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Texas Instruments LMP8603QMMX/NOPB
- Part No.:
- LMP8603QMMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMP8603QMMX/NOPB.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
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Product details
Overview
LMP8603QMMX/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 for signal conditioning in high-noise industrial power stages.
For engineers reviewing the LMP8603QMMX/NOPB datasheet, LMP8603QMMX/NOPB pinout, LMP8603QMMX/NOPB application, or LMP8603QMMX/NOPB equivalent, this device supports accurate shunt-based current monitoring in DC/DC converters, server power supplies, and motor control where wide common-mode range and low drift are critical.
Technical Context
The LMP8603QMMX/NOPB implements a two-stage architecture: a chopping-level-shift preamplifier (gain = 10×, trimmed 100kΩ output impedance) followed by a buffered output stage (gain = 10×), enabling precise amplification of µV-level shunt voltages under high common-mode stress. Its proprietary input stage withstands large differential fault voltages without damage.
It supports single-supply bidirectional operation via the OFFSET pin, allowing full-scale ADC interfacing across both current polarities. The A1/A2 pins expose the inter-stage node for external filtering or gain modification-enabling custom bandwidth shaping or noise rejection without altering core accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Gain | 100× (±0.5% error) - delivers full-scale output for 25mV shunt drop at 5V supply |
| Common-Mode Range | –22V to +60V at VS = 5V - enables direct sensing on high-side MOSFET drains or negative-rail loads |
| CMRR | ≥90dB (min) at 1kHz - rejects bus ripple and switching noise in noisy 48V systems |
| Input Offset Voltage | ±1mV (max) - ensures ≤25µA error at 25mΩ shunt, critical for low-current precision |
| TCVOS | ±10µV/°C (max) - limits drift to <1.25mV over –40°C to +125°C ambient |
| Bandwidth | 60kHz - supports real-time monitoring of fast-switching GaN-based DC/DC converters |
| Supply Current | 1.1mA (typ) at 5V - enables low-power always-on current supervision in battery-backed systems |
Pinout & Package
The LMP8603QMMX/NOPB is packaged in an 8-pin VSSOP (DGK) package measuring 3.00mm × 4.90mm, optimized for space-constrained PCB layouts in server and industrial power modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| -IN (Pin 1) | Negative input | Connects to low-side of current shunt; accepts common-mode down to –22V |
| +IN (Pin 8) | Positive input | Connects to high-side of shunt; forms differential pair with –IN |
| OFFSET (Pin 7) | DC offset control | Sets output mid-scale (VS/2) for bidirectional current measurement |
| OUT (Pin 5) | Single-ended output | Delivers amplified, filtered, rail-to-rail compatible voltage to ADC input |
| A1 (Pin 3) | Preamplifier output | Provides 10×-gained signal for external RC filtering or gain adjustment |
| A2 (Pin 4) | Buffer input | Accepts filtered A1 signal; input bias current ≤2pA minimizes loading error |
| VS (Pin 6) | Positive supply | Accepts 3.3V or 5V single supply; PSRR ≥90dB suppresses supply noise |
| GND (Pin 2) | Power ground | Reference for all analog circuitry; separate from power ground for noise isolation |
Key Features
| Feature | Design Value |
|---|---|
| Chopping-level-shift input stage | Enables ultra-low offset (±1mV) and drift (±10µV/°C) while surviving >80V differential fault transients |
| In-line filter capability (A1/A2 pins) | Allows insertion of external RC network between preamp and buffer to suppress PWM switching noise without degrading DC accuracy |
| Bidirectional single-supply operation | OFFSET pin shifts output baseline to VS/2, enabling true zero-crossing current detection using only one supply rail |
| High common-mode input range | –22V to +60V at 5V supply permits direct high-side sensing in 48V telecom and server VRMs |
| Trimmed 100kΩ A1 output impedance | Ensures predictable RC time constant when adding external filter; ±1% tolerance over temperature |
Applications
| Server VRM Current Monitoring | Industrial DC/DC Converter Feedback |
|---|---|
Use Scenario: Real-time phase current measurement in Intel server voltage regulator modules with 48V input and sub-1V CPU core rails. IC Role / Device Role / Timing Role: High-side current-sense amplifier interfaced to 12-bit ADC for digital power management unit (PMBus) reporting. Use Value: 100× gain and 60kHz bandwidth capture transient load steps; ±10µV/°C TCVOS ensures calibration stability across chassis thermal gradients. | Use Scenario: Output current sensing in isolated 24V-to-5V industrial DC/DC converters powering PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional shunt monitor feeding isolated sigma-delta ADC for overcurrent protection and efficiency optimization. Use Value: –22V to +60V common-mode range allows direct placement on primary-side high-side switch; OFFSET pin enables zero-current detection during standby. |
| Linear Motor Power Stage | Field Transmitter Signal Conditioning |
Use Scenario: Precision current feedback in servo-driven linear motors used in semiconductor wafer handling equipment. IC Role / Device Role / Timing Role: Low-drift shunt amplifier driving FPGA-based current loop controller with 100kHz update rate. Use Value: 90dB CMRR rejects EMI from adjacent PWM gate drivers; 60kHz bandwidth supports closed-loop bandwidth up to 10kHz. | Use Scenario: 4–20mA transmitter front-end where shunt voltage must be measured with galvanic isolation and high EMC immunity. IC Role / Device Role / Timing Role: Isolated current sense interface with internal level-shifting, eliminating need for external op-amp bias networks. Use Value: Chopping architecture eliminates 1/f noise; ±1mV offset enables <0.1% FSR error in 250Ω loop shunt applications. |
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 | Gain = 20× (fixed), wider common-mode (–4V to 80V), higher bandwidth (400kHz), no A1/A2 filter nodes | Better for high-speed motor control but lacks in-line filtering; requires external gain stage for 100× scaling | Select when bandwidth >100kHz is required and external filtering is acceptable |
| MAX40056ASA+T | Gain = 100× (fixed), common-mode = –0.2V to 65V, CMRR = 120dB (min), no exposed preamp node | Superior CMRR for ultra-low-noise lab instrumentation; no A1/A2 flexibility limits custom filtering | Select when maximum noise rejection is critical and standard RC filtering suffices |
Compared with INA240A1QDRQ1 and MAX40056ASA+T, the LMP8603QMMX/NOPB uniquely provides accessible A1/A2 nodes for configurable signal conditioning while maintaining 100× gain and –22V to +60V operation-making it optimal for industrial power systems requiring both precision and design adaptability.
Availability
LMP8603QMMX/NOPB is available at Aetrix Electronics and suitable for server VRMs, industrial DC/DC converters, linear motor drives, and field transmitter designs requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for LMP8603QMMX/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 for industrial, automotive, and communications markets.
The LMP860x family was designed specifically for high-accuracy, high-common-mode current sensing in power conversion and motor control-emphasizing robustness, low drift, and flexible signal conditioning.
FAQ
What is the maximum common-mode voltage supported by the LMP8603QMMX/NOPB?
The LMP8603QMMX/NOPB supports a maximum input common-mode voltage range of –22V to +60V when operated from a 5V supply, enabling direct high-side sensing in 48V systems and negative-rail applications without level-shifting circuitry. This specification is validated across the full –40°C to +125°C operating temperature range per TI SLVSJ15 datasheet Section 5.6.
How does the A1 and A2 pin functionality enable custom filtering in the LMP8603QMMX/NOPB?
The A1 pin outputs the 10×-gained preamplifier signal, and the A2 pin feeds that signal into the 10× output buffer. By inserting an RC network between A1 and A2, designers can add a programmable low-pass filter to suppress PWM switching noise while preserving DC accuracy. The trimmed 100kΩ A1 output impedance ensures predictable cutoff frequency, as confirmed in Section 6.1.1 and Figure 4-2 of the LMP8603QMMX/NOPB datasheet.
Can the LMP8603QMMX/NOPB perform bidirectional current sensing with a single 5V supply?
Yes-the LMP8603QMMX/NOPB supports true bidirectional current sensing using only a single 5V supply. The OFFSET pin is biased to VS/2 (2.5V), shifting the output baseline so positive current produces voltage above 2.5V and negative current produces voltage below 2.5V. This capability is explicitly documented in Section 3 (Description) and Section 6.3.1 of the LMP8603QMMX/NOPB datasheet.
What is the typical supply current consumption of the LMP8603QMMX/NOPB at 5V operation?
The LMP8603QMMX/NOPB draws 1.1mA typical supply current at VS = 5V and TA = 25°C, with a guaranteed maximum of 1.5mA over the full –40°C to +125°C temperature range (Section 5.6, Electrical Characteristics). This low quiescent current supports energy-efficient always-on monitoring in thermally constrained server and industrial environments.
Does the LMP8603QMMX/NOPB include built-in protection against differential overvoltage faults?
Yes-the LMP8603QMMX/NOPB incorporates level-shift resistors at its inputs that allow it to safely withstand differential input voltages exceeding ±80V during fault conditions, unlike many competitive current-sense amplifiers. This ruggedness is enabled by its proprietary chopping-level-shift architecture and is highlighted in Section 6.1 and Absolute Maximum Ratings (Section 5.1) of the official datasheet.
LMP8603QMMX/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
LMP8603QMMX/NOPB FAQ
1.How can I place an order for LMP8603QMMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8603QMMX/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 LMP8603QMMX/NOPB reliable?
The price and inventory of LMP8603QMMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP8603QMMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8603QMMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8603QMMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8603QMMX/NOPB?
LMP8603QMMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8603QMMX/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 LMP8603QMMX/NOPB?
For technical support, including LMP8603QMMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8603QMMX/NOPB requirements.
6.How does Aetrix verify that LMP8603QMMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8603QMMX/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 LMP8603QMMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8603QMMX/NOPB?
All LMP8603QMMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8603QMMX/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 LMP8603QMMX/NOPB part is unused and in its original packaging.
Return procedure for LMP8603QMMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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