoid parasitic coupling. |
| V+ | Positive supply | Power input for internal circuitry; decoupling capacitor required within 1 cm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| High common-mode rejection | ≥95 dB CMRR up to +76 V VCM - maintains accuracy despite large supply rail fluctuations in battery-fed systems. |
| Low input offset drift | 2.6 µV/°C - limits total offset shift to <330 µV across full temperature range, reducing calibration burden. |
| Fixed-gain stability | 0.51% max gain error over temperature - eliminates external resistor tolerance effects and thermal tracking errors. |
| Robust ESD protection | ±2000 V HBM - meets industrial handling requirements without additional input protection circuitry. |
| Low quiescent current | 2.8 mA max at VCM = −2 V and TA = 125°C - enables always-on current monitoring in energy-sensitive applications. |
Applications
| Battery Management System (BMS) | Industrial Motor Drive |
|---|---|
Use Scenario: Monitoring charge/discharge current in 48 V lithium-ion battery packs with cell-level isolation. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to scaled analog output for MCU ADC sampling. Use Value: Enables ±0.5% current measurement accuracy across −40°C to +85°C ambient, supporting state-of-charge estimation and overcurrent shutdown. | Use Scenario: Phase current sensing in three-phase inverter stages for servo and pump drives. IC Role / Device Role / Timing Role: Real-time current feedback element in closed-loop field-oriented control (FOC) algorithm. Use Value: 450 kHz bandwidth and 1.6 V/µs slew rate support accurate current capture during PWM switching edges at 20 kHz carrier frequency. |
| Telecom Power Supply | Automotive Body Control Module (BCM) |
Use Scenario: Input current supervision in −48 V DC-DC converters for base station equipment. IC Role / Device Role / Timing Role: High-common-mode monitor placed between rectifier output and bulk capacitor. Use Value: −2 V to +76 V VCM range accommodates reverse-polarity fault conditions and transient overshoots without saturation. | Use Scenario: Load current monitoring for smart fuse replacement in 12 V vehicle subsystems (e.g., HVAC blower, seat motors). IC Role / Device Role / Timing Role: Fault-detection front-end feeding diagnostic logic in AEC-Q100-compliant control units. Use Value: Validated operation at 125°C junction temperature ensures reliability in engine-compartment-adjacent mounting locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 50 V/V gain, −4 V to +80 V VCM, 120 kHz bandwidth, 2.5 µV/°C offset drift | Lower bandwidth but superior CMRR (120 dB) and extended negative VCM for bidirectional sensing | Preferred for automotive AEC-Q100 Grade 0 designs requiring bidirectional current detection and higher noise immunity. |
| MAX40056ASA+T | 50 V/V gain, −0.1 V to +65 V VCM, 1 MHz bandwidth, 1.5 µV/°C offset drift | Higher speed and lower drift, but limited negative VCM and no HV-series qualification | Selected when >450 kHz response is needed in industrial PLC analog input modules with stable 0–65 V rails. |
Compared with LMP8640HVMKE-F/NOPB, INA240A1QDRQ1 offers wider negative common-mode range and automotive qualification but trades bandwidth; MAX40056ASA+T delivers faster response and tighter drift control but lacks extended HV rating and automotive compliance - choice depends on VCM polarity needs, speed requirements, and qualification scope.
Availability
LMP8640HVMKE-F/NOPB is available at Aetrix Electronics and suitable for battery management systems, industrial motor controls, and telecom power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for LMP8640HVMKE-F/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.
The LMP8640HV product line was engineered specifically for high-reliability, high-common-mode current sensing in industrial, telecom, and automotive power systems - emphasizing accuracy, thermal stability, and robustness across extreme operating conditions.
FAQ
What is the exact gain setting of the LMP8640HVMKE-F/NOPB?
The LMP8640HVMKE-F/NOPB is the 50 V/V fixed-gain variant of the LMP8640HV family. This is confirmed by TI's SNOSB28G datasheet Device Comparison Table and Electrical Characteristics sections, where "F" suffix denotes 50 V/V. The gain is internally trimmed and does not require external resistors - LMP8640HVMKE-F/NOPB delivers precise 50× scaling from differential input to buffered output.
Does the LMP8640HVMKE-F/NOPB support bidirectional current sensing?
No, the LMP8640HVMKE-F/NOPB is optimized for unidirectional high-side sensing. Its common-mode range extends down to −2 V, but it lacks symmetric input architecture or dedicated negative-sense capability. For true bidirectional operation, TI recommends the INA240 series - LMP8640HVMKE-F/NOPB requires external level-shifting or dual-supply configuration to resolve negative currents, which compromises its specified accuracy.
What is the maximum capacitive load the LMP8640HVMKE-F/NOPB can drive?
The LMP8640HVMKE-F/NOPB is characterized for stable operation with up to 30 pF output capacitance, as specified in the Electrical Characteristics tables across all supply voltages (2.7 V, 5 V, 12 V). Driving larger capacitive loads may cause peaking or oscillation; if higher CLOAD is required, an external buffer or RC isolation network must be added - LMP8640HVMKE-F/NOPB's internal compensation is optimized for 30 pF.
Is the NC pin on the LMP8640HVMKE-F/NOPB required to be left floating?
Yes, Pin 5 (NC) on the LMP8640HVMKE-F/NOPB is not internally connected and must remain electrically floating. TI's datasheet Pin Functions table explicitly states "Not Internally Connected." Grounding or routing signals to this pin risks introducing noise coupling or parasitic paths that degrade CMRR and offset performance - LMP8640HVMKE-F/NOPB layout guidelines recommend keeping NC unconnected and avoiding copper pours beneath it.
How does the LMP8640HVMKE-F/NOPB handle supply voltage transients?
The LMP8640HVMKE-F/NOPB tolerates supply transients within its Absolute Maximum Ratings: V+ to V− must stay between −0.3 V and 13.2 V. Fast transients exceeding 13.2 V risk latch-up or permanent damage. TI recommends a 100 nF ceramic decoupling capacitor placed within 1 cm of V+ and V− pins - LMP8640HVMKE-F/NOPB's PSRR of 85 dB helps suppress ripple-induced output errors below 100 µV at 100 kHz.
LMP8640HVMKE-F/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1.8V/µs
- Gain Bandwidth Product:
- 450 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 13 µA
- Voltage - Input Offset:
- 900 µV
- Current - Supply:
- 2.3mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMP8640HVMKE-F/NOPB FAQ
1.How can I place an order for LMP8640HVMKE-F/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8640HVMKE-F/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMP8640HVMKE-F/NOPB reliable?
The price and inventory of LMP8640HVMKE-F/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP8640HVMKE-F/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8640HVMKE-F/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8640HVMKE-F/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8640HVMKE-F/NOPB?
LMP8640HVMKE-F/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8640HVMKE-F/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMP8640HVMKE-F/NOPB?
For technical support, including LMP8640HVMKE-F/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8640HVMKE-F/NOPB requirements.
6.How does Aetrix verify that LMP8640HVMKE-F/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8640HVMKE-F/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMP8640HVMKE-F/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8640HVMKE-F/NOPB?
All LMP8640HVMKE-F/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8640HVMKE-F/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMP8640HVMKE-F/NOPB part is unused and in its original packaging.
Return procedure for LMP8640HVMKE-F/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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