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Analog Devices Inc. LT1997IMS-1#PBF
- Part No.:
- LT1997IMS-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads
- Datasheet:
-
LT1997IMS-1#PBF.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,274
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Product details
Overview
LT1997IMS-1#PBF from Analog Devices is a precision, high-voltage, gain-selectable difference amplifier optimized for bidirectional current sensing in industrial power systems. It integrates a matched resistor network and precision op amp to deliver 0.012% gain error (G=10), 109dB CMRR, and input common-mode range from V– to V– + 76V - enabling accurate high-side or low-side shunt monitoring in ±15V or single-supply 3.3V–50V systems.
For engineers reviewing the LT1997IMS-1#PBF datasheet, LT1997IMS-1#PBF pinout, LT1997IMS-1#PBF application, or LT1997IMS-1#PBF equivalent, key selection criteria include guaranteed gain accuracy over temperature, rail-to-rail output swing, shutdown current of 20µA, and MSOP-16 package compatibility with space-constrained industrial front-ends and motor control PCBs.
Technical Context
The LT1997IMS-1#PBF implements a fully integrated difference amplifier architecture with three dedicated noninverting/inverting input pairs (+INA/–INA, +INB/–INB, +INC/–INC) that select fixed gains of 10, 20, or 50 via internal 15k/7.5k/3k resistor networks. Its Over-The-Top® op amp allows operation with input voltages up to V– + 76V independent of V+, supporting wide common-mode voltage translation without external level-shifting circuitry.
Gain configuration is determined solely by which input pair is driven; no external resistors are required. The device maintains <1ppm/°C gain drift and <2ppm nonlinearity due to laser-trimmed thin-film resistors, and achieves 650kHz bandwidth at G=10 while consuming only 350µA quiescent current - balancing speed, precision, and power efficiency for real-time current feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Pin-selectable 10, 20, or 50 V/V - enables precise current scaling without external components or layout changes |
| Gain Error (G=10) | ±0.012% max (120ppm) - ensures ≤1.2mV error on 10V full-scale output for high-accuracy shunt measurement |
| CMRR (G=10) | ≥109dB - rejects >316,000:1 common-mode interference in noisy industrial bus environments |
| Input CM Range | V– to V– + 76V - supports direct connection to 60V DC bus or 48V telecom systems without attenuators |
| Supply Range | 3.3V to 50V total - operates from single 5V logic supply or dual ±15V analog rails |
| Output Swing | Rail-to-rail - delivers full dynamic range into ADC inputs or comparator thresholds |
| Quiescent Current | 350µA active / 20µA shutdown - enables always-on monitoring or low-power sleep modes |
Pinout & Package
LT1997IMS-1#PBF is housed in a 16-lead plastic MSOP package (MS16 variation) with exposed pad connected to V–. Pin 15 is the exposed thermal pad, soldered to PCB ground plane for thermal management and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INA | Noninverting input for G=10 | Connects to 15k internal resistor; used for standard 10× current sense gain |
| –INA | Inverting input for G=10 | Matches +INA path; forms differential pair with 15k resistors for 10× amplification |
| +INB / –INB | Noninverting/inverting inputs for G=20 | 7.5k internal resistors enable 20× gain for higher sensitivity shunt applications |
| +INC / –INC | Noninverting/inverting inputs for G=50 | 3k internal resistors support 50× gain for µΩ-level shunt measurements |
| REF1 / REF2 | Reference divider inputs | Set output zero-point; enable offset calibration or bipolar output centering |
| SHDN | Shutdown control | Pull ≥2.5V below V+ to reduce supply current to 20µA; floating = active |
| OUT | Analog output | Rail-to-rail voltage output referenced to V–; drives 10kΩ loads directly |
| V+ / V– | Power supply rails | Support asymmetric supplies (e.g., +5V/0V or +15V/–15V); V– connects to exposed pad |
Key Features
| Feature | Design Value |
|---|---|
| Matched resistor network | Laser-trimmed thin-film resistors guarantee <0.012% gain error and <1ppm/°C drift across –40°C to 85°C |
| Over-The-Top® input stage | Operates with inputs up to V– + 76V regardless of V+ - eliminates need for external high-voltage attenuators |
| Three fixed-gain options | Hardware-selectable 10/20/50 V/V via dedicated pin pairs - no external resistors or layout variants required |
| Low-noise precision op amp | 65µV max offset, 31nV/√Hz input noise at 1kHz, and 650kHz bandwidth at G=10 for fast transient response |
| Industrial temperature grade | Specified from –40°C to +85°C - validated for use in motor drives, PLCs, and solar inverters |
Applications
| High-Side Current Sensing | Bidirectional Motor Control |
|---|---|
Use Scenario: Monitoring battery discharge/charge current in 48V EV auxiliary systems using a high-side shunt. IC Role / Device Role / Timing Role: Difference amplifier translating mV-level shunt voltage to 0–5V ADC range while rejecting 48V common-mode bus noise. Use Value: 109dB CMRR ensures <50µV error under 48V ripple, enabling ±0.5% current accuracy without isolation. | Use Scenario: Closed-loop torque control in BLDC motor drives with H-bridge outputs. IC Role / Device Role / Timing Role: Bidirectional current monitor feeding real-time phase current data to PWM controller. Use Value: Rail-to-rail output and 650kHz bandwidth capture fast current transients during commutation switching. |
| Industrial Data-Acquisition Front-End | High-Voltage Level Translation |
Use Scenario: Precision current measurement in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Signal conditioner converting shunt voltage to isolated ADC input with minimal gain drift. Use Value: 0.012% gain error and <1ppm/°C drift maintain calibration stability over extended field deployment. | Use Scenario: Converting ±10V sensor signals to 0–3.3V microcontroller input in test equipment. IC Role / Device Role / Timing Role: High-common-mode difference amplifier performing level shift and attenuation simultaneously. Use Value: Input range up to V– + 76V allows direct interface to legacy ±15V instrumentation without external dividers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | Fixed G=20, 80V input range, 120dB CMRR, but no G=10/G=50 options or REF1/REF2 calibration pins | Optimized for unidirectional high-side sensing; lacks flexible gain selection and bipolar reference capability | Select when only 20× gain is needed and highest CMRR is critical; not suitable for multi-gain or offset-calibrated designs |
| AD8479ARZ | Fixed G=1, 600V input range, 120dB CMRR, but 1.5mA supply current and 150kHz bandwidth limit speed | Targeted at ultra-high-voltage isolation replacement; too slow and power-hungry for fast motor control | Select for >100V bus monitoring where bandwidth <200kHz suffices; avoid when gain flexibility or low power is required |
Compared with INA240A1IDR and AD8479ARZ, LT1997IMS-1#PBF uniquely combines pin-selectable 10/20/50 gain, sub-0.015% error, and 650kHz bandwidth in an MSOP-16 package - making it optimal for compact, multi-range industrial current monitors requiring both precision and configurability.
Availability
LT1997IMS-1#PBF is available at Aetrix Electronics and suitable for industrial motor control, renewable energy inverters, and programmable logic controller (PLC) analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1997IMS-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 LT1997-1 product line was designed specifically for precision current sensing in harsh industrial environments - delivering wide common-mode range, laser-trimmed gain accuracy, and robust thermal performance in compact MSOP and DFN packages.
FAQ
What is the maximum input common-mode voltage for LT1997IMS-1#PBF?
The LT1997IMS-1#PBF supports an input common-mode voltage range from V– to V– + 76V, independent of the V+ supply voltage. This allows direct connection to high-voltage buses up to 60V DC without external attenuation, as verified in the Absolute Maximum Ratings and Electrical Characteristics tables for the MS16 package.
Does LT1997IMS-1#PBF require external resistors to set gain?
No, LT1997IMS-1#PBF does not require external resistors to set gain. It integrates laser-trimmed thin-film resistors for three fixed gain options (10, 20, 50 V/V), selected by connecting the signal to the corresponding +INx/–INx pin pair. This eliminates gain-setting errors and board space associated with discrete resistor networks.
What is the guaranteed gain error specification for LT1997IMS-1#PBF at G=10?
The LT1997IMS-1#PBF guarantees a maximum gain error of ±0.012% (120ppm) at G=10 over the full –40°C to +85°C operating temperature range, as specified in the Electrical Characteristics table for the MS16 package under "∆G Gain Error" with the "l" symbol denoting full-temperature coverage.
How does the SHDN pin function on LT1997IMS-1#PBF?
The SHDN pin on LT1997IMS-1#PBF places the amplifier in low-power shutdown mode when pulled ≥2.5V below V+ (e.g., to V–), reducing supply current to 20µA max. When left floating or tied to V+, the device operates normally with 350µA typical supply current - enabling simple hardware-controlled power gating.
Is LT1997IMS-1#PBF compatible with single-supply operation?
Yes, LT1997IMS-1#PBF supports single-supply operation from 3.3V to 50V total supply range. It functions with V– = 0V and V+ = 3.3V–50V, and its rail-to-rail output and Over-The-Top® input stage allow input signals referenced to ground while maintaining full common-mode rejection - confirmed in the Applications Information section.
LT1997IMS-1#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:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 300 kHz
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 350µA
- Current - Output / Channel:
- 34 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-1#PBF FAQ
1.How can I place an order for LT1997IMS-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1997IMS-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 LT1997IMS-1#PBF reliable?
The price and inventory of LT1997IMS-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 LT1997IMS-1#PBF is usually 5 days.
3.What payment methods are accepted for LT1997IMS-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1997IMS-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1997IMS-1#PBF?
LT1997IMS-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1997IMS-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 LT1997IMS-1#PBF?
For technical support, including LT1997IMS-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1997IMS-1#PBF requirements.
6.How does Aetrix verify that LT1997IMS-1#PBF is sourced from the original manufacturer or authorized distributors?
All LT1997IMS-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 LT1997IMS-1#PBF meets industry standards.
7.What is the process for return or replacement of LT1997IMS-1#PBF?
All LT1997IMS-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1997IMS-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 LT1997IMS-1#PBF part is unused and in its original packaging.
Return procedure for LT1997IMS-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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