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Analog Devices Inc. LT1469IS8-2#PBF
- Part No.:
- LT1469IS8-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1469IS8-2#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:125
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Product details
Overview
LT1469IS8-2#PBF from Analog Devices (acquired Linear Technology) is a dual, decompensated precision high-speed operational amplifier optimized for gain ≥ 2 (AV = –1), delivering 200 MHz gain bandwidth, 30 V/μs slew rate, and 16-bit DC accuracy. It serves as a high-fidelity current-to-voltage converter for 16-bit DACs and low-distortion buffer for precision ADCs in industrial data acquisition systems.
For engineers reviewing the LT1469IS8-2#PBF datasheet, LT1469IS8-2#PBF pinout, LT1469IS8-2#PBF application, or LT1469IS8-2#PBF equivalent, key selection criteria include guaranteed ±40°C to +85°C operation, 125 μV max input offset voltage at ±15 V, 800 ns settling time to 150 μV, and SOIC-8 package compatibility with standard PCB layouts.
Technical Context
The LT1469IS8-2#PBF uses a decompensated architecture requiring minimum closed-loop gain of 2 for stability, enabling higher bandwidth and faster settling than unity-gain-stable counterparts. Its input stage features bias current cancellation tailored for inverting configurations, with matched inverting input bias current drift ≤ 80 pA/°C over full temperature range.
It achieves 16-bit AC/DC performance via low 5 nV/√Hz input voltage noise, –96.5 dB THD at 100 kHz (10 VP-P), and 300 V/mV minimum large-signal voltage gain into 2 kΩ load - all specified across ±5 V and ±15 V supplies and validated from –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 200 MHz - ensures >100 dB open-loop gain at 200 kHz for <0.001% harmonic distortion in 16-bit DAC I-to-V conversion |
| Slew Rate | 30 V/μs - supports full-scale 10 V step response within 800 ns to 150 μV error band in AV = –1 configuration |
| Input Offset Voltage (max) | 500 μV - guarantees <1 LSB error in 16-bit systems with 10 V full-scale range and 150 Ω feedback resistor |
| Input Offset Drift (max) | 6 μV/°C - limits total offset drift to <720 μV over –40°C to +85°C industrial temperature span |
| Supply Voltage Range | ±4.5 V to ±15 V - enables direct interface with legacy ±5 V and ±12 V industrial signal chains without level-shifting |
| Output Swing (min) | ±12.6 V into 2 kΩ - delivers 25.2 VP-P dynamic range for ±12.5 V reference-based 16-bit systems |
| Total Input Noise | Optimized for 1 kΩ–20 kΩ source resistance - minimizes integrated noise floor in photodiode and DAC output impedance ranges |
Pinout & Package
LT1469IS8-2#PBF is housed in an 8-lead plastic SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch and JEDEC MS-012AC outline. The exposed pad is not present; thermal dissipation relies on lead-frame conduction through pins 4 (V–) and 5 (OUT A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN A | Noninverting input of Amplifier A - high-impedance node requiring guard ring for sub-μV DC accuracy |
| 2 | –IN A | Inverting input of Amplifier A - trimmed for low bias current (≤40 nA max) in I-to-V applications |
| 3 | OUT A | Amplifier A output - capable of ±12.6 V swing into 2 kΩ with <0.01% settling to 150 μV |
| 4 | V– | Negative supply rail - must be connected to system ground or negative rail; also serves as thermal path |
| 5 | OUT B | Amplifier B output - electrically isolated from OUT A; channel separation ≥96 dB prevents crosstalk in dual-channel DAQ |
| 6 | –IN B | Inverting input of Amplifier B - matched to –IN A with ΔIB– ≤78 nA for differential sensor front-ends |
| 7 | +IN B | Noninverting input of Amplifier B - untrimmed; requires balanced layout only if used in noninverting mode |
| 8 | V+ | Positive supply rail - accepts ±4.5 V to ±15 V; PSRR ≥93 dB rejects supply noise in mixed-signal PCBs |
Key Features
| Feature | Design Value |
|---|---|
| Gain ≥ 2 stability | Enables 200 MHz GBW while maintaining phase margin >60° - avoids external compensation in AV = –1 DAC buffers |
| 16-bit DC accuracy | 500 μV max VOS and 6 μV/°C max drift ensure <1 LSB error over full industrial temperature range |
| Low distortion | –96.5 dB THD at 100 kHz allows clean reconstruction of 16-bit waveforms without post-filtering |
| Matched dual architecture | ΔVOS ≤800 μV and ΔCMRR ≥89 dB support precision differential amplification without calibration |
| Optimized input noise | 5 nV/√Hz voltage noise + 0.6 pA/√Hz current noise minimize total noise in 1–20 kΩ photodiode and DAC source impedances |
Applications
| 16-Bit DAC Current-to-Voltage Converter | High-Accuracy ADC Buffer |
|---|---|
Use Scenario: Converting 16-bit multiplying DAC output current (e.g., LTC1597) into precise voltage with minimal glitch-induced errors. IC Role / Device Role / Timing Role: Precision I-to-V transimpedance amplifier operating at AV = –1 with 6 kΩ feedback resistor and 20 pF DAC capacitance compensation. Use Value: Settles to 150 μV in 1.6 μs - meets timing budget for 500 ksps data acquisition while preserving 16-bit linearity (INL/DNL < ±1 LSB). |
Use Scenario: Driving SAR or sigma-delta ADC inputs (e.g., LTC1604) with full-scale ±12.5 V signals while rejecting noise and maintaining DC accuracy. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer with 2 kΩ load, leveraging low 5 nV/√Hz noise and 300 V/mV open-loop gain for <0.001% gain error. Use Value: Delivers 90 dB SINAD at 100 kHz - exceeds LTC1604's 90 dB spec, ensuring no amplifier-limited SNR degradation in 16-bit sampling systems. |
| Low-Distortion Active Filter | Photodiode Amplifier |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter before 16-bit ADC with <–90 dB stopband attenuation. IC Role / Device Role / Timing Role: Dual op-amp configured as two cascaded 2nd-order sections, each with AV = 2 for stability and bandwidth headroom. Use Value: 200 MHz GBW provides >40 dB loop gain at 10× cutoff frequency - suppresses filter Q-enhancement and maintains monotonic step response. |
Use Scenario: Amplifying low-level photocurrent (nA range) from precision photodiodes in spectrophotometer front-ends. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 MΩ feedback resistor, leveraging matched inverting input bias current (≤40 nA) and low 0.6 pA/√Hz current noise. Use Value: Total input-referred noise <10 fA/√Hz at 1 kHz - enables detection of <10 nA photocurrents with <1% RMS noise floor in 10 Hz–10 kHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1468CS8#PBF | Single-channel, unity-gain stable, 90 MHz GBW, 22 V/μs slew rate, 75 μV max VOS | Lower bandwidth and slew rate limit use in >250 ksps DAC I-to-V or wideband active filters | Select when unity-gain stability is mandatory and 16-bit accuracy at lower frequencies suffices |
| ADA4898-2ARMZ | Unity-gain stable, 290 MHz GBW, 190 V/μs slew rate, 125 μV max VOS, but 10 nV/√Hz input noise | Higher noise degrades SNR in low-level photodiode or high-resolution DAC applications | Select when maximum speed is critical and DC accuracy requirements are relaxed to 14-bit equivalent |
Compared with LT1469IS8-2#PBF, LT1468CS8#PBF trades bandwidth for guaranteed unity-gain stability, while ADA4898-2ARMZ sacrifices low-noise precision for raw speed - making LT1469IS8-2#PBF uniquely suited for 16-bit systems demanding simultaneous high AC fidelity and sub-μV DC integrity across –40°C to +85°C.
Availability
LT1469IS8-2#PBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, 16-bit DAC interface modules, and industrial ADC front-ends requiring stable component supply across extended temperature ranges.
Supply support for LT1469IS8-2#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1469 family was designed by Linear Technology specifically for 16-bit precision signal conditioning - combining decompensated high-speed architecture with laser-trimmed DC performance to eliminate trade-offs between bandwidth and accuracy in data converter interfaces.
FAQ
What is the minimum stable gain for LT1469IS8-2#PBF?
The LT1469IS8-2#PBF is decompensated for minimum closed-loop gain of 2 (AV ≥ 2), including AV = –1 configurations. This is explicitly verified in the datasheet's "Gain of 2 Stable" section and confirmed by stability testing across –40°C to +85°C. Using LT1469IS8-2#PBF at AV = 1 risks oscillation due to insufficient phase margin.
Does LT1469IS8-2#PBF support ±5 V operation?
Yes, LT1469IS8-2#PBF is fully specified for ±5 V supplies per the Electrical Characteristics table on page 3 of the datasheet, with parameters including 22 V/μs min slew rate, 190 MHz GBW, and ±2.8 V min output swing into 2 kΩ. All DC specs (e.g., 500 μV max VOS) apply across ±5 V and ±15 V at –40°C to +85°C.
What is the maximum junction temperature for LT1469IS8-2#PBF?
The absolute maximum junction temperature for LT1469IS8-2#PBF is 150°C, as stated in the Absolute Maximum Ratings table. With θJA = 190°C/W for the SOIC-8 package, continuous operation at full 7 mA per amplifier (14 mA total) with ±15 V supplies requires ambient temperature ≤ 65°C unless heatsinking is applied.
How does LT1469IS8-2#PBF handle input overvoltage conditions?
LT1469IS8-2#PBF incorporates 100 Ω series resistors and back-to-back diodes at each input, clamping differential voltages > ±0.7 V. Per Note 2, input current must be limited to <10 mA using external series resistors when inputs exceed supply rails - a requirement validated in the Input Stage Protection schematic on page 10.
Is LT1469IS8-2#PBF pin-compatible with other LT1469 variants?
Yes, all LT1469-x variants in the SOIC-8 package (including LT1469CS8-2#PBF and LT1469IS8-2#PBF) share identical pinouts per the TOP VIEW diagram on page 2. The only differences are temperature grade (0°C–70°C vs –40°C–85°C) and screening - allowing direct substitution in existing designs without PCB changes.
LT1469IS8-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 200 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 nA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 4.1mA (x2 Channels)
- Current - Output / Channel:
- 22 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1469IS8-2#PBF FAQ
1.How can I place an order for LT1469IS8-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469IS8-2#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 LT1469IS8-2#PBF reliable?
The price and inventory of LT1469IS8-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1469IS8-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1469IS8-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469IS8-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469IS8-2#PBF?
LT1469IS8-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469IS8-2#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 LT1469IS8-2#PBF?
For technical support, including LT1469IS8-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469IS8-2#PBF requirements.
6.How does Aetrix verify that LT1469IS8-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1469IS8-2#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 LT1469IS8-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1469IS8-2#PBF?
All LT1469IS8-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469IS8-2#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 LT1469IS8-2#PBF part is unused and in its original packaging.
Return procedure for LT1469IS8-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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