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Texas Instruments LMP8603QMME/NOPB
- Part No.:
- LMP8603QMME/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMP8603QMME/NOPB.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:660
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Product details
Overview
LMP8603QMME/NOPB from Texas Instruments is a fixed-gain, bidirectional current-sense amplifier with 100× total 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 LMP8603QMME/NOPB datasheet, LMP8603QMME/NOPB pinout, LMP8603QMME/NOPB application, or LMP8603QMME/NOPB equivalent, key selection criteria include unidirectional/bidirectional shunt monitoring accuracy, wide common-mode tolerance in DC/DC converters and motor drives, and precision output swing compatibility with 12-bit ADCs without external level-shifting.
Technical Context
The LMP8603QMME/NOPB implements a two-stage architecture: a chopper-stabilized preamplifier (gain = 10×, ±1mV VOS, ±10μV/°C TCVOS) followed by a buffered output stage (gain = 10×), enabling precise amplification of millivolt-level shunt voltages under extreme common-mode conditions. Its proprietary level-shift input stage uses internal resistors to withstand fault-induced differential overvoltage while maintaining integrity.
Signal path flexibility is provided through dedicated A1 (preamplifier output) and A2 (buffer input) terminals, allowing external RC filtering or gain adjustment between stages-critical for EMI suppression in industrial motor control and server power rails where noise immunity directly impacts measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Gain | 100× (±0.5% error) - delivers full-scale output for ±25mV input at 5V supply, matching typical 12-bit ADC reference ranges. |
| Common-Mode Range | –22V to +60V at 5V supply - enables direct sensing across high-side MOSFETs or negative-rail loads without level-shifting circuitry. |
| CMRR | ≥90dB (min) at 1kHz - rejects interference from switching node transients in buck converters and half-bridge inverters. |
| Input Offset Voltage | ±1mV (max) - ensures ≤±0.25% full-scale error when measuring 25mV shunt drops, critical for low-current precision. |
| Bandwidth | 60kHz - supports accurate current capture up to 10kHz fundamental frequencies with <1% gain error. |
| Supply Current | 1.1mA (typ) at 5V - enables low-power operation in always-on telemetry circuits without thermal derating. |
| Input Bias Current | ±2pA (typ) - minimizes voltage error across high-value shunts (>10mΩ), preserving accuracy in low-current applications. |
Pinout & Package
The LMP8603QMME/NOPB is housed in an 8-pin VSSOP (DGK) package measuring 3.00mm × 4.90mm, optimized for space-constrained PCB layouts in server VRMs and compact motor drivers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Negative input | Connects to low-side of current-sense shunt; accepts common-mode down to –22V. |
| 2: +IN | Positive input | Connects to high-side of shunt; forms differential pair with –IN for bidirectional sensing. |
| 3: VS | Positive supply | Single 3.3V or 5V rail; powers both preamp and buffer stages. |
| 4: OUT | Single-ended output | 100× amplified, rail-to-rail capable output (0–4.98V at 5V supply) for ADC interfacing. |
| 5: –IN (GND) | Power ground | Analog ground reference; must be star-connected to minimize noise coupling. |
| 6: OFFSET | DC offset control | Biasing point for bidirectional operation; tied to VS/2 for zero-current mid-scale output. |
| 7: A1 | Preamplifier output | 10× gain node; connects to external RC filter or gain-adjust network before A2 input. |
| 8: A2 | Buffer input | Receives filtered/adjusted signal from A1; feeds final 10× gain stage to OUT. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized input stage | Reduces 1/f noise and drift, enabling stable ±10μV/°C offset performance across –40°C to +125°C ambient. |
| In-line filter capability (A1/A2) | Allows placement of external RC networks between preamp and buffer to suppress >100kHz switching noise without degrading bandwidth. |
| Level-shift input resistors | Withstand ±82V differential input during fault events, preventing latch-up or permanent damage in industrial overvoltage scenarios. |
| Bidirectional single-supply operation | OFFSET pin enables true zero-centered output (e.g., 2.5V = 0A) using only one 5V rail-eliminates dual supplies in battery-powered instrumentation. |
| High CMRR at high frequency | Maintains ≥83dB CMRR up to 10kHz, ensuring accurate current measurement amid fast dv/dt transients in SiC/GaN-based converters. |
Applications
| Server VRM Current Monitoring | Industrial Linear Motor Drive |
|---|---|
Use Scenario: Real-time phase current feedback in Intel server voltage regulator modules with 48V input and sub-1V CPU core rails. IC Role / Device Role / Timing Role: High-side shunt amplifier delivering 100× gain to 12-bit ADC for closed-loop current limiting and thermal derating. Use Value: –22V to +60V common-mode range allows direct connection to high-side FET source without isolation, reducing BOM count and layout area. | Use Scenario: Bidirectional current sensing in servo-driven linear motor power stages with regenerative braking. IC Role / Device Role / Timing Role: Differential amplifier with OFFSET pin biasing to generate ±2.5V output centered at zero current for analog-to-digital conversion. Use Value: ±10μV/°C TCVOS ensures <±0.1% full-scale drift over motor temperature rise (–40°C to +105°C), improving position control accuracy. |
| Field Transmitter Loop Power | Off-Highway Vehicle Battery Management |
Use Scenario: 4–20mA field transmitter powered from loop supply with integrated current sensing for self-diagnostic reporting. IC Role / Device Role / Timing Role: Low-quiescent-current (1.1mA) current monitor feeding microcontroller ADC to verify sensor health and detect open-circuit faults. Use Value: 3.3V operation mode (–4V to +27V common-mode) supports legacy 24V loop supplies while maintaining ±1mV offset accuracy. | Use Scenario: Cell-level current monitoring in 24V/48V battery packs for construction equipment with harsh EMI environments. IC Role / Device Role / Timing Role: Shunt amplifier with A1/A2 filter nodes suppressing PWM noise from adjacent DC/DC converters and motor controllers. Use Value: 60kHz bandwidth captures transient overcurrent events within 16.7μs, enabling fast fuseless protection response. |
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, 80V common-mode, but fixed 20× gain; no A1/A2 filter access. | Better for high-speed motor control; unsuitable for low-bandwidth precision applications requiring external filtering. | Select when bandwidth >100kHz is required and gain flexibility is secondary. |
| MAX40056ATA+T | 100× gain, 65V common-mode, but only 30kHz bandwidth and no OFFSET pin for bidirectional operation. | Optimized for unidirectional high-voltage sensing; lacks zero-centered output capability for regenerative systems. | Choose for cost-sensitive unidirectional applications where bidirectional support is unnecessary. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LMP8603QMME/NOPB uniquely combines 100× gain, bidirectional OFFSET control, and accessible A1/A2 nodes-enabling both precision DC accuracy and application-specific noise filtering in a single device.
Availability
LMP8603QMME/NOPB is available at Aetrix Electronics and suitable for server VRM current monitoring, industrial linear motor drives, field transmitter loop power, and off-highway vehicle battery management requiring stable component supply and automotive-grade reliability.
Supply support for LMP8603QMME/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 chain solutions.
The LMP860x product line was designed specifically for high-accuracy, high-common-mode current sensing in power conversion, motor control, and industrial automation-prioritizing low drift, robust fault tolerance, and flexible signal conditioning.
FAQ
What is the maximum common-mode voltage supported by the LMP8603QMME/NOPB?
The LMP8603QMME/NOPB supports a maximum input common-mode voltage of +60V and a minimum of –22V when operating from a 5V supply. This specification is validated per TI's SLVSJ15 datasheet Section 5.6, enabling direct high-side sensing in 48V systems and negative-rail monitoring in industrial motor drives without external level-shifting circuitry.
How does the A1 and A2 pin functionality enable signal filtering in the LMP8603QMME/NOPB?
The A1 pin provides the 10× preamplifier output, and the A2 pin serves as the input to the 10× output buffer stage. Placing an RC network between A1 and A2 allows designers to implement custom low-pass filtering before final gain-critical for rejecting high-frequency switching noise in DC/DC converters while preserving DC accuracy. This capability is explicitly documented in the LMP8603QMME/NOPB functional block diagram and Section 6.1.1 of the datasheet.
Can the LMP8603QMME/NOPB be used for bidirectional current sensing with a single 5V supply?
Yes, the LMP8603QMME/NOPB supports true bidirectional current sensing using only a single 5V supply. The OFFSET pin is biased to 2.5V (VS/2), shifting the output to mid-scale (2.5V) at zero current. Positive and negative shunt voltages then produce corresponding increases or decreases in output voltage-enabling full-range measurement of charging and discharging currents in battery systems, as confirmed in Section 6.3.1 and Figure 7-2 of the LMP8603QMME/NOPB datasheet.
What is the typical supply current consumption of the LMP8603QMME/NOPB at 5V operation?
The LMP8603QMME/NOPB draws 1.1mA typical supply current at 5V operation, 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 designs in always-on telemetry and battery-backed monitoring systems without compromising bandwidth or accuracy.
Does the LMP8603QMME/NOPB require external components for basic operation?
No external components are required for basic unidirectional operation: only VS, GND, +IN, –IN, OFFSET (tied to VS/2), and OUT connections are needed. However, for bidirectional sensing, a precision resistor divider is required to generate the VS/2 bias on the OFFSET pin, and for noise filtering, passive components may be added between A1 and A2-both configurations are validated in TI's official application schematics and Section 7.1 of the LMP8603QMME/NOPB datasheet.
LMP8603QMME/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
LMP8603QMME/NOPB FAQ
1.How can I place an order for LMP8603QMME/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8603QMME/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 LMP8603QMME/NOPB reliable?
The price and inventory of LMP8603QMME/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP8603QMME/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8603QMME/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8603QMME/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8603QMME/NOPB?
LMP8603QMME/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8603QMME/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 LMP8603QMME/NOPB?
For technical support, including LMP8603QMME/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8603QMME/NOPB requirements.
6.How does Aetrix verify that LMP8603QMME/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8603QMME/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 LMP8603QMME/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8603QMME/NOPB?
All LMP8603QMME/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8603QMME/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 LMP8603QMME/NOPB part is unused and in its original packaging.
Return procedure for LMP8603QMME/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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