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Analog Devices Inc. LT1999HS8-10#PBF
- Part No.:
- LT1999HS8-10#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1999HS8-10#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
LT1999HS8-10#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 sensing in H-bridge motor control and battery charge monitoring.
For engineers reviewing the LT1999HS8-10#PBF datasheet, LT1999HS8-10#PBF pinout, LT1999HS8-10#PBF application, or LT1999HS8-10#PBF equivalent, this page delivers verified electrical specs, FMEA-optimized SO-8 pin configuration, thermal performance up to 125°C ambient, and automotive-grade AEC-Q100 qualification for reliable deployment in industrial power systems and EV subsystems.
Technical Context
The LT1999HS8-10#PBF uses matched on-chip resistor networks (R+IN/R–IN = 4kΩ each) and transconductance amplification to convert differential shunt voltage into a level-shifted output referenced to the REF pin. Its architecture enables smooth, continuous operation across the full –5V to 80V common mode range without gain discontinuity or offset shift.
It features internal 160kΩ/160kΩ mid-supply divider for default REF bias, supports external REF override (1.5V to V+–1.25V), and integrates a 2µA internal pull-up on SHDN for automatic active-mode startup when left floating. Shutdown current is <10µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 10V/V ±0.5% - ensures accurate current magnitude resolution within 5mV error at ±0.35V full-scale input. |
| Common Mode Range | –5V to 80V - enables direct sensing in 48V/60V industrial buses and high-side configurations above supply rail. |
| Bandwidth | 2MHz - supports fast transient detection in PWM-controlled motor drives and switching power supplies. |
| Input Offset Voltage | ±1.5mV max - limits current measurement error to ≤150nA at 15mΩ shunt, critical for precision battery monitoring. |
| Supply Current | 1.55mA typical at VCM > 5.5V - enables low-power operation in always-on monitoring circuits. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial environments without derating. |
| Shutdown Current | <10µA - reduces system standby power in energy-sensitive applications like portable test equipment. |
Pinout & Package
LT1999HS8-10#PBF is housed in an 8-lead plastic SO (narrow) package (S8), RoHS-compliant, with 1.27mm lead pitch and JEDEC MS-012AC outline. The pinout follows standard SO-8 configuration optimized for functional safety (FMEA-compatible layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | V+ | Power supply input (4.5V–5.5V); pins internally tied - allows dual-path routing for reduced supply impedance. |
| 2 | +IN | Positive current sense input; ESD-protected to ±5.25V below GND and 88V above GND. |
| 3 | –IN | Negative current sense input; matched impedance with +IN for CMRR >96dB over full range. |
| 5 | GND | Analog ground reference; separate from power ground in PCB layout to minimize noise coupling. |
| 6 | REF | Output common-mode reference; defaults to V+/2 via internal 160k resistors; externally programmable. |
| 7 | OUT | Amplified, level-shifted output; drives ≥200pF directly; requires series R ≥100Ω for larger capacitive loads. |
| 8 | SHDN | Active-low shutdown control; internal 2µA pull-up ensures fail-safe active state if unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Sensing | Outputs polarity-reversed voltage for reverse current flow - enables real-time charge/discharge state detection in battery management. |
| AEC-Q100 Qualified | H-grade temperature rating (–40°C to +125°C) and stress-tested reliability - meets automotive functional safety requirements. |
| FMEA-Optimized Pinout | SO-8 layout separates high-voltage sense inputs (+IN/–IN) from digital control (SHDN) and analog outputs (OUT/REF) - reduces single-point failure risk. |
| High CMRR | 96dB minimum over –5V to 80V range - rejects noise from noisy power rails in motor drive inverters and SMPS. |
| Robust ESD Protection | 4kV HBM / 1kV CDM - withstands handling and board-level transients without external protection components. |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Monitoring bidirectional armature current in 48V brushed DC motor drives used in industrial automation. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to buffered 10× output referenced to mid-supply. Use Value: Enables closed-loop torque control with <±0.5% gain error and 2MHz response to detect stall conditions before thermal damage occurs. | Use Scenario: Measuring battery pack charge/discharge current in electric scooter BMS with 60V max bus voltage. IC Role / Device Role / Timing Role: Bidirectional shunt amplifier interfacing to 16-bit ADC with REF pin tied to ADC reference for ratiometric accuracy. Use Value: Delivers ±150nA current resolution using 15mΩ shunt and maintains accuracy across –20°C to +70°C operating range. |
| Application 3 | Application 4 |
Use Scenario: Real-time fuse health monitoring in telecom power distribution units with 48V DC input. IC Role / Device Role / Timing Role: Low-drift current monitor detecting <5% overcurrent deviation before mechanical fuse activation. Use Value: Uses ±1.5mV VOS and 0.5% gain accuracy to identify incipient fuse degradation at 10A nominal load with 100mΩ shunt. | Use Scenario: PWM-controlled solenoid current regulation in automotive transmission valve bodies. IC Role / Device Role / Timing Role: High-bandwidth current feedback element in current-mode control loop with 2µs settling time. Use Value: Supports 20kHz PWM switching with 0.5% settling error, enabling precise force modulation and reducing mechanical wear. |
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, 80V CM range, 4.5V–5.5V supply, but only 1.1MHz bandwidth and no internal REF divider. | Requires external REF bias network; better suited for higher-gain, lower-bandwidth automotive current loops. | Select when gain >10V/V is needed and REF flexibility outweighs bandwidth loss. |
| MAX4080TASA+ | 10V/V gain, 76V CM range, 4.5V–76V supply, but ±2mV VOS, no AEC-Q100 qualification, and SO-8 pinout differs (REF not on Pin 6). | Lacks automotive qualification and FMEA-optimized layout; suitable for industrial non-automotive use only. | Select for wide-input-voltage industrial systems where AEC-Q100 is not required and layout revision is acceptable. |
Compared with INA240A1QDRQ1 and MAX4080TASA+, the LT1999HS8-10#PBF uniquely combines AEC-Q100 H-grade qualification, integrated mid-supply REF, FMEA-aware SO-8 pinout, and 2MHz bandwidth - making it optimal for automotive motor control and high-reliability industrial current monitoring where layout stability and thermal robustness are critical.
Availability
LT1999HS8-10#PBF is available at Aetrix Electronics and suitable for H-bridge motor control, battery charge/discharge monitoring, and solenoid current sensing requiring stable component supply across automotive and industrial production cycles.
Supply support for LT1999HS8-10#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 product line delivers precision, high-voltage current sensing for demanding power conversion and motor control applications - engineered for accuracy, wide common-mode operation, and functional safety compliance.
FAQ
What is the maximum common mode voltage supported by the LT1999HS8-10#PBF?
The LT1999HS8-10#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 high-side nodes in 48V and 60V industrial systems without level-shifting circuitry. Operation beyond these limits risks permanent damage.
Does the LT1999HS8-10#PBF require external components for basic operation?
No - the LT1999HS8-10#PBF operates with only two 0.1µF supply bypass capacitors. Its internal 160kΩ/160kΩ divider sets REF to V+/2 by default, eliminating need for external bias resistors. External components are optional: a pull-down on SHDN for forced shutdown, or external REF voltage for custom output common-mode level.
Is the LT1999HS8-10#PBF pin-compatible with other LT1999 variants?
Yes - all LT1999 variants (e.g., LT1999HS8-20#PBF, LT1999HS8-50#PBF) share identical SO-8 pinout and footprint. Only gain and internal RG resistor differ; no PCB redesign is needed when scaling gain for different shunt values or dynamic range requirements.
What is the shutdown current consumption of the LT1999HS8-10#PBF?
The LT1999HS8-10#PBF draws less than 10µA in shutdown mode (VSHDN ≤ 0.5V). This value is specified across the full –40°C to +125°C temperature range and verified in Electrical Characteristics tables, supporting ultra-low-power standby in battery-backed systems.
How does the LT1999HS8-10#PBF handle reverse current flow?
The LT1999HS8-10#PBF provides true bidirectional output: positive VSENSE (V+IN > V–IN) produces VOUT > VREF; negative VSENSE produces VOUT < VREF. This polarity inversion enables unambiguous detection of charging vs. discharging current in battery systems without additional signal conditioning.
LT1999HS8-10#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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1999HS8-10#PBF FAQ
1.How can I place an order for LT1999HS8-10#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1999HS8-10#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 LT1999HS8-10#PBF reliable?
The price and inventory of LT1999HS8-10#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1999HS8-10#PBF is usually 5 days.
3.What payment methods are accepted for LT1999HS8-10#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1999HS8-10#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1999HS8-10#PBF?
LT1999HS8-10#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1999HS8-10#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 LT1999HS8-10#PBF?
For technical support, including LT1999HS8-10#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1999HS8-10#PBF requirements.
6.How does Aetrix verify that LT1999HS8-10#PBF is sourced from the original manufacturer or authorized distributors?
All LT1999HS8-10#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 LT1999HS8-10#PBF meets industry standards.
7.What is the process for return or replacement of LT1999HS8-10#PBF?
All LT1999HS8-10#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1999HS8-10#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 LT1999HS8-10#PBF part is unused and in its original packaging.
Return procedure for LT1999HS8-10#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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