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Texas Instruments LMP8640HVMKE-T/NOPB
- Part No.:
- LMP8640HVMKE-T/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMP8640HVMKE-T/NOPB.pdf
- Description:
- IC CURR SENSE 1CIRC SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:2,607
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Product details
Overview
LMP8640HVMKE-T/NOPB from Texas Instruments is a precision high-voltage current sense amplifier with fixed 100 V/V gain, -2 V to +76 V common-mode input range, 0.25% max gain error, 900 µV input offset voltage, and 6-pin SOT-23 package. It enables accurate high-side current monitoring in industrial power supplies and battery management systems where wide common-mode voltage and temperature-stable gain are critical.
For engineers reviewing the LMP8640HVMKE-T/NOPB datasheet, LMP8640HVMKE-T/NOPB pinout, LMP8640HVMKE-T/NOPB application, or LMP8640HVMKE-T/NOPB equivalent, key selection criteria include its 100 V/V fixed gain configuration, 76 V max common-mode voltage capability, 230 kHz bandwidth at 100 V/V, low 2.6 µV/°C offset drift, and compatibility with 2.7–12 V single-supply operation.
Technical Context
The LMP8640HVMKE-T/NOPB implements a precision current-sense topology using matched internal resistors (RIN = 5 kΩ) and a high-CMRR instrumentation amplifier core. Its differential input stage rejects common-mode voltages up to +76 V while amplifying small mV-level sense resistor drops with minimal offset and drift.
It operates as a single-ended buffered voltage output device with rail-to-rail output swing capability (e.g., 40 mV min / 11.85 V max at VS = 12 V), optimized for direct interface to ADCs or microcontroller analog inputs without external level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 100 V/V - delivers 1 V output per 10 mV sense voltage; eliminates external gain-setting components and calibration uncertainty. |
| Common-Mode Input Range | -2 V to +76 V - supports high-side sensing in 48 V, 60 V, and 72 V industrial and telecom power rails. |
| Max Gain Error | ±0.25% at 25°C - ensures ≤2.5 mV error on 1 V output; critical for <1% current measurement accuracy. |
| Input Offset Voltage | ±900 µV max - contributes ≤9 µV error at 100× gain; enables resolution down to ~90 µA with 100 mΩ shunt. |
| Bandwidth | 230 kHz at 100 V/V - supports fast transient detection in motor control and overcurrent protection circuits. |
| Supply Voltage Range | 2.7 V to 12 V - compatible with standard 3.3 V and 5 V logic supplies; no separate high-voltage bias required. |
| CMRR | 95 dB (2.1 V to 76 V) - suppresses >30,000:1 common-mode interference, essential for noisy high-power 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 (Pin 1) | Amplified output | Buffered voltage output; drives 1 MΩ load with ≤30 pF capacitive load; connects directly to ADC input. |
| V− (Pin 2) | Negative supply | Ground reference for single-supply operation; must be connected to system GND or negative rail. |
| +IN (Pin 3) | Positive sense input | High-impedance node connected to high-side of shunt resistor; tolerates up to +76 V common-mode. |
| −IN (Pin 4) | Negative sense input | High-impedance node connected to low-side of shunt resistor; forms differential pair with +IN. |
| NC (Pin 5) | No connect | Internally unconnected; must remain floating-no PCB trace or component allowed. |
| V+ (Pin 6) | Positive supply | Single supply input (2.7–12 V); powers internal amplifier and output buffer; decoupling capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| High common-mode voltage support | Operates with inputs up to +76 V relative to V−, enabling direct high-side sensing in 48–72 V systems without level shifters. |
| Fixed-gain architecture | 100 V/V gain is laser-trimmed and temperature-compensated, eliminating external resistor matching errors and layout sensitivity. |
| Low offset drift | 2.6 µV/°C TCVOS ensures <1.2 mV total offset variation across −40°C to +125°C, preserving accuracy in thermal cycling environments. |
| High PSRR and CMRR | 85 dB PSRR and 95 dB CMRR minimize output error from supply ripple and bus noise-critical in switch-mode power applications. |
| Robust ESD rating | ±1250 V CDM and ±2000 V HBM (per JEDEC JEP155) ensure reliability during automated assembly and field handling. |
Applications
| Industrial Power Supply Monitoring | Battery Management System (BMS) |
|---|---|
Use Scenario: Real-time current monitoring in 48 V DC-DC converters and telecom rectifiers with bus voltages up to 72 V. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to scaled analog output for system controller. Use Value: Enables ±0.5% full-scale current measurement accuracy across temperature without recalibration, supporting predictive maintenance and efficiency optimization. | Use Scenario: Cell-string current sensing in lithium-ion battery packs for EVs and energy storage, operating at 50–60 V nominal. IC Role / Device Role / Timing Role: Precision analog front-end for coulomb counting and overcurrent protection triggering. Use Value: 100 V/V gain and 76 V common-mode range allow direct connection to high-side shunt, reducing BOM count and PCB area versus isolated solutions. |
| Motor Drive Phase Current Sensing | Server PSU Output Current Monitoring |
Use Scenario: Shunt-based phase current feedback in 3-phase BLDC inverters with 60 V bus and fast PWM switching. IC Role / Device Role / Timing Role: High-bandwidth (230 kHz) current amplifier feeding ADC for field-oriented control (FOC) algorithms. Use Value: 230 kHz bandwidth supports accurate sampling of distorted current waveforms under PWM, improving torque ripple suppression. | Use Scenario: Output current telemetry in 12 V/48 V server power supplies compliant with PMBus v1.3. IC Role / Device Role / Timing Role: Analog current sense element interfacing to digital power controller via external ADC. Use Value: Low 900 µV offset and 0.25% gain error meet PMBus accuracy requirements for real-time power budgeting and fault logging. |
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 fixed gain, −4 V to +80 V common-mode, 120 kHz BW, AEC-Q100 Grade 1 | Automotive-qualified; lower bandwidth but wider common-mode range and higher ESD immunity | Select for automotive battery disconnect units or traction inverter monitoring where AEC-Q100 compliance is mandatory. |
| MAX40056ATA+T | 100 V/V fixed gain, −0.1 V to +65 V common-mode, 400 kHz BW, 1.5 µV/°C TCVOS | Higher bandwidth and better noise performance; narrower common-mode range than LMP8640HVMKE-T/NOPB | Select for high-speed industrial servo drives requiring faster settling and lower noise, where 65 V max common-mode suffices. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LMP8640HVMKE-T/NOPB offers the widest common-mode range (−2 V to +76 V) among 100 V/V gain options and best-in-class gain accuracy (±0.25%), making it optimal for high-reliability industrial power systems demanding long-term stability without automotive qualification overhead.
Availability
LMP8640HVMKE-T/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, and motor control applications requiring stable component supply, extended temperature operation (−40°C to +125°C), and high common-mode voltage tolerance.
Supply support for LMP8640HVMKE-T/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 designed specifically for high-side current sensing in industrial and telecom infrastructure where wide common-mode voltage, fixed-gain accuracy, and robust thermal performance are non-negotiable.
FAQ
What is the maximum common-mode voltage supported by the LMP8640HVMKE-T/NOPB?
The LMP8640HVMKE-T/NOPB supports a maximum common-mode input voltage of +76 V relative to V−, with a minimum of −2 V. This allows direct high-side sensing in 48 V, 60 V, and 72 V power systems without external level-shifting circuitry. The specification is validated across the full −40°C to +125°C operating temperature range and applies to both +IN and −IN pins.
Does the LMP8640HVMKE-T/NOPB require external gain-setting resistors?
No, the LMP8640HVMKE-T/NOPB features factory-laser-trimmed fixed gain of 100 V/V. No external resistors are needed-its internal RIN network (5 kΩ each) and precision amplifier core deliver guaranteed ±0.25% gain error at 25°C and ±0.51% over temperature. This eliminates resistor matching errors, layout sensitivity, and calibration overhead in production.
What is the bandwidth and slew rate of the LMP8640HVMKE-T/NOPB at 100 V/V gain?
At 100 V/V gain, the LMP8640HVMKE-T/NOPB has a small-signal bandwidth of 230 kHz (measured at VSENSE = 13.5 mV, CL = 30 pF, RL = 1 MΩ) and a slew rate of 1.8 V/µs (at VS = 12 V). These values enable accurate capture of fast current transients in motor control and overcurrent protection applications without distortion.
Can the LMP8640HVMKE-T/NOPB operate from a 3.3 V supply?
Yes, the LMP8640HVMKE-T/NOPB operates from 2.7 V to 12 V single supply. At 3.3 V, it maintains full functionality including 100 V/V gain, −2 V to +76 V common-mode range, and specified offset/bandwidth performance. Output swing is limited to ~3.25 V max and 40 mV min, which remains compatible with most 3.3 V ADC references.
Is Pin 5 (NC) required to be left unconnected on the LMP8640HVMKE-T/NOPB?
Yes, Pin 5 is designated NC (Not Internally Connected) and must remain unconnected-no trace, pad, or component should be attached. TI's datasheet explicitly states it is not bonded internally; routing or loading this pin may cause unpredictable behavior or reduced ESD robustness. PCB layout must isolate Pin 5 completely.
LMP8640HVMKE-T/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:
- 950 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-T/NOPB FAQ
1.How can I place an order for LMP8640HVMKE-T/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8640HVMKE-T/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-T/NOPB reliable?
The price and inventory of LMP8640HVMKE-T/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-T/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8640HVMKE-T/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8640HVMKE-T/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8640HVMKE-T/NOPB?
LMP8640HVMKE-T/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8640HVMKE-T/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-T/NOPB?
For technical support, including LMP8640HVMKE-T/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8640HVMKE-T/NOPB requirements.
6.How does Aetrix verify that LMP8640HVMKE-T/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8640HVMKE-T/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-T/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8640HVMKE-T/NOPB?
All LMP8640HVMKE-T/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8640HVMKE-T/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-T/NOPB part is unused and in its original packaging.
Return procedure for LMP8640HVMKE-T/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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