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Analog Devices Inc. LT6370HDD#TRPBF
- Part No.:
- LT6370HDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT6370HDD#TRPBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LT6370HDD#TRPBF from Analog Devices is a high-precision, gain-programmable instrumentation amplifier in a 10-pin 3mm × 3mm DFN package (H-grade, –40°C to 125°C), delivering 25µV max input offset voltage, 0.3µV/°C max drift, 94dB min DC CMRR at G=1, 3.1MHz bandwidth, and integrated RFI filtering - used for precision bridge and thermocouple signal conditioning in industrial sensor interfaces.
For engineers reviewing the LT6370HDD#TRPBF datasheet, LT6370HDD#TRPBF pinout, LT6370HDD#TRPBF application, or LT6370HDD#TRPBF equivalent, this page provides verified DC precision specs, thermal stability data, gain configuration guidance, and real-world transducer interface use cases - critical for low-drift, high-CMRR analog front-end design in harsh EMI environments.
Technical Context
The LT6370HDD#TRPBF implements an enhanced three-op-amp topology with laser-trimmed 12.1kΩ internal resistors and proprietary bipolar process transistors (Q1/Q2) enabling ultra-low drift and matched gain-setting accuracy. Its gain equation G = 1 + 24.2kΩ/RG supports programmability from 1 to >1000 using a single external resistor.
It integrates on-chip EMI filters on both inputs, guarantees input offset drift ≤0.4µV/°C over –40°C to 125°C (DD package), and maintains ≥112dB CMRR up to 100kHz via trimmed feedback networks (R5–R8) - ensuring stable performance in multiplexed, high-noise industrial acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 25µV max (S8E/MS8); 100µV max for DD package at –40°C to 125°C - enables direct measurement of sub-mV sensor outputs without calibration drift. |
| Offset Drift | 0.4µV/°C max (DD, –40°C to 125°C) - ensures <±0.5µV total drift across full operating range, critical for unattended long-term monitoring. |
| CMRR | 94dB min (G=1, DC–60Hz), 77dB at 20kHz (DD) - rejects common-mode noise from motor drives or switching supplies in industrial settings. |
| Bandwidth | 3.1MHz at G=1, 184kHz at G=100 - supports fast settling (<16µs to 0.0015%) for multiplexed multi-channel DAQ systems. |
| Noise Density | 7nV/√Hz at 1kHz, 0.2µVP-P (0.1–10Hz) - preserves SNR in low-level strain gauge and thermocouple amplification. |
| Supply Range | ±2.375V to ±17.5V (4.75V–35V total) - compatible with standard industrial ±15V rails and low-voltage battery-powered sensors. |
| Package | 10-pin 3mm × 3mm DFN (exposed pad connected to V–) - offers 43°C/W θJA for thermal reliability in compact enclosures. |
Pinout & Package
LT6370HDD#TRPBF uses a 10-pin 3mm × 3mm plastic DFN package with exposed thermal pad (Pin 11) internally connected to V– (Pin 5). The package supports high-density PCB layouts and efficient heat dissipation (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +RG (Pin 1) | Positive gain-set resistor terminal | Connects to one end of external RG; forms transconductance path defining G = 1 + 24.2kΩ/RG. |
| NC (Pin 2) | No internal connection | Must be left floating or grounded per layout best practices; no electrical function. |
| V+ (Pin 3) | Positive power supply | Accepts 4.75V–35V total supply; requires local 0.1µF ceramic bypass to ground. |
| OUTPUT (Pin 4) | Differential-to-single-ended output | Delivers amplified, referenced output; drives 2kΩ load with ±14.3V swing (±15V supply). |
| REF (Pin 5) | Output reference voltage node | Sets output common-mode level; accepts V– to V+ range; 20kΩ input resistance. |
| –RG (Pin 6) | Negative gain-set resistor terminal | Completes RG connection; current through RG sets preamp transconductance and bandwidth. |
| NC (Pin 7) | No internal connection | Unused pin; no routing required. |
| –IN (Pin 8) | Inverting input terminal | High-impedance (>225GΩ) differential input; accepts V– + 1.8V to V+ – 1.4V common-mode range. |
| +IN (Pin 9) | Non-inverting input terminal | High-impedance input paired with –IN; matched bias current (≤0.4nA max) minimizes offset error. |
| V– (Pin 10) | Negative power supply | Return path for supply and exposed pad; requires local 0.1µF ceramic bypass to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables 0.01% max gain error at G=1 and guaranteed 30ppm/°C gain drift - eliminates need for external calibration resistors. |
| Integrated RFI filter | Rejects >100dB of RF interference up to 1GHz on both inputs - prevents demodulation errors in noisy factory environments. |
| Low 1/f noise corner | 1Hz corner frequency with 0.2µVP-P (0.1–10Hz) - ensures stable baseline for slow-varying temperature and pressure signals. |
| Self-adjusting bandwidth | Bandwidth scales with gain (3.1MHz @ G=1 → 19kHz @ G=1000) - maintains constant gain-bandwidth product without external compensation. |
| H-grade temperature rating | Specified from –40°C to 125°C with validated 0.4µV/°C offset drift - suitable for under-hood automotive and industrial control applications. |
Applications
| Bridge Amplifier | Data Acquisition |
|---|---|
Use Scenario: Amplifying mV-level differential output from a 350Ω Wheatstone bridge in load cell or pressure sensor. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing gain, common-mode rejection, and RFI immunity before ADC sampling. Use Value: 25µV offset and 94dB CMRR enable resolution of <0.01% full-scale bridge imbalance without software correction. | Use Scenario: Front-end signal conditioning in modular 16-bit DAQ systems with channel multiplexing. IC Role / Device Role / Timing Role: High-speed, low-drift gain stage with 5.8µs settling (0.0015%) at G=1 for rapid channel switching. Use Value: 3.1MHz bandwidth and integrated EMI filtering allow reliable operation in electrically noisy PLC cabinets. |
| Thermocouple Amplifier | Strain Gauge Amplifier |
Use Scenario: Cold-junction-compensated K-type thermocouple interface with linearization in firmware. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier converting µV/°C thermocouple output to 0–5V range for microcontroller ADC. Use Value: 0.4µV/°C offset drift ensures <±0.5°C error over –40°C to 125°C ambient - meets Class 1 industrial accuracy. | Use Scenario: Signal conditioning for 120Ω or 350Ω foil strain gauges in structural health monitoring. IC Role / Device Role / Timing Role: High-input-impedance (225GΩ), low-bias-current amplifier minimizing gauge self-heating error. Use Value: 400pA max input bias current prevents >0.1% gain error in high-impedance quarter-bridge configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8421ARMZ | Higher 1.5nV/√Hz noise, 0.5µV/°C drift, no integrated RFI filter - requires external filtering for EMI robustness. | Better slew rate (25V/µs) but lower DC precision; suited for medium-speed, wide-temp applications where noise is less critical. | Select AD8421ARMZ when higher bandwidth (>10MHz) and faster settling are prioritized over sub-µV drift. |
| INA826AIDGKR | Lower supply current (1.1mA), wider common-mode range (V– – 0.1V to V+ – 1.2V), but 50µV offset and 0.8µV/°C drift - less precise at temperature extremes. | Optimized for low-power, battery-operated portable instruments; not rated for 125°C operation. | Choose INA826AIDGKR for handheld test equipment where power budget is constrained and ambient temp stays <85°C. |
Compared with AD8421ARMZ and INA826AIDGKR, the LT6370HDD#TRPBF delivers superior DC precision (25µV/0.4µV/°C), integrated EMI protection, and guaranteed H-grade thermal performance - making it the preferred choice for mission-critical industrial sensing where long-term stability and noise immunity are non-negotiable.
Availability
LT6370HDD#TRPBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, precision data acquisition systems, and high-reliability transducer signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for LT6370HDD#TRPBF 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 LT6370 product line delivers ultra-precision instrumentation amplifiers optimized for low-drift, high-CMRR signal conditioning in demanding sensor front-ends - designed specifically for applications where calibration stability and EMI resilience are essential.
FAQ
What is the maximum gain achievable with LT6370HDD#TRPBF?
The LT6370HDD#TRPBF supports gains from 1 to >1000 using a single external resistor RG, calculated as G = 1 + 24.2kΩ/RG. At G=1000, RG = 24.3Ω - but PCB trace resistance becomes significant, so gains above 500 require careful layout. The LT6370HDD#TRPBF datasheet confirms stable operation up to G=1000 with 19kHz bandwidth and 100µs settling time.
Does LT6370HDD#TRPBF require external capacitors for stability?
No, the LT6370HDD#TRPBF is internally compensated and does not require external compensation capacitors. It remains stable driving loads up to 100pF directly; for heavier capacitive loads (>100pF), a small series resistor (10–50Ω) between OUTPUT and the load is recommended. The LT6370HDD#TRPBF's simplified block diagram and typical performance curves confirm unconditional stability across all gains and supply voltages.
How does the REF pin function in LT6370HDD#TRPBF?
The REF pin on the LT6370HDD#TRPBF sets the output common-mode voltage - the output swings around this reference level. It accepts any voltage from V– to V+, has 20kΩ input resistance, and draws ±60µA max current. When REF = 0V, output is centered at 0V; when REF = 2.5V, output ranges from –7.5V to +12.5V (with ±15V supplies). This flexibility allows seamless interfacing with unipolar ADCs. The LT6370HDD#TRPBF's REF gain is precisely 1V/V with ±75ppm error.
Is LT6370HDD#TRPBF pin-compatible with other LT6370 variants?
Yes, the LT6370HDD#TRPBF shares identical pinout and functionality with all LT6370 DFN-package variants (e.g., LT6370IDD#TRPBF, LT6370HDD#PBF), differing only in temperature grade (H-grade = –40°C to 125°C) and packaging (tape-and-reel). Pin assignments, electrical behavior, and layout footprint are fully interchangeable - allowing drop-in replacement during design revision or qualification.
What is the thermal performance of LT6370HDD#TRPBF in its DFN package?
The LT6370HDD#TRPBF in its 10-pin 3mm × 3mm DFN package has θJA = 43°C/W and θJC = 5.5°C/W, with the exposed pad (Pin 11) internally connected to V–. For optimal thermal performance, the pad must be soldered to a minimum 100mm² copper pour tied to the V– plane. At 2.9mA supply current and ±15V supplies, junction temperature rise is <15°C above ambient - ensuring reliable operation at 125°C ambient with proper PCB layout. This thermal profile is validated in the LT6370HDD#TRPBF absolute maximum ratings table.
LT6370HDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 11V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 19 kHz
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 2.65mA
- Current - Output / Channel:
- 55 mA
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 35 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LT6370HDD#TRPBF FAQ
1.How can I place an order for LT6370HDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6370HDD#TRPBF 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 LT6370HDD#TRPBF reliable?
The price and inventory of LT6370HDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6370HDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6370HDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6370HDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6370HDD#TRPBF?
LT6370HDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6370HDD#TRPBF 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 LT6370HDD#TRPBF?
For technical support, including LT6370HDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6370HDD#TRPBF requirements.
6.How does Aetrix verify that LT6370HDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6370HDD#TRPBF 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 LT6370HDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6370HDD#TRPBF?
All LT6370HDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6370HDD#TRPBF, 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 LT6370HDD#TRPBF part is unused and in its original packaging.
Return procedure for LT6370HDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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