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Texas Instruments LMP8640HVMK-F/NOPB
- Part No.:
- LMP8640HVMK-F/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMP8640HVMK-F/NOPB.pdf
- Description:
- IC CURR SENSE 1CIRC SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:4,427
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Product details
Overview
LMP8640HVMK-F/NOPB from Texas Instruments is a precision high-voltage current sense amplifier with 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 6-pin SOT-23 package - designed for accurate high-side current monitoring in industrial power supplies and battery management systems.
For engineers reviewing the LMP8640HVMK-F/NOPB datasheet, LMP8640HVMK-F/NOPB pinout, LMP8640HVMK-F/NOPB application, or LMP8640HVMK-F/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and electrical performance across temperature, and real-world design context for high-common-mode DC current sensing.
Technical Context
The LMP8640HVMK-F/NOPB implements a precision current-sense architecture using matched internal resistors (RIN = 5 kΩ) and a high-CMRR error amplifier to reject common-mode transients while amplifying small differential voltages across a shunt resistor. Its fixed-gain topology eliminates external gain-setting components and ensures stable accuracy over temperature.
It operates from a single 2.7 V to 12 V supply, supports output sourcing/sinking up to ±10 mA, maintains 103 dB CMRR at 2.1–42 V common-mode, and delivers 450 kHz bandwidth with 1.6 V/µs slew rate at 5 V supply - enabling fast response to load-current changes without oscillation or settling delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 50 V/V - eliminates external resistor network, guarantees gain stability across temperature and supply variation |
| Common-Mode Range | -2 V to +76 V - enables direct sensing on high-side of 48 V, 60 V, or 72 V bus systems without level-shifting |
| Max Gain Error | ±0.25% at 25°C - ensures <1 mV absolute error for 20 mV sense voltage, critical for ±1% current measurement accuracy |
| Input Offset Voltage | ±900 µV max - limits worst-case current measurement error to ≤18 µA when Rs = 50 mΩ |
| Supply Voltage Range | 2.7 V to 12 V - compatible with 3.3 V, 5 V, and 12 V system rails; no separate high-voltage bias required |
| Bandwidth | 450 kHz at 5 V supply - supports real-time monitoring of PWM motor currents and fast transient load events |
| Operating Temperature | -40°C to +125°C - qualified for industrial and extended-temperature embedded power control 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 |
|---|---|---|
| 1 - VOUT | Amplified output voltage | Buffered low-impedance source/sink capable of driving 1 MΩ load or ADC input directly; rail-to-rail swing limited by supply and common-mode |
| 2 - V− | Negative supply terminal | Reference node for internal circuitry; must be connected to system ground or negative rail; not floating |
| 3 - +IN | Positive input | High-impedance node connected to shunt resistor high-side; accepts common-mode up to +76 V |
| 4 - −IN | Negative input | High-impedance node connected to shunt resistor low-side; differential input rejects common-mode noise |
| 5 - NC | No internal connection | Unbonded pin; must remain unconnected per datasheet; no routing or grounding allowed |
| 6 - V+ | Positive supply terminal | Single-supply input (2.7–12 V); powers internal amplifier and output buffer; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| High common-mode rejection | 103 dB CMRR (2.1–42 V range) - suppresses bus ripple and switching noise in noisy power-conversion environments |
| Low input bias current | 13 µA typical - minimizes voltage drop across high-value shunt resistors, preserving measurement linearity |
| Power supply rejection | 85 dB PSRR - prevents supply rail noise from coupling into output, critical for shared 5 V or 12 V domains |
| Thermal stability | 26.2 ppm/°C gain drift - ensures consistent scaling across full -40°C to +125°C operating range |
| Differential input impedance | 5 kΩ - defines minimum shunt resistance for optimal noise/error trade-off and avoids loading effects |
Applications
| Industrial Power Supply Monitoring | Battery Management System (BMS) |
|---|---|
|
Use Scenario: Real-time current monitoring on the high-side of a 48 V telecom rectifier output stage to detect overcurrent faults and enable fast shutdown. IC Role / Device Role / Timing Role: High-side current sense amplifier converting 10–100 mV shunt voltage to 0.5–5 V analog output for microcontroller ADC sampling at 10 kHz. Use Value: Enables ±1% current accuracy over temperature without calibration, reducing BOM count and firmware compensation complexity. |
Use Scenario: Cell-string current measurement in a 16S lithium-ion battery pack where common-mode voltage reaches 65 V during charging. IC Role / Device Role / Timing Role: Fixed-gain current sensor interfacing between shunt resistor and isolated sigma-delta ADC, operating continuously at 125°C ambient. Use Value: Eliminates need for isolated amplifiers or discrete op-amp solutions, cutting isolation component cost by >40%. |
| Motor Drive Phase Current Sensing | Programmable Logic Controller (PLC) I/O Module |
|
Use Scenario: High-side phase current feedback in a 3-phase inverter driving a 7.5 kW induction motor with 600 V DC bus. IC Role / Device Role / Timing Role: Fast-response current monitor providing 450 kHz bandwidth signal to gate driver protection logic for cycle-by-cycle overcurrent limiting. Use Value: Supports sub-microsecond fault detection due to 1.6 V/µs slew rate and minimal propagation delay, improving system safety integrity. |
Use Scenario: 4–20 mA loop-powered analog input module requiring precise current measurement under varying field wiring conditions. IC Role / Device Role / Timing Role: High-common-mode amplifier rejecting ground-loop noise and cable-induced CM transients in factory-floor environments. Use Value: Delivers 103 dB CMRR at 50/60 Hz, eliminating 99.9% of induced interference without external filtering or shielding. |
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 CM range, 120 kHz bandwidth, AEC-Q100 Grade 1 | Automotive-qualified; lower bandwidth but higher ESD robustness (4 kV HBM) | Preferred for automotive battery disconnect units; unsuitable for high-speed motor control due to bandwidth limitation |
| MAX40056ATA+T | 50 V/V gain, -0.1 V to +65 V CM range, 1.5 MHz bandwidth, 2.5 µV/°C offset drift | Higher bandwidth and lower noise, but narrower common-mode range and no HV option beyond 65 V | Best for high-frequency servo drives needing >1 MHz response; not viable for 72 V bus monitoring |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LMP8640HVMK-F/NOPB offers superior common-mode range (up to +76 V) and tighter gain error (±0.25%), making it uniquely suited for industrial 48–72 V systems where accuracy and voltage margin outweigh raw speed or automotive qualification.
Availability
LMP8640HVMK-F/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, motor control inverters, and programmable logic controller I/O modules requiring stable component supply with guaranteed long-term availability.
Supply support for LMP8640HVMK-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 amplifiers and power management ICs.
The LMP8640 family was engineered specifically for high-accuracy, high-common-mode current sensing in industrial and infrastructure equipment - prioritizing gain stability, thermal performance, and robustness over wide supply and temperature ranges.
FAQ
What is the maximum common-mode voltage supported by the LMP8640HVMK-F/NOPB?
The LMP8640HVMK-F/NOPB supports a maximum common-mode input voltage of +76 V and a minimum of -2 V. This rating is explicitly specified for the LMP8640HV variant in the official TI datasheet SNOSB28G, confirming its suitability for 48 V, 60 V, and 72 V bus monitoring without external attenuation or level-shifting circuitry.
Does the LMP8640HVMK-F/NOPB require external gain-setting resistors?
No, the LMP8640HVMK-F/NOPB has a factory-trimmed fixed gain of 50 V/V. Its internal RIN resistors (5 kΩ each) and RG = 2×RIN configuration eliminate the need for external components, ensuring repeatable gain accuracy of ±0.25% and removing layout sensitivity to parasitic capacitance or resistor tolerance.
Can the LMP8640HVMK-F/NOPB operate from a 3.3 V supply?
Yes, the LMP8640HVMK-F/NOPB is fully specified down to 2.7 V supply voltage. At 3.3 V, it maintains 450 kHz bandwidth, 1.4 V/µs slew rate, and retains full common-mode range (-2 V to +76 V), enabling direct interface with 3.3 V microcontrollers and low-power industrial sensors.
What is the function of Pin 5 (NC) on the LMP8640HVMK-F/NOPB?
Pin 5 is marked NC (No Connection) and is not internally bonded. The TI datasheet explicitly states it must remain unconnected - neither grounded nor routed - to avoid compromising device reliability, thermal performance, or ESD robustness. PCB layout must isolate this pad with no copper or via.
How does the LMP8640HVMK-F/NOPB handle output loading?
The LMP8640HVMK-F/NOPB features a buffered output capable of sourcing or sinking ±10 mA while maintaining linearity. It drives 1 MΩ loads directly and supports up to 30 pF capacitive load; for heavier loads or longer traces, a series resistor near the output is recommended to prevent instability.
LMP8640HVMK-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
LMP8640HVMK-F/NOPB FAQ
1.How can I place an order for LMP8640HVMK-F/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8640HVMK-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 LMP8640HVMK-F/NOPB reliable?
The price and inventory of LMP8640HVMK-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 LMP8640HVMK-F/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8640HVMK-F/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8640HVMK-F/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8640HVMK-F/NOPB?
LMP8640HVMK-F/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8640HVMK-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 LMP8640HVMK-F/NOPB?
For technical support, including LMP8640HVMK-F/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8640HVMK-F/NOPB requirements.
6.How does Aetrix verify that LMP8640HVMK-F/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8640HVMK-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 LMP8640HVMK-F/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8640HVMK-F/NOPB?
All LMP8640HVMK-F/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8640HVMK-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 LMP8640HVMK-F/NOPB part is unused and in its original packaging.
Return procedure for LMP8640HVMK-F/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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