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Analog Devices Inc. LT1469CS8-2#PBF
- Part No.:
- LT1469CS8-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1469CS8-2#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,988
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Product details
Overview
LT1469CS8-2#PBF from Analog Devices (formerly 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 ±5V or ±15V systems.
For engineers reviewing the LT1469CS8-2#PBF datasheet, LT1469CS8-2#PBF pinout, LT1469CS8-2#PBF application, or LT1469CS8-2#PBF equivalent, this page provides verified specifications, SOIC-8 package terminal mapping, real-world settling behavior (800 ns to 150 µV), input bias current matching (≤18 nA), and validated alternatives for DAC I-to-V and ADC buffer designs.
Technical Context
The LT1469CS8-2#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 trimmed inverting-input bias current (≤10 nA) and matched offset voltage (ΔVOS ≤ 225 µV) to minimize errors in inverting configurations like DAC I-to-V conversion.
It achieves 16-bit AC/DC performance via low distortion (–96.5 dB at 100 kHz, 10 VP-P), ultra-low input noise (5 nV/√Hz, 0.6 pA/√Hz), and total input noise optimized for source resistances between 1 kΩ and 20 kΩ. Specified over 0°C to 70°C, it supports rail-to-rail output swing (±12.8 V into 2 kΩ) with ±15 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 200 MHz - Enables high open-loop gain at frequency for <0.01% THD in 100 kHz signal paths |
| Slew Rate | 30 V/µs - Supports full-scale 10 V step settling in <800 ns without slewing-induced distortion |
| Input Offset Voltage | 125 µV max - Ensures <1 LSB error in 16-bit DAC I-to-V conversion with 6 kΩ feedback |
| Settling Time | 800 ns to 150 µV (10 V step, AV = –1) - Meets timing budget for 1 MSPS data acquisition systems |
| Input Noise Density | 5 nV/√Hz @ 10 kHz - Dominates total noise only below 1 kΩ source resistance; optimized for 1–20 kΩ range |
| DC Open-Loop Gain | 300 V/mV min - Guarantees >100 dB loop gain at DC for stable 16-bit precision in closed-loop buffers |
| Supply Voltage Range | ±2.5 V to ±15 V - Operates from low-voltage ±5 V rails while maintaining full 16-bit linearity |
Pinout & Package
LT1469CS8-2#PBF is housed in an 8-lead plastic SOIC (narrow, 0.150") package with exposed pad not present. Pin 1 is marked by notch or dot; device orientation follows standard SOIC top view.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN A | Noninverting input of Amplifier A - High-impedance node; bias current untrimmed (±40 nA max) |
| 2 | –IN A | Inverting input of Amplifier A - Trimmed bias current (≤10 nA); critical for I-to-V accuracy |
| 3 | OUT A | Amplifier A output - Capable of ±12.8 V swing into 2 kΩ; requires local bypassing for stability |
| 4 | V– | Negative supply rail - Must be connected to ground plane; exposed pad on DFN variants is tied to V– |
| 5 | V+ | Positive supply rail - Bypass with 0.01–0.1 µF ceramic + 1–10 µF tantalum per amplifier |
| 6 | –IN B | Inverting input of Amplifier B - Matched to Pin 2 (ΔIB– ≤ 18 nA); enables dual-channel synchronous buffering |
| 7 | +IN B | Noninverting input of Amplifier B - Independent of Pin 1; no internal matching to Amplifier A inputs |
| 8 | OUT B | Amplifier B output - Electrically identical to Pin 3; channel separation >100 dB minimizes crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Stable at AV ≥ 2 | Enables 200 MHz GBW and 30 V/µs slew rate - 2.5× higher bandwidth than unity-gain-stable LT1469 |
| 16-bit DC accuracy | 125 µV VOS max + 3 µV/°C drift ensures <1 LSB error across 0°C–70°C in 16-bit systems |
| Optimized input bias matching | Inverting input bias current match ΔIB– ≤ 18 nA - reduces common-mode error in dual DAC I-to-V arrays |
| Low distortion at high frequency | –96.5 dB THD at 100 kHz, 10 VP-P - preserves SNR in wideband instrumentation amplifier front-ends |
| Total input noise optimization | Minimum integrated noise at RS = 1–20 kΩ - eliminates need for external noise-filtering resistors in DAC interfaces |
Applications
| 16-Bit DAC Current-to-Voltage Converter | High-Speed ADC Buffer |
|---|---|
|
Use Scenario: Converting output current from LTC1597 16-bit parallel multiplying DAC into precise voltage with minimal glitch-induced error. IC Role / Device Role / Timing Role: Inverting op-amp configured with 6 kΩ feedback resistor; compensates DAC output capacitance (20 pF) using 22 pF feedback capacitor. Use Value: Achieves 1.6 µs settling to 150 µV (0.01%) - meets timing requirement for 1 MSPS sampling without aperture uncertainty penalty. |
Use Scenario: Driving SAR ADC inputs (e.g., LTC1604) with full-scale ±10 V signals while preserving 90 dB SINAD. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer with 50 pF optional noise filter; maintains DC accuracy and low distortion up to 100 kHz. Use Value: Delivers –96.5 dB THD at 100 kHz and 125 µV offset - ensures <1 LSB differential nonlinearity in 16-bit acquisition. |
| Low-Distortion Active Filter | Photodiode Transimpedance Amplifier |
|
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter preceding 16-bit ADC in medical sensor front-end. IC Role / Device Role / Timing Role: Dual-amplifier topology (one per stage); gain ≥ 2 per stage ensures stability and bandwidth retention. Use Value: 200 MHz GBW allows filter corner at 100 kHz with <0.1 dB passband ripple - avoids phase-induced group delay distortion. |
Use Scenario: Amplifying low-level photocurrent (<100 nA) from unbiased photodiode in precision optical measurement system. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10 MΩ feedback; leverages low input bias current (≤10 nA) and 5 nV/√Hz voltage noise. Use Value: Total input-referred noise <15 fA/√Hz at 1 kHz - enables sub-picoamp resolution without cooling or chopper stabilization. |
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 |
|---|---|---|---|
| LT1469IS8-2#PBF | Same silicon, extended temperature range (–40°C to 85°C); VOS max = 500 µV vs. 125 µV for C-grade | Required for industrial/outdoor deployments; not suitable for cost-sensitive commercial 0°C–70°C designs | Select LT1469CS8-2#PBF for commercial-grade cost optimization where ambient stays within 0°C–70°C |
| LT1468CS8#PBF | Single-channel, unity-gain stable; lower GBW (90 MHz), slower slew (22 V/µs), higher VOS (75 µV max) | Acceptable for single-ended, lower-bandwidth ADC buffers but cannot replace dual-channel or AV ≥ 2 requirements | Use LT1468CS8#PBF only when circuit requires unity-gain stability or single-amplifier footprint |
Compared with LT1469IS8-2#PBF, the LT1469CS8-2#PBF trades extended temperature capability for tighter DC specs and lower cost; versus LT1468CS8#PBF, it delivers dual-channel operation, 2.2× higher bandwidth, and guaranteed gain ≥ 2 stability-critical for high-fidelity DAC I-to-V conversion.
Availability
LT1469CS8-2#PBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, 16-bit DAC interface modules, and precision ADC front-ends requiring stable component supply across commercial temperature ranges.
Supply support for LT1469CS8-2#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear precision analog products.
The LT1469 family was designed specifically for 16-bit data conversion systems-balancing high-speed AC performance with microvolt-level DC precision in decompensated dual op-amps.
FAQ
What is the minimum stable gain for LT1469CS8-2#PBF?
The LT1469CS8-2#PBF is decompensated and requires a minimum closed-loop gain of 2 (AV = –1) for stability. This is confirmed in the datasheet's "Stable in Gain AV ≥ 2 (AV = –1)" feature and Applications Information section. Using it at unity gain risks oscillation; for AV = 1, select the LT1469 instead.
Can LT1469CS8-2#PBF drive a 2 kΩ load with ±12.8 V swing on ±15 V supplies?
Yes. The LT1469CS8-2#PBF guarantees ±12.8 V minimum output swing into 2 kΩ with 1 mV overdrive on ±15 V supplies, as specified in the Electrical Characteristics table. This enables direct interfacing with ±10 V ADC inputs without level-shifting circuitry.
How does LT1469CS8-2#PBF handle input overvoltage conditions?
The LT1469CS8-2#PBF includes 100 Ω series resistors and back-to-back diodes at each input, plus ESD clamps to both supplies. Input current must be limited to <10 mA if differential voltage exceeds 0.7 V or if inputs go beyond supply rails-external series resistors are required for robust overvoltage protection.
Is LT1469CS8-2#PBF pin-compatible with LT1469CS8#PBF?
No. The LT1469CS8-2#PBF (decompensated, AV ≥ 2 stable) and LT1469CS8#PBF (unity-gain stable) share identical SOIC-8 pinout and footprint, but their internal compensation differs. Swapping them requires verifying loop stability-LT1469CS8#PBF may underperform in AV ≥ 2 circuits, while LT1469CS8-2#PBF will oscillate at AV = 1.
What layout practices maximize settling performance of LT1469CS8-2#PBF?
To achieve the specified 800 ns settling time, use a solid ground plane, keep input traces short and symmetrical, bypass each supply pin with 0.01 µF ceramic + 1 µF tantalum, and implement guard rings tied to V– for inverting configurations. Avoid long feedback traces and minimize parasitic capacitance at –IN pins.
LT1469CS8-2#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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1469CS8-2#PBF FAQ
1.How can I place an order for LT1469CS8-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469CS8-2#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 LT1469CS8-2#PBF reliable?
The price and inventory of LT1469CS8-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1469CS8-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1469CS8-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469CS8-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469CS8-2#PBF?
LT1469CS8-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469CS8-2#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 LT1469CS8-2#PBF?
For technical support, including LT1469CS8-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469CS8-2#PBF requirements.
6.How does Aetrix verify that LT1469CS8-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1469CS8-2#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 LT1469CS8-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1469CS8-2#PBF?
All LT1469CS8-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469CS8-2#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 LT1469CS8-2#PBF part is unused and in its original packaging.
Return procedure for LT1469CS8-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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