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Texas Instruments LMP8603MAX/NOPB
- Part No.:
- LMP8603MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP8603MAX/NOPB.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,655
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Product details
Overview
LMP8603MAX/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 industrial power systems.
For engineers reviewing the LMP8603MAX/NOPB datasheet, LMP8603MAX/NOPB pinout, LMP8603MAX/NOPB application, or LMP8603MAX/NOPB equivalent, key selection criteria include its rail-to-rail output swing, ±10μV/°C TCVOS, 60kHz bandwidth, single-supply bidirectional operation, and compatibility with shunt-based current monitoring in DC/DC converters and motor control stages.
Technical Context
The LMP8603MAX/NOPB implements a two-stage architecture: a chopping-stabilized preamplifier (gain = 10×, 100kΩ trimmed output impedance) followed by a buffered output stage (gain = 10×), enabling precise amplification of microvolt-level shunt voltages under high common-mode stress. Its level-shift input resistors protect against fault-induced differential overvoltage beyond ±82V.
Operation supports both unidirectional and bidirectional sensing via the OFFSET pin, which sets the output mid-scale reference; the A1 and A2 terminals allow external RC filtering or gain adjustment between stages without affecting total gain accuracy or thermal drift performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Gain | 100× (±0.5% error) - drives 12-bit ADCs to full scale with ≤250mV shunt voltage input at 5V supply |
| Common-Mode Range | –22V to +60V at VS = 5V - enables direct sensing on high-side MOSFET drains or negative-rail battery monitors |
| CMRR | ≥90dB (min) at 1kHz - rejects noise from switching regulators and motor commutation transients |
| Input Offset Voltage | ±1mV (max) - ensures ≤10mA error in 10mΩ shunt at 100× gain |
| TCVOS | ±10μV/°C (max) - limits offset drift to <±1.2mV over –40°C to +125°C operating range |
| Bandwidth | 60kHz - supports real-time current feedback in PWM-driven linear motor power stages up to 20kHz switching |
| Supply Current | 1.1mA (typ) at 5V - enables low-power operation in always-on server health monitoring circuits |
Pinout & Package
Package: DGK (VSSOP-8), 3.00mm × 4.90mm footprint, thermally enhanced for high-density PCB layouts in space-constrained power modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Negative input | Connects to low-side of current shunt; accepts common-mode down to –22V |
| 2: GND | Power ground | Analog ground reference for internal biasing and output stage return path |
| 3: +IN | Positive input | Connects to high-side of shunt; differential input handles ±82V fault tolerance |
| 4: A2 | Buffer input | Receives filtered/preconditioned signal from A1; enables external gain trim or RC filtering |
| 5: OUT | Single-ended output | Rail-to-rail output (0.01V to 4.99V at 5V supply) compatible with SAR ADC inputs |
| 6: VS | Positive supply | Accepts 3V to 5.5V single supply; PSRR ≥90dB suppresses supply ripple coupling |
| 7: OFFSET | DC offset control | Sets output zero-current point; connect to VS/2 for bidirectional sensing or GND for unidirectional |
| 8: A1 | Preamplifier output | Provides 10× amplified signal with 100kΩ source impedance for external filter network insertion |
Key Features
| Feature | Design Value |
|---|---|
| In-line filter capability | A1 and A2 pins expose internal preamp output, enabling user-defined RC filters to suppress EMI without degrading gain accuracy |
| Chopping-stabilized input stage | Reduces 1/f noise and thermal drift, achieving ±10μV/°C TCVOS and <17.5μVP-P 0.1–10Hz noise for stable DC current measurement |
| High common-mode fault tolerance | Input resistors enable survival under ±82V differential input - protects against inductive kickback in motor drive faults |
| Bidirectional sensing support | OFFSET pin allows flexible mid-scale referencing (e.g., VS/2) to resolve current direction in battery charge/discharge monitoring |
| Trimmed 100kΩ A1 output impedance | Enables predictable external filter design with <±50ppm/°C drift - eliminates need for calibration in production test |
Applications
| DC/DC Converter Monitoring | Linear Motor Power Stage |
|---|---|
Use Scenario: Real-time phase current sensing in synchronous buck converters delivering 12V/30A to FPGA power rails. IC Role / Device Role / Timing Role: High-side current monitor feeding analog input of TI C2000 MCU for cycle-by-cycle overcurrent protection. Use Value: 60kHz bandwidth and 90dB CMRR reject PWM switching noise, enabling accurate current limiting at 500kHz switching frequency. | Use Scenario: Bidirectional current feedback in servo-driven linear actuators used in semiconductor wafer handling. IC Role / Device Role / Timing Role: Shunt-based current sensor interfacing with isolated sigma-delta ADC for closed-loop position control. Use Value: ±22V to +60V common-mode range accommodates floating H-bridge outputs; OFFSET pin enables direction detection without polarity reversal. |
| Intel Server Power Management | Field Transmitter & Sensor |
Use Scenario: Per-rail current telemetry in dual-socket Xeon servers with 12V, 5V_STBY, and 3.3V VRMs. IC Role / Device Role / Timing Role: Precision current sense element feeding PMBus-compliant digital power controller (e.g., UCD90xxx). Use Value: ±1mV offset and ±10μV/°C drift ensure <±0.5% full-scale error across server ambient temperature range (0°C–70°C). | Use Scenario: 4–20mA loop-powered field transmitter measuring valve position via motor current signature analysis. IC Role / Device Role / Timing Role: Low-drift analog front-end converting shunt voltage to conditioned signal for microcontroller ADC sampling. Use Value: Single 3.3V supply operation and –4V to +27V common-mode range simplify interface with industrial 24V loop supplies and grounded sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1D | 50× gain, 80V common-mode range, integrated EMI filter, ±150nV/√Hz noise | Better noise performance but no A1/A2 filter access; fixed gain only | Select for ultra-low-noise 48V battery systems where external filtering is unnecessary |
| MAX40056ASA+ | 100× gain, –0.1V to 65V common-mode, 1.1MHz bandwidth, no A1/A2 pins | Higher speed but lacks in-line filter capability and has higher 25μV/°C TCVOS | Select when >100kHz current loop bandwidth is required and thermal drift is less critical |
Compared with INA240A1D and MAX40056ASA+, the LMP8603MAX/NOPB uniquely provides accessible A1/A2 nodes for custom signal conditioning while maintaining industry-leading TCVOS and fault robustness - essential for cost-sensitive, thermally demanding industrial power stages.
Availability
LMP8603MAX/NOPB is available at Aetrix Electronics and suitable for DC/DC converter monitoring, linear motor power stage feedback, and Intel server power management requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for LMP8603MAX/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 and power management ICs.
The LMP860x family was designed specifically for high-accuracy, high-common-mode current sensing in industrial motor drives, server VRMs, and battery management systems - prioritizing thermal stability, fault resilience, and design flexibility over raw speed.
FAQ
What is the maximum common-mode voltage supported by the LMP8603MAX/NOPB?
The LMP8603MAX/NOPB supports –22V to +60V input common-mode voltage when operated from a 5V supply, and –4V to +27V at 3.3V supply. This wide range enables direct high-side sensing in 48V automotive subsystems and negative-rail battery monitoring without level-shifting circuitry. The device maintains specified performance across this full range per TI SLVSJ15 datasheet Section 5.6.
Does the LMP8603MAX/NOPB require external components for basic operation?
No, the LMP8603MAX/NOPB operates fully functional with only VS, GND, +IN, –IN, OFFSET, and load on OUT. External components are optional: A1 and A2 pins allow insertion of RC filters for EMI suppression, and OFFSET may be tied to VS/2 (bidirectional) or GND (unidirectional) depending on application. No compensation capacitors or feedback resistors are needed for nominal 100× gain operation.
How does the LMP8603MAX/NOPB achieve its low offset drift?
The LMP8603MAX/NOPB achieves ±10μV/°C maximum TCVOS through a proprietary chopping-stabilized level-shift input stage that cancels 1/f noise and thermal gradients. This architecture, combined with laser-trimmed resistors in the preamplifier and buffer stages, ensures minimal drift across –40°C to +125°C - verified in TI's production testing per Section 5.5 and 5.6 of the SLVSJ15 datasheet.
Can the LMP8603MAX/NOPB be used for bidirectional current sensing?
Yes, the LMP8603MAX/NOPB supports bidirectional current sensing via its dedicated OFFSET pin. When OFFSET is biased to VS/2, the output centers at half-supply for zero current, allowing positive and negative shunt voltage swings to produce corresponding above/below-mid-scale outputs. This configuration is explicitly validated in TI's typical applications (Section 7.1) and enables battery charge/discharge monitoring without external op-amps.
What package type is used for the LMP8603MAX/NOPB?
The LMP8603MAX/NOPB uses the DGK package: an 8-pin VSSOP with 3.00mm × 4.90mm body size and 0.65mm lead pitch. This thermally enhanced surface-mount package supports higher power dissipation than SOIC variants and is optimized for compact, high-density PCB layouts in power electronics modules.
LMP8603MAX/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
LMP8603MAX/NOPB FAQ
1.How can I place an order for LMP8603MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8603MAX/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 LMP8603MAX/NOPB reliable?
The price and inventory of LMP8603MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP8603MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8603MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8603MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8603MAX/NOPB?
LMP8603MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8603MAX/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 LMP8603MAX/NOPB?
For technical support, including LMP8603MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8603MAX/NOPB requirements.
6.How does Aetrix verify that LMP8603MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8603MAX/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 LMP8603MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8603MAX/NOPB?
All LMP8603MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8603MAX/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 LMP8603MAX/NOPB part is unused and in its original packaging.
Return procedure for LMP8603MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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