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Analog Devices Inc. LT6370IDD#TRPBF
- Part No.:
- LT6370IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT6370IDD#TRPBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,101
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Product details
Overview
LT6370IDD#TRPBF from Analog Devices is a gain-programmable, high-precision instrumentation amplifier in a 10-pin 3mm × 3mm DFN package (DD10), delivering 25µV max input offset voltage, 0.3µV/°C max drift, 94dB min CMRR at G=1, 3.1MHz bandwidth, and integrated RFI filtering - enabling high-fidelity bridge and thermocouple signal conditioning in industrial data acquisition systems.
For engineers reviewing the LT6370IDD#TRPBF datasheet, LT6370IDD#TRPBF pinout, LT6370IDD#TRPBF application, or LT6370IDD#TRPBF equivalent, this page provides verified DC precision specs, thermal stability data, gain-setting resistor guidance, EMI-hardened input behavior, and validated alternatives for sensor front-end design under –40°C to 85°C operating conditions.
Technical Context
The LT6370IDD#TRPBF implements an enhanced three-op-amp instrumentation topology with laser-trimmed 12.1kΩ internal resistors and proprietary bipolar process transistors (Q1/Q2) for ultra-low drift and matched gain-stage performance. Its transconductance-scaling architecture ensures bandwidth self-adjusts with gain (3.1MHz at G=1, 19kHz at G=1000), preserving settling time integrity across multiplexed channels.
EMI filtering is monolithically integrated on both inputs, and the REF pin supports precise differential-to-single-ended conversion with ±10ppm REF gain error. The DD10 package features an exposed pad connected to V–, enabling low-θJA (43°C/W) thermal performance critical for high-density analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 25µV max (DD10 package, –40°C to 85°C) - enables sub-100µV signal resolution without calibration drift. |
| Offset Drift | 0.3µV/°C max (DD10, –40°C to 85°C) - guarantees <±0.3mV total drift over full industrial temperature range. |
| CMRR | 94dB min at G=1 (DC–60Hz) - rejects common-mode noise from long sensor cables and noisy power rails. |
| Bandwidth | 3.1MHz at G=1 - supports fast step response (<5.8µs to 0.0015%) in multiplexed DAQ systems. |
| Noise Density | 7nV/√Hz at 1kHz - preserves SNR in low-level transducer outputs (e.g., strain gauges, RTDs). |
| Supply Range | ±2.375V to ±17.5V (4.75V–35V total) - operates from single 5V or dual ±15V rails with 2.65mA quiescent current. |
| Gain Programmability | G = 1 to >1000 via single external resistor RG - simplifies BOM and layout vs. fixed-gain alternatives. |
Pinout & Package
LT6370IDD#TRPBF uses a 10-pin 3mm × 3mm plastic DFN (DD10) package with exposed pad connected to V–. Pin 1 is –RG; pins 2 and 9 are NC; pin 11 (exposed pad) must be soldered to PCB ground plane or left floating per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–RG) | Negative gain-set resistor terminal | Completes external RG connection; matches +RG (pin 8) for accurate gain programming (G = 1 + 24.2k/RG). |
| 2, 9 (NC) | No internal connection | Must remain unconnected; no routing or copper pour required. |
| 3 (+IN) | Positive high-impedance input | Accepts differential sensor signals up to V– + 1.8V / V+ – 1.4V; 225GΩ input resistance minimizes loading. |
| 4 (–IN) | Negative high-impedance input | Paired with +IN; laser-trimmed matching ensures <±1.5µV hysteresis over thermal cycling. |
| 5 (REF) | Output reference voltage input | Sets output common-mode level; supports rail-to-rail referencing with ±10ppm gain error. |
| 6 (OUTPUT) | Differential-to-single-ended output | Drives 2kΩ loads to ±14.9V swing (±15V supply); 80mA short-circuit capability prevents latch-up. |
| 7 (V+) | Positive power supply | Requires local 0.1µF ceramic bypass to ground; θJC = 5.5°C/W enables high-power-density layouts. |
| 8 (+RG) | Positive gain-set resistor terminal | Forms Kelvin connection with –RG (pin 1); eliminates PCB trace resistance errors in precision gain setting. |
| 10 (V–) | Negative power supply | Connects to exposed pad (pin 11); bypass capacitor mandatory for PSRR >110dB across 4.75–35V range. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed input offset | 25µV max (DD10, –40°C to 85°C) - reduces system calibration burden and improves long-term measurement repeatability. |
| Integrated RFI filter | EMIRR >140dB at 1GHz - maintains accuracy in motor drives, PLCs, and RF-noisy factory environments. |
| Self-adjusting bandwidth | 3.1MHz @ G=1, 19kHz @ G=1000 - preserves signal fidelity across programmable gain ranges without external compensation. |
| Low 1/f noise | 0.2µVP-P (0.1Hz–10Hz) - critical for DC-stable measurements in weigh scales and medical sensors. |
| High input impedance | 225GΩ differential input resistance - prevents loading of high-Z sources like piezoelectric transducers. |
| Thermal hysteresis control | ±1.5µV max input offset hysteresis - ensures stable readings after thermal cycling in outdoor or automotive applications. |
Applications
| Bridge Amplifier | Data Acquisition |
|---|---|
|
Use Scenario: Amplifying mV-level outputs from Wheatstone bridge pressure sensors in HVAC controllers. 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 0.3µV/°C drift enable ±0.1%FS accuracy over –40°C to 85°C without recalibration. |
Use Scenario: Front-end signal conditioning for 16-bit simultaneous-sampling industrial DAQ modules. IC Role / Device Role / Timing Role: Multiplexed sensor interface with 5.8µs settling to 0.0015% for high-throughput channel scanning. Use Value: 3.1MHz bandwidth and self-adjusting gain-bandwidth product maintain consistent step response across all programmable gains. |
| Thermocouple Amplifier | Strain Gauge Amplifier |
|
Use Scenario: Cold-junction-compensated K-type thermocouple measurement in furnace monitoring systems. IC Role / Device Role / Timing Role: Low-noise, high-CMRR amplifier rejecting millivolt-level thermocouple signals amid 60Hz line noise. Use Value: 94dB CMRR at DC–60Hz and 7nV/√Hz noise density preserve µV-level thermal EMF resolution. |
Use Scenario: Full-bridge strain gauge readout in structural health monitoring of bridges and cranes. IC Role / Device Role / Timing Role: High-input-impedance (225GΩ), low-drift amplifier driving ratiometric ADC references. Use Value: 0.2µVP-P 0.1Hz–10Hz noise and ±1.5µV hysteresis ensure stable microstrain detection over decades of service life. |
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/f noise (0.25µVP-P), wider offset drift (0.5µV/°C), no integrated RFI filter | Better suited for high-speed (>10MHz) but lower-precision applications where EMI is not dominant | Select AD8421ARMZ only when bandwidth >10MHz is required and thermal drift budget allows >0.5µV/°C. |
| INA826AIDGKR | Lower bandwidth (1.5MHz), higher input bias current (1.5nA), no laser trimming (50µV offset) | Cost-optimized for consumer-grade portable instruments with relaxed DC accuracy requirements | Choose INA826AIDGKR for battery-powered handheld devices where 50µV offset and 1.5MHz BW are acceptable. |
Compared with AD8421ARMZ and INA826AIDGKR, the LT6370IDD#TRPBF delivers superior DC precision (25µV offset, 0.3µV/°C drift), integrated EMI hardening, and self-adjusting bandwidth - making it optimal for high-reliability industrial sensor interfaces demanding long-term stability and noise immunity.
Availability
LT6370IDD#TRPBF is available at Aetrix Electronics and suitable for industrial data acquisition, precision bridge sensing, thermocouple measurement, and strain gauge readout requiring stable component supply across extended temperature ranges.
Supply support for LT6370IDD#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 since 1965.
The LT6370 series was designed specifically for high-accuracy sensor signal conditioning in harsh electromagnetic environments, emphasizing ultra-low drift, integrated RFI rejection, and programmable gain without sacrificing bandwidth or noise performance.
FAQ
What is the maximum gain achievable with LT6370IDD#TRPBF using a standard 1% resistor?
The LT6370IDD#TRPBF supports gains up to >1000 using external RG. For integer gain 1000, a 24.3Ω 1% resistor yields G = 1 + 24.2k/24.3 ≈ 1000.04 - confirmed in Table 1 of the datasheet. Higher gains are possible but require sub-10Ω resistors where PCB trace resistance begins to dominate error budgets.
Does LT6370IDD#TRPBF require external capacitors on the power supply pins?
Yes, LT6370IDD#TRPBF requires local 0.1µF ceramic bypass capacitors between V+ (pin 7) and V– (pin 10) to ground. This is mandatory to achieve specified PSRR (>110dB) and prevent oscillation, especially given the DD10 package's low inductance path to the exposed V– pad.
How does the LT6370IDD#TRPBF handle RF interference on its inputs?
The LT6370IDD#TRPBF integrates monolithic RFI filters on both +IN and –IN pins, achieving >140dB EMIRR at 1GHz. This is measured as 20log(100mV/ΔVOS) with inputs driven differentially, ensuring DC precision remains intact even in proximity to switch-mode power supplies or radio transmitters.
What is the thermal resistance (θJA) of the LT6370IDD#TRPBF DD10 package?
The LT6370IDD#TRPBF in the 10-pin 3mm × 3mm DFN (DD10) package has θJA = 43°C/W and θJC = 5.5°C/W. The exposed pad (pin 11) must be soldered to a thermal pad on the PCB to realize this performance; insufficient copper area increases θJA significantly.
Can the REF pin of LT6370IDD#TRPBF be left unconnected?
No, the REF pin (pin 5) of LT6370IDD#TRPBF must be actively driven - either to ground, to a precision voltage reference, or to the ADC's reference node. Leaving it floating causes undefined output common-mode level and violates absolute maximum ratings; typical designs tie REF to the same potential as the ADC's VREF.
LT6370IDD#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:
- 15 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LT6370IDD#TRPBF FAQ
1.How can I place an order for LT6370IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6370IDD#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 LT6370IDD#TRPBF reliable?
The price and inventory of LT6370IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6370IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6370IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6370IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6370IDD#TRPBF?
LT6370IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6370IDD#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 LT6370IDD#TRPBF?
For technical support, including LT6370IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6370IDD#TRPBF requirements.
6.How does Aetrix verify that LT6370IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6370IDD#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 LT6370IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6370IDD#TRPBF?
All LT6370IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6370IDD#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 LT6370IDD#TRPBF part is unused and in its original packaging.
Return procedure for LT6370IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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