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Analog Devices Inc. LT1469AIDF-2#TRPBF
- Part No.:
- LT1469AIDF-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT1469AIDF-2#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,608
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Product details
Overview
LT1469AIDF-2#TRPBF 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 16-bit ADCs in industrial data acquisition systems.
For engineers reviewing the LT1469AIDF-2#TRPBF datasheet, LT1469AIDF-2#TRPBF pinout, LT1469AIDF-2#TRPBF application, or LT1469AIDF-2#TRPBF equivalent, key selection criteria include guaranteed –40°C to 85°C operation, 125 μV max input offset voltage (±15 V), 3 μV/°C max drift, 10 nA max inverting input bias current, and DFN package thermal performance with exposed ground pad.
Technical Context
The LT1469AIDF-2#TRPBF uses a decompensated architecture requiring minimum closed-loop gain of 2 for stability-enabling higher bandwidth and faster settling (800 ns to 150 μV) than unity-gain-stable counterparts. Its input stage features bias current cancellation tailored for inverting configurations, minimizing error in DAC I-to-V conversion.
DC precision is maintained across temperature via laser-trimmed offset and matched input transistors, while AC performance leverages high slew rate and low noise (5 nV/√Hz, 0.6 pA/√Hz) to preserve signal integrity in wideband active filters and photodiode amplifiers operating up to 100 kHz with –96.5 dB THD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 200 MHz at ±15 V - enables >100 kHz full-power bandwidth with 10 VP-P output swing |
| Slew Rate | 30 V/μs at ±15 V - supports fast large-signal transient response in instrumentation amplifiers |
| Input Offset Voltage | 125 μV max (±15 V, –40°C to 85°C) - 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 requirements for high-throughput data acquisition |
| Input Noise Density | 5 nV/√Hz (10 kHz) and 0.6 pA/√Hz - optimized total input noise for source resistances 1 kΩ–20 kΩ |
| Supply Voltage Range | ±2.5 V to ±15 V - supports low-voltage (±5 V) and high-dynamic-range (±15 V) system designs |
| Output Swing | ±12.8 V into 2 kΩ (±15 V supply) - delivers rail-to-rail usable dynamic range for ±12 V systems |
Pinout & Package
LT1469AIDF-2#TRPBF is housed in a 12-lead (4 mm × 4 mm) plastic DFN package with exposed pad (Pin 13) connected to V–. The package provides low thermal resistance (θJA = 37°C/W) and compact footprint for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 11, 12 | No Connect (N/C) | Unbonded pins; must be left floating or tied to ground per layout best practice |
| 5, 6 | +IN A / –IN A | Noninverting/inverting inputs of Amplifier A - high-impedance, bias-canceled inputs for precision inverting applications |
| 7, 8 | +IN B / –IN B | Noninverting/inverting inputs of Amplifier B - identical electrical characteristics to Amplifier A for matched dual-channel performance |
| 9, 10 | OUT A / OUT B | Amplifier A/B outputs - capable of ±12.8 V swing into 2 kΩ with <0.01% settling error |
| V+ | Positive Supply | Accepts +2.5 V to +15 V; requires local 0.01–0.1 μF RF bypass capacitor |
| V– | Negative Supply | Accepts –2.5 V to –15 V; exposed pad (Pin 13) must be soldered to V– plane for thermal and noise performance |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit DC accuracy | 125 μV max VOS, 3 μV/°C max drift, and 10 nA max IB– enable sub-LSB error in 16-bit DAC I-to-V converters |
| Gain ≥ 2 stability | Decompensated design guarantees stability only at AV ≥ 2 (e.g., AV = –1), enabling 200 MHz GBW without external compensation |
| Low distortion | –96.5 dB THD at 100 kHz, 10 VP-P - preserves spectral purity in active filter and ADC buffer applications |
| Optimized input noise | Total input noise minimized for RS = 1 kΩ–20 kΩ - reduces integrated noise in photodiode and sensor front-end amplifiers |
| Thermally enhanced DFN | Exposed V– pad (Pin 13) and θJA = 37°C/W allow sustained high-output-current operation without heat sinking |
Applications
| 16-Bit DAC Current-to-Voltage Converter | ADC Buffer for Precision Data Acquisition |
|---|---|
|
Use Scenario: Converting output current from LTC1597 16-bit parallel DAC into precise voltage with minimal settling error and glitch energy. IC Role / Device Role / Timing Role: Inverting op-amp configured as I-to-V converter with 6 kΩ feedback resistor and 20 pF DAC output capacitance compensation. Use Value: 800 ns settling to 150 μV ensures full 16-bit accuracy within sampling window; 125 μV VOS contributes <1 LSB error at 10 V full scale. |
Use Scenario: Driving SAR or sigma-delta ADC inputs (e.g., LTC1604) while maintaining DC linearity and AC fidelity across 0–100 kHz bandwidth. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer with low noise and high open-loop gain (>300 V/mV) to minimize loading-induced distortion. Use Value: 5 nV/√Hz input voltage noise and –96.5 dB THD preserve SINAD >90 dB; ±12.8 V swing supports ±12 V ADC reference ranges. |
| Low-Distortion Active Filter | Photodiode Transimpedance Amplifier |
|
Use Scenario: Implementing 4th-order Butterworth bandpass filter for sensor signal conditioning in vibration monitoring systems. IC Role / Device Role / Timing Role: Dual op-amp used in two cascaded 2nd-order stages with gain ≥ 2 per stage to maintain stability and bandwidth. Use Value: 200 MHz GBW and 30 V/μs slew rate enable flat group delay and minimal phase distortion up to 100 kHz cutoff frequency. |
Use Scenario: Amplifying weak photocurrents (nA–μA) from high-impedance photodiodes in optical encoders or spectrometers. IC Role / Device Role / Timing Role: Inverting transimpedance amplifier with feedback resistor up to 20 kΩ, leveraging bias current cancellation on –IN pin. Use Value: 10 nA max IB– and 0.6 pA/√Hz current noise minimize dark-current-induced offset and shot-noise degradation. |
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#TRPBF | Same core specs but in 8-lead SOIC package; θJA = 190°C/W vs 37°C/W; no exposed thermal pad | Preferred for prototyping or lower-power applications where thermal dissipation is not limiting | Select when board space allows SOIC and thermal load is <100 mW per amplifier |
| LT1468CS8#TRPBF | Single-channel version; 90 MHz GBW, 22 V/μs slew rate, 75 μV max VOS; unity-gain stable | Suitable for single-ended signal paths where gain <2 is required or space permits discrete channel separation | Choose when unity-gain stability is mandatory or only one amplifier channel is needed per board area |
Compared with LT1469AIDF-2#TRPBF, the LT1469IS8-2#TRPBF trades thermal performance for ease of hand-soldering and test, while the LT1468CS8#TRPBF offers unity-gain stability and lower power at the cost of bandwidth and dual-channel integration.
Availability
LT1469AIDF-2#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, 16-bit DAC interface modules, and precision instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LT1469AIDF-2#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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1469 family was developed by Linear Technology to bridge the gap between precision op amps and high-speed amplifiers, targeting 16-bit data converter interfaces where both DC accuracy and AC fidelity are non-negotiable.
FAQ
What is the minimum stable gain for LT1469AIDF-2#TRPBF?
The LT1469AIDF-2#TRPBF is decompensated and specified as stable only for closed-loop gains ≥ 2 (AV = –1). Attempting unity-gain (AV = 1) or AV < 2 configurations risks oscillation. Stability is verified per Figure 17 in the LT1469-2 datasheet under ±15 V supply with 2 kΩ feedback and 22 pF compensation.
Does LT1469AIDF-2#TRPBF support ±5 V operation?
Yes, LT1469AIDF-2#TRPBF is fully specified for ±5 V supplies across –40°C to 85°C. At ±5 V, typical slew rate is 22 V/μs, gain bandwidth is 190 MHz, and maximum output swing is ±2.8 V into 2 kΩ - all guaranteed per Electrical Characteristics Table on page 5 of the datasheet.
How is the exposed pad (Pin 13) of LT1469AIDF-2#TRPBF used?
The exposed pad (Pin 13) of LT1469AIDF-2#TRPBF is electrically connected to V– and must be soldered to a dedicated V– copper pour on the PCB. This connection is mandatory for achieving θJA = 37°C/W and optimal noise/thermal performance; leaving it unconnected degrades thermal dissipation and increases junction temperature.
Can LT1469AIDF-2#TRPBF drive heavy capacitive loads?
LT1469AIDF-2#TRPBF is not optimized for direct capacitive loads >100 pF. For DAC output capacitance (e.g., 20 pF), use feedback compensation (CF = RG • CIN/RF) as shown in Figure 1. Driving >100 pF requires isolation resistor or buffer stage to prevent peaking or instability.
What is the input bias current behavior on the –IN pin of LT1469AIDF-2#TRPBF?
The –IN pin of LT1469AIDF-2#TRPBF features trimmed bias current cancellation, resulting in max ±10 nA over –40°C to 85°C. This is critical for inverting applications like DAC I-to-V conversion, where uncancelled bias current would introduce gain-dependent offset errors. The +IN pin has wider variation (±40 nA max) and should not be used as the primary input in precision inverting circuits.
LT1469AIDF-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 12-DFN (4x4)
LT1469AIDF-2#TRPBF FAQ
1.How can I place an order for LT1469AIDF-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469AIDF-2#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 LT1469AIDF-2#TRPBF reliable?
The price and inventory of LT1469AIDF-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1469AIDF-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1469AIDF-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469AIDF-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469AIDF-2#TRPBF?
LT1469AIDF-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469AIDF-2#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 LT1469AIDF-2#TRPBF?
For technical support, including LT1469AIDF-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469AIDF-2#TRPBF requirements.
6.How does Aetrix verify that LT1469AIDF-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1469AIDF-2#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 LT1469AIDF-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1469AIDF-2#TRPBF?
All LT1469AIDF-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469AIDF-2#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 LT1469AIDF-2#TRPBF part is unused and in its original packaging.
Return procedure for LT1469AIDF-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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