My Inquiry
My Account
Texas Instruments LMP8640MK-H/NOPB
- Part No.:
- LMP8640MK-H/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMP8640MK-H/NOPB.pdf
- Description:
- IC CURR SENSE 1CIRC SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:697
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMP8640MK-H/NOPB from Texas Instruments is a precision high-side current sense amplifier with fixed 100 V/V gain, −2 V to +42 V common-mode input range, 0.25% max gain error, 900 µV input offset voltage, and 6-pin SOT-23 package. It enables accurate DC/AC current monitoring in battery-powered industrial power supplies and motor control feedback loops.
For engineers reviewing the LMP8640MK-H/NOPB datasheet, LMP8640MK-H/NOPB pinout, LMP8640MK-H/NOPB application, or LMP8640MK-H/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed use cases in high-voltage sensing, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The LMP8640MK-H/NOPB implements a differential-input, single-supply current-sense architecture with internal matched RIN resistors (5 kΩ each) and RG = 2×RIN feedback configuration. Its input stage operates over −2 V to +42 V common-mode voltage while powered from 2.7 V to 12 V supply rails.
It delivers 100 V/V fixed gain with 230 kHz bandwidth (at VSENSE = 13.5 mV), 1.8 V/µs slew rate (VS = 12 V), and maintains 103 dB CMRR across 2.1 V–42 V common-mode range. Output is rail-to-rail buffered for low-impedance driving of ADC inputs or analog controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V fixed - eliminates external resistor selection errors and ensures consistent signal scaling into downstream ADCs |
| Common-Mode Range | −2 V to +42 V - supports high-side sensing in 24 V/36 V/48 V industrial bus systems with negative transient tolerance |
| Max Gain Error | ±0.25% - guarantees ≤2.5 mV output error at 100 mV input for precision shunt-based current measurement |
| Input Offset Voltage | ±900 µV - limits baseline current measurement error to ≤9 µA when using 10 mΩ shunt resistor |
| Supply Voltage Range | 2.7 V to 12 V - compatible with 3.3 V microcontrollers and 5 V/12 V system rails without level-shifting |
| Bandwidth | 230 kHz - captures fast current transients in motor phase current or switching regulator ripple monitoring |
| CMRR | 103 dB (2.1 V–42 V) - rejects >99.9% of common-mode noise from noisy power rails during high-frequency switching |
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 | Buffered voltage output referenced to V−; drives 1 MΩ load with <100 mV headroom from rails |
| 2 - V− | Negative supply | Ground or negative rail reference; must be connected directly to system ground or low-side shunt node |
| 3 - +IN | Positive input | High-impedance sense node connected to shunt's high-side terminal; accepts up to +42 V common-mode |
| 4 - −IN | Negative input | High-impedance sense node connected to shunt's low-side terminal; tracks +IN within ±6 V differential limit |
| 5 - NC | No connect | Internally unconnected; must remain floating - no PCB trace or solder mask required |
| 6 - V+ | Positive supply | Single positive rail input (2.7–12 V); powers internal amplifier and output buffer |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100 V/V gain | Eliminates external gain-setting resistors, reducing BOM count and layout sensitivity to parasitic capacitance |
| −2 V to +42 V common-mode range | Enables direct high-side sensing on 24 V/36 V/48 V buses including negative fault transients without clamping diodes |
| 0.25% max gain error (25°C) | Ensures calibrated current measurement accuracy without per-unit trimming in production test |
| 900 µV max input offset | Supports sub-10 mA current resolution with 10 mΩ shunt at room temperature |
| 230 kHz bandwidth | Accurately reproduces PWM current waveforms up to 23 kHz fundamental frequency with <1% gain error |
| 103 dB CMRR (2.1–42 V) | Maintains signal integrity in presence of 40 Vpp switching noise on DC bus, critical for motor control FOC algorithms |
Applications
| Industrial Power Supply Monitoring | Brushless DC Motor Phase Current Sensing |
|---|---|
Use Scenario: Real-time current monitoring in 48 V telecom rectifiers and programmable DC supplies. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to scaled analog output for microcontroller ADC sampling. Use Value: Enables overcurrent protection response within 5 µs via 230 kHz bandwidth and rail-to-rail output swing. |
Use Scenario: Three-phase current feedback in field-oriented control (FOC) inverters for HVAC compressors. IC Role / Device Role / Timing Role: Precision 100× gain stage translating 10–50 mV shunt drops into 1–5 V ADC-compatible signals. Use Value: Delivers 0.25% gain accuracy and 103 dB CMRR to maintain torque linearity under 40 Vpp bus noise. |
| Battery Management System (BMS) Protection | Programmable Load Switch Current Limiting |
Use Scenario: Cell-string current monitoring in 36 V lithium-ion battery packs for charge/discharge cutoff. IC Role / Device Role / Timing Role: High-side sense amplifier interfacing between shunt and isolated sigma-delta ADC. Use Value: −2 V to +42 V common-mode range tolerates cell reversal faults and supports bidirectional current detection. |
Use Scenario: Accurate current limiting in hot-swap controllers and e-fuse ICs for server backplanes. IC Role / Device Role / Timing Role: Fixed-gain current monitor feeding comparator threshold or digital controller loop. Use Value: 900 µV offset enables 10 mA trip resolution with 100 mΩ sense resistor, minimizing power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | 100 V/V gain, −4 V to +80 V common-mode, 50 ppm/°C gain drift vs. LMP8640MK-H/NOPB's 26.2 ppm/°C | Higher common-mode range suits 60 V+ automotive systems; wider temp drift impacts precision over −40°C to 125°C | Select INA240A1IDR only if >42 V common-mode operation is required; otherwise LMP8640MK-H/NOPB offers superior thermal gain stability |
| MAX40056ATA+T | 100 V/V gain, −0.1 V to +65 V common-mode, 1.5 µV/°C offset drift vs. LMP8640MK-H/NOPB's 2.6 µV/°C | Lower offset drift improves long-term accuracy in thermally cycling environments; lacks AEC-Q100 qualification | Choose MAX40056ATA+T for extended temperature stability where automotive qualification is not mandatory |
Compared with INA240A1IDR and MAX40056ATA+T, the LMP8640MK-H/NOPB provides the lowest gain drift (26.2 ppm/°C) and tightest gain error (±0.25%) across −40°C to 125°C, making it optimal for industrial power supplies requiring stable calibration over life.
Availability
LMP8640MK-H/NOPB is available at Aetrix Electronics and suitable for industrial power supply monitoring, brushless DC motor phase current sensing, and battery management system (BMS) protection requiring stable component supply and guaranteed long-term sourcing.
Supply support for LMP8640MK-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 leader delivering analog and embedded processing solutions with focus on reliability, precision, and energy efficiency.
The LMP8640 series was designed specifically for high-accuracy, high-common-mode current sensing in industrial and consumer power systems where fixed-gain stability, low offset, and robust ESD performance are critical.
FAQ
What is the common-mode voltage range of the LMP8640MK-H/NOPB?
The LMP8640MK-H/NOPB supports a common-mode input voltage range of −2 V to +42 V. This allows direct high-side current sensing on 24 V, 36 V, and 48 V industrial buses, including tolerance for negative transients during fault conditions. The specification is validated per TI SNOSB28G datasheet Section 7.4 Recommended Operating Conditions.
Does the LMP8640MK-H/NOPB require external gain-setting resistors?
No, the LMP8640MK-H/NOPB features factory-trimmed fixed 100 V/V gain. Its internal resistor network (RIN = 5 kΩ, RG = 2×RIN) eliminates the need for external gain components, reducing layout sensitivity, part count, and calibration variability. This is confirmed in the Functional Block Diagram and Feature Description sections of the official datasheet.
What is the maximum bandwidth and slew rate of the LMP8640MK-H/NOPB?
The LMP8640MK-H/NOPB has a 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 faithful reproduction of fast current transients in motor control and switching power supply applications, as specified in Electrical Characteristics Table 7.6.
Can the LMP8640MK-H/NOPB operate from a 3.3 V supply?
Yes, the LMP8640MK-H/NOPB operates from 2.7 V to 12 V supply voltage. At 3.3 V, it maintains full functionality including 100 V/V gain, −2 V to +42 V common-mode range, and rail-to-rail output swing down to 40 mV above V−. This is verified in Section 7.4 Recommended Operating Conditions and Table 7.6 Electrical Characteristics at 2.7 V.
Is Pin 5 (NC) required to be grounded or left floating on the LMP8640MK-H/NOPB?
Pin 5 is Not Connected (NC) and must remain electrically floating - no connection to ground, supply, or any other net is permitted. The datasheet explicitly states "Not Internally Connected" in the Pin Functions table (Section 6), and connecting it risks undefined behavior or degraded performance due to internal node coupling.
LMP8640MK-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
LMP8640MK-H/NOPB FAQ
1.How can I place an order for LMP8640MK-H/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8640MK-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 LMP8640MK-H/NOPB reliable?
The price and inventory of LMP8640MK-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 LMP8640MK-H/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8640MK-H/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8640MK-H/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8640MK-H/NOPB?
LMP8640MK-H/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8640MK-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 LMP8640MK-H/NOPB?
For technical support, including LMP8640MK-H/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8640MK-H/NOPB requirements.
6.How does Aetrix verify that LMP8640MK-H/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8640MK-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 LMP8640MK-H/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8640MK-H/NOPB?
All LMP8640MK-H/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8640MK-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 LMP8640MK-H/NOPB part is unused and in its original packaging.
Return procedure for LMP8640MK-H/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMP8640MK-H/NOPB Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
