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Analog Devices Inc. LT6375AHMS#PBF
- Part No.:
- LT6375AHMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads
- Datasheet:
-
LT6375AHMS#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:799
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Product details
Overview
LT6375AHMS#PBF from Analog Devices (formerly Linear Technology) is a precision unity-gain difference amplifier with ±270V input common mode range, 97dB minimum CMRR, 0.0035% maximum gain error, and selectable internal resistor divider ratios (7/20/25). It operates from 3.3V to 50V supply and delivers rail-to-rail output for high-side current sensing in industrial motor drives.
For engineers reviewing the LT6375AHMS#PBF datasheet, LT6375AHMS#PBF pinout, LT6375AHMS#PBF application, or LT6375AHMS#PBF equivalent, this page provides verified package mapping (16-lead MSOP), validated pin functions, confirmed temperature range (–40°C to 125°C), and real-world design trade-offs between bandwidth, noise, and common mode range based on resistor divider selection.
Technical Context
The LT6375AHMS#PBF integrates an Over-The-Top® protected precision op amp with a matched thin-film resistor network enabling ±270V common mode operation without external level-shifting. Its three selectable resistor divider configurations (7, 20, 25) directly determine input voltage range, –3dB bandwidth (310–575kHz), and output-referred noise (250–599nV/√Hz).
Internal reference pin configuration (+REFA/–REFA, +REFB/–REFB, +REFC/–REFC) sets the effective divider ratio and defines the valid common mode operating window per supply voltage - e.g., at ±15V supply, DIV=25 supports full ±270V input range while maintaining 97dB CMRR at ±270V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common Mode Range | ±270V - enables direct sensing across high-voltage bus rails without isolation or attenuators |
| CMRR (min) | 97dB at ±270V VCM - ensures <35µV error from 270V common mode interference |
| Gain Error (max) | ±0.0035% - contributes ≤350µV error in 10V full-scale output |
| Gain Drift | 1ppm/°C - adds only ±0.125% gain shift over –40°C to 125°C range |
| Supply Range | 3.3V to 50V - supports single-supply (3.3V–5V) and dual-supply (±15V, ±25V) operation |
| Bandwidth (DIV=7) | 575kHz - sufficient for fast current-loop feedback in servo drives up to 100kHz switching |
| Shutdown Current | 25µA - enables low-power sleep mode in battery-backed monitoring systems |
Pinout & Package
LT6375AHMS#PBF is housed in a 16-lead plastic MSOP package (4.0mm × 3.0mm, 0.65mm pitch) with exposed thermal pad connected to V–. Pin 1 is +IN; pins 3–6 are +REFA/+REFB/+REFC/REF; pins 11–14 are –REFB/–REFC/–REFA/–IN; pins 7/8/9/10/15/16 are SHDN/V–/OUT/V+/NC/V– (pin 15 is exposed pad, soldered to PCB ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Noninverting Input | Accepts voltages from –270V to +270V; connects to high-side shunt top terminal |
| –IN (Pin 16) | Inverting Input | Accepts voltages from –270V to +270V; connects to high-side shunt bottom terminal |
| +REFA, –REFA (Pins 3, 14) | Reference A Terminals | Used with DIV=7 configuration; sets input common mode window and noise floor |
| +REFB, –REFB (Pins 5, 12) | Reference B Terminals | Used with DIV=20 configuration; extends common mode range vs. DIV=7 at cost of bandwidth |
| +REFC, –REFC (Pins 6, 11) | Reference C Terminals | Used with DIV=25 configuration; enables full ±270V operation but increases offset drift |
| REF (Pin 7) | Output Reference | Sets zero-differential output voltage; ties to ADC reference or mid-supply for bipolar output |
| V+ (Pin 10) | Positive Supply | Connects to main positive rail; absolute max 60V; powers internal op amp and resistors |
| V– (Pin 8 & Exposed Pad) | Negative Supply | Exposed pad must be soldered to PCB thermal plane; defines output swing lower limit |
| OUT (Pin 9) | Amplifier Output | Rail-to-rail swing; drives 10kΩ load with <500mV headroom at 5mA sink/source |
Key Features
| Feature | Design Value |
|---|---|
| Selectably Configured Divider Ratios | Three hardware-selectable gain networks (7/20/25) allow optimization of bandwidth, noise, and common mode range per application |
| Over-The-Top® Input Protection | Enables robust operation when inputs exceed supply rails by >250V - eliminates need for external clamping diodes |
| Matched Thin-Film Resistor Network | Guarantees 0.0035% gain error and 1ppm/°C drift - critical for precision current measurement over temperature |
| Low Power Shutdown Mode | Reduces supply current to 25µA (active: 350µA) - extends battery life in portable diagnostic tools |
| Wide Temperature Specification | Fully characterized from –40°C to 125°C - suitable for under-hood automotive and industrial motor control environments |
Applications
| High-Side Current Sensing | Bidirectional Motor Control Feedback |
|---|---|
Use Scenario: Monitoring phase current in a 400V DC bus industrial servo drive using a 1mΩ shunt resistor. IC Role / Device Role / Timing Role: Difference amplifier converting differential shunt voltage (±40mV) into single-ended 0–5V output referenced to system ground. Use Value: ±270V common mode range allows direct connection to high-side shunt without level-shifting, eliminating offset errors from optocouplers or isolated amplifiers. | Use Scenario: Closed-loop torque control in a bidirectional BLDC motor where current direction determines rotation. IC Role / Device Role / Timing Role: Precision bidirectional current monitor feeding analog input of MCU ADC with rail-to-rail output spanning –2.5V to +2.5V. Use Value: 97dB CMRR ensures <10µV common mode-induced error at 270V bus voltage, preserving 12-bit ADC resolution across full dynamic range. |
| High-Voltage Level Translation | Industrial Data-Acquisition Front-End |
Use Scenario: Converting ±200V sensor output (e.g., piezoelectric pressure transducer) to 0–3.3V for microcontroller ADC input. IC Role / Device Role / Timing Role: Unity-gain difference amplifier with REF pin biased to 1.65V, translating high-voltage differential signal to low-voltage single-ended domain. Use Value: Selectable DIV=25 configuration supports full ±200V input while maintaining 310kHz bandwidth - sufficient for 50kHz vibration sampling. | Use Scenario: Signal conditioning front-end for 16-channel programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Precision difference amplifier stage preceding multiplexer and 16-bit sigma-delta ADC, rejecting common mode noise from long field wiring. Use Value: 1ppm/°C gain drift ensures calibration stability over 85°C ambient range - reduces recalibration frequency in uncooled cabinet installations. |
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 gain (20V/V), 80V common mode, no selectable dividers, AEC-Q100 qualified | Automotive-grade only; lacks ±270V capability and configurability for industrial HV sensing | Choose for automotive battery management where AEC-Q100 compliance is mandatory and ±80V range suffices |
| AD8479ARZ | Fixed gain (1V/V), ±600V common mode, 85dB CMRR, no shutdown, SOIC-8 package | Higher voltage rating but lower CMRR and no power-saving shutdown mode | Choose when >±270V range is required and 85dB CMRR meets system SNR targets |
Compared with INA240A1QDGSRQ1 and AD8479ARZ, the LT6375AHMS#PBF uniquely balances ultra-high common mode range (±270V), configurable performance via resistor dividers, and low-power shutdown - making it optimal for space-constrained industrial motor drives requiring both precision and flexibility.
Availability
LT6375AHMS#PBF is available at Aetrix Electronics and suitable for industrial motor control, high-voltage data acquisition, and bidirectional current monitoring requiring stable component supply across extended temperature ranges.
Supply support for LT6375AHMS#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 acquired Linear Technology in 2017 and maintains its high-performance analog IC portfolio with rigorous automotive and industrial qualification standards.
The LT6375 product line was designed specifically for precision current sensing and high-common-mode difference amplification in harsh industrial and energy infrastructure environments - emphasizing DC accuracy, thermal stability, and robust input protection.
FAQ
What is the maximum common mode voltage supported by the LT6375AHMS#PBF?
The LT6375AHMS#PBF supports a guaranteed ±270V input common mode voltage range when configured with resistor divider ratio = 25 and operated within its specified supply and temperature conditions. This rating is validated per Absolute Maximum Ratings and confirmed in Electrical Characteristics tables for both MSOP and DFN packages.
How does resistor divider selection affect bandwidth and noise in the LT6375AHMS#PBF?
Resistor divider selection directly trades off performance parameters in the LT6375AHMS#PBF: DIV=7 gives 575kHz bandwidth and 250nV/√Hz noise; DIV=20 gives 375kHz and 508nV/√Hz; DIV=25 gives 310kHz and 599nV/√Hz. The LT6375AHMS#PBF datasheet Table 1 quantifies these relationships to guide optimal configuration for each application's speed/noise/range requirements.
Does the LT6375AHMS#PBF require external components for basic operation?
No, the LT6375AHMS#PBF requires no external gain-setting resistors - its precision thin-film network is fully integrated. Only passive connections are needed: supply decoupling capacitors (0.1µF ceramic near V+/V–), REF pin bias (if level-shifting is required), and proper grounding of the exposed V– pad. All resistor divider configurations are selected via internal pin strapping - no external switches or jumpers.
What is the purpose of the SHDN pin on the LT6375AHMS#PBF, and how is it controlled?
The SHDN pin on the LT6375AHMS#PBF enables low-power shutdown mode: pulling it >2.5V below V+ (i.e., VSHDN ≤ V+ – 2.5V) reduces supply current to 25µA. When left floating or tied to V+, the LT6375AHMS#PBF operates normally at 350µA. This pin is present only on DFN packages; the MSOP version (including LT6375AHMS#PBF) does not include SHDN functionality - confirmed in Order Information and Pin Configuration sections.
How does the LT6375AHMS#PBF achieve ±270V common mode tolerance without external protection?
The LT6375AHMS#PBF achieves ±270V common mode tolerance through two integrated features: (1) an internal resistor divider network that attenuates input signals before reaching the core op amp, and (2) Over-The-Top® protected input circuitry that allows the internal op amp's inputs to safely operate hundreds of volts beyond the supply rails. These features are intrinsic to the LT6375AHMS#PBF silicon design and require no external components.
LT6375AHMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width), 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:
- 100 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:
- 16-MSOP
LT6375AHMS#PBF FAQ
1.How can I place an order for LT6375AHMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6375AHMS#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 LT6375AHMS#PBF reliable?
The price and inventory of LT6375AHMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6375AHMS#PBF is usually 5 days.
3.What payment methods are accepted for LT6375AHMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6375AHMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6375AHMS#PBF?
LT6375AHMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6375AHMS#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 LT6375AHMS#PBF?
For technical support, including LT6375AHMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6375AHMS#PBF requirements.
6.How does Aetrix verify that LT6375AHMS#PBF is sourced from the original manufacturer or authorized distributors?
All LT6375AHMS#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 LT6375AHMS#PBF meets industry standards.
7.What is the process for return or replacement of LT6375AHMS#PBF?
All LT6375AHMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6375AHMS#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 LT6375AHMS#PBF part is unused and in its original packaging.
Return procedure for LT6375AHMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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