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Analog Devices Inc. LTC1992IMS8#PBF
- Part No.:
- LTC1992IMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1992IMS8#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,202
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Product details
Overview
LTC1992IMS8#PBF 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 in industrial and data acquisition systems. It delivers adjustable gain, ±0.3% max gain error over –40°C to 85°C, rail-to-rail output swing up to ±5V supplies, and stable operation with capacitive loads up to 10,000pF.
For engineers reviewing the LTC1992IMS8#PBF datasheet, LTC1992IMS8#PBF pinout, LTC1992IMS8#PBF application, or LTC1992IMS8#PBF equivalent, key selection criteria include its VOCM-controlled common-mode output level, low 1mA max supply current, 2.5MHz gain-bandwidth product, and guaranteed performance across –40°C to 85°C in the 8-lead MSOP package.
Technical Context
The LTC1992IMS8#PBF implements a fully differential architecture with independent internal common-mode feedback, enabling precise output phase balancing and reduced second-order harmonics. Its VOCM pin sets output common-mode voltage independently of input common-mode range, supporting seamless level translation between single-supply and dual-supply domains.
It operates from 2.7V single supply up to ±5V dual supply, accepts rail-to-rail differential inputs with input common-mode range from –VS to (+VS – 1.3V), and maintains stability without external compensation across all capacitive loads ≤10,000pF - a critical advantage for driving ADC drivers and high-impedance traces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to ±5V - supports both low-voltage portable and bipolar industrial signal chains |
| Max Supply Current | 1.0mA - enables battery-powered or thermally constrained designs |
| Gain-Bandwidth Product | 2.5MHz - sufficient for 100ksps–1Msps SAR ADC driver applications |
| Differential Offset Voltage | ±2.5mV max - ensures DC accuracy in precision sensor front-ends |
| Output Swing | Rail-to-rail, ±10mA min sourcing/sinking - drives 50Ω/100Ω differential lines or ADC inputs directly |
| CLOAD Stability | Stable up to 10,000pF - eliminates need for isolation resistors when driving long PCB traces or capacitive ADC inputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation and outdoor instrumentation |
Pinout & Package
Package: 8-lead plastic MSOP (3mm × 3mm), exposed pad, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN) | Inverting differential input | Accepts true differential or single-ended input referenced to VMID; supports rail-to-rail common-mode range |
| 2 (VOCM) | Output common-mode control | Sets (+VOUT + –VOUT)/2 independently; high-impedance (500MΩ) input enables precise DC level shift |
| 3 (+VS) | Positive supply | Connects to main positive rail; supports 2.7V to 11V total supply or ±5V dual supply |
| 4 (+OUT) | Positive differential output | Delivers rail-to-rail swing; capable of sourcing/sinking ≥10mA into matched loads |
| 5 (+IN) | Non-inverting differential input | Complements Pin 1; full differential pair enables rejection of even-order distortion |
| 6 (VMID) | Internal reference midpoint | Provides 2.50V ±60mV at 25°C; used as bias point for single-ended input configurations |
| 7 (–VS) | Negative supply | Connects to ground (single supply) or negative rail (dual supply); defines lower supply boundary |
| 8 (–OUT) | Negative differential output | Complementary to Pin 4; balanced output pair ensures <–60dB output imbalance up to 100kHz |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable gain architecture | No fixed resistors required - gain set by external feedback network, enabling flexible system-level scaling |
| VOCM-controlled output common mode | Enables level shifting between incompatible domains (e.g., 0–5V microcontroller to ±2.5V ADC) without AC coupling |
| Rail-to-rail input and output | Maximizes dynamic range in low-voltage systems (e.g., 2.7V supply yields >2.5Vpp differential output) |
| 10,000pF capacitive load stability | Eliminates need for series output resistors when driving long traces, filters, or ADC input capacitance (typically 10–30pF per input) |
| Low 1mA supply current | Reduces thermal load and power supply filtering requirements in multi-channel DAQ modules |
Applications
| Single-Ended to Differential Conversion | Differential ADC Driver |
|---|---|
Use Scenario: Converting output of a single-ended op-amp sensor interface (e.g., bridge amplifier) into a fully differential signal for a high-resolution SAR ADC. IC Role / Device Role / Timing Role: LTC1992IMS8#PBF acts as a precision gain-and-level-shift stage, rejecting common-mode noise while matching ADC input impedance and voltage range. Use Value: Achieves >90dB CMRR at DC and preserves THD+N <–80dB up to 10kHz due to trimmed phase response and low offset drift. | Use Scenario: Driving the differential inputs of a 16-bit+ SAR ADC (e.g., AD768x, LTC23xx) in an isolated data acquisition module. IC Role / Device Role / Timing Role: LTC1992IMS8#PBF provides low-noise, low-distortion buffering with precisely controlled output common mode aligned to ADC reference mid-point. Use Value: Enables full-scale utilization of ADC input range without clipping, while maintaining SNR >92dB via 35nV/√Hz input-referred noise and 2.5MHz GBW. |
| Level Shifting Interface | Multichannel Phase-Matched Signal Chain |
Use Scenario: Interfacing a 3.3V microcontroller's single-ended DAC output to a ±5V analog front-end requiring differential inputs. IC Role / Device Role / Timing Role: LTC1992IMS8#PBF translates 0–3.3V DAC output to a centered ±2.5V differential signal using VOCM = 0V and appropriate gain setting. Use Value: Eliminates AC coupling capacitors and associated low-frequency distortion, supporting DC-coupled precision control loops. | Use Scenario: Synchronizing multiple sensor channels (e.g., vibration monitoring array) where phase coherence across channels is critical for FFT-based analysis. IC Role / Device Role / Timing Role: LTC1992IMS8#PBF serves as matched-gain, low-phase-error buffer in each channel, leveraging internal common-mode feedback for <0.1° phase mismatch at 10kHz. Use Value: Reduces inter-channel phase error to <0.05° (typical), enabling accurate time-of-flight or beamforming calculations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561DR | Higher GBW (3.2GHz), higher supply current (12.5mA), no VOCM pin - output common mode fixed at VCC/2 | Better for RF/IF signal chains >10MHz; unsuitable for arbitrary level shifting or low-power DC-coupled systems | Select THS4561DR only when bandwidth >100MHz is required and VOCM flexibility is not needed. |
| ADA4941-1ARZ | Lower supply current (1.2mA), integrated resistor network (gain = 1 or 2), VOCM pin present, but CLOAD stable only to 100pF | Requires external RC isolation for ADC driving; better for low-noise, low-distortion audio or precision DC, not high-capacitance interfaces | Choose ADA4941-1ARZ when fixed gain and ultra-low noise (2.9nV/√Hz) outweigh CLOAD stability needs. |
Compared with THS4561DR and ADA4941-1ARZ, the LTC1992IMS8#PBF uniquely balances wide supply range (2.7V–±5V), 10,000pF load stability, VOCM flexibility, and sub-1mA quiescent current - making it optimal for industrial DAQ, isolated sensor interfaces, and multichannel synchronized acquisition where layout simplicity and power efficiency are critical.
Availability
LTC1992IMS8#PBF is available at Aetrix Electronics and suitable for industrial data acquisition, precision sensor signal conditioning, and multichannel instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC1992IMS8#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1992 family was designed by Linear Technology (acquired by ADI in 2017) specifically for precision, low-power, fully differential signal conditioning - targeting applications demanding rail-to-rail operation, VOCM control, and robust capacitive load drive without external compensation.
FAQ
What is the maximum capacitive load the LTC1992IMS8#PBF can drive without instability?
The LTC1992IMS8#PBF is specified stable for all capacitive loads up to 10,000pF across its full operating temperature range (–40°C to +85°C). This eliminates the need for series output resistors when driving long PCB traces, anti-aliasing filters, or high-input-capacitance ADCs - a key differentiator versus most competing fully differential amplifiers limited to ≤100pF.
Does the LTC1992IMS8#PBF require external gain-setting resistors?
Yes, the LTC1992IMS8#PBF is an unconstrained fully differential amplifier and requires external feedback and gain-setting resistors to define closed-loop gain and configuration (e.g., single-ended-to-differential, differential-to-differential). Unlike the fixed-gain LTC1992-X variants (e.g., LTC1992-1IMS8#PBF), it offers full design flexibility but does not include on-chip precision resistors.
What is the function of the VMID pin on the LTC1992IMS8#PBF?
The VMID pin on the LTC1992IMS8#PBF provides an internally generated reference voltage of 2.50V ±60mV (at 25°C), used as a bias point for single-ended input configurations. When converting single-ended signals, VMID is typically connected to the non-driven input (e.g., –IN) to establish the input common-mode level, ensuring optimal linearity and offset performance.
Can the LTC1992IMS8#PBF operate from a single 3.3V supply?
Yes, the LTC1992IMS8#PBF is fully specified for single-supply operation from 2.7V to 11V total supply voltage. With a 3.3V supply (VS+ = 3.3V, VS– = 0V), it delivers rail-to-rail output swing (≥3.1Vpp differential), supports input common-mode range from 0V to 2.0V, and maintains 1mA max supply current - making it ideal for low-voltage portable instrumentation.
How does the VOCM pin affect output common-mode voltage in the LTC1992IMS8#PBF?
The VOCM pin on the LTC1992IMS8#PBF directly sets the output common-mode voltage (VOUTCM = (+VOUT + –VOUT)/2) independently of input common-mode voltage. Applying a voltage between (–VS + 0.5V) and (+VS – 1.3V) to VOCM forces the outputs to center at that level - enabling precise level shifting, e.g., translating a 0–3.3V single-ended signal to a ±1.65V differential output with VOCM = 0V.
LTC1992IMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC1992IMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1992IMS8#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 LTC1992IMS8#PBF reliable?
The price and inventory of LTC1992IMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1992IMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1992IMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1992IMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1992IMS8#PBF?
LTC1992IMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1992IMS8#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 LTC1992IMS8#PBF?
For technical support, including LTC1992IMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1992IMS8#PBF requirements.
6.How does Aetrix verify that LTC1992IMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1992IMS8#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 LTC1992IMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1992IMS8#PBF?
All LTC1992IMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1992IMS8#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 LTC1992IMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1992IMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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