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Texas Instruments LMP8603QMAX/NOPB
- Part No.:
- LMP8603QMAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP8603QMAX/NOPB.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,005
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Product details
Overview
LMP8603QMAX/NOPB from Texas Instruments is a precision bidirectional current-sense amplifier with fixed 100× gain, –22V to +60V input common-mode voltage range at 5V supply, 90dB minimum CMRR, ±1mV max input offset voltage, and in-line filter capability via A1/A2 pins for signal conditioning in high-noise power systems.
For engineers reviewing the LMP8603QMAX/NOPB datasheet, LMP8603QMAX/NOPB pinout, LMP8603QMAX/NOPB application, or LMP8603QMAX/NOPB equivalent, key selection criteria include its rail-to-rail output swing, ±10μV/°C TCVOS, 60kHz bandwidth, single-supply operation, and dual-stage gain architecture enabling external filtering or gain adjustment between preamplifier (A1) and buffer (A2) stages.
Technical Context
The LMP8603QMAX/NOPB implements a two-stage signal path: a chopping-based level-shift preamplifier with precise 10× gain and trimmed 100kΩ output impedance resistor (RF-INT), followed by a buffered output stage with 10× gain - yielding total 100× fixed gain. The A1 and A2 pins expose the inter-stage node to support external RC filtering or gain modification without affecting input stage performance.
Its proprietary input stage uses level-shift resistors to withstand large differential fault voltages while maintaining low offset (±1mV), low drift (±10μV/°C), and high CMRR (≥90dB at 5V supply, –20V to +60V VCM), making it suitable for accurate shunt-based current monitoring in industrial and server power rails where ground-referenced sensing is impractical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Gain | 100× (99.5–100.5 V/V) - drives 12-bit+ ADCs to full scale with ±0.5% gain error |
| Common-Mode Range | –22V to +60V at 5V supply - enables direct sensing on negative rails or high-side 48V/60V bus |
| CMRR | ≥90dB (min) - rejects noise from switching regulators and motor drives |
| Input Offset Voltage | ±1mV (max) - supports <10mΩ shunt resolution at 1A full-scale |
| TCVOS | ±10μV/°C (max) - ensures stable accuracy across –40°C to +125°C ambient |
| Bandwidth | 60kHz - captures fast transients in DC/DC converters and motor control loops |
| Supply Current | 0.45–1.5mA - low quiescent power for always-on monitoring in energy-sensitive systems |
Pinout & Package
The LMP8603QMAX/NOPB is housed in an 8-pin SOIC (D package), 4.90mm × 6.00mm body size, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Negative input | Differential input terminal for shunt resistor low-side connection; accepts –22V to +60V common-mode |
| 2: +IN | Positive input | Differential input terminal for shunt resistor high-side connection; matched to –IN for CMRR |
| 3: VS | Positive supply | Single 3.3V or 5V rail; powers both preamp and buffer stages |
| 4: OUT | Output | Single-ended, rail-to-rail output (0–5V at 5V supply); drives ADC or comparator directly |
| 5: –GND | Power ground | Analog ground reference; separate from system power ground to minimize noise coupling |
| 6: OFFSET | DC offset control | Adjusts output mid-scale (e.g., 2.5V at 5V supply) to enable bidirectional current measurement |
| 7: A1 | Preamplifier output | 10×-gained intermediate node; connects to external RC filter or gain network before A2 |
| 8: A2 | Buffer input | Input to 10× output stage; receives filtered/modified signal from A1 for final amplification |
Key Features
| Feature | Design Value |
|---|---|
| In-line filter capability | A1 and A2 pins provide access to internal gain node for adding external RC filters without degrading input stage CMRR or offset |
| Chopping-based level-shift input | Enables ultra-low offset (±1mV) and drift (±10μV/°C) while surviving >80V differential fault conditions |
| Bidirectional single-supply operation | OFFSET pin sets output zero-current point (e.g., 2.5V @ 5V), enabling true ± current measurement from 0V supply |
| High common-mode rejection | ≥90dB CMRR over –20V to +60V VCM ensures accuracy in noisy 48V telecom or server VRM environments |
| Rail-to-rail output swing | Swings within 2mV of GND and 10mV of VS (at 5V), maximizing dynamic range for 12-bit ADC interfacing |
Applications
| Server VRM Current Monitoring | Industrial DC/DC Converter Feedback |
|---|---|
Use Scenario: Real-time phase current sensing in Intel server voltage regulator modules (VRMs) with 48V input and sub-1V CPU core outputs. IC Role / Device Role / Timing Role: High-side current-sense amplifier measuring shunt voltage across multiphase buck converter outputs under ±60V common-mode. Use Value: Enables precise load-line calibration and overcurrent protection with 100× gain and 60kHz bandwidth matching VRM switching frequencies. | Use Scenario: Output current monitoring in isolated industrial DC/DC converters used in PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Bidirectional shunt amplifier providing isolated feedback to controller ICs via optocoupler or digital isolator. Use Value: ±1mV offset and ±10μV/°C drift ensure stable regulation across –40°C to +85°C operating range without recalibration. |
| Linear Motor Power Stage | Field Transmitter & Sensor Loop |
Use Scenario: Closed-loop current control in linear servo actuators driving precision motion stages in semiconductor equipment. IC Role / Device Role / Timing Role: Low-latency current monitor feeding analog input of motion controller FPGA or DSP. Use Value: 60kHz bandwidth and 0.83V/µs slew rate capture rapid current changes during acceleration/deceleration without phase lag. | Use Scenario: 4–20mA loop-powered field transmitter measuring process current in hazardous-area pressure/temperature sensors. IC Role / Device Role / Timing Role: Bidirectional sense amplifier referenced to loop supply, enabling diagnostic reverse-current detection. Use Value: –22V to +60V common-mode range allows direct integration into 24V loop supplies with transient immunity up to ±40V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 500kHz bandwidth, 20V/V gain, integrated EMI filter, ±4V to +80V VCM | Better suited for high-frequency motor control; lacks A1/A2 filter node flexibility | Select when higher bandwidth and automotive AEC-Q100 qualification are required over programmable filtering |
| MAX40056ASA+ | 10MHz bandwidth, 100V/V gain, ±0.5mV offset, no A1/A2 access | Optimized for fast overcurrent protection; no provision for external signal conditioning | Select when nanosecond-level fault response is critical and external filtering is unnecessary |
Compared with INA240A1QDRQ1 and MAX40056ASA+, the LMP8603QMAX/NOPB uniquely provides accessible A1/A2 nodes for custom RC filtering, enabling tailored frequency response in noisy power-converter environments without sacrificing DC accuracy or thermal stability.
Availability
LMP8603QMAX/NOPB is available at Aetrix Electronics and suitable for server VRM monitoring, industrial DC/DC converter feedback, and linear motor power stage applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability (AEC-Q100 qualified).
Supply support for LMP8603QMAX/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 deep expertise in precision signal chain and power management technologies.
The LMP8603QMAX/NOPB belongs to TI's LMP precision current-sense amplifier family, designed specifically for high-accuracy, high-common-mode, bidirectional shunt-based current measurement in industrial, computing, and automotive power systems.
FAQ
What is the maximum common-mode voltage supported by the LMP8603QMAX/NOPB?
The LMP8603QMAX/NOPB supports a maximum input common-mode voltage of +60V and a minimum of –22V when operating from a 5V supply, enabling direct high-side or negative-rail current sensing in 48V systems and industrial power supplies without level-shifting circuitry.
How does the A1 and A2 pin interface enable signal conditioning in the LMP8603QMAX/NOPB?
The LMP8603QMAX/NOPB exposes the internal preamplifier output at A1 and the buffer input at A2, allowing engineers to insert external RC networks between them for low-pass filtering, notch filtering, or gain adjustment - preserving the high-CMRR input stage while tailoring frequency response for specific noise environments.
Is the LMP8603QMAX/NOPB suitable for bidirectional current measurement?
Yes, the LMP8603QMAX/NOPB supports true bidirectional current measurement via its dedicated OFFSET pin, which sets the output mid-scale voltage (e.g., 2.5V at 5V supply), enabling positive and negative shunt voltage detection - essential for regenerative braking, H-bridge motor control, and 4–20mA loop diagnostics.
What is the typical gain error and drift behavior of the LMP8603QMAX/NOPB over temperature?
The LMP8603QMAX/NOPB exhibits ±0.5% maximum gain error at room temperature and ±2.8 ppm/°C gain error drift over –40°C to +125°C, ensuring stable scaling across wide ambient ranges - critical for uncalibrated systems like field transmitters and server telemetry where factory calibration is impractical.
Does the LMP8603QMAX/NOPB require external components for basic operation?
No, the LMP8603QMAX/NOPB operates fully functional with only VS, GND, OFFSET (tied to mid-supply for bidirectional use), and load - though external decoupling capacitors (0.1μF ceramic near VS/GND) are recommended; A1/A2 filtering components are optional and only needed when custom frequency shaping is required.
LMP8603QMAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.83V/µs
- Gain Bandwidth Product:
- 60 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.04 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 48 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMP8603QMAX/NOPB FAQ
1.How can I place an order for LMP8603QMAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8603QMAX/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 LMP8603QMAX/NOPB reliable?
The price and inventory of LMP8603QMAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP8603QMAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8603QMAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8603QMAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8603QMAX/NOPB?
LMP8603QMAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8603QMAX/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 LMP8603QMAX/NOPB?
For technical support, including LMP8603QMAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8603QMAX/NOPB requirements.
6.How does Aetrix verify that LMP8603QMAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8603QMAX/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 LMP8603QMAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8603QMAX/NOPB?
All LMP8603QMAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8603QMAX/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 LMP8603QMAX/NOPB part is unused and in its original packaging.
Return procedure for LMP8603QMAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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