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Monolithic Power Systems Inc. MP8110DS-LF-Z
- Part No.:
- MP8110DS-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP8110DS-LF-Z.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,438
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Product details
Overview
MP8110DS-LF-Z from Monolithic Power Systems is a precision high-side current-sense amplifier with 1.4V–40V input common-mode range independent of supply, 400µV typical input offset voltage, 12µA typical supply current, and dual buffered outputs (OUT1 for resistive loads, OUT2 for capacitive loads). It enables accurate battery discharge monitoring in portable systems without disrupting ground paths.
For engineers reviewing the MP8110DS-LF-Z datasheet, MP8110DS-LF-Z pinout, MP8110DS-LF-Z application, or MP8110DS-LF-Z equivalent, key selection criteria include input common-mode independence from VCC, dual-output drive capability, shutdown current below 6µA, gain-setting resistor interface, and SOIC8 package thermal performance (θJA = 90°C/W).
Technical Context
The MP8110 operates as a high-side current-sense amplifier using an internal P-channel MOSFET to mirror sensed current through external gain resistors RG1/RG2. Its input common-mode range (1.4V–40V) remains fully functional even at 2-cell Li-ion deep-discharge voltages (~1.8V/cell), enabling uninterrupted battery telemetry.
It features two independent output stages: OUT1 delivers up to 500µA into resistive loads with ±2% current accuracy at 100mV sense voltage; OUT2 supplies up to 5mA into capacitive loads with separate offset and rise/fall time specs (tR/tF ≈ 17–29µs), supporting mixed-signal signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 40V - supports direct connection to 12V/24V/36V battery rails and wide-input DC-DC outputs. |
| Input Common-Mode Range | 1.4V to 40V, independent of VCC - ensures valid sensing during battery deep discharge (e.g., 2.8V total for 2S Li-ion) without supply dependency. |
| Input Offset Voltage (OUT1) | 0.4mV (min) to 2mV (max) - enables sub-1% error at ≥100mV sense voltage, critical for low-current battery monitoring. |
| Supply Current (Typ.) | 12µA - minimizes quiescent drain in always-on battery fuel gauging circuits. |
| Shutdown Current (Typ.) | 3µA - allows ultra-low-power sleep mode in energy-constrained portable devices. |
| PSRR | 70dB (min), 97dB (typ.) - rejects supply ripple in noisy DC-DC environments without external filtering. |
| OUT1 Output Drive | 500µA max - sufficient to drive 10kΩ load with ≤5mV drop, enabling direct ADC interfacing. |
Pinout & Package
MP8110DS-LF-Z is packaged in an 8-pin SOIC (SOIC8) with standard JEDEC MS-012AA footprint, 1.27mm pitch, and 90°C/W junction-to-ambient thermal resistance. Pin 1 marked with notch or bevel; lead finish is RoHS-compliant matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN | Active-low shutdown control | Pull to GND for normal operation; >0.9V threshold disables amplifier, reducing ICC to <6µA. |
| 2 NC | No-connect terminal | Internally unconnected; must remain floating or grounded per layout best practice - no routing required. |
| 3 RG1 | Gain resistor input (battery side) | Connects to high-side of sense resistor RS; sets current gain with RG2 and RGS per IOUT1 = ILOAD × RGS/RRG1. |
| 4 GND | Ground reference / battery negative | Serves as return path for both supply and sense circuitry; must be low-impedance to avoid offset errors. |
| 5 OUT1 | Resistive-load output | Buffered current output optimized for 10kΩ–100kΩ loads; delivers precise scaled replica of load current. |
| 6 RG2 | Gain resistor input (load side) | Completes differential sense path across RS; matched with RG1 to maintain gain accuracy and CMRR. |
| 7 VCC | Positive supply input | Accepts 2.5V–40V; powers internal amplifier and buffers; decoupling capacitor (≥0.1µF) required at pin. |
| 8 OUT2 | Capacitive-load output | Higher-drive buffer (5mA) for driving ADC sample capacitors or long traces; 26–29µs rise/fall time. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output stages | OUT1 (500µA, low-offset) and OUT2 (5mA, fast transient) enable simultaneous analog telemetry and digital sampling without signal contention. |
| Supply-independent common-mode range | 1.4V–40V operation regardless of VCC value - eliminates need for level-shifting in multi-rail battery systems. |
| Ultra-low quiescent current | 12µA typical supply draw - extends runtime in always-on battery fuel gauge subsystems by >10× vs. legacy amplifiers. |
| Integrated shutdown control | Logic-compatible SHDN pin reduces ICC to <6µA - supports host MCU-controlled power gating in portable firmware. |
| Matched gain-resistor interface | RG1/RG2 pins accept discrete 2kΩ–20kΩ resistors to set gain from 1× to 10× - simplifies calibration and avoids laser-trimmed ICs. |
Applications
| Smart Battery Packs | Portable Test Equipment |
|---|---|
|
Use Scenario: Real-time cell current monitoring during charge/discharge cycles in 2S–3S Li-ion packs with deep-discharge protection. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-referenced current feedback to fuel gauge MCU. Use Value: Maintains sensing validity down to 1.4V common-mode (e.g., 2.8V pack under load), preventing false undervoltage cutoff. |
Use Scenario: Precision current sourcing/sinking verification in handheld multimeters and portable DMM modules. IC Role / Device Role / Timing Role: Dual-output current monitor feeding both analog meter movement and ADC sampling path. Use Value: OUT1 drives analog display with <2mV offset; OUT2 drives 1MSPS ADC with 26µs rise time - no external op-amp needed. |
| Notebook PC Power Management | Energy Management Systems |
|
Use Scenario: System-level battery discharge current tracking in ultrabooks with dynamic CPU/GPU load scaling. IC Role / Device Role / Timing Role: High-side sense amplifier feeding SMBus/I²C fuel gauge IC with calibrated current data. Use Value: 12µA ICC enables continuous monitoring without impacting standby battery life; PSRR >70dB suppresses DC-DC switching noise. |
Use Scenario: Load current profiling in solar-powered IoT gateways with LiFePO₄ backup batteries. IC Role / Device Role / Timing Role: Primary current sensor in battery management subsystem, interfacing with microcontroller ADC and watchdog logic. Use Value: Shutdown mode (<6µA) allows seasonal deep-sleep; 40V VCC rating supports 36V nominal solar input rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Single-output (OUT only), 2.7V–76V supply, 125µA ICC, 100µV VOS - higher precision but higher power. | Lacks dual-output architecture; requires external buffer for capacitive loads. | Select when ultra-low offset (<100µV) is mandatory and system can tolerate 10× higher quiescent current. |
| INA240A1D | Single-output, 2.7V–80V supply, 2.4mA ICC, 20µV VOS, integrated 20V ESD - higher integration but no shutdown. | No SHDN pin; fixed gain (20V/V); no independent OUT2 for capacitive drive. | Select when highest accuracy and robustness are prioritized over power efficiency and flexible gain configuration. |
Compared with MAX4080TASA+ and INA240A1D, MP8110DS-LF-Z uniquely balances ultra-low ICC (12µA), dual-output drive, and supply-independent common-mode range - making it optimal for always-on, space-constrained portable battery telemetry where power and layout simplicity are critical.
Availability
MP8110DS-LF-Z is available at Aetrix Electronics and suitable for smart battery packs, portable test equipment, notebook PC power management, and energy management systems requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for MP8110DS-LF-Z 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP8110 belongs to MPS's precision current-sense amplifier product line, engineered specifically for high-side battery current monitoring in portable and energy-efficient systems where ground-path integrity and ultra-low power are essential.
FAQ
What is the function of the NC pin (Pin 2) on MP8110DS-LF-Z?
Pin 2 is a no-connect terminal with no internal connection. It must remain unconnected in PCB layout - neither routed nor tied to GND or any other net. Leaving it floating is acceptable, but grounding it improves mechanical stability and EMI immunity per MPS layout guidelines.
Can MP8110DS-LF-Z operate with a 1.8V common-mode voltage while powered from 3.3V VCC?
Yes. The input common-mode range (1.4V–40V) is explicitly independent of VCC. At VCC = 3.3V, VIN_CM can be as low as 1.4V - fully supporting 1.8V operation, such as monitoring a deeply discharged 2S Li-ion pack (≈2.8V total) under load.
How is gain configured on MP8110DS-LF-Z, and what resistor values are recommended?
Gain is set externally using RG1, RG2, and RGS per the formula IOUT1 = ILOAD × RGS/RRG1. For 10× gain with 2A full-scale current, use RG1 = RG2 = 2kΩ and RGS = 20kΩ. MPS recommends 1% metal-film resistors for <±2% current accuracy.
What is the maximum allowable sense resistor voltage (VSENSE) for MP8110DS-LF-Z?
The absolute maximum differential input voltage across RG1–RG2 is 5V, but for specified accuracy, VSENSE should not exceed +0.25V. Exceeding this risks violating the ±2% current accuracy spec and may cause output saturation or thermal drift in high-current applications.
Does MP8110DS-LF-Z require external compensation components for stability?
No external compensation is required for basic operation. The device integrates internal frequency compensation. However, the datasheet recommends a 100pF CGS capacitor between RG1 and RG2 for optimal transient response and noise rejection when driving long traces or high-capacitance nodes.
Is MP8110DS-LF-Z pin-compatible with other members of the MP81xx family?
No. MP8110 has a unique 8-pin SOIC/MSOP pinout with dual outputs and dedicated RG1/RG2 terminals. MP8111 and MP8112 use different pin configurations and lack the OUT2 buffer - direct replacement is not possible without PCB redesign.
What thermal derating applies to MP8110DS-LF-Z at 85°C ambient?
At TA = 85°C, the SOIC8 package's 90°C/W θJA limits continuous power dissipation to ~800mW. With 12µA ICC and typical load, self-heating is negligible; however, sustained OUT2 current >3mA into heavy capacitive loads requires thermal evaluation per the 65°C/W θJC spec.
MP8110DS-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- 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:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 12µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP8110DS-LF-Z FAQ
1.How can I place an order for MP8110DS-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8110DS-LF-Z 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 MP8110DS-LF-Z reliable?
The price and inventory of MP8110DS-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8110DS-LF-Z is usually 5 days.
3.What payment methods are accepted for MP8110DS-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8110DS-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8110DS-LF-Z?
MP8110DS-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8110DS-LF-Z 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 MP8110DS-LF-Z?
For technical support, including MP8110DS-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8110DS-LF-Z requirements.
6.How does Aetrix verify that MP8110DS-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP8110DS-LF-Z 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 MP8110DS-LF-Z meets industry standards.
7.What is the process for return or replacement of MP8110DS-LF-Z?
All MP8110DS-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8110DS-LF-Z, 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 MP8110DS-LF-Z part is unused and in its original packaging.
Return procedure for MP8110DS-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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