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Analog Devices Inc. LT1999MPS8-10#PBF
- Part No.:
- LT1999MPS8-10#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1999MPS8-10#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
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Product details
Overview
LT1999MPS8-10#PBF from Analog Devices is a high-voltage, bidirectional current sense amplifier with 10V/V fixed gain, –5V to 80V input common mode range, 2MHz bandwidth, and ±0.5% gain accuracy. It operates from a 4.5V–5.5V supply, draws 1.55mA, and supports high-side or low-side shunt sensing in motor control, battery monitoring, and PWM power stages.
For engineers reviewing the LT1999MPS8-10#PBF datasheet, LT1999MPS8-10#PBF pinout, LT1999MPS8-10#PBF application, or LT1999MPS8-10#PBF equivalent, this page delivers verified specifications, FMEA-optimized SO-8 pinout, automotive-grade thermal performance (–55°C to 150°C), and real-world use cases for H-bridge current monitoring and fuse/MOSFET health diagnostics.
Technical Context
The LT1999MPS8-10#PBF uses matched internal resistor networks (R+IN/R–IN = 4kΩ each) and transconductance amplification to convert differential shunt voltage into a referenced output. Its architecture enables smooth, continuous operation across the full –5V to 80V common mode range without gain discontinuity or offset shift.
It features an internal 160kΩ/160kΩ divider setting REF to mid-supply by default, but allows external reference override within 1.5V to V+–1.25V. Shutdown mode reduces supply current to <10µA via SHDN pin control with 1µs turn-on/off timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 10V/V fixed - provides precise scaling of ±350mV shunt voltage to ±3.5V output swing |
| Common Mode Range | –5V to 80V - enables direct sensing in 48V industrial systems and 60V automotive battery rails |
| Bandwidth | 2MHz - supports accurate current capture in fast-switching 500kHz+ DC-DC converters |
| Gain Accuracy | ±0.5% max - ensures ≤17.5mV error at full-scale ±350mV input for precision closed-loop control |
| Input Offset Voltage | ±1.5mV max - contributes ≤15mV output error at 10× gain, critical for low-current detection |
| Operating Temp | –55°C to 150°C - qualified for under-hood automotive and harsh industrial environments |
| Supply Current | 1.55mA active / <10µA shutdown - enables always-on monitoring with ultra-low standby power |
Pinout & Package
LT1999MPS8-10#PBF is housed in an 8-lead plastic SO (narrow) package (S8), RoHS-compliant, with lead-free finish and moisture sensitivity level 1. The pinout matches the standard SO-8 footprint and is identical to LT1999CS8-10#PBF and LT1999IS8-10#PBF variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ (Pins 1, 4) | Power supply input | Internally tied pins accept 4.5V–5.5V; supports operation down to ~4V (unspecified) |
| +IN (Pin 2) | Positive sense input | Connects to high-side of shunt; ESD-protected to –5.25V/88V |
| –IN (Pin 3) | Negative sense input | Connects to low-side of shunt; matched impedance with +IN for CMRR >96dB |
| GND (Pin 5) | Analog ground reference | Return path for REF divider and output stage; separate from power ground in layout-critical designs |
| REF (Pin 6) | Output common-mode reference | Defaults to V+/2; externally programmable between 1.5V and V+–1.25V for custom output centering |
| OUT (Pin 7) | Amplified output | Low-impedance (0.15Ω), drives ≥200pF directly; swings within 125mV of rails at 1kΩ load |
| SHDN (Pin 8) | Shutdown control | Pulled low (<0.5V) disables amplifier; floating or >V+–0.5V enables operation via 2µA internal pull-up |
Key Features
| Feature | Design Value |
|---|---|
| FMEA-optimized SO-8 pinout | Identical to standard SO-8 layout - eliminates risk of misrouting during board assembly and rework |
| High-side/low-side flexibility | Operates with shunt placed on either side of load - simplifies PCB routing in constrained space |
| 4kV HBM ESD tolerance | Robust against handling and system-level transients - reduces need for external protection in 24V/48V systems |
| AC CMRR >80dB @100kHz | Maintains accuracy in noisy switching environments - critical for PWM current loop stability |
| Smooth CM transition | No gain or offset discontinuity when VCM crosses V+ - ensures reliable operation during bus fault recovery |
Applications
| H-Bridge Motor Control | Solenoid Current Sense |
|---|---|
Use Scenario: Real-time phase current measurement in 48V BLDC motor drivers with regenerative braking. IC Role / Device Role / Timing Role: Bidirectional current amplifier referenced to mid-supply, enabling polarity-sensitive PWM feedback. Use Value: Enables precise torque control and overcurrent shutdown within 2.5µs settling time after current step. | Use Scenario: Monitoring solenoid coil current during actuation in automotive transmission control units. IC Role / Device Role / Timing Role: High-CMRR analog front-end converting shunt voltage to microcontroller ADC input. Use Value: Detects open-circuit faults and coil degradation using ±1.5mV offset and 0.5% gain accuracy over –40°C to 125°C. |
| Battery Charge/Discharge Monitor | PWM Power Stage Diagnostics |
Use Scenario: Bidirectional current sensing across battery pack shunt in EV auxiliary power modules. IC Role / Device Role / Timing Role: High-voltage sense amplifier interfacing with isolated ADC or MCU via REF-adjustable output. Use Value: Supports full charge-to-depletion monitoring with 80V CM range and 150°C junction rating for under-hood placement. | Use Scenario: In-situ MOSFET health check via drain-source current signature analysis in industrial SMPS. IC Role / Device Role / Timing Role: Fast-settling current sensor capturing transient spikes during gate drive switching edges. Use Value: Delivers 0.8µs common-mode recovery for accurate current capture during 50V bus transients. |
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 | 20V/V gain, 85V CM range, 4.5V–5.5V supply, 1.1mA quiescent current | Higher gain option; lower offset (±20µV) but narrower temp range (–40°C to 125°C) | Select for higher-precision, lower-power systems where 20× gain suffices and extended temperature is not required |
| MAX40056ASA+T | 10V/V gain, 65V CM range, 3.3V–5.5V supply, 1.8mA quiescent current | Wider supply range; lower CM capability and no MP-grade qualification | Select for cost-sensitive 3.3V systems where 65V CM coverage is sufficient and AEC-Q100 is not mandated |
Compared with INA240A1QDRQ1 and MAX40056ASA+T, the LT1999MPS8-10#PBF uniquely combines MP-grade temperature support (–55°C to 150°C), FMEA-aligned SO-8 pinout, and guaranteed 0.5% gain accuracy across its full operating range - making it optimal for mission-critical automotive and industrial power monitoring.
Availability
LT1999MPS8-10#PBF is available at Aetrix Electronics and suitable for H-bridge motor controls, battery management systems, and industrial power supplies requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LT1999MPS8-10#PBF 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1999 family was designed specifically for high-voltage, high-accuracy bidirectional current sensing in demanding power conversion and motor control applications - emphasizing robustness, wide common mode range, and seamless operation across rail transitions.
FAQ
What is the maximum common mode voltage supported by the LT1999MPS8-10#PBF?
The LT1999MPS8-10#PBF supports a continuous input common mode voltage range of –5V to 80V. This is validated per Absolute Maximum Ratings and Electrical Characteristics tables, enabling direct connection to 48V industrial buses and 60V automotive battery rails without external level-shifting circuitry. Operation beyond 80V risks triggering internal ESD clamps and is not guaranteed.
Does the LT1999MPS8-10#PBF require external resistors for gain setting?
No, the LT1999MPS8-10#PBF has a fixed 10V/V gain implemented with laser-trimmed on-chip resistors. Unlike programmable current sense amplifiers, it requires no external gain-setting components - simplifying layout, reducing BOM count, and ensuring consistent performance across temperature and unit-to-unit variation.
How does the REF pin function in the LT1999MPS8-10#PBF?
The REF pin in the LT1999MPS8-10#PBF sets the output common-mode voltage. By default, it floats at V+/2 via internal 160kΩ/160kΩ resistors. It can be overdriven externally within 1.5V to V+–1.25V to center the output at a custom voltage - essential for interfacing with ADCs having non-mid-rail reference points or for differential signaling.
Is the LT1999MPS8-10#PBF pin-compatible with other LT1999 variants in SO-8 packages?
Yes, the LT1999MPS8-10#PBF shares identical SO-8 pinout and footprint with LT1999CS8-10#PBF, LT1999IS8-10#PBF, and LT1999HS8-10#PBF. All use the same pin assignment (V+, +IN, –IN, V+, GND, REF, OUT, SHDN), enabling drop-in replacement across temperature grades without PCB revision.
What is the shutdown current consumption of the LT1999MPS8-10#PBF?
In shutdown mode (SHDN pin pulled <0.5V), the LT1999MPS8-10#PBF draws less than 10µA typical supply current - verified across –55°C to 150°C. This ultra-low standby power enables always-on current monitoring in battery-backed systems while minimizing parasitic drain.
LT1999MPS8-10#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2 MHz
- Current - Input Bias:
- 137.5 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 5.8mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1999MPS8-10#PBF FAQ
1.How can I place an order for LT1999MPS8-10#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1999MPS8-10#PBF 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 LT1999MPS8-10#PBF reliable?
The price and inventory of LT1999MPS8-10#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1999MPS8-10#PBF is usually 5 days.
3.What payment methods are accepted for LT1999MPS8-10#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1999MPS8-10#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1999MPS8-10#PBF?
LT1999MPS8-10#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1999MPS8-10#PBF 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 LT1999MPS8-10#PBF?
For technical support, including LT1999MPS8-10#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1999MPS8-10#PBF requirements.
6.How does Aetrix verify that LT1999MPS8-10#PBF is sourced from the original manufacturer or authorized distributors?
All LT1999MPS8-10#PBF 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 LT1999MPS8-10#PBF meets industry standards.
7.What is the process for return or replacement of LT1999MPS8-10#PBF?
All LT1999MPS8-10#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1999MPS8-10#PBF, 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 LT1999MPS8-10#PBF part is unused and in its original packaging.
Return procedure for LT1999MPS8-10#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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