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Analog Devices Inc. LT1469CS8#PBF
- Part No.:
- LT1469CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1469CS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,269
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Product details
Overview
LT1469CS8#PBF from Analog Devices (acquired Linear Technology) is a dual precision high-speed operational amplifier optimized for 16-bit data acquisition systems. It delivers 90 MHz gain bandwidth, 22 V/µs slew rate, and 900 ns settling to 150 µV for 10 V steps - enabling high-fidelity DAC current-to-voltage conversion and ADC buffering in ±5 V or ±15 V supplies.
For engineers reviewing the LT1469CS8#PBF datasheet, LT1469CS8#PBF pinout, LT1469CS8#PBF application, or LT1469CS8#PBF equivalent, this device is selected when simultaneous DC accuracy (≤125 µV VOS, ≤3 µV/°C drift), low distortion (–96.5 dB THD at 100 kHz), and fast large-signal response are required in space-constrained industrial and test equipment designs.
Technical Context
The LT1469CS8#PBF employs a single-stage, unity-gain-stable architecture with bias current cancellation tailored for inverting configurations - minimizing errors in DAC I-to-V converters. Its input stage supports rail-to-rail common-mode range (±12.5 V on ±15 V supplies) and features 100 Ω series resistors plus back-to-back diodes for robust input protection.
DC performance is enhanced by matched input offset voltage (≤225 µV max match), while AC fidelity relies on low 5 nV/√Hz voltage noise and 0.6 pA/√Hz current noise - optimized for source impedances between 1 kΩ and 20 kΩ. The 90 MHz GBW ensures >100 dB open-loop gain at 100 kHz, reducing harmonic distortion in noninverting ADC buffer roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 90 MHz at ±15 V - sustains ≥100 dB loop gain up to 100 kHz for low-distortion signal conditioning. |
| Slew Rate | 22 V/µs at ±15 V - enables full-scale 10 V step response within 450 ns, critical for active filter and instrumentation amplifier linearity. |
| Input Offset Voltage | Max 125 µV at ±15 V - ensures ≤0.002% error in 16-bit (65,536-step) DAC output scaling over temperature. |
| Settling Time | 900 ns to 150 µV (0.0023% of 10 V) - meets 16-bit settling requirement without post-processing correction. |
| Total Harmonic Distortion | –96.5 dB at 100 kHz, 10 VP-P - preserves spectral purity in audio and precision waveform generation paths. |
| Input Noise Density | 5 nV/√Hz voltage noise + 0.6 pA/√Hz current noise - minimizes integrated noise in 1 kΩ–20 kΩ sensor interface applications. |
| Supply Range | ±2.5 V to ±15 V - operates from low-voltage portable systems to high-dynamic-range industrial front-ends. |
Pinout & Package
LT1469CS8#PBF uses an 8-lead plastic small-outline (SO-8) package with standard pinout and JEDEC MS-012AC footprint. Exposed pad is not present - thermal dissipation relies on PCB copper area under leads.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V– | Negative supply rail connection - must be decoupled with 0.1 µF ceramic + 10 µF tantalum near pin. |
| 2 | –IN A | Inverting input of Amplifier A - biased with trimmed current for minimal error in I-to-V applications. |
| 3 | +IN A | Noninverting input of Amplifier A - untrimmed; requires guard ring for microvolt-level DC stability. |
| 4 | OUT A | Amplifier A output - drives loads down to 2 kΩ with ±12.8 V swing on ±15 V supplies. |
| 5 | OUT B | Amplifier B output - independent channel; enables dual-path signal conditioning without crosstalk degradation. |
| 6 | –IN B | Inverting input of Amplifier B - identical trimming and bias characteristics as Pin 2. |
| 7 | +IN B | Noninverting input of Amplifier B - matches Pin 3 behavior; differential pair symmetry critical for channel matching. |
| 8 | V+ | Positive supply rail connection - shared rail for both amplifiers; PSRR ≥ 112 dB suppresses supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit settling performance | 900 ns to 150 µV on 10 V step - eliminates need for digital post-correction in high-resolution DAC interfaces. |
| Optimized total input noise | Minimum integrated noise at RS = 1 kΩ–20 kΩ - maximizes SNR in photodiode and strain gauge amplifiers. |
| Inverting-input bias current trim | ≤10 nA max at ±15 V - reduces offset error in transimpedance configurations without external compensation. |
| Unity-gain stable operation | No external compensation required for AV = 1 - simplifies design of ADC buffers and voltage followers. |
| High channel separation | ≥100 dB at 100 kHz - prevents inter-channel crosstalk in dual-channel data acquisition and balanced audio drivers. |
Applications
| 16-Bit DAC Current-to-Voltage Converter | ADC Input Buffer |
|---|---|
Use Scenario: Converting 16-bit current-output DAC (e.g., LTC1597) into precise bipolar voltage output (±10 V). IC Role / Device Role / Timing Role: Transimpedance amplifier with 12 kΩ feedback resistor and 15 pF nulling capacitor for optimal 2.4 µs 16-bit settling. Use Value: Eliminates DAC output capacitance-induced peaking; achieves full 16-bit accuracy without calibration. |
Use Scenario: Driving SAR or sigma-delta ADC inputs in high-speed data loggers requiring DC accuracy and low THD. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer with 0.002% gain error and –96.5 dB THD at 100 kHz. Use Value: Preserves 16-bit ENOB across full bandwidth; avoids aperture jitter degradation from source impedance mismatch. |
| Low-Distortion Active Filter | Photodiode Amplifier |
Use Scenario: 4th-order Butterworth anti-aliasing filter in medical imaging front-end with 100 kHz cutoff. IC Role / Device Role / Timing Role: Dual op-amp implementing two 2nd-order stages - one per LT1469 channel. Use Value: Maintains <0.01% THD across passband; 90 MHz GBW ensures flat group delay up to 100 kHz. |
Use Scenario: Low-noise transimpedance amplifier for 1 nA–10 µA photodiode signals in spectrophotometers. IC Role / Device Role / Timing Role: Inverting amplifier with 1 MΩ feedback resistor and 5 pF compensation. Use Value: 5 nV/√Hz input noise dominates only above 10 kΩ source resistance - maximizes SNR at typical photodiode RS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211IDR | Lower 1.1 nV/√Hz noise but 45 MHz GBW and 27 V/µs slew rate; VOS max 100 µV at 25°C only. | Better for ultra-low-noise DC-critical sensors; insufficient GBW for 100 kHz THD-sensitive filtering. | Select OPA211IDR only if noise dominates over bandwidth and settling requirements. |
| ADA4898-2ARMZ | Higher 800 MHz GBW and 275 V/µs slew rate but 250 µV VOS max and no guaranteed 16-bit settling spec. | Superior for RF/IF signal chains; lacks verified 900 ns 16-bit settling and low-frequency CMRR >110 dB. | Choose ADA4898-2ARMZ for wideband AC-coupled applications where DC accuracy is secondary. |
Compared with OPA211IDR and ADA4898-2ARMZ, the LT1469CS8#PBF uniquely balances verified 16-bit settling time, 90 MHz bandwidth, and sub-125 µV offset across temperature - making it the only option qualified for calibrated 16-bit DAC I-to-V conversion without post-fabrication trimming.
Availability
LT1469CS8#PBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, precision instrumentation front-ends, and industrial DAC/ADC interface modules requiring stable component supply across extended production lifecycles.
Supply support for LT1469CS8#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs for precision signal conditioning.
The LT1469CS8#PBF belongs to Linear Technology's precision high-speed op amp family, designed specifically for 16-bit data converter interfacing where simultaneous DC accuracy, speed, and low distortion are non-negotiable.
FAQ
What is the maximum guaranteed input offset voltage for LT1469CS8#PBF at ±15 V supply?
The LT1469CS8#PBF has a maximum input offset voltage of 125 µV at ±15 V supply and 25°C, with a worst-case drift of 3 µV/°C over temperature. This specification is guaranteed for the C-grade (0°C to 70°C) version and validated per Linear Technology's production test flow - ensuring consistent 16-bit accuracy in production systems without individual unit calibration.
Can LT1469CS8#PBF drive a 2 kΩ load to ±12.8 V with ±15 V supplies?
Yes, the LT1469CS8#PBF guarantees a minimum output swing of ±12.8 V into 2 kΩ loads at ±15 V supplies, as specified in the Electrical Characteristics table. This capability enables direct interfacing with ±10 V industrial control standards and eliminates need for external level-shifting circuitry in PLC analog I/O modules.
Does LT1469CS8#PBF require external compensation for unity-gain stability?
No, the LT1469CS8#PBF is internally compensated and unity-gain stable - no external capacitors or resistors are needed for AV = 1 configurations. This simplifies ADC buffer and voltage follower designs while maintaining phase margin >60° across temperature and supply variations, as confirmed in Figure G20 of the datasheet.
What is the recommended bypass capacitor configuration for LT1469CS8#PBF?
For optimal AC and DC performance, LT1469CS8#PBF requires parallel bypassing: a 0.1 µF ceramic capacitor placed within 2 mm of each supply pin (V+ and V–), plus a 10 µF low-ESR tantalum capacitor located within 1 cm. This dual-capacitor strategy suppresses both high-frequency switching noise and low-frequency supply ripple, directly supporting the device's 90 MHz bandwidth and 5 nV/√Hz noise floor.
How does LT1469CS8#PBF handle capacitive loads in unity-gain configuration?
The LT1469CS8#PBF can directly drive up to 100 pF in unity-gain configuration without oscillation. For larger loads, a small series resistor (e.g., 10–50 Ω) should be added between the output and load, and a feedback capacitor (CF) sized per CF > RG·CIN/RF must be placed across the feedback resistor - as detailed in Figure F03 and Applications Information section.
LT1469CS8#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:
- 22V/µs
- Gain Bandwidth Product:
- 90 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):
- 5 V
- Voltage - Supply Span (Max):
- 9 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1469CS8#PBF FAQ
1.How can I place an order for LT1469CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469CS8#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 LT1469CS8#PBF reliable?
The price and inventory of LT1469CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1469CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1469CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469CS8#PBF?
LT1469CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469CS8#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 LT1469CS8#PBF?
For technical support, including LT1469CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469CS8#PBF requirements.
6.How does Aetrix verify that LT1469CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1469CS8#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 LT1469CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1469CS8#PBF?
All LT1469CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469CS8#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 LT1469CS8#PBF part is unused and in its original packaging.
Return procedure for LT1469CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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