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Texas Instruments LMP8640HVMKX-H/NOPB
- Part No.:
- LMP8640HVMKX-H/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMP8640HVMKX-H/NOPB.pdf
- Description:
- IC CURR SENSE 1CIRC SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:4,417
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Product details
Overview
LMP8640HVMKX-H/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 - designed for accurate high-side current monitoring in industrial power supplies and battery management systems.
For engineers reviewing the LMP8640HVMKX-H/NOPB datasheet, LMP8640HVMKX-H/NOPB pinout, LMP8640HVMKX-H/NOPB application, or LMP8640HVMKX-H/NOPB equivalent, key selection criteria include its extended 76 V common-mode capability, temperature-stable gain accuracy, low quiescent current at high VCM, and compatibility with shunt-based sensing in DC-fed motor drives and telecom rectifiers.
Technical Context
The LMP8640HVMKX-H/NOPB uses a precision current-feedback architecture with matched internal 5 kΩ RIN resistors and RG = 2×RIN to achieve fixed 100 V/V gain without external components. Its input stage operates with ±6 V differential input tolerance and supports common-mode voltages up to +76 V while maintaining 95 dB CMRR across the full range.
It delivers 230 kHz bandwidth at 100 V/V gain with 1.8 V/µs slew rate (VS = 12 V), buffered rail-to-rail output capable of sourcing/sinking ≥1 mA, and maintains <1.16 mV total input offset over –40°C to +125°C - enabling direct interface with 12-bit ADCs without calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 100 V/V - eliminates external gain-setting resistors and associated tolerance drift. |
| Common-Mode Range | –2 V to +76 V - supports high-side sensing in 48 V, 60 V, and telecom -48 V systems with reverse-polarity protection. |
| Max Gain Error | ±0.25% at 25°C - ensures ≤1 LSB error when digitizing 100 mV sense voltage with 12-bit ADC (4096 steps). |
| Input Offset Voltage | ±900 µV typical - enables accurate detection of sub-100 mA currents with 10 mΩ shunt. |
| Supply Voltage Range | 2.7 V to 12 V - compatible with single-supply microcontrollers and isolated bias rails. |
| Bandwidth | 230 kHz at 100 V/V - sufficient for PWM switching frequencies up to 20 kHz with <1% gain error. |
| Quiescent Current | 722 µA typical at VCM = 2.1 V, 12 V supply - enables always-on monitoring in battery-backed systems. |
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 <10 mV error. |
| V− | Negative supply | Ground or negative rail reference; must be connected even in single-supply operation. |
| +IN | Positive sense input | High-impedance input tied to high-side of shunt; accepts up to +76 V common-mode. |
| −IN | Negative sense input | High-impedance input tied to low-side of shunt; rejects common-mode via internal topology. |
| NC | No connect | Internally unconnected pin; must remain floating - no PCB trace or solder mask required. |
| V+ | Positive supply | Power supply input (2.7–12 V); decoupling capacitor recommended within 1 cm. |
Key Features
| Feature | Design Value |
|---|---|
| Extended common-mode range | –2 V to +76 V enables direct sensing on 48 V bus, telecom rectifiers, and industrial 60 V DC systems. |
| Fixed-gain topology | 100 V/V gain set by internal 5 kΩ RIN and RG = 2×RIN - eliminates resistor matching errors and layout sensitivity. |
| Low input bias current | 13 µA typical - minimizes voltage drop across high-value shunts (>1 Ω) used in low-current applications. |
| High CMRR | 95 dB from 2.1 V to 76 V common-mode - suppresses noise coupling from noisy power rails into measurement path. |
| Thermal stability | 26.2 ppm/°C gain drift - maintains accuracy across automotive and industrial temperature ranges without recalibration. |
Applications
| Industrial Power Supply Monitoring | Telecom Rectifier Current Sensing |
|---|---|
Use Scenario: Real-time current monitoring in 48 V distributed power architecture (DPA) modules with ±10% regulation tolerance. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to scaled analog output for system controller ADC. Use Value: Enables overcurrent shutdown within 10 µs using 230 kHz bandwidth and 1.8 V/µs slew rate - preventing MOSFET failure during short-circuit events. | Use Scenario: Bidirectional current measurement in -48 V telecom rectifier outputs with reverse-polarity fault detection. IC Role / Device Role / Timing Role: Precision current monitor operating down to –2 V common-mode to detect reverse current flow during hot-swap or battery backup transitions. Use Value: 76 V absolute maximum common-mode rating allows safe operation during transient surges up to +60 V without clamping or latch-up. |
| Battery Management System (BMS) | Motor Drive Phase Current Sensing |
Use Scenario: Cell-string current monitoring in 36 V–60 V lithium-ion battery packs with integrated protection ICs. IC Role / Device Role / Timing Role: High-accuracy analog front-end delivering 100× amplified shunt voltage to BMS MCU's SAR ADC. Use Value: ±900 µV input offset enables <10 mA resolution with 10 mΩ shunt - meeting UL 1973 charge/discharge accuracy requirements. | Use Scenario: High-side phase current sensing in 3-phase BLDC motor drives powered from 48 V DC bus. IC Role / Device Role / Timing Role: Fixed-gain current amplifier interfacing between low-inductance shunt and isolation amplifier input. Use Value: 0.25% gain error ensures consistent torque control across temperature, reducing field-oriented control (FOC) current loop variance to <0.5%. |
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 higher common-mode range and integrated EMI filtering | Select for automotive traction inverters where AEC-Q100 compliance and EMC robustness are mandatory. |
| MAX40056ATA+T | 100 V/V fixed gain, –0.1 V to +65 V common-mode, 500 kHz BW, 2.7 V to 5.5 V supply only | Higher bandwidth and lower supply voltage range; no support for 12 V operation | Select for high-speed servo drives requiring >300 kHz closed-loop response, where 12 V supply is unavailable. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LMP8640HVMKX-H/NOPB offers superior gain accuracy (±0.25% vs ±0.5%) and wider supply range (2.7–12 V), making it optimal for industrial power systems needing stable performance across variable input rails and ambient temperatures.
Availability
LMP8640HVMKX-H/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, battery management systems, and motor drive designs requiring stable component supply with guaranteed long-term availability.
Supply support for LMP8640HVMKX-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, power management, and signal chain solutions.
The LMP8640HV product line was engineered for high-reliability current sensing in industrial and telecom infrastructure, where extended common-mode voltage, gain stability over temperature, and minimal external component count are critical design constraints.
FAQ
What is the maximum common-mode voltage supported by the LMP8640HVMKX-H/NOPB?
The LMP8640HVMKX-H/NOPB supports a maximum common-mode input voltage of +76 V and a minimum of –2 V. This specification is validated per TI's SNOSB28G datasheet Section 7.1 Absolute Maximum Ratings and applies across the full operating temperature range (–40°C to +125°C). The device maintains functional performance up to this limit without latch-up or parametric degradation when VS = 12 V.
Does the LMP8640HVMKX-H/NOPB require external gain-setting resistors?
No, the LMP8640HVMKX-H/NOPB does not require external gain-setting resistors. It implements a fixed 100 V/V gain using internal matched 5 kΩ RIN resistors and RG = 2×RIN, as confirmed in the Functional Block Diagram (Section 8.2) and Feature Description (Section 8.3) of the SNOSB28G datasheet. This eliminates resistor tolerance, thermal drift, and PCB layout sensitivity inherent in discrete gain networks.
What is the typical supply current of the LMP8640HVMKX-H/NOPB at 12 V supply and 2.1 V common-mode voltage?
The typical supply current of the LMP8640HVMKX-H/NOPB is 722 µA under conditions of VS = 12 V and VCM = 2.1 V, as specified in Table 7.6 Electrical Characteristics 12 V (page 8, SNOSB28G). This value increases to 1050 µA at VCM = –2 V and remains stable across temperature - enabling low-power always-on monitoring in battery-backed systems.
Can the LMP8640HVMKX-H/NOPB be used with a single 3.3 V supply?
Yes, the LMP8640HVMKX-H/NOPB operates with a minimum supply voltage of 2.7 V, making it fully compatible with 3.3 V systems. At 3.3 V supply, its output swing is limited to approximately 3.0 V (VOUTMAX ≈ VS – 0.3 V), and common-mode rejection remains >95 dB across –2 V to +76 V, as verified in Section 7.6 Electrical Characteristics 2.7 V (page 5, SNOSB28G).
Is Pin 5 (NC) required to be left unconnected on the LMP8640HVMKX-H/NOPB?
Yes, Pin 5 (NC) on the LMP8640HVMKX-H/NOPB is internally not connected and must remain unconnected on the PCB. As stated in Section 6 Pin Configuration and Functions (page 3, SNOSB28G), "NC: Not Internally Connected." No trace, solder mask opening, or thermal pad should be assigned to this pin - doing so may introduce parasitic coupling or mechanical stress.
LMP8640HVMKX-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:
- Active
- 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
LMP8640HVMKX-H/NOPB FAQ
1.How can I place an order for LMP8640HVMKX-H/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8640HVMKX-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 LMP8640HVMKX-H/NOPB reliable?
The price and inventory of LMP8640HVMKX-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 LMP8640HVMKX-H/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8640HVMKX-H/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8640HVMKX-H/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8640HVMKX-H/NOPB?
LMP8640HVMKX-H/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8640HVMKX-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 LMP8640HVMKX-H/NOPB?
For technical support, including LMP8640HVMKX-H/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8640HVMKX-H/NOPB requirements.
6.How does Aetrix verify that LMP8640HVMKX-H/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8640HVMKX-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 LMP8640HVMKX-H/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8640HVMKX-H/NOPB?
All LMP8640HVMKX-H/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8640HVMKX-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 LMP8640HVMKX-H/NOPB part is unused and in its original packaging.
Return procedure for LMP8640HVMKX-H/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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