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Texas Instruments LMP8640HVMK-H/NOPB
- Part No.:
- LMP8640HVMK-H/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMP8640HVMK-H/NOPB.pdf
- Description:
- IC CURR SENSE 1CIRC SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
LMP8640HVMK-H/NOPB from Texas Instruments is a precision high-voltage current sense amplifier with fixed 100 V/V gain, designed for high-side sensing in systems with common-mode voltages up to 76 V and supply voltage range of 2.7 V to 12 V. It features ±900 µV input offset voltage, 0.25% max gain error, 103 dB CMRR (2.1 V–42 V), and operates across –40°C to +125°C - ideal for battery monitoring and motor control feedback loops.
For engineers reviewing the LMP8640HVMK-H/NOPB datasheet, LMP8640HVMK-H/NOPB pinout, LMP8640HVMK-H/NOPB application, or LMP8640HVMK-H/NOPB equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and confirmed alternative parts for industrial power management and automotive-grade current measurement designs.
Technical Context
The LMP8640HVMK-H/NOPB uses a precision differential input stage with matched 5 kΩ RIN resistors and internal RG = 2×RIN feedback configuration to achieve stable 100 V/V gain. Its architecture supports operation with input common-mode voltage as low as –2 V and as high as +76 V while maintaining rail-to-rail output swing capability under load.
It integrates a buffered voltage output stage with low output impedance, enabling direct interface to ADCs without external buffering. The device achieves 230 kHz bandwidth at 100 V/V gain with 1.8 V/µs slew rate (VS = 12 V), and maintains 95 dB CMRR across its full 76 V common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 100 V/V - eliminates external resistor selection errors and ensures consistent signal scaling for ADC input conditioning. |
| Common-Mode Voltage Range | –2 V to +76 V - enables direct sensing on high-side battery rails, DC bus lines, and industrial 48 V/60 V systems without level-shifting. |
| Input Offset Voltage | ±900 µV max at 25°C - minimizes baseline error in low-current detection (e.g., <10 mA through 100 mΩ shunt). |
| Gain Error | ±0.25% max - ensures accurate current reconstruction across temperature without calibration. |
| CMRR | 103 dB (2.1 V–42 V), 95 dB (2.1 V–76 V) - rejects noise from switching regulators and high-dv/dt transients in motor drives. |
| Supply Voltage Range | 2.7 V to 12 V - compatible with single-supply microcontrollers and low-power systems while supporting wide-input industrial supplies. |
| 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 ADC inputs or comparator thresholds directly. |
| V− | Negative supply | Ground reference for output stage; must be connected to system ground or negative rail. |
| +IN | Positive input | High-impedance node connected to high-side of sense resistor; accepts common-mode up to +76 V. |
| −IN | Negative 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 - no PCB trace or soldering required. |
| V+ | Positive supply | Power input for internal circuitry; decoupling capacitor (0.1 µF) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| High common-mode rejection | 103 dB CMRR over 2.1–42 V range ensures accurate current measurement despite noisy power rail coupling. |
| Low input bias current | 13 µA typical - minimizes voltage drop across high-value shunts and preserves accuracy in low-current applications. |
| Stable fixed-gain topology | 100 V/V gain set by internal 5 kΩ RIN and RG = 2×RIN - eliminates gain drift from external resistor tolerances and thermal coefficients. |
| Rail-to-rail output swing | Output swings within 40 mV of V− and 18.2 V below V+ (at VCM = 2.1 V) - maximizes dynamic range for 12 V supply systems. |
| Low supply current | 720–1050 µA at VS = 12 V and VCM = 2.1 V - enables integration into always-on battery monitoring circuits. |
Applications
| Battery Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Real-time monitoring of charge/discharge current in 48 V lithium-ion battery packs used in UPS and energy storage systems. 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 precise state-of-charge estimation and overcurrent protection with ±0.25% gain accuracy across temperature. | Use Scenario: Closed-loop phase current sensing in BLDC motor inverters operating from 60 V DC bus. IC Role / Device Role / Timing Role: High-bandwidth (230 kHz) current monitor feeding real-time PWM control loop with minimal latency. Use Value: Supports fast current limiting and torque regulation with 1.8 V/µs slew rate and 95 dB CMRR at full 76 V common-mode. |
| Industrial Power Supply Monitoring | Automotive 12 V/48 V Dual-Voltage Systems |
Use Scenario: Input current supervision in programmable DC power supplies delivering up to 20 A at 48 V output. IC Role / Device Role / Timing Role: Precision current amplifier interfacing shunt to isolated sigma-delta ADC via galvanic barrier. Use Value: Delivers ±900 µV offset and 26.2 ppm/°C gain drift stability - reduces need for per-unit calibration. | Use Scenario: Load current measurement on 48 V mild-hybrid vehicle subsystems (e.g., electric turbocharger, active suspension). IC Role / Device Role / Timing Role: AEC-Q100–compatible current sense front-end (LMP8640HV-H variant) for safety-critical diagnostics. Use Value: Withstands load dump transients up to +76 V common-mode and operates reliably from –40°C to +125°C. |
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 | 500 kHz bandwidth, 20 V/V or 50 V/V gain options, ±10 µV offset, AEC-Q100 Grade 0 | Higher bandwidth and lower offset, but only supports up to +80 V common-mode with reduced CMRR above 40 V | Select for automotive applications requiring higher precision and faster response where common-mode stays ≤40 V. |
| MAX40056ATA+T | 100 V/V gain, –5 V to +65 V common-mode, ±125 µV offset, 2.5 V to 5.5 V supply only | Lower offset and wider negative common-mode range, but incompatible with 12 V supply systems | Select when ultra-low offset is critical and supply is limited to 3.3 V or 5 V; not suitable for 12 V industrial designs. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LMP8640HVMK-H/NOPB provides superior CMRR (103 dB) at mid-range common-mode voltages and full 12 V supply compatibility - making it optimal for cost-sensitive industrial 48 V systems requiring robustness over absolute precision.
Availability
LMP8640HVMK-H/NOPB is available at Aetrix Electronics and suitable for battery monitoring, motor control feedback, and industrial power supply monitoring requiring stable component supply across extended temperature and high common-mode voltage conditions.
Supply support for LMP8640HVMK-H/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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers and power management ICs.
The LMP8640HV product line was engineered for high-side current sensing in industrial and automotive systems demanding extended common-mode voltage range (–2 V to +76 V) and fixed-gain accuracy without external components.
FAQ
What is the maximum common-mode voltage supported by the LMP8640HVMK-H/NOPB?
The LMP8640HVMK-H/NOPB supports a maximum common-mode voltage of +76 V and a minimum of –2 V. This specification is validated per TI's SNOSB28G datasheet and applies across the full operating temperature range (–40°C to +125°C). The device maintains specified CMRR and gain accuracy within this range, making it suitable for 48 V and 60 V industrial bus monitoring.
Does the LMP8640HVMK-H/NOPB require external gain-setting resistors?
No, the LMP8640HVMK-H/NOPB does not require external gain-setting resistors. It features an internally configured fixed gain of 100 V/V using matched 5 kΩ RIN resistors and RG = 2×RIN. This eliminates resistor tolerance errors and thermal drift, ensuring ±0.25% max gain error over temperature - a key design advantage confirmed in the LMP8640HVMK-H/NOPB datasheet Section 7.6.
What is the supply current consumption of the LMP8640HVMK-H/NOPB at 12 V supply and 2.1 V common-mode voltage?
At VS = 12 V and VCM = 2.1 V, the LMP8640HVMK-H/NOPB draws 720–1050 µA (typical 900 µA), as specified in Section 7.8 of the SNOSB28G datasheet. Current increases to 1250 µA at 125°C and remains within 2.8 mA maximum under worst-case VCM = –2 V conditions - enabling efficient use in always-on battery monitoring circuits.
Can the LMP8640HVMK-H/NOPB drive a 10 kΩ load directly?
Yes, the LMP8640HVMK-H/NOPB can drive a 10 kΩ load directly. Its buffered output stage delivers rail-to-rail swing (within 40 mV of V− and 18.2 V below V+) with low output impedance. Load regulation data (Figure 21–22) confirms <1 mV error at ±10 mA sink/source - well within specification for standard 10 kΩ ADC input loads.
Is the NC pin on the LMP8640HVMK-H/NOPB required to be grounded or left floating?
The NC pin (Pin 5) on the LMP8640HVMK-H/NOPB must be left floating - it is not internally connected and has no electrical function. Per Section 6 of the SNOSB28G datasheet, connecting this pin to any potential (including ground or V−) may compromise performance or reliability. No PCB trace, solder joint, or copper pour should contact Pin 5 in the LMP8640HVMK-H/NOPB layout.
LMP8640HVMK-H/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:
- 230 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-H/NOPB FAQ
1.How can I place an order for LMP8640HVMK-H/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8640HVMK-H/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-H/NOPB reliable?
The price and inventory of LMP8640HVMK-H/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-H/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8640HVMK-H/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8640HVMK-H/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8640HVMK-H/NOPB?
LMP8640HVMK-H/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8640HVMK-H/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-H/NOPB?
For technical support, including LMP8640HVMK-H/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8640HVMK-H/NOPB requirements.
6.How does Aetrix verify that LMP8640HVMK-H/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8640HVMK-H/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-H/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8640HVMK-H/NOPB?
All LMP8640HVMK-H/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8640HVMK-H/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-H/NOPB part is unused and in its original packaging.
Return procedure for LMP8640HVMK-H/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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