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Texas Instruments LMP8603MM/NOPB
- Part No.:
- LMP8603MM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMP8603MM/NOPB.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,802
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Product details
Overview
LMP8603MM/NOPB from Texas Instruments is a precision bidirectional current-sense amplifier with fixed 100× gain, operating from a single 5V supply across –22V to +60V input common-mode voltage range. It features ±1mV max input offset voltage, ±10μV/°C TCVOS, 90dB min CMRR, and in-line filter capability via A1/A2 pins for signal conditioning in high-noise power systems.
For engineers reviewing the LMP8603MM/NOPB datasheet, LMP8603MM/NOPB pinout, LMP8603MM/NOPB application, or LMP8603MM/NOPB equivalent, this device is selected for high-accuracy shunt-based current monitoring where wide common-mode range, low drift, and configurable filtering are required - especially in DC/DC converters, server power supplies, and motor control stages.
Technical Context
The LMP8603MM/NOPB implements a two-stage architecture: a chopper-stabilized preamplifier (gain = 10×, trimmed 100kΩ output impedance) followed by a buffer stage (gain = 10×), yielding total gain of 100×. Its level-shift input stage enables operation at –22V to +60V VCM while protecting against large differential fault voltages.
Signal conditioning is enabled via accessible A1 (preamplifier output) and A2 (buffer input) terminals, allowing external RC filters or gain adjustment without modifying core amplification. The OFFSET pin supports bidirectional sensing by shifting output reference to mid-supply or user-defined bias points.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Gain | 100× (±0.5% error) - drives 12-bit+ ADCs to full scale with ±25mV input sense range |
| Input Offset Voltage | ±1 mV max (–40°C to +125°C) - enables <1% error at 100mV shunt drop |
| TCVOS | ±10 μV/°C max - ensures <±0.3mV drift over 85°C ambient range |
| CMRR | 90 dB min (–20V to +60V, f = 1kHz) - rejects noise from high-side switching nodes |
| Bandwidth | 60 kHz - supports fast transient response in 100kHz-class DC/DC converters |
| Supply Current | 1.1 mA typ at 5V - suitable for always-on monitoring in energy-sensitive systems |
| Common-Mode Range | –22V to +60V at VS = 5V - enables direct high-side sensing in 48V telecom and server rails |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 4.90 mm, 0.65 mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Differential input (inverting) | Connects to low side of shunt resistor; accepts up to ±82V differential input |
| 2: GND | Power ground reference | System ground return for supply and output; decoupling capacitor must be placed adjacent |
| 3: +IN | Differential input (non-inverting) | Connects to high side of shunt; forms Kelvin sense pair with –IN for accuracy |
| 4: A2 | Buffer stage input | Accepts filtered or attenuated signal from A1; enables external gain tuning or anti-aliasing |
| 5: OUT | Single-ended output | 100× amplified, rail-to-rail capable (0.01V to 4.99V at 5V supply); drives 100kΩ load |
| 6: VS | Positive supply | 5V nominal (3V–5.5V range); powers both preamp and buffer stages |
| 7: OFFSET | Bidirectional level-shift control | Set to VS/2 for symmetric ±current sensing; set to GND for unidirectional 0–Imax |
| 8: A1 | Preamplifier output | 10× amplified signal with 100kΩ output impedance; connects to A2 via external RC network |
Key Features
| Feature | Design Value |
|---|---|
| In-line filter capability | A1 and A2 pins expose internal gain node, enabling user-configurable RC low-pass filtering before final amplification |
| Chopper-stabilized input stage | Reduces 1/f noise and achieves ±10μV/°C TCVOS for stable performance across industrial temperature range |
| Level-shift protection resistors | Input resistors withstand >80V differential faults without latch-up or damage-critical in motor drive short-circuit events |
| Bidirectional sensing support | OFFSET pin allows DC biasing of output to enable accurate zero-centered current measurement (e.g., H-bridge phase current) |
| High CMRR at extended VCM | 90 dB minimum rejection from –20V to +60V common-mode range ensures accuracy in noisy high-side configurations |
Applications
| Server Power Monitoring | Industrial DC/DC Converter |
|---|---|
|
Use Scenario: Real-time current monitoring of 48V input rails and 12V/5V VRM outputs in Intel-compatible servers. IC Role / Device Role / Timing Role: High-side current-sense amplifier measuring shunt voltage with –22V to +60V common-mode tolerance. Use Value: Enables precise power budgeting and fault detection without isolation components, leveraging 100× gain and 90dB CMRR to reject switch-node noise. |
Use Scenario: Output current sensing in isolated flyback or forward converters used in PLC power modules. IC Role / Device Role / Timing Role: Bidirectional shunt amplifier interfacing with microcontroller ADC for cycle-by-cycle current limiting. Use Value: ±1mV offset and ±10μV/°C drift ensure <0.5% measurement error across –40°C to +85°C operating range. |
| Linear Motor Drive Stage | Field Transmitter Loop |
|
Use Scenario: Phase current feedback in servo drives controlling linear motors for semiconductor equipment. IC Role / Device Role / Timing Role: High-bandwidth (60 kHz) current monitor on H-bridge outputs for torque regulation. Use Value: A1/A2 filter interface allows 10kHz cutoff anti-aliasing to match PWM frequency while preserving transient fidelity. |
Use Scenario: 4–20mA loop transmitter requiring precise load current sensing for diagnostics and calibration. IC Role / Device Role / Timing Role: Low-drift bidirectional amplifier measuring shunt voltage across sense resistor in two-wire loop. Use Value: OFFSET pin configured for unidirectional mode delivers 0–5V output proportional to 4–20mA, with <0.1% linearity error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | 20× fixed gain, –4V to 80V VCM, 120dB CMRR, integrated EMI filter | Higher CMRR but lower gain; requires external gain stage for same ADC utilization as LMP8603MM/NOPB | Preferred when ultra-high noise immunity is critical and system can accommodate additional amplification |
| MAX40056ATA+T | 100× gain, –0.2V to 65V VCM, 105dB CMRR, rail-to-rail output, no A1/A2 filter access | Matches gain and VCM range but lacks in-line filter capability; no internal node access for custom filtering | Selected when board space is constrained and standard 60kHz bandwidth suffices without user-adjustable filtering |
Compared with INA240A1IDR and MAX40056ATA+T, the LMP8603MM/NOPB uniquely provides accessible A1/A2 nodes for configurable signal conditioning while maintaining 100× gain and –22V to +60V operation - making it optimal for designs requiring tailored bandwidth or offset rejection beyond fixed-filter ICs.
Availability
LMP8603MM/NOPB is available at Aetrix Electronics and suitable for server power monitoring, industrial DC/DC converters, and linear motor drive stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMP8603MM/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 solutions.
The LMP8603MM/NOPB belongs to TI's LMP precision current-sense amplifier family, designed specifically for high-accuracy, high-common-mode shunt-based current measurement in industrial, computing, and motor control systems.
FAQ
What is the maximum common-mode voltage range supported by the LMP8603MM/NOPB?
The LMP8603MM/NOPB supports a common-mode input voltage range of –22V to +60V when operated from a 5V supply. This specification is validated across the full industrial temperature range (–40°C to +125°C) and enables direct high-side sensing in 48V systems without level-shifting circuitry. Operation at 3.3V supply reduces the range to –4V to +27V.
How does the A1 and A2 pin interface function in the LMP8603MM/NOPB?
The A1 pin outputs the 10× preamplified signal through a trimmed 100kΩ resistor; the A2 pin feeds that signal into the 10× output buffer. This split-gain architecture allows insertion of external RC networks between A1 and A2 to implement custom low-pass filtering or gain adjustment - a capability not found in monolithic fixed-gain amplifiers like the LMP8603MM/NOPB's alternatives.
Can the LMP8603MM/NOPB be used for bidirectional current sensing, and how is it configured?
Yes, the LMP8603MM/NOPB supports bidirectional current sensing via its dedicated OFFSET pin. When OFFSET is biased to VS/2 (e.g., 2.5V at 5V supply), the output centers at mid-supply, producing positive voltage for current in one direction and negative voltage for reverse flow. This configuration is essential for H-bridge motor phase current monitoring and regenerative braking detection.
What is the typical input offset voltage drift (TCVOS) specification for the LMP8603MM/NOPB?
The LMP8603MM/NOPB has a maximum input offset voltage drift of ±10μV/°C across –40°C to +125°C. This low drift, combined with ±1mV max initial offset, ensures minimal measurement error accumulation over temperature - critical for applications such as field transmitters and server power telemetry where calibration stability is mandatory.
Does the LMP8603MM/NOPB require external compensation or stability components?
No external compensation is required for basic operation. The LMP8603MM/NOPB is unity-gain stable and specified for capacitive loads up to 100pF. However, when using the A1/A2 interface for filtering, designers must verify phase margin if adding reactive elements - TI's datasheet Figure 5-10 and Figure 5-11 provide gain/phase vs. frequency data for stability analysis at 3.3V and 5V supplies.
LMP8603MM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®
- 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:
- 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-VSSOP
LMP8603MM/NOPB FAQ
1.How can I place an order for LMP8603MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8603MM/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 LMP8603MM/NOPB reliable?
The price and inventory of LMP8603MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP8603MM/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8603MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8603MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8603MM/NOPB?
LMP8603MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8603MM/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 LMP8603MM/NOPB?
For technical support, including LMP8603MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8603MM/NOPB requirements.
6.How does Aetrix verify that LMP8603MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8603MM/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 LMP8603MM/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8603MM/NOPB?
All LMP8603MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8603MM/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 LMP8603MM/NOPB part is unused and in its original packaging.
Return procedure for LMP8603MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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