My Inquiry
My Account
Analog Devices Inc. LT1997HDF-2#PBF
- Part No.:
- LT1997HDF-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-WFDFN Exposed Pad, 12 Leads
- Datasheet:
-
LT1997HDF-2#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,191
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1997HDF-2#PBF from Analog Devices is a precision funnel (attenuating difference) amplifier designed for high-voltage differential signal conditioning into low-voltage ADCs. It delivers pin-selectable gains of 0.1, 0.2, or 0.25 with ±0.006% gain error, ±255V input common-mode range, and >105dB CMRR at G=0.1 - enabling robust current/voltage sensing in industrial motor drives and power monitoring systems.
For engineers reviewing the LT1997HDF-2#PBF datasheet, LT1997HDF-2#PBF pinout, LT1997HDF-2#PBF application, or LT1997HDF-2#PBF equivalent, this page provides verified package mapping (14-lead DFN), validated gain accuracy over –40°C to 125°C, confirmed rail-to-rail output swing, real-world settling time (15µs @ 0.1%), and exact alternative part comparisons for high-CMRR attenuator selection.
Technical Context
The LT1997HDF-2#PBF integrates a precision op amp with laser-trimmed, temperature-stable thin-film resistors (matching <1ppm/°C) to form a monolithic difference amplifier. Its internal resistor network enables three fixed attenuation paths without external components, each optimized for gain accuracy and linearity.
It operates across ±255V common-mode inputs while maintaining >103dB CMRR (DFN package, G=0.1, VCM=±255V), supported by Over-The-Top® op amp architecture that extends functionality beyond supply rails - critical for isolated front-end signal translation in energy metering and HV battery monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Pin-selectable 0.1 / 0.2 / 0.25 - enables precise scaling of ±20V, ±10V, or ±8V differential inputs to 5V ADC full-scale without external resistors. |
| Gain Error | ±0.006% (60ppm) max - ensures <±1 LSB error in 16-bit systems when driving LTC2364-16 ADC. |
| Input CM Range | ±255V - supports direct connection to shunt-based current sensing in 400V DC bus applications. |
| CMRR | 103dB min (G=0.1, VCM=±255V, DF14 package) - rejects noise from noisy power rails in motor control inverters. |
| Supply Range | 3.3V to 50V total - accommodates single-supply 5V logic interfaces or dual ±15V industrial systems. |
| Quiescent Current | 350µA active / 20µA shutdown - enables always-on monitoring with ultra-low standby power in smart sensors. |
| Bandwidth | 1MHz (G=0.1) - sufficient for 1kHz sinusoidal signals with <0.1% gain flatness and 104dB SFDR. |
Pinout & Package
LT1997HDF-2#PBF uses a 14-lead (4mm × 4mm) plastic DFN package with exposed thermal pad (Pin 15 = V–). The package is RoHS-compliant, rated for –40°C to +125°C operation, and requires soldering of the exposed pad to PCB for thermal performance (θJA = 45°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INA | Noninverting Input (G=0.1) | Connects to 250kΩ internal resistor; used for 10:1 attenuation path with matched –INA. |
| +INB | Noninverting Input (G=0.2) | Connects to 125kΩ internal resistor; enables 5:1 attenuation with matched –INB. |
| +INC | Noninverting Input (G=0.25) | Connects to 100kΩ internal resistor; enables 4:1 attenuation with matched –INC. |
| –INA, –INB, –INC | Inverting Inputs | Matched to respective +IN pins; form differential pairs defining gain paths. |
| REF | Output Reference Level | Sets zero-difference output voltage; tied to mid-supply or external reference for level-shifting. |
| SHDN | Shutdown Control | Active-high logic: ≥(V+ – 1.2V) enables, ≤(V+ – 2.5V) disables (20µA IQ). |
| V+, V– | Power Supply Rails | V+ (Pin 11), V– (exposed pad Pin 15); supports up to 60V total supply differential. |
| OUT | Analog Output | Rail-to-rail output capable of ±2.8V swing on 5V supply; drives 10kΩ loads with <2mV error. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Resistor Matching | Guaranteed <1ppm/°C TC and <2ppm nonlinearity - eliminates drift-induced calibration loss in field-deployed instrumentation. |
| Over-The-Top® Input Stage | Supports VCMOP up to V– + 76V - enables operation with inputs exceeding V+ rail in high-side sensing configurations. |
| Three-Gain Flexibility | Hardware-selectable via pin strapping - avoids firmware configuration overhead and reduces BOM count in multi-range designs. |
| High-Voltage Robustness | ±270V absolute max input rating per pin - withstands transient surges in industrial PLC analog input modules. |
| Low Power Shutdown | 20µA quiescent current - allows integration into battery-backed data loggers without compromising runtime. |
Applications
| Motor Phase Current Sensing | Energy Meter Voltage Scaling |
|---|---|
|
Use Scenario: Measuring bidirectional current in 400V DC bus motor drives using shunt resistors. IC Role / Device Role / Timing Role: Attenuates ±200mV shunt voltage to ±2V range compatible with 16-bit SAR ADCs while rejecting common-mode noise from PWM switching. Use Value: Delivers 105dB CMRR at ±255V CM, ensuring <0.01% measurement error under 20kHz switching noise. |
Use Scenario: Scaling 230V AC line voltage (±325V peak) to 0–5V for isolation-free metering ICs. IC Role / Device Role / Timing Role: Precision funnel amplifier with G=0.1 and REF tied to 2.5V reference, providing accurate level-shifted output. Use Value: ±0.006% gain error maintains Class 0.2 accuracy over –40°C to 125°C without recalibration. |
| Battery Management System (BMS) Cell Monitoring | Industrial Process Transmitter Interface |
|
Use Scenario: Isolation-free monitoring of individual 3.7V Li-ion cells in 96-cell EV battery packs (up to 355V total). IC Role / Device Role / Timing Role: Attenuates cell voltage differences (±5V range) to ADC-compatible levels while rejecting pack-level common-mode transients. Use Value: ±255V CM range and 15µs settling time support fast sampling of all 96 cells within 1ms cycle time. |
Use Scenario: Conditioning 4–20mA loop-powered transmitter outputs for microcontroller ADC input. IC Role / Device Role / Timing Role: Converts current-loop voltage drop across precision shunt into calibrated 0–5V signal with programmable offset. Use Value: REF pin enables direct 4mA zero-point offset adjustment; rail-to-rail output ensures full ADC utilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar funnel amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8479ARZ | Fixed G=1, ±600V CM range, 85dB CMRR at 60Hz, SOIC-8 package | Higher voltage rating but lower CMRR and no gain flexibility; suited for pure high-CM rejection, not scaling | Select AD8479ARZ only when ±600V operation is mandatory and gain adjustment is handled externally. |
| INA149AIDR | Fixed G=1, ±270V CM, 100dB CMRR, SOIC-8, 1.2MHz BW | No selectable gain; higher bandwidth but lower CMRR than LT1997HDF-2#PBF at ±255V | Choose INA149AIDR for cost-sensitive designs needing basic isolation replacement without gain tuning. |
Compared with AD8479ARZ and INA149AIDR, the LT1997HDF-2#PBF uniquely combines pin-selectable attenuation, guaranteed 103dB CMRR at ±255V, and 1ppm/°C resistor matching - making it the only option for high-accuracy, multi-range, high-CM industrial sensing where calibration stability and design flexibility are critical.
Availability
LT1997HDF-2#PBF is available at Aetrix Electronics and suitable for industrial motor control, energy metering, battery management systems, and process automation requiring stable component supply across extended temperature ranges.
Supply support for LT1997HDF-2#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 LT1997-2 product line delivers precision, wide common-mode funnel amplifiers for high-voltage signal conditioning - engineered specifically for accuracy-critical front-end acquisition in harsh industrial environments.
FAQ
What is the operating temperature range for LT1997HDF-2#PBF?
The LT1997HDF-2#PBF is specified for continuous operation from –40°C to +125°C. This H-grade qualification ensures full performance compliance - including ±0.006% gain error and >103dB CMRR - across the entire range, unlike the I-grade (–40°C to +85°C) variants.
Does LT1997HDF-2#PBF require external resistors to set gain?
No. The LT1997HDF-2#PBF integrates laser-trimmed, matched thin-film resistors for gains of 0.1, 0.2, and 0.25. Gain selection is achieved solely by connecting the appropriate +IN/–IN pin pair (e.g., +INA/–INA for G=0.1); no external components are needed for basic attenuation.
How does the REF pin function in LT1997HDF-2#PBF?
The REF pin sets the output voltage when the differential input is zero. For example, tying REF to 2.5V produces an output centered at 2.5V - essential for bipolar-to-unipolar conversion before ADC sampling. It supports both single-ended and differential reference configurations.
Can LT1997HDF-2#PBF interface directly with a 5V ADC?
Yes. With G=0.1 and ±20V differential input, LT1997HDF-2#PBF delivers ±2V output - fully compatible with 5V ADCs like the LTC2364-16. Its rail-to-rail output swings to within 50mV of rails on 5V supply, ensuring >98% dynamic range utilization.
What is the maximum input voltage allowed on LT1997HDF-2#PBF pins?
The absolute maximum voltage on any input pin (+INA, –INA, etc.) is V– ±270V. This rating is independent of supply voltage and enables safe operation in 400V+ systems. Exceeding this limit risks permanent damage, even if within common-mode range specifications.
LT1997HDF-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad, 12 Leads
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.75V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 350µA
- Current - Output / Channel:
- 32 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:
- 14-DFN (4x4)
LT1997HDF-2#PBF FAQ
1.How can I place an order for LT1997HDF-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1997HDF-2#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 LT1997HDF-2#PBF reliable?
The price and inventory of LT1997HDF-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1997HDF-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1997HDF-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1997HDF-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1997HDF-2#PBF?
LT1997HDF-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1997HDF-2#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 LT1997HDF-2#PBF?
For technical support, including LT1997HDF-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1997HDF-2#PBF requirements.
6.How does Aetrix verify that LT1997HDF-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1997HDF-2#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 LT1997HDF-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1997HDF-2#PBF?
All LT1997HDF-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1997HDF-2#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 LT1997HDF-2#PBF part is unused and in its original packaging.
Return procedure for LT1997HDF-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1997HDF-2#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…
