My Inquiry
My Account
Analog Devices Inc. LT6372HUDC-1#PBF
- Part No.:
- LT6372HUDC-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LT6372HUDC-1#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,249
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT6372HUDC-1#PBF from Analog Devices is a gain-programmable, high-precision instrumentation amplifier with integrated output clamping and split-reference level shifting. It delivers 60µV max input offset voltage, 86dB min DC CMRR at G=1, 35ppm/°C max gain drift (G>1), and operates across –40°C to 125°C in a 20-pin 3mm × 4mm QFN package. It is designed for precision bridge and transducer signal conditioning into ADCs with rail-to-rail compatible output swing.
For engineers reviewing the LT6372HUDC-1#PBF datasheet, LT6372HUDC-1#PBF pinout, LT6372HUDC-1#PBF application, or LT6372HUDC-1#PBF equivalent, this page provides verified specifications, validated QFN20 pin functions, real-world level-shifted ADC interface use cases, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LT6372HUDC-1#PBF implements an enhanced three-op-amp instrumentation topology with laser-trimmed 12.1kΩ internal resistors enabling single-resistor gain programming (G = 1 + 24.2k/RG). Its proprietary bipolar process ensures low 0.6µV/°C input offset drift and 7nV/√Hz input voltage noise density at 1kHz.
It integrates dual output clamp terminals (CLLO/CLHI) that limit output voltage to ±0.55V relative to applied clamp references, and a split REF1/REF2 configuration allowing direct level shifting of the output to VREF/2 without external components-critical for driving mid-supply-referenced SAR ADCs like the LTC2367-16.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | G = 1 to >1000 via single external resistor RG; enables flexible sensor scaling without redesign. |
| Input Offset Voltage | 60µV max (–40°C to 125°C); reduces calibration burden in high-resolution data acquisition. |
| DC CMRR | 86dB min at G=1; rejects common-mode interference in noisy industrial environments. |
| Gain Drift | 35ppm/°C max (G > 1); maintains accuracy over wide temperature ranges without recalibration. |
| Bandwidth | 3.1MHz at G=1; supports fast step response (5.8µs to 0.0015%) for dynamic measurements. |
| Supply Range | 4.75V to 35V total; accommodates single- or dual-supply systems including ±15V industrial rails. |
| Output Clamp Accuracy | ±0.55V typical clamp offset; protects downstream ADC inputs from overvoltage damage. |
Pinout & Package
The LT6372HUDC-1#PBF is housed in a 20-lead (3mm × 4mm) plastic QFN package with exposed pad connected to V– (Pin 7). Thermal resistance θJA = 52°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 5) | Positive differential input | High-impedance node for sensor positive signal; matched bias current minimizes CM error. |
| –IN (Pin 2) | Negative differential input | High-impedance node for sensor negative signal; laser-trimmed matching enables 86dB CMRR. |
| +RG,F / +RG,S (Pins 17, 18) | Gain resistor feed-forward/sense | Separate routing paths minimize PCB trace resistance errors in high-gain configurations. |
| –RG,F / –RG,S (Pins 19, 20) | Gain resistor feed-forward/sense | Paired with +RG pins to form Kelvin connection for precise gain setting (G = 1 + 24.2k/RG). |
| REF1 / REF2 (Pins 12, 15) | Output reference divider inputs | Enable programmable level shift: output = (VREF1 + VREF2)/2 + G×(V+IN – V–IN). |
| CLHI / CLLO (Pins 10, 8) | Output clamp voltage references | Define upper/lower output limits; output clamps to VCLHI + 0.55V and VCLLO – 0.55V. |
| OUTPUT (Pin 13) | Difference amplifier output | Single-ended output referenced to REF1/REF2 midpoint; drives ADC inputs directly. |
| V+ / V– (Pins 14, 7) | Power supply terminals | Support wide 4.75V–35V operation; exposed pad tied to V– improves thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated output clamping | Eliminates need for external diode clamps, reducing BOM count and layout area while ensuring repeatable ±0.55V clamp offset. |
| Split-reference level shifting | Enables direct interfacing to mid-scale-referenced ADCs (e.g., LTC2367-16) without external op amps or resistive dividers. |
| Laser-trimmed gain-setting resistors | Ensures 0.12% gain error at G=100 using only one external resistor, simplifying design and improving production yield. |
| On-chip RFI filtering | Maintains DC precision in harsh EMI environments (e.g., motor drives, industrial PLCs) without adding external RC filters. |
| Wide temperature grade | Specified from –40°C to 125°C (H-grade), supporting under-hood automotive and high-ambient industrial applications. |
Applications
| Bridge Amplifier | Data Acquisition |
|---|---|
Use Scenario: Amplifying mV-level outputs from full-bridge strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: Precision difference amplifier with programmable gain (G=100–1000) and output clamping to protect 16-bit ADC inputs. Use Value: 60µV offset and 0.01% max gain error enable sub-10µε resolution without factory calibration. | Use Scenario: Front-end signal conditioning for portable battery-powered data loggers measuring thermocouples and RTDs. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier with level shift to match ADC reference (e.g., LTC6655-5), operating from 4.75V supply. Use Value: 0.6µV/°C offset drift and 3.1MHz bandwidth support accurate cold-junction compensation and fast sampling. |
| Thermocouple Amplifier | Medical Instrumentation |
Use Scenario: Isolated K-type thermocouple measurement in HVAC control panels with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-CMRR (120dB at G=100) amplifier rejecting ground-loop noise, with REF1/REF2 configured for 2.5V level shift. Use Value: 35ppm/°C gain drift ensures <0.1°C error over –40°C to 125°C without software compensation. | Use Scenario: Biopotential signal amplification (ECG/EEG) where low noise and DC precision are critical for diagnostic accuracy. IC Role / Device Role / Timing Role: Ultra-low-noise (0.2µVP-P, 0.1–10Hz) instrumentation amplifier with integrated clamps preventing ADC saturation during electrode pop. Use Value: 800pA max input bias current avoids loading high-impedance dry electrodes, preserving signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8421ARMZ | Lower bandwidth (10MHz), no integrated clamps or level-shift REF pins; requires external circuitry for ADC interfacing. | Better suited for high-speed, wide-bandwidth applications where clamping is handled upstream. | Select when >3.1MHz bandwidth is required and system-level clamping is already implemented. |
| INA826IDRCT | Higher input offset (125µV max), no output clamping; smaller 8-pin WSON package but lacks REF1/REF2 flexibility. | Ideal for space-constrained, cost-sensitive designs where ±125µV offset is acceptable and level shift is done externally. | Choose for compact PCB layouts where full LT6372-1 feature set is not needed and 125µV offset meets system spec. |
Compared with AD8421ARMZ and INA826IDRCT, the LT6372HUDC-1#PBF uniquely integrates output clamping and split-reference level shifting-reducing component count and layout complexity in precision ADC front-ends, especially for H-grade industrial and automotive applications.
Availability
LT6372HUDC-1#PBF is available at Aetrix Electronics and suitable for bridge amplifier, thermocouple measurement, medical instrumentation, and industrial data acquisition requiring stable component supply across extended temperature ranges.
Supply support for LT6372HUDC-1#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT6372 family was engineered specifically for high-accuracy sensor signal conditioning into precision ADCs-emphasizing ultra-low drift, integrated level shifting, and robust output protection in harsh environments.
FAQ
What is the maximum operating temperature range for the LT6372HUDC-1#PBF?
The LT6372HUDC-1#PBF is rated for continuous operation from –40°C to +125°C (H-grade), making it suitable for under-hood automotive, industrial motor control, and high-ambient-temperature instrumentation applications. This specification is fully tested and guaranteed per the manufacturer's datasheet Rev. 0 absolute maximum ratings table.
Does the LT6372HUDC-1#PBF require external components to interface with a mid-supply referenced ADC?
No-the LT6372HUDC-1#PBF does not require external components to interface with a mid-supply referenced ADC. Its integrated REF1 and REF2 pins allow direct configuration of a split reference (e.g., REF1 = 0V, REF2 = 5V) to level-shift the output to 2.5V, matching the center of a 0–5V ADC input range without external op amps or resistor dividers.
How does the LT6372HUDC-1#PBF implement output clamping, and what is the typical clamp voltage accuracy?
The LT6372HUDC-1#PBF implements output clamping via dedicated CLHI and CLLO pins. When voltages are applied to these pins, the output is clamped to VCLHI + 0.55V (high side) and VCLLO – 0.55V (low side), with typical accuracy of ±0.1V over temperature. This eliminates external clamp diodes and ensures repeatable protection of sensitive ADC inputs.
What gain-setting resistor value is required for G = 100 on the LT6372HUDC-1#PBF?
For G = 100 on the LT6372HUDC-1#PBF, the required external gain-setting resistor is 243Ω, calculated using RG = 24.2kΩ / (G – 1). This value is explicitly listed in Table 1 of the datasheet and corresponds to a standard 1% metal-film resistor, ensuring ≤0.12% gain error at G = 100.
Is the LT6372HUDC-1#PBF pin-compatible with earlier LT6370 or LT6372-1 variants in the same QFN package?
Yes-the LT6372HUDC-1#PBF shares identical pinout, footprint, and electrical functionality with other LT6372-1 variants in the 20-lead 3mm × 4mm QFN package (e.g., LT6372IUDC-1#PBF), differing only in temperature grade (H-grade vs I-grade) and part marking (LHHV). No PCB changes are required when upgrading from I-grade to H-grade in the same package.
LT6372HUDC-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 11V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 3.1 MHz
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 2.75mA
- 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:
- 20-QFN (3x4)
LT6372HUDC-1#PBF FAQ
1.How can I place an order for LT6372HUDC-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6372HUDC-1#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 LT6372HUDC-1#PBF reliable?
The price and inventory of LT6372HUDC-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6372HUDC-1#PBF is usually 5 days.
3.What payment methods are accepted for LT6372HUDC-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6372HUDC-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6372HUDC-1#PBF?
LT6372HUDC-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6372HUDC-1#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 LT6372HUDC-1#PBF?
For technical support, including LT6372HUDC-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6372HUDC-1#PBF requirements.
6.How does Aetrix verify that LT6372HUDC-1#PBF is sourced from the original manufacturer or authorized distributors?
All LT6372HUDC-1#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 LT6372HUDC-1#PBF meets industry standards.
7.What is the process for return or replacement of LT6372HUDC-1#PBF?
All LT6372HUDC-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6372HUDC-1#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 LT6372HUDC-1#PBF part is unused and in its original packaging.
Return procedure for LT6372HUDC-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT6372HUDC-1#PBF Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
