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Analog Devices Inc. LT6375HDF#PBF
- Part No.:
- LT6375HDF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-WFDFN Exposed Pad, 12 Leads
- Datasheet:
-
LT6375HDF#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:773
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Product details
Overview
LT6375HDF#PBF from Analog Devices (formerly Linear Technology) is a precision unity-gain difference amplifier with ±270V input common mode voltage range, selectable internal resistor divider ratios (7/20/25), and rail-to-rail output. It integrates Over-The-Top® protected inputs, achieves 97dB minimum CMRR (A-grade), 0.0035% max gain error, and operates from –40°C to 125°C in DFN14 package. It is used for high-side/low-side bidirectional current sensing in industrial motor drives and HV battery monitoring.
For engineers reviewing the LT6375HDF#PBF datasheet, LT6375HDF#PBF pinout, LT6375HDF#PBF application, or LT6375HDF#PBF equivalent, key selection criteria include verified ±270V common mode tolerance, resistor-divider–dependent bandwidth (310–575kHz), shutdown current of 20µA (DFN only), and confirmed DFN14 thermal performance (θJA = 43°C/W).
Technical Context
The LT6375HDF#PBF implements a precision op amp core with thin-film matched resistor networks enabling selectable input attenuation. Its Over-The-Top® input architecture allows direct connection of +IN/–IN to voltages up to ±270V relative to V–, independent of supply rails.
Three resistor divider configurations (7, 20, 25) are selected via external connections to six reference pins (+REFA/–REFA, +REFB/–REFB, +REFC/–REFC), directly trading input common mode range against noise (250–599 nV/√Hz), offset drift (3–12 µV/°C), and –3dB bandwidth (310–575 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Common Mode Range | ±270V - enables direct sensing across high-voltage bus without external level-shifting or isolation |
| CMRR (min) | 97dB at DIV=25 - rejects >99.9% of common mode interference in noisy industrial environments |
| Gain Error (max) | 0.0035% (35 ppm) - ensures sub-0.1% full-scale error in precision current measurement systems |
| Supply Voltage Range | 3.3V to 50V - supports single-supply (5V) and dual-supply (±15V) operation in diverse power domains |
| Bandwidth (DIV=7) | 575 kHz - sufficient for fast transient detection in motor phase current feedback loops |
| Shutdown Current | 20 µA - enables low-power sleep mode in battery-backed or energy-conscious systems |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive and industrial control cabinet deployment |
Pinout & Package
LT6375HDF#PBF is housed in a 14-lead (4mm × 4mm) plastic DFN package with exposed thermal pad (Pin 15 = V–). The package supports high thermal efficiency (θJA = 43°C/W) and requires soldering of the exposed pad to PCB ground plane for optimal performance and reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Noninverting Input | Accepts input voltage up to ±270V relative to V–; connects to high-side shunt or HV signal source |
| –IN (Pin 14) | Inverting Input | Accepts input voltage up to ±270V relative to V–; completes differential pair with +IN |
| +REFA / –REFA (Pins 3, 12) | Reference A Terminal Pair | Configures resistor divider ratio when tied to appropriate bias; determines gain accuracy/noise trade-off |
| +REFB / –REFB (Pins 4, 11) | Reference B Terminal Pair | Used with REFA/REFC to select DIV=20 configuration; sets mid-range common mode capability |
| +REFC / –REFC (Pins 5, 10) | Reference C Terminal Pair | Enables DIV=25 for maximum ±270V common mode; increases noise but extends HV range |
| REF (Pin 6) | Output Reference | Sets zero-differential output voltage; allows level-shifting to match ADC input range |
| SHDN (Pin 7) | Shutdown Control | Active-low logic input; pulls >2.5V below V+ to enter 20µA shutdown state (DFN-only feature) |
| V+ (Pin 9) | Positive Supply | Connects to main positive rail (up to +50V); powers internal op amp and resistor network |
| V– (Pin 8 & Exposed Pad 15) | Negative Supply | Connects to system ground or negative rail; exposed pad must be soldered for thermal management |
| OUT (Pin 8) | Analog Output | Rail-to-rail output driving ADC or controller; delivers ±10mV/mA scaled current sense signal |
Key Features
| Feature | Design Value |
|---|---|
| Selectably Configured Resistor Divider | Three discrete ratios (7/20/25) let designers optimize SNR, bandwidth, and DC precision for exact common mode requirements |
| Over-The-Top® Input Protection | Allows +IN/–IN to operate at ±270V regardless of V+/V– supply levels-eliminates need for external clamping or isolation |
| High-Temperature Performance | Specified over –40°C to 125°C with guaranteed gain error drift ≤1 ppm/°C-supports engine bay or factory-floor deployments |
| Low-Power Shutdown Mode | 20 µA quiescent current in shutdown (DFN only)-enables energy-efficient wake-on-event architectures |
| Matched Thin-Film Resistor Network | Ensures <2 ppm gain nonlinearity and <300 µV offset (A-grade)-critical for closed-loop current regulation accuracy |
Applications
| Motor Phase Current Sensing | Battery Pack Cell Monitoring |
|---|---|
Use Scenario: Real-time measurement of three-phase motor winding currents in variable-frequency drives operating at 400–800V DC bus. IC Role / Device Role / Timing Role: High-side difference amplifier conditioning shunt voltage with ±270V common mode rejection before ADC sampling. Use Value: Enables accurate torque control and overcurrent protection without optocouplers or isolated amplifiers-reducing BOM cost and board area by 30%. | Use Scenario: Monitoring individual cell voltages in 48–800V lithium-ion battery packs for EVs and energy storage systems. IC Role / Device Role / Timing Role: Bidirectional current monitor measuring charge/discharge current through series-connected cells using high-side shunts. Use Value: Achieves <0.1% full-scale gain error across temperature-improving state-of-charge estimation accuracy by ≥1.5% over lifetime. |
| Industrial PLC Analog Input Module | High-Voltage Power Supply Feedback |
Use Scenario: Signal conditioning for universal analog inputs (0–10V, ±10V, 4–20mA) in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Precision difference amplifier front-end accepting wide common mode signals while rejecting ground loop noise. Use Value: Delivers 97dB CMRR at 50/60Hz-suppressing line-frequency interference that would otherwise corrupt 16-bit ADC readings. | Use Scenario: Isolation-free feedback path for 300–600V switch-mode power supplies in telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Level-translating difference amplifier converting high-voltage output sense to low-voltage control IC input. Use Value: Replaces expensive isolated error amplifiers-cutting feedback loop latency by 2× and improving transient response by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDGSRQ1 | Fixed 20V/V gain, ±80V common mode, no resistor divider selection, AEC-Q100 qualified | Automotive-grade current sensing only; lacks ±270V capability and configurability | Choose for automotive ASIL-B systems where qualification outweighs HV range needs |
| AD8479ARZ | Fixed 1V/V gain, ±600V common mode, no shutdown, SOIC-8 package, higher offset drift (5 µV/°C) | Ultra-high common mode but lower precision; no low-power mode or DFN thermal advantage | Choose when absolute maximum common mode (>±270V) is mandatory and 125°C operation is not required |
Compared with INA240A1QDGSRQ1 and AD8479ARZ, the LT6375HDF#PBF uniquely balances ±270V operation, selectable precision, 125°C rating, and 20µA shutdown-making it optimal for industrial HV monitoring where configurability and thermal robustness are critical.
Availability
LT6375HDF#PBF is available at Aetrix Electronics and suitable for industrial motor drives, battery management systems, and PLC analog input modules requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for LT6375HDF#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT6375 product line was designed specifically for precision high-common-mode-voltage signal conditioning in industrial, energy, and transportation systems-emphasizing configurability, thermal resilience, and DC accuracy over wide temperature ranges.
FAQ
What is the maximum common mode voltage supported by the LT6375HDF#PBF?
The LT6375HDF#PBF supports a maximum input common mode voltage of ±270V, verified per Absolute Maximum Ratings and tested at VS = ±15V with resistor divider ratio = 25. This rating applies to both +IN and –IN pins referenced to V–, enabled by its Over-The-Top® input architecture and internal resistor network.
How does the resistor divider ratio affect bandwidth and noise in the LT6375HDF#PBF?
The LT6375HDF#PBF offers three selectable resistor divider ratios (7, 20, 25) via reference pin configuration. At DIV=7, bandwidth is 575 kHz and output noise is 250 nV/√Hz; at DIV=25, bandwidth drops to 310 kHz and noise rises to 599 nV/√Hz. These trade-offs are documented in Electrical Characteristics tables for both DFN and MSOP packages.
Does the LT6375HDF#PBF support shutdown mode, and what is its current draw?
Yes, the LT6375HDF#PBF supports shutdown mode via the SHDN pin (Pin 7), which is available only in the DFN14 package. When SHDN is pulled >2.5V below V+, the device enters shutdown with typical supply current of 20 µA, as specified in the Electrical Characteristics table for H-grade DFN devices at TA = 125°C.
What is the guaranteed gain error specification for the LT6375HDF#PBF over temperature?
The LT6375HDF#PBF guarantees a maximum gain error of ±0.006% (60 ppm) over the full –40°C to 125°C operating range, per the "LT6375" column in the Electrical Characteristics table. The tighter ±0.0035% (35 ppm) spec applies only to the LT6375A variant, not the standard H-grade part.
Which package types and temperature grades are offered for the LT6375HDF#PBF?
The LT6375HDF#PBF is exclusively available in the 14-lead (4mm × 4mm) plastic DFN package with exposed thermal pad (Pin 15 = V–), rated for operation from –40°C to 125°C. It is distinct from MSOP variants (e.g., LT6375HMS#PBF) and I-grade or A-grade DFN versions (LT6375IDF#PBF, LT6375AHDF#PBF).
LT6375HDF#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:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.4V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 575 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 120 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)
LT6375HDF#PBF FAQ
1.How can I place an order for LT6375HDF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6375HDF#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 LT6375HDF#PBF reliable?
The price and inventory of LT6375HDF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6375HDF#PBF is usually 5 days.
3.What payment methods are accepted for LT6375HDF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6375HDF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6375HDF#PBF?
LT6375HDF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6375HDF#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 LT6375HDF#PBF?
For technical support, including LT6375HDF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6375HDF#PBF requirements.
6.How does Aetrix verify that LT6375HDF#PBF is sourced from the original manufacturer or authorized distributors?
All LT6375HDF#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 LT6375HDF#PBF meets industry standards.
7.What is the process for return or replacement of LT6375HDF#PBF?
All LT6375HDF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6375HDF#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 LT6375HDF#PBF part is unused and in its original packaging.
Return procedure for LT6375HDF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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