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Analog Devices Inc. LT1469CDF-2#PBF
- Part No.:
- LT1469CDF-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT1469CDF-2#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,335
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Product details
Overview
LT1469CDF-2#PBF from Analog Devices (acquired Linear Technology) is a dual, decompensated precision high-speed operational amplifier optimized for gain ≥ 2 configurations, delivering 200MHz gain bandwidth, 30V/μs slew rate, and 16-bit DC accuracy (max 125μV input offset voltage at ±15V, 0°C–70°C). It serves as a high-fidelity current-to-voltage converter for 16-bit DACs and low-distortion buffer for 16-bit ADCs in data acquisition systems.
For engineers reviewing the LT1469CDF-2#PBF datasheet, LT1469CDF-2#PBF pinout, LT1469CDF-2#PBF application, or LT1469CDF-2#PBF equivalent, key selection criteria include its gain-stability requirement (AV ≥ 2), DFN-12 package thermal performance (θJA = 37°C/W), 150μV settling time (800ns), and matched dual-channel specifications for instrumentation-grade signal conditioning.
Technical Context
The LT1469CDF-2#PBF uses a decompensated architecture requiring minimum closed-loop gain of 2 (AV = –1) for stability, distinguishing it from unity-gain stable variants like the LT1469. Its input stage features bias current cancellation tailored for inverting applications, with trimmed inverting input bias current (±10nA max) and untrimmed noninverting input bias current (±40nA max).
It achieves 16-bit accuracy via low drift (3μV/°C max VOS drift), low noise (5nV/√Hz voltage noise, 0.6pA/√Hz current noise), and high open-loop gain (300V/mV min into 2kΩ), enabling full AC/DC performance in precision data paths. Total input noise is optimized for source resistances between 1kΩ and 20kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 200MHz - Enables high loop gain at 100kHz for <0.01% harmonic distortion in ADC buffers. |
| Slew Rate | 30V/μs - Supports fast large-signal transient response (e.g., 10V step in 800ns to 150μV) in active filters. |
| Input Offset Voltage | 125μV max (±15V, 0°C–70°C) - Ensures <1 LSB error in 16-bit DAC I-to-V conversion with 6kΩ feedback. |
| Settling Time | 800ns to 150μV (10V step, AV = –1) - Meets timing budgets for high-throughput data acquisition systems. |
| Input Noise Density | 5nV/√Hz @ 10kHz - Combined with 0.6pA/√Hz current noise, minimizes total input-referred noise in 1k–20kΩ sources. |
| Supply Voltage Range | ±4.5V to ±15V - Compatible with industrial ±5V and ±15V rails; PSRR ≥ 100dB ensures immunity to supply ripple. |
| Output Swing | ±12.8V into 2kΩ (±15V supplies) - Delivers full-scale analog range for 16-bit systems without clipping. |
Pinout & Package
LT1469CDF-2#PBF is housed in a 12-lead (4mm × 4mm) plastic DFN package with exposed pad (Pin 13) tied 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) | Unused pins; must be left floating or grounded per layout guidelines-no internal connection. |
| 5, 6 | +IN A / –IN A | Differential inputs for Amplifier A; inverting input biased for low error in I-to-V applications. |
| 7, 8 | +IN B / –IN B | Differential inputs for Amplifier B; matched to Amplifier A for dual-channel instrumentation. |
| 9, 10 | OUT A / OUT B | Amplifier outputs; capable of ±12.8V swing into 2kΩ with 30V/μs slew rate. |
| V+ | Positive Supply | Accepts +4.5V to +15V; requires local 0.01–0.1μF RF bypass capacitor adjacent to pin. |
| V– | Negative Supply | Accepts –4.5V to –15V; exposed pad (Pin 13) must be soldered to V– plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Gain ≥ 2 Stability | Decompensated design enables 200MHz GBW only when configured for AV ≥ 2-critical for high-speed precision loops. |
| Inverting Input Bias Current Trim | ±10nA max IB– at ±15V-minimizes offset error in DAC I-to-V converters where feedback resistor sets gain. |
| Matched Dual Channel | ΔVOS ≤ 225μV (±15V), ΔCMRR ≥ 93dB-enables common-mode rejection in differential sensor interfaces. |
| Optimized Input Noise | Total input noise minimized for RS = 1kΩ–20kΩ-reduces integrated noise in precision transimpedance amplifiers. |
| Robust Input Protection | 100Ω series resistors + back-to-back diodes on each input-limits differential input current to <10mA under fault. |
Applications
| 16-Bit DAC Current-to-Voltage Converter | ADC Buffer for 16-Bit Sampling |
|---|---|
Use Scenario: Converting output current from LTC1597 16-bit parallel DAC into precise voltage with minimal settling error and <1 LSB INL. IC Role / Device Role / Timing Role: Precision transimpedance amplifier operating at AV = –1 with 6kΩ feedback and 20pF compensation to match DAC output capacitance. Use Value: 800ns settling to 150μV ensures full 16-bit accuracy within sampling window; 125μV VOS guarantees <1 LSB offset at 10V full scale. |
Use Scenario: Driving input of LTC1604 16-bit, 333ksps ADC while preserving SINAD > 90dB and THD < –100dB. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer with low distortion (–96.5dB @ 100kHz) and rail-to-rail output swing. Use Value: 30V/μs slew rate prevents slewing-induced distortion on fast ADC input steps; 5nV/√Hz noise avoids degrading ADC's 90dB SNR. |
| Low-Distortion Active Filter | Photodiode Amplifier |
Use Scenario: Implementing 4th-order Butterworth filter for anti-aliasing before 16-bit ADC, requiring <0.01% THD at 100kHz. IC Role / Device Role / Timing Role: Dual op-amp stage in MFB topology with gain ≥ 2 per stage to maintain stability and bandwidth. Use Value: 200MHz GBW supports high-Q filter design with minimal phase shift; matched channels enable precise biquad coefficient matching. |
Use Scenario: Amplifying low-level current from silicon photodiode in optical encoder or spectrometer, requiring femtoamp-level input bias control. IC Role / Device Role / Timing Role: Transimpedance amplifier with guarded inverting input and 1MΩ–10MΩ feedback resistor. Use Value: Trimmed IB– (±10nA max) reduces dark-current-induced offset; 0.6pA/√Hz current noise preserves signal integrity in high-Z photodiode circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1469IS8-2#PBF | Same core specs but in 8-lead SOIC package (θJA = 190°C/W); wider temp range (–40°C to 85°C); higher VOS (225μV max). | Better thermal margin for extended temperature operation; larger footprint; lower power density. | Select for industrial environments requiring –40°C operation where DFN thermal constraints are unacceptable. |
| LT1468CS8#PBF | Single-channel, unity-gain stable version; 90MHz GBW, 22V/μs slew rate; 75μV VOS max; SO-8 only. | Supports AV = 1 configurations (e.g., voltage followers); lower speed and power; no dual-channel matching. | Select when single-ended buffering or unity-gain stability is required, and dual-channel matching is unnecessary. |
Compared with LT1469IS8-2#PBF, the LT1469CDF-2#PBF offers superior thermal performance and smaller footprint but narrower temperature range; compared with LT1468CS8#PBF, it delivers higher speed, dual-channel integration, and gain ≥ 2 optimization at the cost of reduced configuration flexibility.
Availability
LT1469CDF-2#PBF 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 production lifecycles.
Supply support for LT1469CDF-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 data conversion systems, balancing high DC accuracy, wide bandwidth, and low distortion in decompensated dual op-amp form.
FAQ
What is the minimum stable gain for LT1469CDF-2#PBF?
The LT1469CDF-2#PBF is decompensated and requires a minimum closed-loop gain of 2 (AV ≥ 2) for stability, including AV = –1 configurations. 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 and is not supported.
Does LT1469CDF-2#PBF support ±5V supplies?
Yes, LT1469CDF-2#PBF is fully specified for ±5V operation across all key parameters including input offset voltage (200μV max), slew rate (22V/μs), gain bandwidth (190MHz), and output swing (±2.8V into 2kΩ). Electrical Characteristics tables explicitly list ±5V test conditions for every parameter.
What is the function of Pin 13 on the LT1469CDF-2#PBF DFN package?
Pin 13 is the exposed thermal pad on the bottom of the LT1469CDF-2#PBF DFN package and must be connected to the V– supply plane. As stated in the Pin Configuration diagram and Package Description, this connection is mandatory for both thermal dissipation (θJA = 37°C/W) and electrical reference integrity.
Can LT1469CDF-2#PBF be used in inverting amplifier configurations?
Yes, LT1469CDF-2#PBF is explicitly optimized for inverting applications: its inverting input bias current is trimmed (±10nA max), and the datasheet states "initial accuracy and drift characteristics… are tailored for inverting applications" such as DAC current-to-voltage conversion.
How does the input noise of LT1469CDF-2#PBF vary with source resistance?
LT1469CDF-2#PBF total input noise is optimized for source resistances between 1kΩ and 20kΩ. Below 1kΩ, voltage noise dominates (5nV/√Hz); above 20kΩ, current noise dominates (0.6pA/√Hz). This is documented in the "Total Input Noise Optimized for 1kΩ < RS < 20kΩ" feature and Figure 14692 G06.
LT1469CDF-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 12-WFDFN Exposed Pad
- 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:
- 100 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:
- 12-DFN (4x4)
LT1469CDF-2#PBF FAQ
1.How can I place an order for LT1469CDF-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469CDF-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 LT1469CDF-2#PBF reliable?
The price and inventory of LT1469CDF-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 LT1469CDF-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1469CDF-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469CDF-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469CDF-2#PBF?
LT1469CDF-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469CDF-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 LT1469CDF-2#PBF?
For technical support, including LT1469CDF-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469CDF-2#PBF requirements.
6.How does Aetrix verify that LT1469CDF-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1469CDF-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 LT1469CDF-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1469CDF-2#PBF?
All LT1469CDF-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469CDF-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 LT1469CDF-2#PBF part is unused and in its original packaging.
Return procedure for LT1469CDF-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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