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Analog Devices Inc. LT6376HDF#PBF
- Part No.:
- LT6376HDF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-WFDFN Exposed Pad, 12 Leads
- Datasheet:
-
LT6376HDF#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
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Product details
Overview
LT6376HDF#PBF from Analog Devices (formerly Linear Technology) is a precision gain-of-10 difference amplifier designed for high common-mode voltage sensing in industrial current monitoring and level translation. It delivers ±230V input common mode range, 90dB minimum CMRR, 0.0075% max gain error, 1ppm/°C gain drift, and rail-to-rail output swing across –40°C to 125°C. It enables bidirectional current sensing in high-voltage motor drives and battery management systems.
For engineers reviewing the LT6376HDF#PBF datasheet, LT6376HDF#PBF pinout, LT6376HDF#PBF application, or LT6376HDF#PBF equivalent, key selection criteria include its selectable resistor divider ratios (3.1/8.3/10.3), low 105nV/√Hz input-referred noise at ratio 3.1, ±230V CMV capability, shutdown current of 20µA (DFN only), and guaranteed H-grade temperature performance up to 125°C.
Technical Context
The LT6376HDF#PBF integrates a precision Over-The-Top® op amp with a laser-trimmed thin-film resistor network to achieve exceptional DC accuracy and robust high-CMV operation. Its internal architecture uses configurable reference pin connections (+REFA/–REFA, +REFB/–REFB, +REFC/–REFC) to select one of three resistor divider ratios-3.1, 8.3, or 10.3-directly determining input attenuation, bandwidth, noise, and common mode operating range.
At ratio 10.3, it supports ±230V CMV with 160kHz –3dB bandwidth and 245nV/√Hz noise; at ratio 3.1, bandwidth increases to 300kHz with 105nV/√Hz noise but limits CMV to ±28V. The exposed-pad DFN14 package (pin 15 = V–) provides low thermal resistance (θJA = 43°C/W) for stable operation under high-power dissipation conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10 V/V - enables direct scaling of differential input to 10× output without external gain-setting components. |
| Input CMV Range | ±230V at ratio 10.3 - allows direct sensing across high-side bus voltages in 400V+ systems without isolation. |
| CMRR | ≥90dB (min) - rejects >99.99% of common-mode interference in noisy industrial environments. |
| Gain Error | ±0.0075% (75ppm) max - ensures sub-0.1% absolute current measurement accuracy over temperature. |
| Gain Drift | ±1ppm/°C max - maintains calibration stability across automotive and industrial temperature extremes. |
| Supply Range | 3.3V to 50V - supports single-supply (3.3V/5V) and dual-supply (±15V/±25V) configurations in diverse power domains. |
| Shutdown Current | 20µA - enables ultra-low-power sleep mode in battery-backed or energy-harvesting applications (DFN only). |
Pinout & Package
LT6376HDF#PBF is housed in a 14-lead (4mm × 4mm) plastic DFN package with exposed thermal pad (pin 15 = V–). The package supports high-density PCB layouts and efficient heat dissipation (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Noninverting Input | Accepts input voltages from –230V to +230V; connects to high-side shunt or signal source. |
| –IN (Pin 14) | Inverting Input | Accepts complementary input in differential configuration; matched impedance to +IN for CMRR integrity. |
| +REFA / –REFA (Pins 3/12) | Reference A Terminals | Configure resistor divider ratio; open or grounded to set attenuation factor and CMV range. |
| +REFB / –REFB (Pins 4/11) | Reference B Terminals | Used with REFA/REFC to select ratio 8.3; determines internal feedback network topology. |
| +REFC / –REFC (Pins 5/10) | Reference C Terminals | Enable ratio 10.3 when all six REF pins tied appropriately; maximizes CMV at cost of bandwidth/noise. |
| REF (Pin 6) | Output Reference | Sets zero-differential-output voltage; used for level-shifting output into ADC or controller input range. |
| SHDN (Pin 7) | Shutdown Control | Active-low logic input (referred to V+); pulls ≥2.5V below V+ to enter 20µA shutdown state. |
| OUT (Pin 8) | Analog Output | Rail-to-rail output driving 5mA load; compatible with 12-bit+ SAR ADCs without external buffering. |
| V+ (Pin 9) | Positive Supply | Accepts 3.3V to 50V; powers internal op amp and resistor network. |
| V– (Pin 15, Exposed Pad) | Negative Supply | Must be soldered to PCB ground plane for thermal and electrical integrity; defines output swing lower bound. |
Key Features
| Feature | Design Value |
|---|---|
| Selectible Resistor Divider Ratios | Three user-configurable ratios (3.1/8.3/10.3) trade off CMV range vs. bandwidth/noise-enables optimal SNR in each application. |
| Over-The-Top® Input Protection | Internal op amp operates safely with inputs up to ±240V regardless of supply rails-eliminates need for external clamping in transient-prone systems. |
| Ultra-Low Gain Drift | 1ppm/°C max ensures <0.1% gain shift over full –40°C to 125°C range-critical for uncalibrated long-life field deployments. |
| Laser-Trimmed Thin-Film Resistors | Guarantees 75ppm max gain error and 2ppm max nonlinearity-supports 16-bit-equivalent precision in closed-loop control. |
| Low-Power Shutdown Mode | 20µA quiescent current in shutdown (DFN only)-extends battery life in portable test equipment and IoT edge sensors. |
Applications
| High-Side Current Sensing | Bidirectional Wide CMV Current Sensing |
|---|---|
Use Scenario: Monitoring phase current in 400V three-phase inverter legs using a 1mΩ shunt placed between DC+ and IGBT collector. IC Role / Device Role / Timing Role: Difference amplifier conditioning shunt voltage with ±230V common mode rejection before feeding to isolated ADC. Use Value: Enables direct high-side sensing without optocouplers or isolated power supplies-reducing BOM count and system latency by >2µs. | Use Scenario: Measuring charge/discharge current in 300V Li-ion battery packs with reversible polarity during regenerative braking. IC Role / Device Role / Timing Role: Precision bidirectional current monitor translating ±200mV shunt differential to ±2V output referenced to system ground. Use Value: Achieves <±0.2% full-scale error over temperature using ratio 10.3 configuration-meeting ASIL-B functional safety requirements. |
| High-Voltage to Low-Voltage Level Translation | Precision Difference Amplifier |
Use Scenario: Converting ±150V analog sensor output (e.g., piezoelectric pressure transducer) to 0–3.3V range for microcontroller ADC input. IC Role / Device Role / Timing Role: High-CMV attenuator and level shifter with REF pin biasing output to mid-supply for single-ended ADC interface. Use Value: Eliminates need for discrete resistor dividers and op-amp buffers-reducing offset drift accumulation and PCB area by 40%. | Use Scenario: Replacing legacy instrumentation amplifiers in strain-gauge bridge readout circuits requiring <100nV/√Hz noise and 100dB CMRR. IC Role / Device Role / Timing Role: Fixed-gain difference amplifier rejecting bridge excitation ripple and EMI while preserving µV-level differential signals. Use Value: Delivers 105nV/√Hz noise at ratio 3.1 and 300kHz bandwidth-enabling 22-bit effective resolution in static load cell applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Fixed gain (20V/V), lower CMV (±80V), no selectable ratio, AEC-Q100 qualified | Automotive motor control only; lacks ±230V capability and flexible ratio tuning | Choose for automotive-grade production where qualification outweighs CMV flexibility. |
| AD8479ARZ | Fixed gain (1V/V), higher CMV (±600V), higher noise (200nV/√Hz), no shutdown | Ultra-high-voltage isolation replacement; unsuitable for low-noise precision current sensing | Choose when CMV >±400V is required and 10× gain is not needed-e.g., HVDC monitoring. |
Compared with INA240A1QDRQ1 and AD8479ARZ, the LT6376HDF#PBF uniquely balances ±230V CMV, selectable gain-scaling topology, and 105nV/√Hz noise-making it optimal for industrial servo drives and energy storage systems demanding both wide dynamic range and high fidelity.
Availability
LT6376HDF#PBF is available at Aetrix Electronics and suitable for high-reliability industrial motor control, battery management systems, and precision test equipment requiring stable component supply across extended temperature ranges.
Supply support for LT6376HDF#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT6376HDF#PBF belongs to ADI's precision signal conditioning portfolio, engineered specifically for high-common-mode-voltage current sensing and level translation in harsh, high-accuracy applications.
FAQ
What is the maximum common mode voltage supported by the LT6376HDF#PBF?
The LT6376HDF#PBF supports up to ±230V input common mode voltage when configured with resistor divider ratio 10.3 and ±25V supplies. This rating is guaranteed over the full –40°C to 125°C operating range per the datasheet's H-grade specifications. Operation beyond ±230V risks exceeding absolute maximum ratings and invalidating performance guarantees.
How does the resistor divider ratio affect the LT6376HDF#PBF's bandwidth and noise performance?
The LT6376HDF#PBF's resistor divider ratio directly trades bandwidth against common mode range and noise. At ratio 3.1, it achieves 300kHz –3dB bandwidth and 105nV/√Hz input-referred noise; at ratio 10.3, bandwidth drops to 160kHz and noise rises to 245nV/√Hz. These values are measured and specified in the Electrical Characteristics table for the H-grade part.
Does the LT6376HDF#PBF require external resistors for gain setting?
No, the LT6376HDF#PBF has an internally laser-trimmed thin-film resistor network that fixes the gain at exactly 10 V/V. External resistors are not needed for gain configuration. Users only connect reference pins (+REFA/–REFA, etc.) to select one of three pre-defined internal divider ratios-no external passive components are required for basic operation.
What is the purpose of the SHDN pin on the LT6376HDF#PBF, and is it available in all packages?
The SHDN pin (Pin 7) enables low-power shutdown mode, reducing supply current to 20µA. It is present only in the DFN14 package (including LT6376HDF#PBF); the MSOP16 variant lacks this pin. Activation requires pulling SHDN ≥2.5V below V+, and the pin must not exceed V+ + 0.3V or V– – 0.3V per absolute maximum ratings.
Can the LT6376HDF#PBF operate from a single 5V supply?
Yes, the LT6376HDF#PBF supports single-supply operation from 3.3V to 50V total supply range. With 5V (V+ = 5V, V– = 0V), it maintains rail-to-rail output swing, ±200µV max input offset, and full functionality-including REF pin biasing and shutdown-provided the input common mode voltage stays within the valid range defined for that supply and ratio configuration.
LT6376HDF#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad, 12 Leads
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 4.1V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 300 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 350µA
- Current - Output / Channel:
- 28 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 50 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x4)
LT6376HDF#PBF FAQ
1.How can I place an order for LT6376HDF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6376HDF#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 LT6376HDF#PBF reliable?
The price and inventory of LT6376HDF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6376HDF#PBF is usually 5 days.
3.What payment methods are accepted for LT6376HDF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6376HDF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6376HDF#PBF?
LT6376HDF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6376HDF#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 LT6376HDF#PBF?
For technical support, including LT6376HDF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6376HDF#PBF requirements.
6.How does Aetrix verify that LT6376HDF#PBF is sourced from the original manufacturer or authorized distributors?
All LT6376HDF#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 LT6376HDF#PBF meets industry standards.
7.What is the process for return or replacement of LT6376HDF#PBF?
All LT6376HDF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6376HDF#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 LT6376HDF#PBF part is unused and in its original packaging.
Return procedure for LT6376HDF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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