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Analog Devices Inc. LT1997HMS-2#PBF
- Part No.:
- LT1997HMS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads
- Datasheet:
-
LT1997HMS-2#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,411
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Product details
Overview
LT1997HMS-2#PBF from Analog Devices is a precision funnel (attenuating difference) amplifier with pin-selectable gains of 0.1, 0.2, or 0.25, ±255V input common-mode voltage range, 105dB minimum CMRR at G=0.1, 0.006% max gain error, and rail-to-rail output - designed for high-voltage industrial current/voltage sensing and ADC driver applications.
For engineers reviewing the LT1997HMS-2#PBF datasheet, LT1997HMS-2#PBF pinout, LT1997HMS-2#PBF application, or LT1997HMS-2#PBF equivalent, this page delivers verified specifications, MSOP-16 package layout, functional alternatives, and design-critical performance data including gain nonlinearity (<2ppm), temperature drift (±1ppm/°C), and shutdown current (20µA).
Technical Context
The LT1997HMS-2#PBF integrates a precision op amp with laser-trimmed, thermally matched thin-film resistors to form a monolithic attenuating difference amplifier. Its internal resistor network enables three discrete gain settings without external components, and maintains <1ppm/°C gain drift across –40°C to 125°C.
It operates from single or dual supplies (3.3V to 50V total), supports ±255V common-mode inputs via Over-The-Top® internal op amp architecture, and achieves >105dB CMRR by leveraging matched resistor ratios and low-offset op amp topology - critical for high-side sensing in motor drives and power converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Pin-selectable 0.1, 0.2, or 0.25 - enables direct attenuation of high-voltage differential signals into 5V ADC input ranges without external scaling. |
| CMRR (G=0.1) | ≥105dB - rejects common-mode noise from high-voltage bus measurements in industrial inverters and battery monitors. |
| Gain Error | ±0.006% (60ppm) - ensures sub-0.1% absolute accuracy in closed-loop current sensing over full temperature range. |
| Input CM Range | ±255V - supports direct connection to 480VAC line sensing, DC link monitoring, and isolation-replacement topologies. |
| Supply Range | 3.3V to 50V - accommodates wide-input industrial power rails and battery-powered portable test equipment. |
| Quiescent Current | 350µA active / 20µA shutdown - enables always-on monitoring with ultra-low standby power in energy metering systems. |
| Bandwidth (G=0.1) | 1MHz - supports accurate sampling of fast transients in motor phase current feedback loops. |
Pinout & Package
LT1997HMS-2#PBF is housed in a 16-lead plastic MSOP package (MS16), 4.0mm × 3.0mm footprint, 0.65mm pitch, with exposed pad connected to V– for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INA | Noninverting input for G=0.1 | Connects to 250kΩ internal resistor; used with –INA to configure 0.1× attenuation path. |
| +INB | Noninverting input for G=0.2 | Connects to 125kΩ internal resistor; pairs with –INB for 0.2× attenuation. |
| +INC | Noninverting input for G=0.25 | Connects to 100kΩ internal resistor; used with –INC for 0.25× attenuation. |
| –INA, –INB, –INC | Inverting inputs | Matched to respective +IN pins; enable differential input configuration per selected gain. |
| REF1 / REF2 | Reference divider inputs | Set output DC level when input difference = 0; support mid-supply or external reference biasing. |
| SHDN | Shutdown control | Active-high logic: ≥(V+ – 1.2V) enables, ≤(V+ – 2.5V) disables - reduces supply current to 20µA. |
| V+, V– | Power supply terminals | V+ accepts up to 60V above V–; exposed V– pad must be soldered for thermal reliability. |
| OUT | Analog output | Rail-to-rail swing (within 50mV of rails at 5mA load); drives 10kΩ loads directly into ADC inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Precision resistor matching | Guaranteed <0.009% matching error (90ppm) with <1ppm/°C TC - eliminates external trimming in high-accuracy shunt-based current sensing. |
| Over-The-Top® input stage | Supports VCMOP up to V– + 76V - enables operation with input voltages exceeding V+ supply, critical for high-side sensing in buck converters. |
| Low gain nonlinearity | <2ppm - preserves signal fidelity in precision metrology and calibration equipment where harmonic distortion must be minimized. |
| Wide supply flexibility | Operates from 3.3V single supply to ±25V dual supply - simplifies system-level power architecture across portable and industrial platforms. |
| Thermal robustness | Rated for –40°C to 125°C ambient; θJA = 130°C/W - suitable for under-hood automotive and factory-floor embedded controllers. |
Applications
| High-Voltage Motor Phase Current Sensing | Isolation-Free Battery Stack Monitoring |
|---|---|
Use Scenario: Measuring bidirectional current in 400V DC bus of an EV traction inverter using shunt resistor. IC Role / Device Role / Timing Role: Funnel amplifier translates ±200mV shunt voltage (±200A) to ±2V output for 16-bit SAR ADC. Use Value: ±255V CM range allows direct connection to high-side shunt without isolated amplifiers; 105dB CMRR suppresses PWM switching noise. | Use Scenario: Monitoring individual cell voltages across 96-cell Li-ion battery pack (0–400V total). IC Role / Device Role / Timing Role: Attenuates ±10V differential cell pair voltage to ±2.5V for microcontroller ADC input. Use Value: Pin-selectable G=0.25 enables precise 4× attenuation; 0.006% gain error ensures <0.1% SoC estimation accuracy. |
| Industrial PLC Analog Input Module | Energy Meter Voltage/Current Channel |
Use Scenario: Accepting ±10V, 0–20mA, or 4–20mA field signals in modular I/O rack. IC Role / Device Role / Timing Role: Configurable gain funnel amplifier conditions sensor outputs for multiplexed 24-bit sigma-delta ADC. Use Value: Single-chip solution replaces discrete op amp + resistor network; 350µA quiescent current supports low-power remote I/O nodes. | Use Scenario: High-accuracy voltage and current channel front-end in Class 0.2 revenue-grade electricity meter. IC Role / Device Role / Timing Role: Attenuates 230VAC line voltage (via resistive divider) and shunt current to match ADC full-scale range. Use Value: <2ppm gain nonlinearity prevents harmonic-induced measurement errors; 1ppm/°C drift meets IEC 62053 long-term stability requirements. |
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, higher offset (150µV), no shutdown | Better for ultra-high-CM (>400V) but lacks gain flexibility and low-power mode | Select when maximum common-mode tolerance is required and gain adjustment is unnecessary. |
| INA149AIDR | Fixed G=1, ±200V CM range, lower bandwidth (500kHz), higher supply current (1.2mA) | Suitable for cost-sensitive industrial sensors but cannot match LT1997HMS-2#PBF's 0.006% gain accuracy or 20µA shutdown | Choose for simpler designs where 0.1% gain error is acceptable and power budget permits higher quiescent draw. |
Compared with AD8479ARZ and INA149AIDR, the LT1997HMS-2#PBF uniquely combines pin-selectable attenuation, ±255V CM capability, sub-60ppm gain error, and 20µA shutdown - making it optimal for space-constrained, high-accuracy, low-power industrial sensing nodes requiring flexible gain configuration.
Availability
LT1997HMS-2#PBF is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and smart energy metering requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LT1997HMS-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, communications, automotive, and consumer markets.
The LT1997-2 product line was engineered specifically for high-accuracy, high-common-mode industrial signal conditioning - delivering integrated precision attenuation without external passive components or isolation barriers.
FAQ
What is the maximum input common-mode voltage supported by the LT1997HMS-2#PBF?
The LT1997HMS-2#PBF supports a guaranteed input common-mode voltage range of ±255V relative to V–, validated per Absolute Maximum Ratings and CMRR testing at ±255V with VS = ±25V. This enables direct interfacing to 480VAC lines and 400VDC bus systems without external level-shifting circuitry.
Does the LT1997HMS-2#PBF require external resistors to set gain?
No. The LT1997HMS-2#PBF integrates laser-trimmed thin-film resistors for three standard gains (0.1, 0.2, 0.25) and requires no external components to configure attenuation. Gain selection is accomplished solely by connecting the appropriate +IN/–IN pin pair - eliminating resistor matching errors and board area in precision sensing designs.
What is the operating temperature range for the LT1997HMS-2#PBF?
The LT1997HMS-2#PBF is rated for continuous operation from –40°C to +125°C ambient temperature, meeting the H-grade specification. It is fully characterized across this range for key parameters including gain error, CMRR, and supply current - ensuring reliability in under-hood automotive, factory automation, and outdoor energy infrastructure applications.
How does the shutdown function work on the LT1997HMS-2#PBF?
The SHDN pin on the LT1997HMS-2#PBF is active-high: the device operates normally when SHDN ≥ (V+ – 1.2V) or left floating, and enters low-power shutdown (IS = 20µA typical) when SHDN ≤ (V+ – 2.5V). No external pull-up is required, and the pin draws only ±15µA, enabling simple microcontroller GPIO control of LT1997HMS-2#PBF power state.
Can the LT1997HMS-2#PBF drive a 10kΩ load while maintaining rail-to-rail output swing?
Yes. The LT1997HMS-2#PBF delivers rail-to-rail output swing with ≤50mV headroom at 5mA load (equivalent to 1kΩ), and maintains full dynamic range into 10kΩ loads - confirmed by output voltage swing specifications (VOL = 50mV, VOH = 500mV at ISINK/ISOURCE = 5mA) and typical performance curves showing <10mV error at 10kΩ across temperature.
LT1997HMS-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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP
LT1997HMS-2#PBF FAQ
1.How can I place an order for LT1997HMS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1997HMS-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 LT1997HMS-2#PBF reliable?
The price and inventory of LT1997HMS-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 LT1997HMS-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1997HMS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1997HMS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1997HMS-2#PBF?
LT1997HMS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1997HMS-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 LT1997HMS-2#PBF?
For technical support, including LT1997HMS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1997HMS-2#PBF requirements.
6.How does Aetrix verify that LT1997HMS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1997HMS-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 LT1997HMS-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1997HMS-2#PBF?
All LT1997HMS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1997HMS-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 LT1997HMS-2#PBF part is unused and in its original packaging.
Return procedure for LT1997HMS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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