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Analog Devices Inc. LTC1992IMS8#TRPBF
- Part No.:
- LTC1992IMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1992IMS8#TRPBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,095
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Product details
Overview
LTC1992IMS8#TRPBF from Analog Devices (formerly Linear Technology) is an unconstrained fully differential amplifier optimized for single-ended-to-differential conversion, level shifting, and precision differential signal conditioning. It delivers ±0.3% max gain error over –40°C to 85°C, rail-to-rail 10mA output drive, and stable operation with capacitive loads up to 10,000pF - enabling robust interface between legacy single-supply systems and modern differential ADCs or high-speed data converters.
For engineers reviewing the LTC1992IMS8#TRPBF datasheet, LTC1992IMS8#TRPBF pinout, LTC1992IMS8#TRPBF application, or LTC1992IMS8#TRPBF equivalent, this device is selected when precise common-mode control, low distortion (<–85dB output balance), and wide supply range (2.7V single or ±5V dual) are required in instrumentation, medical imaging front-ends, and industrial sensor signal chains.
Technical Context
The LTC1992IMS8#TRPBF implements a fully differential architecture with independent internal common-mode feedback, enabling exceptional output phase matching and <–85dB second-harmonic suppression. Its VOCM pin sets output common-mode voltage independently of input common-mode, supporting seamless level translation across mixed-supply domains.
It operates with rail-to-rail inputs (–VS to +VS – 1.3V) and outputs (±10mA drive), features 2.5MHz gain-bandwidth product at unity gain, and maintains stability without external compensation up to 10nF load capacitance - eliminating need for isolation resistors in high-capacitance routing scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7V single or ±5V dual - supports direct integration into battery-powered and industrial dual-rail systems without level-shifting circuitry. |
| Gain Accuracy | ±0.3% max over –40°C to 85°C - ensures consistent signal scaling in temperature-varying environments like motor drives and outdoor sensors. |
| Output Drive | ±10mA min rail-to-rail - drives 50Ω transmission lines, 10kΩ ADC inputs, and 10,000pF PCB traces without external buffers. |
| Common-Mode Control | VOCM pin sets output common mode from (–VS + 0.5V) to (+VS – 1.3V) - enables precise alignment with ADC reference midpoints (e.g., 1.25V, 2.5V, or VDD/2). |
| Input Offset | ±2.5mV max (input-referred) - preserves DC accuracy in low-level sensor amplification (e.g., strain gauges, thermopiles) without trimming. |
| Stability | Unconditionally stable with CL ≤ 10,000pF - eliminates need for series output resistors in high-impedance probe interfaces or long cable runs. |
| Quiescent Current | 1.0mA max - enables use in always-on monitoring nodes where power budget is constrained to <10mW at 5V. |
Pinout & Package
Package: 8-Lead Plastic MSOP (3mm × 3mm, 0.65mm pitch), rated for –40°C to 85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN) | Inverting differential input | Accepts rail-to-rail input signals; combined with +IN forms fully differential input pair referenced to system ground or floating node. |
| 2 (VOCM) | Output common-mode control | Directly programs output midpoint voltage (e.g., 2.5V for 5V ADCs); high-impedance (500MΩ) input minimizes loading on reference dividers. |
| 3 (+VS) | Positive supply | Supports 2.7V to 11V single supply or +VS in dual-rail configuration; decoupling required within 1cm for noise-sensitive applications. |
| 4 (+OUT) | Positive differential output | Delivers amplified, phase-matched output; sinks/sources 10mA; requires matched trace length to –OUT for optimal CMRR. |
| 5 (+IN) | Non-inverting differential input | Complements –IN; both inputs share same common-mode range and offset specs; used with external resistor networks for gain setting if needed. |
| 6 (VMID) | Internal bias reference | Provides 2.50V ±60mV (typ) internal reference; not intended for external connection - leave unconnected or bypass to ground via 0.1μF. |
| 7 (–VS) | Negative supply | Ground (0V) for single supply or negative rail (e.g., –5V) for dual supply; must be low-impedance to maintain PSRR >75dB. |
| 8 (–OUT) | Negative differential output | Complementary to +OUT; identical drive capability and voltage swing; critical for maintaining <0.3% gain error and <–85dB output balance. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Eliminates even-order harmonics and common-mode noise pickup - essential for high-fidelity data acquisition in ECG, ultrasound, and precision DAQ. |
| Adjustable output common-mode (VOCM) | Enables direct interfacing to differential-input ADCs with varying reference voltages (1.25V, 2.048V, 2.5V, 4.096V) without external level-shifting components. |
| Rail-to-rail input/output swing | Maximizes dynamic range utilization in low-voltage systems (e.g., 2.7V battery rails), delivering >98% of full-scale output swing at 10mA load. |
| Capacitive-load stability up to 10,000pF | Supports direct connection to long PCB traces, coaxial cables, or LCD column drivers without added isolation resistors or compensation networks. |
| Low 1mA quiescent current | Reduces thermal drift and self-heating in densely packed modules - critical for multi-channel sensor arrays requiring thermal uniformity. |
| ±0.3% max gain error over temperature | Removes need for per-channel calibration in 16-bit+ systems; simplifies BOM by avoiding external trim resistors or digital correction firmware. |
Applications
| Medical Instrumentation | Industrial Sensor Signal Chain |
|---|---|
|
Use Scenario: Amplifying low-amplitude biopotential signals (ECG, EEG) before digitization by a 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Fully differential driver that rejects 50/60Hz mains interference while preserving microvolt-level signal integrity. Use Value: Achieves >110dB CMRR and <–100dB THD+N at 1kHz due to matched internal feedback paths and ultralow offset drift (10μV/°C). |
Use Scenario: Converting single-ended 4–20mA loop outputs or RTD bridge signals into differential format for isolated ADCs. IC Role / Device Role / Timing Role: Precision level-shifting amplifier that translates 0–5V industrial signals to ±2.5V differential pairs aligned with isolated ADC common-mode requirements. Use Value: VOCM pin enables exact 2.5V output centering; ±10mA drive handles 500Ω loop impedance and 1000pF isolation barrier capacitance without instability. |
| Test & Measurement Equipment | Communications Baseband Processing |
|
Use Scenario: Driving high-resolution oscilloscope or spectrum analyzer inputs requiring balanced, low-noise stimulus signals. IC Role / Device Role / Timing Role: Low-distortion differential driver ensuring flat frequency response (±0.1dB to 100kHz) and minimal group delay variation. Use Value: 2.5MHz GBW and <0.3% gain error enable accurate amplitude calibration across multiple decades of frequency without gain-dependent skew. |
Use Scenario: Conditioning baseband I/Q signals prior to upconversion in software-defined radio (SDR) transceivers. IC Role / Device Role / Timing Role: Matched-gain differential amplifier maintaining phase coherence between I and Q paths for <0.1° quadrature error. Use Value: Trimmed phase response and <–85dB output balance suppress image tones; rail-to-rail swing maximizes SNR in 12-bit DAC-driven systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8138ARMZ | Higher bandwidth (350MHz vs 2.5MHz), fixed gain = 1, no VOCM pin - requires external resistive network for gain adjustment and common-mode setting. | Better suited for high-speed video or RF IF applications; lacks integrated level-shifting capability for low-frequency sensor interfaces. | Select AD8138ARMZ only when >100MHz small-signal bandwidth is required; LTC1992IMS8#TRPBF remains preferred for DC-coupled, low-power, programmable-common-mode designs. |
| THS4561IRGET | Lower quiescent current (0.75mA vs 1.0mA), higher slew rate (30V/μs vs 1.5V/μs), but specified only to 85°C (not extended industrial temp). | Optimized for portable test gear with tight power budgets; lacks guaranteed performance at 125°C and has tighter layout sensitivity due to higher speed. | Choose THS4561IRGET for battery-powered handheld instruments; LTC1992IMS8#TRPBF is superior for fixed-installation industrial systems requiring –40°C to 85°C guarantee and robust 10,000pF load tolerance. |
Compared with AD8138ARMZ and THS4561IRGET, the LTC1992IMS8#TRPBF uniquely combines programmable VOCM, ultra-stable gain over temperature, and unconditional capacitive-load stability - making it the optimal choice for precision, low-frequency, mixed-supply signal conditioning where layout simplicity and calibration-free operation are critical.
Availability
LTC1992IMS8#TRPBF is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal chains, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and guaranteed –40°C to 85°C performance.
Supply support for LTC1992IMS8#TRPBF 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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs with rigorous process control and application-focused design.
The LTC1992IMS8#TRPBF belongs to Linear's precision differential amplifier family, engineered specifically for DC-coupled, low-distortion signal conditioning in sensor interfaces, data acquisition, and mixed-signal systems demanding rail-to-rail operation and programmable common-mode control.
FAQ
What supply voltage ranges does the LTC1992IMS8#TRPBF support?
The LTC1992IMS8#TRPBF operates from a single 2.7V to 11V supply or dual ±2.7V to ±5V supplies. At minimum 2.7V, it maintains rail-to-rail input/output swing and full functionality - enabling direct use in Li-ion battery-powered systems without boost regulators. Absolute maximum total supply voltage is 12V.
How does the VOCM pin function in the LTC1992IMS8#TRPBF?
The VOCM pin on the LTC1992IMS8#TRPBF directly sets the output common-mode voltage (VOUTCM) independent of input common-mode level. Applying a voltage between (–VS + 0.5V) and (+VS – 1.3V) to VOCM forces (+VOUT + –VOUT)/2 to match that value - enabling precise alignment with differential ADC reference midpoints without external resistive dividers or op-amp buffers.
Is the LTC1992IMS8#TRPBF stable with large capacitive loads?
Yes, the LTC1992IMS8#TRPBF is unconditionally stable driving capacitive loads up to 10,000pF without external compensation. This is verified across all supply conditions (2.7V, 5V, ±5V) and temperature (–40°C to 85°C). The internal compensation eliminates need for series output resistors, simplifying PCB layout for high-impedance probes, long traces, or capacitive isolation barriers.
What is the guaranteed gain accuracy of the LTC1992IMS8#TRPBF over temperature?
The LTC1992IMS8#TRPBF guarantees ±0.3% maximum differential gain error over the full –40°C to 85°C operating temperature range. This specification includes contributions from initial tolerance, temperature coefficient (3.5ppm/°C), and long-term drift (5ppm), ensuring predictable scaling in uncalibrated systems such as multi-channel sensor arrays or factory-set instrumentation.
Can the LTC1992IMS8#TRPBF be used in single-ended input configurations?
Yes, the LTC1992IMS8#TRPBF supports single-ended-to-differential conversion by grounding one input (e.g., –IN) and applying signal to the other (+IN), while setting VOCM to the desired output midpoint. This configuration is explicitly validated in the datasheet (Figure TA01a) and maintains >69dB CMRR and <±2.5mV offset - making it ideal for upgrading legacy single-ended sensor interfaces to differential data acquisition paths.
LTC1992IMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 3.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 700µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC1992IMS8#TRPBF FAQ
1.How can I place an order for LTC1992IMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1992IMS8#TRPBF 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 LTC1992IMS8#TRPBF reliable?
The price and inventory of LTC1992IMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1992IMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1992IMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1992IMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1992IMS8#TRPBF?
LTC1992IMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1992IMS8#TRPBF 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 LTC1992IMS8#TRPBF?
For technical support, including LTC1992IMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1992IMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1992IMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1992IMS8#TRPBF 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 LTC1992IMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1992IMS8#TRPBF?
All LTC1992IMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1992IMS8#TRPBF, 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 LTC1992IMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1992IMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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