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Texas Instruments LMP8480MMX-T/NOPB
- Part No.:
- LMP8480MMX-T/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMP8480MMX-T/NOPB.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,099
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Product details
Overview
LMP8480MMX-T/NOPB from Texas Instruments is a unidirectional, high-side current sense amplifier with fixed 20V/V gain, 76V common-mode input range (4.0V–76V), ±80µV input offset voltage, and 270kHz bandwidth-designed for precision vehicle battery monitoring and telecom power rail sensing where supply and sensed voltage share the same rail.
For engineers reviewing the LMP8480MMX-T/NOPB datasheet, LMP8480MMX-T/NOPB pinout, LMP8480MMX-T/NOPB application, or LMP8480MMX-T/NOPB equivalent, key selection criteria include its 20V/V fixed gain accuracy (±0.6% over temperature), ultra-low quiescent current (<100µA), buffered 5mA output drive, and compatibility with 4.5V–76V single-supply operation without auxiliary bias rails.
Technical Context
The LMP8480MMX-T/NOPB implements a two-stage architecture: first, a precision thin-film resistor-based voltage-to-current converter referenced to input common-mode voltage; second, a differential amplifier with internal 14V LDO and x5 gain stage followed by level-shifting output. Its input stage uses matched RGP/RGN resistors (98.38kΩ) and VCM-sense resistors (491.9kΩ) to reject common-mode variations while preserving differential signal integrity.
Unlike bidirectional variants, the LMP8480MMX-T/NOPB internally grounds both VREF pins-eliminating external reference circuitry and fixing output zero at GND for unidirectional current flow. This simplifies design in applications like motor phase current monitoring and solar charge controller shunt sensing where polarity is known and fixed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 20V/V - enables direct scaling of 50mV sense voltage to 1V output, reducing ADC full-scale error. |
| Input Offset Voltage | ±80µV (typ) - supports use of <5mΩ shunts in 10A systems without sacrificing <0.1% measurement accuracy. |
| Common-Mode Range | 4.0V to 76V - allows direct connection to 12V/24V/48V automotive and telecom bus rails without level-shifting. |
| Bandwidth | 270kHz (–3dB) - captures fast transients in motor control PWM cycles up to 50kHz with minimal phase lag. |
| Supply Voltage Range | 4.5V to 76V - permits powering from monitored rail (e.g., 48V battery), eliminating isolated bias supplies. |
| Quiescent Current | <100µA - enables always-on battery monitoring in energy-constrained telematics modules. |
| Output Drive | >5mA buffered sink/source - drives 10kΩ ADC inputs or long PCB traces without external buffers. |
Pinout & Package
Package: 8-pin VSSOP (3.00mm × 3.00mm), surface-mount, RoHS-compliant, thermal resistance θJA = 185°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RSP | Positive current sense input | High-impedance node connected to high-side of shunt; tolerates 76V common-mode with 7µA bias current. |
| 2 - VCC | Positive supply voltage | Accepts 4.5V–76V; powers internal 14V LDO and amplifier stages-can be tied directly to monitored rail. |
| 3 - NC | No connection | Not internally bonded; must remain floating-no routing or stitching required. |
| 4 - GND | Ground reference | Return path for supply and output; requires low-impedance Kelvin connection to shunt ground terminal. |
| 5 - VOUT | Voltage output | Buffered rail-to-rail capable output; delivers >5mA while maintaining linearity across 0–VCC–0.23V range. |
| 6 - NC | No connection (LMP8480) | Internally disconnected; matches LMP8481's REFB pin location but unused-leave unconnected. |
| 7 - NC | No connection (LMP8480) | Internally disconnected; matches LMP8481's REFA pin location but unused-leave unconnected. |
| 8 - RSN | Negative current sense input | High-impedance node connected to low-side of shunt; maintains CMRR >124dB up to 76V common-mode. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional sensing architecture | Zero-output baseline at no current eliminates need for external reference or dual-supply support. |
| Integrated 14V LDO regulation | Stabilizes internal analog core against supply ripple-enables clean output even when VCC sags during load dumps. |
| PSRR = 122dB (DC) | Rejects supply noise from 48V telecom rectifiers without additional filtering, preserving measurement SNR. |
| CMRR = 124dB (DC) | Maintains accuracy despite 76V bus noise coupling into shunt-critical for high-noise industrial motor drives. |
| Input bias current = 7µA | Minimizes voltage drop error across high-value shunts (>100mΩ) used in low-current precision sensing. |
Applications
| Automotive Battery Monitoring | Telecom 48V DC-DC Supervision |
|---|---|
|
Use Scenario: Real-time monitoring of starter battery leakage current and alternator output in 12V/24V vehicles. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to proportional analog output for MCU ADC sampling. Use Value: Enables detection of sub-10mA parasitic drain with ±0.5% total error over –40°C to 125°C, supporting ISO 16750-2 compliance. |
Use Scenario: Continuous current supervision of primary 48V telecom power distribution units feeding base station radios. IC Role / Device Role / Timing Role: Unidirectional high-side sensor interfacing between 48V bus and isolated ADC via optocoupler or digital isolator. Use Value: Delivers 270kHz bandwidth to capture transient overloads during RF burst transmission, preventing false shutdowns. |
| Solar Charge Controller Shunt Sensing | Industrial Motor Phase Current Feedback |
|
Use Scenario: Measuring PV array string current in MPPT controllers operating up to 76V open-circuit voltage. IC Role / Device Role / Timing Role: Fixed-gain current amplifier driving microcontroller's 12-bit SAR ADC with minimal external components. Use Value: ±80µV offset enables accurate low-light current measurement down to 0.1A using 50mΩ shunt-no calibration required. |
Use Scenario: Closed-loop current feedback in 3-phase IGBT inverters for HVAC compressors and pumps. IC Role / Device Role / Timing Role: High-bandwidth analog front-end providing real-time phase current to PWM controller for torque regulation. Use Value: 270kHz bandwidth supports 20kHz PWM carrier frequencies with <1µs group delay-reducing current loop instability risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Same 20V/V gain, but higher ±200µV offset and 100µA quiescent current; no internal LDO. | Lacks integrated regulation-requires clean 5V bias rail separate from monitored voltage. | Select only if legacy MAX4080 footprint reuse is mandatory and offset budget allows ±0.2% added error. |
| INA240A1D | 20V/V gain, ±20µV offset, but narrower 0–80V common-mode range and 4V minimum VCM. | Cannot operate below 4V common-mode-unsuitable for battery discharge monitoring near 0V. | Prefer for new designs needing lower offset, but verify VCM stays ≥4V during full system operation. |
Compared with MAX4080TASA+, LMP8480MMX-T/NOPB offers tighter offset and integrated LDO for single-rail simplicity; compared with INA240A1D, it supports true 0V-to-76V operation but trades 20µV offset for broader VCM flexibility.
Availability
LMP8480MMX-T/NOPB is available at Aetrix Electronics and suitable for automotive battery management, telecom power supervision, and solar charge controller applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for LMP8480MMX-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 LMP8480MMX-T/NOPB belongs to TI's LMP848x family of high-voltage current sense amplifiers, engineered specifically for unidirectional/bidirectional shunt-based current measurement in harsh automotive, industrial, and telecom environments.
FAQ
What is the maximum common-mode voltage the LMP8480MMX-T/NOPB can measure?
The LMP8480MMX-T/NOPB supports a common-mode input voltage range of 4.0V to 76V. This means it can accurately sense current across shunts placed on power rails up to 76V-such as 48V telecom systems or 60V EV auxiliary batteries-while rejecting noise common to both RSP and RSN inputs with 124dB CMRR.
Can the LMP8480MMX-T/NOPB be powered from the same rail it monitors?
Yes-the LMP8480MMX-T/NOPB accepts supply voltages from 4.5V to 76V, fully overlapping its 4.0V–76V common-mode range. This allows direct connection of VCC to the monitored bus (e.g., 48V telecom rail), eliminating the need for auxiliary bias supplies and reducing bill-of-materials count.
Does the LMP8480MMX-T/NOPB require external reference components?
No-the LMP8480MMX-T/NOPB internally grounds both VREF pins, fixing the output zero point at GND for unidirectional operation. Unlike the LMP8481, it needs no external resistors, references, or capacitors on REFA/REFB pins, simplifying layout and improving reliability in space-constrained designs.
What is the typical quiescent current of the LMP8480MMX-T/NOPB?
The LMP8480MMX-T/NOPB draws less than 100µA of quiescent current under normal operation. At 25°C and VCC = 48V, typical ICC is 88µA-making it suitable for always-on battery monitoring circuits where standby power budget is critical, such as automotive telematics or remote solar telemetry nodes.
How does the LMP8480MMX-T/NOPB handle overvoltage or saturation conditions?
The LMP8480MMX-T/NOPB features robust absolute maximum ratings: VCC and input pins tolerate up to 85V, and output settles within 50µs after saturation recovery. Its output remains stable with up to 500pF capacitive load and delivers >5mA sink/source current-enabling direct interface to ADCs or comparators without buffering.
LMP8480MMX-T/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 270 kHz
- Current - Input Bias:
- 6.3 µA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 88µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 76 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LMP8480MMX-T/NOPB FAQ
1.How can I place an order for LMP8480MMX-T/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8480MMX-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 LMP8480MMX-T/NOPB reliable?
The price and inventory of LMP8480MMX-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 LMP8480MMX-T/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8480MMX-T/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8480MMX-T/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8480MMX-T/NOPB?
LMP8480MMX-T/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8480MMX-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 LMP8480MMX-T/NOPB?
For technical support, including LMP8480MMX-T/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8480MMX-T/NOPB requirements.
6.How does Aetrix verify that LMP8480MMX-T/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8480MMX-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 LMP8480MMX-T/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8480MMX-T/NOPB?
All LMP8480MMX-T/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8480MMX-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 LMP8480MMX-T/NOPB part is unused and in its original packaging.
Return procedure for LMP8480MMX-T/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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