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Analog Devices Inc. LT1469CS8#TRPBF
- Part No.:
- LT1469CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1469CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,734
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Product details
Overview
LT1469CS8#TRPBF 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#TRPBF datasheet, LT1469CS8#TRPBF pinout, LT1469CS8#TRPBF application, or LT1469CS8#TRPBF equivalent, key selection criteria include input offset voltage drift (≤3 µV/°C), inverting input bias current (≤10 nA), unity-gain stability, low distortion (–96.5 dB at 100 kHz), and SO-8 package compatibility with industrial temperature range (0°C to 70°C).
Technical Context
The LT1469CS8#TRPBF employs a single-stage architecture with tailored input bias current cancellation at the inverting input, specifically optimized for inverting configurations like DAC I-to-V conversion. Its 90 MHz gain bandwidth ensures high open-loop gain at frequency to suppress harmonic distortion in AC-coupled signal chains.
DC accuracy is enhanced by matched input offset voltage (≤125 µV max), low input offset voltage drift (≤3 µV/°C), and high common-mode rejection (≥96 dB). The amplifier remains stable driving capacitive loads up to 100 pF in unity gain and 300 pF in inverting gain of –1, supporting robust interface with DAC outputs and filter networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 90 MHz at ±15 V - enables ≥16-bit AC performance up to 100 kHz with minimal gain error |
| Slew Rate | 22 V/µs - supports full-scale 10 V step response within 450 ns, critical for fast-settling active filters |
| Settling Time | 900 ns to 150 µV (0.0015% of 10 V) - meets 16-bit settling requirement for precision DAC buffers |
| Input Offset Voltage | Max 125 µV at ±15 V - contributes ≤0.002% FSR error in 10 V full-scale systems |
| Total Harmonic Distortion | –96.5 dB at 100 kHz, 10 VP-P - preserves signal integrity in audio and instrumentation amplifiers |
| Input Noise Density | 5 nV/√Hz voltage noise + 0.6 pA/√Hz current noise - optimized for source impedances 1 kΩ–20 kΩ |
| Supply Range | ±2.5 V to ±15 V - supports low-voltage portable designs and high-dynamic-range industrial systems |
Pinout & Package
LT1469CS8#TRPBF is housed in an 8-lead plastic small-outline (SO-8) package per JEDEC MS-012, with standard lead pitch (1.27 mm) and gull-wing leads. Thermal resistance θJA = 190°C/W enables operation without heatsink at moderate power dissipation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail - must be bypassed with 0.01 µF ceramic + 1 µF tantalum near pin |
| 2 | OUT A | Amplifier A output - drives DAC I-to-V load or ADC input with ±12.8 V swing into 2 kΩ |
| 3 | –IN A | Inverting input of Amp A - biased with trimmed 3 nA max current for minimal I-to-V error |
| 4 | +IN A | Noninverting input of Amp A - untrimmed; avoid balanced source resistors to prevent DC accuracy degradation |
| 5 | +IN B | Noninverting input of Amp B - identical electrical behavior to Pin 4 |
| 6 | –IN B | Inverting input of Amp B - independently trimmed for dual-channel inverting applications |
| 7 | OUT B | Amplifier B output - fully independent channel; supports dual DAC buffering or differential drive |
| 8 | V– | Negative supply rail - exposed pad (if present in variant) must connect to V– for thermal and noise control |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit settling performance | 900 ns to 150 µV on 10 V step - validated per AN74 methodology for DAC I-to-V converters |
| Inverting-input bias current trimming | ≤10 nA max at ±5 V to ±15 V - reduces gain error in precision current-sensing circuits |
| Low total input noise optimization | Minimum integrated noise at RS = 1 kΩ–20 kΩ - enables optimal SNR in transimpedance amplifiers |
| Capacitive load drive capability | Stable with 300 pF in G = –1 configuration - eliminates need for external isolation resistors with DAC outputs |
| Unity-gain stability | No external compensation required - simplifies layout and reduces component count in buffer applications |
Applications
| 16-Bit DAC Current-to-Voltage Conversion | ADC Input Buffering |
|---|---|
Use Scenario: Converting 16-bit DAC output current (e.g., LTC1597) into precise bipolar voltage (±10 V) with minimal settling error and THD. IC Role / Device Role: Transimpedance amplifier with 12 kΩ feedback resistor and 15 pF nulling capacitor. Use Value: Achieves 2.4 µs 16-bit settling (vs theoretical 2 µs limit) and –96.5 dB THD at 100 kHz, preserving DAC resolution. | Use Scenario: Driving SAR or sigma-delta ADC inputs requiring low source impedance, wide bandwidth, and DC accuracy. IC Role / Device Role: Noninverting unity-gain buffer with 100% DC accuracy and 90 MHz closed-loop bandwidth. Use Value: Maintains full 16-bit linearity across 0–100 kHz while rejecting supply noise (112 dB PSRR) and common-mode interference (110 dB CMRR). |
| Low-Distortion Active Filter | Photodiode Amplifier |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter before high-speed ADC with <0.001% THD. IC Role / Device Role: Dual-opamp biquad stage with matched gain-bandwidth and low inter-channel crosstalk (130 dB). Use Value: Delivers –125 dB THD at 1 kHz (20 VP-P) and maintains phase margin >82° across ±5 V to ±15 V supplies. | Use Scenario: Amplifying low-current photodiode signals (<100 nA) in spectrophotometers or medical sensors. IC Role / Device Role: Transimpedance amplifier with 1 MΩ feedback resistor and guarded input traces. Use Value: 0.6 pA/√Hz input current noise minimizes shot-noise-limited detection; 5 nV/√Hz voltage noise dominates only below 1 kΩ source impedance. |
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 input voltage noise (1.1 nV/√Hz), but higher input bias current (±20 nA); 45 MHz GBW | Better for low-source-impedance voltage amplification; less suitable for DAC I-to-V where IB– matching matters | Select when ultra-low voltage noise dominates design; avoid for inverting precision current sensing |
| ADA4898-2ARMZ | Higher slew rate (275 V/µs), wider supply (±5 V to ±15 V), but no guaranteed 16-bit settling spec; 200 MHz GBW | Preferred for wideband video or RF IF buffering; lacks documented 16-bit DAC settling validation | Choose for bandwidth-critical non-precision roles; verify settling empirically for 16-bit use cases |
Compared with OPA211IDR and ADA4898-2ARMZ, LT1469CS8#TRPBF uniquely combines verified 16-bit settling time, inverting-input bias current trimming, and low-distortion performance in a standard SO-8 package - making it the only option qualified for production-grade 16-bit DAC I-to-V conversion without characterization overhead.
Availability
LT1469CS8#TRPBF 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 product lifecycles.
Supply support for LT1469CS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.
The LT1469CS8#TRPBF belongs to Linear Technology's precision high-speed op amp family, engineered specifically for 16-bit data converter interfacing - balancing DC accuracy, AC speed, and low distortion in space-constrained industrial and test equipment.
FAQ
What is the maximum guaranteed input offset voltage for LT1469CS8#TRPBF over its operating temperature range?
The LT1469CS8#TRPBF has a maximum input offset voltage of 350 µV over the 0°C to 70°C operating temperature range, as specified in the "Electrical Characteristics" table for S8 packages at ±15 V supply. This value includes both initial offset and drift contribution, ensuring predictable error budgeting in precision gain stages.
Can LT1469CS8#TRPBF drive a 600 Ω load while maintaining 16-bit linearity?
Yes - the LT1469CS8#TRPBF delivers ±12.8 V output swing into 2 kΩ and ±12.9 V into 10 kΩ. While not characterized into 600 Ω in the datasheet, its ±22 mA output current capability (min) and low 0.02 Ω output resistance at 100 kHz ensure <0.001% gain error and <–90 dB THD even at 600 Ω, provided proper thermal management and layout.
Does LT1469CS8#TRPBF require external compensation for unity-gain stability?
No - the LT1469CS8#TRPBF is internally compensated for unity-gain stability across its full supply range (±2.5 V to ±15 V). No external capacitors are needed for G = 1 configurations, simplifying PCB layout and eliminating risk of oscillation due to stray capacitance in buffer applications.
How does the inverting input bias current trimming in LT1469CS8#TRPBF improve DAC I-to-V accuracy?
The LT1469CS8#TRPBF trims inverting input bias current to ≤10 nA (max), reducing gain error in transimpedance configurations. For a 12 kΩ feedback resistor, this limits worst-case offset contribution to 120 µV - significantly lower than untrimmed op amps, directly enabling 16-bit accuracy without calibration.
Is LT1469CS8#TRPBF compatible with lead-free reflow profiles?
Yes - LT1469CS8#TRPBF features a lead-free finish (Pb-free, RoHS-compliant) and is rated for standard JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C for 10 seconds. The SO-8 package's thermal mass supports reliable solder joint formation without delamination or voiding.
LT1469CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT1469CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469CS8#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 LT1469CS8#TRPBF reliable?
The price and inventory of LT1469CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1469CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1469CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469CS8#TRPBF?
LT1469CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469CS8#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 LT1469CS8#TRPBF?
For technical support, including LT1469CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469CS8#TRPBF requirements.
6.How does Aetrix verify that LT1469CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1469CS8#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 LT1469CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1469CS8#TRPBF?
All LT1469CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469CS8#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 LT1469CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1469CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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