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Texas Instruments LMP8603MMX/NOPB
- Part No.:
- LMP8603MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMP8603MMX/NOPB.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,608
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Product details
Overview
LMP8603MMX/NOPB from Texas Instruments is a fixed-gain, bidirectional current-sense amplifier with 100× precision gain, –22V to +60V input common-mode voltage range at 5V supply, and ±1mV maximum input offset voltage. It features in-line filter capability via A1/A2 pins, 90dB minimum CMRR, and ±10μV/°C TCVOS for high-accuracy shunt-based current monitoring in industrial power stages and server VRMs.
For engineers reviewing the LMP8603MMX/NOPB datasheet, LMP8603MMX/NOPB pinout, LMP8603MMX/NOPB application, or LMP8603MMX/NOPB equivalent, key selection criteria include its 100× gain accuracy, rail-to-rail output swing at 5V, dual-stage architecture enabling external filtering, and support for bidirectional sensing via OFFSET pin configuration.
Technical Context
The LMP8603MMX/NOPB implements a two-stage signal path: a chopping-stabilized preamplifier with 10× gain and trimmed 100kΩ output impedance (A1), followed by a buffer stage with 10× gain (K2 = 10). This architecture enables precise amplification of millivolt-level shunt voltages while rejecting high common-mode transients up to ±60V.
Its level-shift input stage uses internal resistors to convert differential voltage to current, allowing fault-tolerant operation under large differential inputs. The A1 and A2 pins provide direct access between stages, permitting external RC filtering or gain adjustment without affecting preamplifier stability or offset performance.
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 - supports high-side sensing in 48V systems and negative rail monitoring |
| Input Offset Voltage | ±1 mV max - enables accurate detection of ≤10mV shunt drops (e.g., 10mΩ @ 1A) |
| TCVOS | ±10 μV/°C max - ensures <±0.3mV drift over –40°C to +125°C ambient |
| CMRR | 90 dB min (–20V to +60V, f = 1kHz) - rejects noise from switching power rails |
| Bandwidth | 60 kHz - supports real-time current feedback in DC/DC converters up to 500kHz switching |
| Supply Current | 1.1 mA typical at 5V - suitable for always-on monitoring in energy-sensitive systems |
Pinout & Package
DGK package: 8-pin VSSOP, 3.00mm × 4.90mm body, 0.65mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Negative input | Connects to low-side of current shunt; accepts –22V to +60V common-mode |
| 2: GND | Power ground | Analog and power reference; requires low-impedance PCB connection |
| 3: +IN | Positive input | Connects to high-side of shunt; matched to –IN for CMRR optimization |
| 4: A2 | Buffer input | Receives filtered/preconditioned signal from A1; enables external gain tuning |
| 5: OUT | Single-ended output | 100× amplified, rail-to-rail (0.01V to 4.99V at 5V supply) voltage output |
| 6: VS | Positive supply | 5V nominal (3–5.5V operating range); powers both preamp and buffer stages |
| 7: OFFSET | Bidirectional bias control | Sets output mid-scale (2.5V) for bidirectional current; connect to VS/2 or DAC |
| 8: A1 | Preamplifier output | 10× amplified signal with 100kΩ source impedance; connects to A2 via RC network |
Key Features
| Feature | Design Value |
|---|---|
| In-line filter capability | A1 and A2 pins expose internal gain node, enabling insertion of RC filters to suppress PWM noise before final amplification |
| Chopping-stabilized input stage | Reduces 1/f noise and thermal drift, delivering ±10μV/°C TCVOS and <1μVpp 0.1–10Hz noise |
| Rail-to-rail output swing | OUT swings to within 10mV of GND and 15mV of VS at 5V supply, maximizing dynamic range into ADCs |
| Fault-tolerant input structure | Level-shift resistors withstand >±80V differential input without damage-survives MOSFET shoot-through events |
| Bidirectional sensing support | OFFSET pin allows DC biasing of output to mid-supply, enabling positive/negative current detection on single 5V rail |
Applications
| Motor Control Feedback | Server VRM Monitoring |
|---|---|
Use Scenario: Real-time phase current measurement in 3-phase BLDC motor drivers using low-value shunts. IC Role / Device Role / Timing Role: Amplifies mV-level differential shunt voltage with 60kHz bandwidth and 90dB CMRR to reject inverter switching noise. Use Value: Enables closed-loop torque control with <1% current error across –40°C to +125°C, eliminating need for calibration per unit. | Use Scenario: High-accuracy output current monitoring in Intel server VRMs with 48V input and 0.8–1.8V output. IC Role / Device Role / Timing Role: Senses bidirectional current through 0.5mΩ shunt with ±100A range; OFFSET pin biased to 2.5V for polarity detection. Use Value: Delivers ±0.5% gain accuracy and ±1mV offset to meet PMBus current reporting requirements without software correction. |
| Industrial DC/DC Converter | Field Transmitter Loop |
Use Scenario: Input/output current supervision in isolated 24V–48V telecom DC/DC modules with safety-critical overcurrent protection. IC Role / Device Role / Timing Role: Monitors primary-side current during startup and fault conditions; leverages –22V to +60V common-mode range for high-side sensing. Use Value: Detects 10A overcurrent within 5μs (rising edge settling time) using 100× gain and 0.83V/μs slew rate, triggering shutdown before MOSFET failure. | Use Scenario: 4–20mA loop-powered field transmitter measuring process current with intrinsic safety compliance. IC Role / Device Role / Timing Role: Amplifies shunt voltage in low-power, loop-powered design; operates from 3.3V supply with 0.45mA min supply current. Use Value: Achieves ±0.15% midscale offset scaling accuracy and <±0.3mV total offset drift over temperature, meeting SIL-2 diagnostic coverage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDGKRQ1 | 50× gain, –5V to +85V common-mode, integrated EMI filter, AEC-Q100 qualified | Automotive-grade; higher common-mode but lower gain limits resolution on small shunts | Select for automotive systems requiring ASIL-B compliance; not drop-in due to different pinout and gain |
| MAX40016AUB+ | 100× gain, –0.1V to +65V common-mode, 1.5MHz bandwidth, no A1/A2 filter access | Higher speed for fast transient detection; lacks in-line filter capability and bidirectional OFFSET control | Select when bandwidth >100kHz is required and external filtering is unnecessary; pin-compatible replacement not supported |
Compared with INA240A1QDGKRQ1 and MAX40016AUB+, the LMP8603MMX/NOPB uniquely provides accessible A1/A2 nodes for custom filtering, precise 100× gain with ±0.5% error, and dedicated OFFSET pin for true bidirectional operation on single supply-making it optimal for industrial and server power monitoring where signal conditioning flexibility and DC accuracy are critical.
Availability
LMP8603MMX/NOPB is available at Aetrix Electronics and suitable for server VRM current monitoring, industrial DC/DC converter protection, and motor control feedback requiring stable component supply and long-term manufacturability.
Supply support for LMP8603MMX/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 ICs.
The LMP860x family was designed specifically for high-accuracy, high-common-mode current sensing in industrial power supplies, server VRMs, and motor drives-emphasizing low drift, fault tolerance, and flexible signal conditioning.
FAQ
What is the maximum common-mode voltage the LMP8603MMX/NOPB supports at 5V supply?
The LMP8603MMX/NOPB supports a common-mode input voltage range of –22V to +60V when operated from a 5V supply, as specified in the absolute maximum and recommended operating conditions. This enables reliable high-side sensing in 48V systems and compatibility with negative-rail monitoring applications without external level-shifting circuitry.
How does the A1 and A2 pin interface enable external filtering in the LMP8603MMX/NOPB?
The LMP8603MMX/NOPB exposes its internal preamplifier output at the A1 pin (10× gain) and feeds that signal into the buffer stage via the A2 pin. A user-inserted RC network between A1 and A2 acts as a first-order low-pass filter, attenuating high-frequency noise-such as PWM switching artifacts-before final 10× amplification, preserving DC accuracy while improving SNR.
Can the LMP8603MMX/NOPB measure bidirectional current on a single 5V supply?
Yes, the LMP8603MMX/NOPB supports true bidirectional current sensing on a single 5V supply using its dedicated OFFSET pin. When the OFFSET pin is biased to 2.5V (e.g., via resistor divider or DAC), the output centers at 2.5V: positive current produces output >2.5V, negative current yields output <2.5V-enabling full-range detection without dual supplies or level-shifting op-amps.
What is the typical output swing capability of the LMP8603MMX/NOPB at 5V supply?
At 5V supply, the LMP8603MMX/NOPB delivers rail-to-rail output swing: minimum high-level output is 4.98V (within 20mV of VS), and maximum low-level output is 10mV above GND, as verified across –40°C to +125°C. This 4.97V dynamic range maximizes utilization of 12-bit ADCs and reduces quantization error in precision current digitization.
Does the LMP8603MMX/NOPB require external compensation for stability with capacitive loads?
No, the LMP8603MMX/NOPB is internally compensated and remains stable driving up to 100pF capacitive load without isolation resistors. This eliminates the need for external series resistors in ADC interface designs, preserving signal integrity and simplifying layout-verified across all operating conditions including –40°C to +125°C and full common-mode range.
LMP8603MMX/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
LMP8603MMX/NOPB FAQ
1.How can I place an order for LMP8603MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP8603MMX/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 LMP8603MMX/NOPB reliable?
The price and inventory of LMP8603MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP8603MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP8603MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP8603MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP8603MMX/NOPB?
LMP8603MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP8603MMX/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 LMP8603MMX/NOPB?
For technical support, including LMP8603MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP8603MMX/NOPB requirements.
6.How does Aetrix verify that LMP8603MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP8603MMX/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 LMP8603MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP8603MMX/NOPB?
All LMP8603MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP8603MMX/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 LMP8603MMX/NOPB part is unused and in its original packaging.
Return procedure for LMP8603MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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