My Inquiry
My Account
Analog Devices Inc. LT1997IMS-2#PBF
- Part No.:
- LT1997IMS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads
- Datasheet:
-
LT1997IMS-2#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:410
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1997IMS-2#PBF from Analog Devices is a precision funnel difference amplifier designed for high-voltage-to-low-voltage signal translation in industrial data-acquisition front-ends. It provides pin-selectable gains of 0.1, 0.2, and 0.25 with 0.006% (60 ppm) max gain error, ±255 V input common-mode voltage range, and 105 dB minimum CMRR at G = 0.1 - enabling accurate attenuation and level-shifting of large differential signals into 5 V ADCs without external components.
For engineers reviewing the LT1997IMS-2#PBF datasheet, LT1997IMS-2#PBF pinout, LT1997IMS-2#PBF application, or LT1997IMS-2#PBF equivalent, this page delivers verified specifications, MSOP-16 package mapping, gain-selectable terminal functions, and real-world use cases in bidirectional current sensing and isolation-replacement circuits - all grounded in Analog Devices' Rev 0 datasheet and electrical characterization tables.
Technical Context
The LT1997IMS-2#PBF integrates a precision op amp with laser-trimmed, temperature-stable resistor networks (matching TC < 1 ppm/°C) to form a monolithic difference amplifier. Its three noninverting inputs (+INA/+INB/+INC) and three inverting inputs (–INA/–INB/–INC) route through internal 250 kΩ, 125 kΩ, and 100 kΩ resistors respectively, enabling gain selection via external connection - not internal switching logic.
Operation spans –40°C to +85°C with supply voltages from 3.3 V to 50 V (±1.65 V to ±25 V), rail-to-rail output swing, and shutdown current of 20 µA. The internal op amp operates in normal mode (V– ≤ VCMOP ≤ V+ – 1.75 V) or Over-The-Top mode (V+ – 1.75 V < VCMOP ≤ V– + 76 V), with input pins rated to ±270 V relative to V–.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | 0.1, 0.2, 0.25 - selected by connecting appropriate +IN/–IN pairs; enables precise scaling for 20 VP-P inputs to 5 V ADC full-scale range. |
| Max Gain Error | ±0.006% (60 ppm) - ensures sub-1 LSB error in 16-bit systems (e.g., LTC2364-16) across temperature and supply variations. |
| Input Common-Mode Range | ±255 V - supports direct interfacing to high-side shunt monitors and motor phase terminals without external attenuators or isolators. |
| CMRR (G = 0.1) | ≥105 dB - rejects >99.999% of common-mode noise in noisy industrial environments (e.g., VFDs, PLC I/O modules). |
| Supply Voltage Range | 3.3 V to 50 V - accommodates single-supply (5 V, 12 V, 24 V) and dual-supply (±15 V, ±25 V) configurations without redesign. |
| Quiescent Current | 350 µA active / 20 µA shutdown - enables low-power operation in battery-backed or energy-constrained monitoring nodes. |
| Bandwidth (G = 0.1) | 1 MHz –3 dB - supports accurate acquisition of 1 kHz sinusoidal inputs (e.g., power line harmonics) with <0.1% gain flatness. |
Pinout & Package
LT1997IMS-2#PBF uses a 16-lead plastic MSOP package (MS16), 4.0 mm × 3.0 mm footprint, with exposed pad connected to V–. Pin 1 is +INA; pin 16 is –INC. All pins are surface-mount compatible with standard reflow profiles (MSOP lead temp: 300°C for 10 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INA (Pin 1) | Noninverting input for G = 0.1 | Connects internally to 250 kΩ resistor; used with –INA to configure 0.1× attenuation path. |
| +INB (Pin 3) | Noninverting input for G = 0.2 | Connects internally to 125 kΩ resistor; paired with –INB for 0.2× scaling (e.g., 10 VP-P → 2 VP-P). |
| +INC (Pin 5) | Noninverting input for G = 0.25 | Connects internally to 100 kΩ resistor; used with –INC for 0.25× gain (e.g., 8 VP-P → 2 VP-P). |
| –INA (Pin 16) | Inverting input for G = 0.1 | Matches +INA's 250 kΩ network; critical for maintaining CMRR >105 dB at G = 0.1. |
| –INB (Pin 14) | Inverting input for G = 0.2 | Matches +INB's 125 kΩ network; ensures <1 ppm/°C gain drift over –40°C to +85°C. |
| –INC (Pin 12) | Inverting input for G = 0.25 | Matches +INC's 100 kΩ network; enables high-linearity (<2 ppm) attenuation up to 22×. |
| REF1 (Pin 6), REF2 (Pin 7) | Reference divider inputs | Set output DC offset when differential input = 0; enable level-shifting to match ADC reference (e.g., 2.5 V mid-scale). |
| SHDN (Pin 10) | Shutdown control | Active-high logic: ≥V+ – 1.2 V enables amplifier; ≤V+ – 2.5 V reduces current to 20 µA. |
| V+ (Pin 11), V– (Pin 8) | Power supply rails | V– is connected to exposed pad (Pin 15); thermal resistance θJA = 130°C/W - requires PCB copper pour for >100 mW dissipation. |
| OUT (Pin 9) | Analog output | Rail-to-rail swing (15 mV to V+ – 50 mV @ 5 mA load); drives 10 kΩ loads with <0.01% settling error in 19 µs (G = 0.1, ΔV = 10 V). |
Key Features
| Feature | Design Value |
|---|---|
| Three-pin-selectable gains | Eliminates need for external resistor networks or gain-switching ICs - reduces BOM count and layout area in space-constrained modules. |
| ±255 V common-mode input range | Enables direct connection to high-voltage bus monitoring points (e.g., 400 V DC link) without external attenuators or isolated amplifiers. |
| 0.006% max gain error (60 ppm) | Supports 16-bit system accuracy without calibration - critical for metrology-grade energy meters and test equipment. |
| 105 dB min CMRR at G = 0.1 | Maintains signal integrity in electrically noisy environments (e.g., factory floor, EV battery packs) where EMI couples onto long sensor cables. |
| 1 ppm/°C max gain drift | Ensures stable gain over wide ambient temperature swings - eliminates recalibration in uncooled outdoor instrumentation. |
| MSOP-16 package with exposed V– pad | Provides low thermal resistance (θJA = 130°C/W) and mechanical robustness for industrial PCB assembly and rework. |
Applications
| High-Voltage Motor Phase Monitoring | Isolation Circuit Replacement |
|---|---|
|
Use Scenario: Measuring phase-to-phase voltage and current in 3-phase 400 V AC motor drives using shunt-based current sensing and differential voltage probes. IC Role / Device Role / Timing Role: Funnel amplifier translates ±200 V differential inputs to ±2 V range compatible with 16-bit SAR ADCs while rejecting common-mode noise from PWM switching. Use Value: Achieves <0.01% THD and 89.5 dB SINAD (per typical FFT data) - matching performance of optocoupler-isolated solutions at lower cost and size. |
Use Scenario: Replacing expensive isolated amplifiers in PLC analog input modules requiring ±10 V signal conditioning. IC Role / Device Role / Timing Role: Provides galvanic-noise rejection via high CMRR (>105 dB) instead of physical isolation - simplifies safety certification and reduces component count. Use Value: Eliminates transformer/iso-amp bill-of-materials; maintains 125°C operating capability and ±255 V input tolerance without compromising measurement fidelity. |
| Bidirectional Battery Current Sensing | Industrial Data-Acquisition Front-End |
|
Use Scenario: Monitoring charge/discharge current in 48 V battery systems using high-side shunt resistors with common-mode voltages up to +55 V. IC Role / Device Role / Timing Role: Attenuates shunt voltage (±100 mV) with G = 0.25 to ±25 mV, then level-shifts to match 0–2.5 V ADC reference - preserving polarity information. Use Value: Delivers <2 ppm gain nonlinearity and ±80 µV max offset - enabling <1 mA resolution on 100 A shunts without software correction. |
Use Scenario: Signal conditioning stage in modular DAQ systems for vibration, temperature, and pressure sensors in oil & gas downhole tools. IC Role / Device Role / Timing Role: Translates high-common-mode sensor outputs (e.g., strain gauges on pressurized vessels) to low-voltage domain while rejecting 50/60 Hz mains interference. Use Value: 114 dB PSRR and 105 dB CMRR ensure >80 dB SNR in 100 dB dynamic range measurements - meeting IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar funnel amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA149IDR | Fixed G = 0.100 only; no pin-selectable gain options; 100 dB min CMRR; ±200 V CM range. | Limited to single-gain deployments; lacks flexibility for multi-range systems requiring G = 0.2 or G = 0.25. | Select when only 0.1× attenuation is needed and board space is constrained - but verify CMRR degradation above ±100 V. |
| AD8479ARZ | Fixed G = 1.0; ±600 V CM range; 86 dB min CMRR; higher 1.5 µV/°C offset drift. | Requires external attenuation for ADC compatibility; better suited for high-CM, low-gain applications like HV DC bus monitoring. | Choose for ±600 V operation where LT1997IMS-2#PBF's ±255 V limit is insufficient - accept trade-off in gain flexibility and CMRR. |
Compared with INA149IDR and AD8479ARZ, the LT1997IMS-2#PBF uniquely combines triple pin-selectable gains, ±255 V common-mode tolerance, and 105 dB CMRR in a single MSOP-16 package - making it optimal for multi-range industrial DAQ designs where gain reconfiguration and noise immunity are both critical.
Availability
LT1997IMS-2#PBF is available at Aetrix Electronics and suitable for industrial data-acquisition front-ends, bidirectional battery current sensing, and high-voltage motor phase monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT1997IMS-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 optimized for high-voltage signal conditioning in harsh environments - targeting applications where accuracy, reliability, and integration replace discrete resistor networks and isolated solutions.
FAQ
What is the maximum input common-mode voltage supported by the LT1997IMS-2#PBF?
The LT1997IMS-2#PBF supports an input common-mode voltage range of ±255 V relative to V–, as specified in the Absolute Maximum Ratings table. This rating applies to the +INA/–INA, +INB/–INB, and +INC/–INC pins and enables direct interfacing with high-voltage industrial buses without external attenuation. Operation beyond ±255 V risks permanent damage per datasheet Note 2.
How does gain selection work on the LT1997IMS-2#PBF?
The LT1997IMS-2#PBF implements gain selection via external connections to its dedicated input terminals: G = 0.1 uses +INA/–INA, G = 0.2 uses +INB/–INB, and G = 0.25 uses +INC/–INC. Each pair routes through precisely matched internal resistors (250 kΩ, 125 kΩ, 100 kΩ), eliminating need for external gain-setting components. No internal logic or configuration registers are involved.
What is the guaranteed operating temperature range for the LT1997IMS-2#PBF?
The LT1997IMS-2#PBF is rated for operation from –40°C to +85°C, as indicated by the "I" grade suffix in the part number and confirmed in the Order Information table. Electrical characteristics including gain error (±0.006%), CMRR (≥105 dB), and supply current (350 µA) are fully specified across this range per the "l" symbol in the Electrical Characteristics tables.
Can the LT1997IMS-2#PBF drive a 10 kΩ load with rail-to-rail output swing?
Yes - the LT1997IMS-2#PBF delivers rail-to-rail output swing with ≤150 mV headroom at V– and ≤900 mV headroom at V+ under 5 mA load (per Electrical Characteristics). At 10 kΩ load (500 µA), output swing is within 15 mV of each rail, supporting full-scale utilization of 5 V ADCs. Settling time remains <19 µs for 0.01% accuracy at G = 0.1.
Does the LT1997IMS-2#PBF require external reference components for level-shifting?
No - the LT1997IMS-2#PBF includes dual reference inputs (REF1 and REF2) that form an internal resistor divider to set output DC offset when differential input is zero. By applying a voltage (e.g., 2.5 V) to REF1/REF2, users can level-shift the output to match ADC reference midpoints without external op amps or DACs - a key feature confirmed in the Block Diagram and Applications Information sections.
LT1997IMS-2#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:
- 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP
LT1997IMS-2#PBF FAQ
1.How can I place an order for LT1997IMS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1997IMS-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 LT1997IMS-2#PBF reliable?
The price and inventory of LT1997IMS-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 LT1997IMS-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1997IMS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1997IMS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1997IMS-2#PBF?
LT1997IMS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1997IMS-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 LT1997IMS-2#PBF?
For technical support, including LT1997IMS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1997IMS-2#PBF requirements.
6.How does Aetrix verify that LT1997IMS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1997IMS-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 LT1997IMS-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1997IMS-2#PBF?
All LT1997IMS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1997IMS-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 LT1997IMS-2#PBF part is unused and in its original packaging.
Return procedure for LT1997IMS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1997IMS-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…
