My Inquiry
My Account
Analog Devices Inc. LT1999MPMS8-50F#PBF
- Part No.:
- LT1999MPMS8-50F#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1999MPMS8-50F#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,738
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1999MPMS8-50F#PBF from Analog Devices is a high-voltage, bidirectional current sense amplifier with 50V/V fixed gain, –5V to 80V input common mode range, 1.2MHz small-signal bandwidth, and operation from –55°C to 150°C. It senses current via external shunt resistor and outputs a voltage referenced to an adjustable REF pin, enabling precise monitoring in H-bridge motor control, battery charge/discharge, and high-side/low-side power stage applications.
For engineers reviewing the LT1999MPMS8-50F#PBF datasheet, LT1999MPMS8-50F#PBF pinout, LT1999MPMS8-50F#PBF application, or LT1999MPMS8-50F#PBF equivalent, this page delivers verified specifications, FMEA-optimized MSOP-8 pinout, automotive-grade temperature performance, and real-world use context for high-reliability current sensing in harsh environments.
Technical Context
The LT1999MPMS8-50F#PBF uses matched on-chip resistive input networks (R+IN/R–IN ≈ 4kΩ each) and transconductance amplification to convert differential shunt voltage into a current, which is then converted to output voltage by a transresistance amplifier with RG = 200kΩ. Its architecture ensures smooth, continuous operation across the full –5V to 80V common mode range without gain or offset discontinuity.
It features dual-mode REF pin operation: internally biased at mid-supply (2.5V @ V+ = 5V) via 160kΩ/160kΩ divider, or externally driven within 1.125V to (V+ – 1.125V). Shutdown is controlled by SHDN pin with <10µA quiescent current, and the FMEA-optimized pinout relocates NC to Pin 3 to prevent misconnection-induced failure modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V ±0.5% - enables accurate 20mV full-scale shunt voltage to produce ±1V output swing |
| Common Mode Range | –5V to 80V - supports direct sensing in 48V, 60V, and 72V industrial and automotive power rails |
| Bandwidth | 1.2MHz - sufficient for PWM-based current loop feedback in switching supplies up to ~200kHz |
| Input Offset Voltage | ±500µV max - ensures ≤1% error at 10mV sense voltage, critical for low-current precision |
| Operating Temp | –55°C to 150°C - qualified for under-hood automotive, aerospace, and industrial motor drive environments |
| Supply Current | 1.55mA active / <10µA shutdown - enables always-on monitoring with ultra-low standby power |
| CMRR | ≥96dB at DC, ≥75dB at 100kHz - rejects noise from noisy high-voltage switching nodes |
Pinout & Package
LT1999MPMS8-50F#PBF is housed in an 8-lead plastic MSOP package with FMEA-optimized pinout engineered to reduce risk of incorrect PCB layout or assembly. This variant places NC on Pin 3, separating +IN (Pin 1) and –IN (Pin 2) from adjacent power/ground pins to minimize routing errors and improve functional safety compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Positive Sense Input | Connects to high-side of shunt; accepts common mode up to 80V with matched 4kΩ input impedance |
| –IN (Pin 2) | Negative Sense Input | Connects to low-side of shunt; forms differential pair with +IN for bidirectional current polarity detection |
| NC (Pin 3) | No Connect | FMEA-optimized placement prevents accidental shorting or misrouting during layout or assembly |
| V+ (Pin 4) | Power Supply | 4.5V–5.5V supply input; Pins 1 and 4 are internally tied - decoupling required at Pin 4 |
| GND (Pin 5) | Ground Reference | Return path for internal bias and output stage; must be low-impedance connection to system ground |
| REF (Pin 6) | Output Common-Mode Reference | Sets output midpoint; can be floated (2.5V default) or driven externally between 1.125V and (V+ – 1.125V) |
| OUT (Pin 7) | Analog Output | Low-impedance voltage output (0.15Ω); drives ≤200pF directly; requires series R ≥100Ω for larger capacitive loads |
| SHDN (Pin 8) | Shutdown Control | Active-low enable; <0.5V = shutdown (<10µA), >V+ – 0.5V = active; internal 2µA pull-up if floating |
Key Features
| Feature | Design Value |
|---|---|
| FMEA-Optimized Pinout | NC placed on Pin 3 isolates sense inputs from adjacent power/ground, reducing risk of short-circuit failure during manufacturing or field repair |
| High-Voltage Common Mode | –5V to 80V range allows direct integration into 48V EV systems, telecom rectifiers, and industrial 60V bus monitoring without level-shifting |
| Bidirectional Sensing | Output polarity relative to REF indicates current direction - enables regenerative braking and battery charge/discharge state detection |
| Automotive-Qualified | AEC-Q100 Grade 1 (–40°C to 125°C) and MP-grade (–55°C to 150°C) versions support under-hood deployment in traction inverters and DC-DC converters |
| Robust ESD Protection | 4kV HBM and 1kV CDM tolerance ensure reliability during handling and board-level assembly in high-volume production |
Applications
| H-Bridge Motor Control | Battery Management System |
|---|---|
Use Scenario: Monitoring armature current in 48V BLDC motor drives with regenerative braking capability. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier providing real-time magnitude and polarity feedback to PWM controller for torque and energy recovery control. Use Value: Enables precise current limiting at 80V rail with 1.2MHz bandwidth, supporting fast transient response during commutation and brake events. | Use Scenario: Measuring charge/discharge current in lithium-ion battery packs used in e-bikes and energy storage systems. IC Role / Device Role / Timing Role: High-side or low-side shunt monitor interfacing with ADC and protection MCU to compute state-of-charge and detect overcurrent faults. Use Value: ±500µV offset and 96dB CMRR ensure <1% error across –20°C to 70°C operating range, improving SoC accuracy and cycle life estimation. |
| Industrial Switching Power Supply | Fuse/MOSFET Health Monitoring |
Use Scenario: Real-time current sensing in 60V telecom rectifier output stage for load sharing and OCP protection. IC Role / Device Role / Timing Role: High-common-mode amplifier feeding analog comparator and digital controller to enforce fast overcurrent shutdown (<2.5µs settling). Use Value: 0.8µs common-mode step recovery time ensures stable output during 50V transients from MOSFET switching, preventing false trips. | Use Scenario: Continuous monitoring of fuse voltage drop or MOSFET RDS(on) in high-reliability PLC I/O modules. IC Role / Device Role / Timing Role: Precision differential amplifier detecting millivolt-level changes indicating fuse degradation or MOSFET aging. Use Value: 50V/V gain and 1.5mV max offset allow resolution of <30µA drift in 50mΩ shunt, enabling predictive maintenance before catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QPWRQ1 | 50V/V gain, –4V to 80V CM range, 4.5V–5.5V supply, but only –40°C to 125°C grade available (no MP) | Lacks extended temperature range; no 150°C qualification for under-hood or aerospace use | Select when AEC-Q100 Grade 0/1 suffices and extended temp is not required |
| MAX40056ATA+T | 50V/V gain, –5V to 65V CM range, 3.3V/5V supply, 1.5MHz bandwidth, –40°C to 125°C | Lower max common mode (65V vs 80V); not rated for 72V industrial rails or 48V EV battery packs with headroom | Select for cost-sensitive 3.3V systems where 65V CM is sufficient and 150°C operation is unnecessary |
Compared with INA240A1QPWRQ1 and MAX40056ATA+T, the LT1999MPMS8-50F#PBF uniquely delivers 80V common mode tolerance combined with –55°C to 150°C operation and FMEA-optimized pinout - making it the only option qualified for mission-critical, high-temperature, high-voltage current sensing in automotive traction and industrial power conversion.
Availability
LT1999MPMS8-50F#PBF is available at Aetrix Electronics and suitable for H-bridge motor control, battery management systems, and industrial switching power supplies requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for LT1999MPMS8-50F#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 product line delivers high-voltage, precision current sensing for demanding power electronics applications - designed specifically for robustness in motor drives, battery systems, and high-reliability power conversion where accuracy, wide common mode, and extended temperature operation are essential.
FAQ
What is the maximum common mode voltage supported by the LT1999MPMS8-50F#PBF?
The LT1999MPMS8-50F#PBF supports a continuous input common mode voltage range of –5V to 80V across its full operating temperature range of –55°C to 150°C. This specification is guaranteed per the Absolute Maximum Ratings and Electrical Characteristics tables in the official Analog Devices datasheet Rev. E, enabling direct sensing on 48V, 60V, and 72V power rails without external level-shifting circuitry.
Does the LT1999MPMS8-50F#PBF require external resistors for REF pin biasing?
No, the LT1999MPMS8-50F#PBF includes an internal 160kΩ/160kΩ resistive divider that biases the REF pin at mid-supply (2.5V when V+ = 5V) when left unconnected. External biasing is optional and only needed when a specific output common-mode level is required - in which case the REF pin accepts voltages from 1.125V to (V+ – 1.125V) with 60kΩ to 100kΩ input impedance.
How does the FMEA-optimized pinout of the LT1999MPMS8-50F#PBF differ from the original MSOP version?
The LT1999MPMS8-50F#PBF uses the FMEA-optimized MSOP pinout where Pin 3 is designated NC (no connect), while +IN and –IN are relocated to Pins 1 and 2 respectively. This differs from the original MSOP (non-F) version where +IN and –IN occupy Pins 2 and 3 - reducing risk of misrouting, solder bridging, or incorrect shunt connection during PCB layout and assembly in safety-critical applications.
What is the typical supply current of the LT1999MPMS8-50F#PBF in active and shutdown modes?
In active mode, the LT1999MPMS8-50F#PBF draws 1.55mA typical supply current when VCM > 5.5V and V+ = 5V. In shutdown mode (SHDN ≤ 0.5V), supply current drops to <10µA - verified across the full –55°C to 150°C temperature range. These values are specified in the Electrical Characteristics table (Rev. E, pages 5–7) and confirmed in Typical Performance Characteristics (Figure G04).
Can the LT1999MPMS8-50F#PBF be used for both high-side and low-side current sensing?
Yes, the LT1999MPMS8-50F#PBF supports both high-side and low-side current sensing due to its –5V to 80V input common mode range and bidirectional output polarity. When used in low-side configuration, the shunt is placed between load and ground; in high-side, between supply and load. The device maintains 0.5% gain accuracy and sub-mV offset across the entire range, as validated in the Gain Error vs Input Common Mode Voltage plot (Figure G16).
LT1999MPMS8-50F#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 1.2 MHz
- Current - Input Bias:
- 137.5 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 5.8mA
- Current - Output / Channel:
- 40 mA
- 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-MSOP
LT1999MPMS8-50F#PBF FAQ
1.How can I place an order for LT1999MPMS8-50F#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1999MPMS8-50F#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 LT1999MPMS8-50F#PBF reliable?
The price and inventory of LT1999MPMS8-50F#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1999MPMS8-50F#PBF is usually 5 days.
3.What payment methods are accepted for LT1999MPMS8-50F#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1999MPMS8-50F#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1999MPMS8-50F#PBF?
LT1999MPMS8-50F#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1999MPMS8-50F#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 LT1999MPMS8-50F#PBF?
For technical support, including LT1999MPMS8-50F#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1999MPMS8-50F#PBF requirements.
6.How does Aetrix verify that LT1999MPMS8-50F#PBF is sourced from the original manufacturer or authorized distributors?
All LT1999MPMS8-50F#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 LT1999MPMS8-50F#PBF meets industry standards.
7.What is the process for return or replacement of LT1999MPMS8-50F#PBF?
All LT1999MPMS8-50F#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1999MPMS8-50F#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 LT1999MPMS8-50F#PBF part is unused and in its original packaging.
Return procedure for LT1999MPMS8-50F#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1999MPMS8-50F#PBF Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
