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Analog Devices Inc. LT6375IMS#PBF
- Part No.:
- LT6375IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads
- Datasheet:
-
LT6375IMS#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:716
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Product details
Overview
LT6375IMS#PBF from Analog Devices (formerly Linear Technology) is a unity-gain, ±270V common mode voltage difference amplifier in a 16-lead MSOP package, featuring 97dB minimum CMRR (A-grade), 0.0035% max gain error, 1ppm/°C gain drift, and selectable internal resistor divider ratios (7/20/25) for optimized SNR and bandwidth in high-voltage current sensing applications.
For engineers reviewing the LT6375IMS#PBF datasheet, LT6375IMS#PBF pinout, LT6375IMS#PBF application, or LT6375IMS#PBF equivalent, this device supports precision bidirectional current monitoring in industrial power supplies, motor drives, and battery management systems where wide input common mode range, rail-to-rail output, and low power shutdown (20µA) are critical design requirements.
Technical Context
The LT6375IMS#PBF integrates an Over-The-Top® protected precision op amp with a highly matched thin-film resistor network to achieve ±270V input common mode range while maintaining DC precision. Its core architecture uses three pairs of reference pins (+REFA/–REFA, +REFB/–REFB, +REFC/–REFC) to configure one of three internal resistor divider ratios-7, 20, or 25-directly affecting bandwidth (575kHz/375kHz/310kHz), noise density (250/508/599nV/√Hz), and offset voltage (300/700/2500µV).
Unlike fixed-ratio difference amplifiers, the LT6375IMS#PBF enables system-level optimization: lower DIV ratios improve AC performance and DC accuracy but reduce maximum input common mode voltage, while higher DIV ratios extend common mode range at the cost of increased noise and reduced bandwidth-making it uniquely suited for adaptive front-end signal conditioning in variable-voltage industrial sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common Mode Range | ±270V - Enables direct sensing across high-side shunts in 400V+ bus systems without external level-shifting or isolation. |
| CMRR (min) | 97dB (LT6375A grade) - Rejects >99.9% of common mode interference in noisy industrial environments. |
| Gain Error (max) | 0.0035% (35ppm) - Ensures sub-0.1% full-scale error in precision current measurement over temperature. |
| Supply Voltage Range | 3.3V to 50V - Supports single-supply (5V) and dual-supply (±15V) operation across diverse power domains. |
| Bandwidth (DIV=7) | 575kHz - Sufficient for fast transient detection in motor phase current monitoring and switching power supply feedback. |
| Shutdown Current | 20µA (MSOP variant) - Enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Rail-to-Rail Output | Yes - Maximizes dynamic range into ADCs or downstream comparators without level translation. |
Pinout & Package
LT6375IMS#PBF is housed in a 16-lead plastic MSOP (MS16) package with exposed pad not connected internally; pin 8 is V–, pin 9 is V+, and pin 16 is –IN. The package measures 4.0mm × 3.0mm × 0.85mm and features 130°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Noninverting Input | Accepts voltages from –270V to +270V; connects directly to high-side shunt terminal in current sensing. |
| –IN (Pin 16) | Inverting Input | Accepts voltages from –270V to +270V; connects to low-side shunt terminal or ground-referenced node. |
| +REFA / –REFA (Pins 3/14) | Reference A Pair | Configures resistor divider ratio when used with REFB/REFC; sets input common mode range and noise profile. |
| +REFB / –REFB (Pins 5/12) | Reference B Pair | Used with REFA/REFC to select DIV=20; enables extended common mode range up to ±270V with trade-off in bandwidth. |
| +REFC / –REFC (Pins 6/11) | Reference C Pair | Used with REFA/REFB to select DIV=25; provides widest common mode range but highest noise and lowest bandwidth. |
| REF (Pin 7) | Output Reference | Sets zero-differential output voltage; allows level-shifting output to match ADC input range (e.g., 2.5V mid-scale). |
| V+ (Pin 9) | Positive Supply | Accepts 3.3V to 50V; powers internal op amp and resistor network; must be ≥1.75V above VCMOP for valid operation. |
| V– (Pin 8) | Negative Supply | Connects to system ground or negative rail; exposed pad (Pin 15) is electrically tied to V– and must be soldered to PCB for thermal performance. |
| OUT (Pin 10) | Amplified Output | Rail-to-rail output driving loads down to 2kΩ; delivers VOUT = (V+IN – V–IN) + VREF with unity gain and <2ppm nonlinearity. |
Key Features
| Feature | Design Value |
|---|---|
| Selectably Configurable Resistor Divider Ratio | Three hardware-selectable ratios (7/20/25) via REF pin connections enable optimization of common mode range vs. noise/bandwidth trade-offs per application. |
| Over-The-Top® Input Protection | Internal op amp withstands ±270V on +IN/–IN regardless of supply rails-eliminates need for external clamping diodes or Zeners in high-voltage transients. |
| Low Drift Precision Performance | 1ppm/°C gain drift and 3µV/°C offset drift ensure stable calibration over –40°C to 85°C operating range without active compensation. |
| Integrated Thin-Film Resistor Network | Monolithic matching achieves <2ppm gain nonlinearity and <0.0035% gain error-critical for metrology-grade current measurement. |
| Low-Power Shutdown Mode | 20µA quiescent current in shutdown (I-grade MSOP) enables energy-efficient wake-on-event architectures in portable or remote sensor nodes. |
Applications
| High-Side Bidirectional Current Sensing | Industrial Data-Acquisition Front-End |
|---|---|
Use Scenario: Monitoring charge/discharge current in 48V battery storage systems with shunt placed between battery positive and load. IC Role / Device Role / Timing Role: Difference amplifier measuring differential voltage across shunt while rejecting 48V common mode and delivering rail-to-rail output to 16-bit SAR ADC. Use Value: ±270V common mode range accommodates bus transients; 97dB CMRR prevents noise coupling from switching converters; 0.0035% gain error ensures <0.1% full-scale accuracy over temperature. | Use Scenario: Signal conditioning front-end for PLC analog input modules measuring 4–20mA loop currents and voltage signals in factory automation. IC Role / Device Role / Timing Role: Precision unity-gain amplifier isolating field sensor signals from noisy plant-floor common mode noise before digitization. Use Value: Selectable DIV=20 configuration supports ±200V common mode range typical in industrial I/O; 350µA supply current enables dense channel count without thermal derating. |
| High-Voltage to Low-Voltage Level Translation | Replacement for Isolation Circuits |
Use Scenario: Converting ±150V motor phase voltage feedback to 0–5V range compatible with microcontroller ADC inputs in servo drive control loops. IC Role / Device Role / Timing Role: Wide common mode difference amplifier translating high-voltage analog feedback while preserving signal integrity and timing fidelity. Use Value: 575kHz bandwidth (DIV=7) supports real-time current loop response; REF pin allows precise 2.5V centering for bipolar ADC input ranges. | Use Scenario: Eliminating optocouplers or isolated amplifiers in DC-DC converter feedback paths where galvanic isolation is unnecessary but high common mode rejection is required. IC Role / Device Role / Timing Role: Direct-coupled difference amplifier rejecting switching noise on primary-side sense resistors while delivering accurate secondary-side voltage feedback. Use Value: 100dB PSRR at 100kHz suppresses PWM noise; ±270V range covers worst-case flyback spikes; eliminates isolation component cost, size, and latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8479ARZ | Fixed 20× gain, ±600V common mode, no selectable divider; higher gain error (0.02%), lower bandwidth (125kHz). | Best for fixed-gain, ultra-high common mode (>±500V) applications where programmability is not needed. | Choose AD8479ARZ only when ±600V rating is mandatory and gain flexibility is unnecessary-LT6375IMS#PBF offers superior DC precision and bandwidth at ±270V. |
| INA240A1QPWRQ1 | Current-sense amplifier (not difference amp), integrated 20V/V gain, ±80V common mode, automotive AEC-Q100 qualified. | Targeted for automotive battery monitoring; lacks configurable common mode range and REF pin level-shifting capability. | Choose INA240A1QPWRQ1 only for AEC-Q100-compliant automotive designs requiring integrated gain and fault reporting-LT6375IMS#PBF provides broader industrial voltage range and design flexibility. |
Compared with AD8479ARZ and INA240A1QPWRQ1, the LT6375IMS#PBF uniquely combines user-selectable common mode range, unity gain, and metrology-grade DC specs-making it optimal for programmable industrial current monitors where precision, adaptability, and wide voltage tolerance are jointly required.
Availability
LT6375IMS#PBF is available at Aetrix Electronics and suitable for industrial motor drives, battery management systems, and programmable logic controller (PLC) analog input modules requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to 85°C.
Supply support for LT6375IMS#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 LT6375IMS#PBF belongs to ADI's precision signal conditioning portfolio, designed specifically for high-voltage, high-accuracy current and voltage sensing in harsh industrial environments where traditional op amps fail due to limited input voltage range or poor CMRR.
FAQ
What is the maximum common mode voltage supported by the LT6375IMS#PBF?
The LT6375IMS#PBF supports a maximum input common mode voltage of ±270V when configured with resistor divider ratio = 25 (all REF pins connected appropriately). This rating is validated per Absolute Maximum Ratings and confirmed in Electrical Characteristics tables for both MSOP and DFN packages under VS = ±15V conditions.
Does the LT6375IMS#PBF require external resistors for gain setting?
No, the LT6375IMS#PBF does not require external resistors for gain setting-it integrates a precision thin-film resistor network with three selectable internal divider ratios (7, 20, 25) configured solely by connecting its +REFA/–REFA, +REFB/–REFB, and +REFC/–REFC pins to appropriate supply or ground references as specified in the Applications Information section of the LT6375IMS#PBF datasheet.
What is the purpose of the REF pin on the LT6375IMS#PBF?
The REF pin on the LT6375IMS#PBF sets the output voltage when the differential input voltage is zero (VOUT = VREF). It enables level-shifting of the output to match downstream ADC reference points-for example, tying REF to 2.5V centers a ±100mV differential input around 2.5V for optimal 12-bit ADC utilization-without requiring external summing circuitry.
Is shutdown functionality available on the LT6375IMS#PBF in MSOP package?
Yes, shutdown functionality is available on the LT6375IMS#PBF in MSOP package: the SHDN pin (Pin 7) is present and functional, enabling reduction of supply current from 350µA to 20µA when pulled >2.5V below V+. This feature is explicitly documented in the Electrical Characteristics table for LT6375IMS#PBF under "IS - Supply Current" and "ISHDN - SHDN Pin Current" parameters.
How does resistor divider ratio selection affect bandwidth and noise in the LT6375IMS#PBF?
Resistor divider ratio selection directly trades off bandwidth and noise in the LT6375IMS#PBF: at DIV=7, bandwidth is 575kHz and output noise density is 250nV/√Hz; at DIV=20, bandwidth drops to 375kHz and noise rises to 508nV/√Hz; at DIV=25, bandwidth falls to 310kHz and noise reaches 599nV/√Hz. These values are measured and specified in the Electrical Characteristics tables for LT6375IMS#PBF across temperature and supply conditions.
LT6375IMS#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:
- 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP
LT6375IMS#PBF FAQ
1.How can I place an order for LT6375IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6375IMS#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 LT6375IMS#PBF reliable?
The price and inventory of LT6375IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6375IMS#PBF is usually 5 days.
3.What payment methods are accepted for LT6375IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6375IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6375IMS#PBF?
LT6375IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6375IMS#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 LT6375IMS#PBF?
For technical support, including LT6375IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6375IMS#PBF requirements.
6.How does Aetrix verify that LT6375IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LT6375IMS#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 LT6375IMS#PBF meets industry standards.
7.What is the process for return or replacement of LT6375IMS#PBF?
All LT6375IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6375IMS#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 LT6375IMS#PBF part is unused and in its original packaging.
Return procedure for LT6375IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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