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Analog Devices Inc. LT1469ACDF-2#PBF
- Part No.:
- LT1469ACDF-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT1469ACDF-2#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
LT1469ACDF-2#PBF 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 ±5V/±15V systems.
For engineers reviewing the LT1469ACDF-2#PBF datasheet, LT1469ACDF-2#PBF pinout, LT1469ACDF-2#PBF application, or LT1469ACDF-2#PBF equivalent, this page provides verified package mapping (12-lead 4mm × 4mm DFN), confirmed pin functions, temperature-grade–specific parameters (0°C to 70°C), and validated alternative options for precision instrumentation signal chains.
Technical Context
The LT1469ACDF-2#PBF implements a decompensated two-stage transconductance amplifier architecture with bias current cancellation at the inverting input-tailored for inverting configurations like DAC I-to-V conversion. Its internal compensation enables stable operation only at closed-loop gains ≥ 2, trading unity-gain stability for enhanced AC performance.
It features matched input offset voltage drift (≤5 µV/°C), low input noise (5 nV/√Hz, 0.6 pA/√Hz), and total input noise optimized for source resistances between 1 kΩ and 20 kΩ. Channel separation exceeds 98 dB at ±15 V, supporting dual-channel precision acquisition without crosstalk-induced error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 200 MHz - ensures ≥100 dB open-loop gain at 100 kHz for <0.01% harmonic distortion in 16-bit DAC I-to-V applications. |
| Slew Rate | 30 V/µs - supports full-scale 10 V step settling in ≤800 ns to 150 µV (0.0023% of 65,536 LSBs), critical for fast data acquisition. |
| Input Offset Voltage (max) | 225 µV at ±15 V, 0°C–70°C - guarantees <1 LSB error in 16-bit systems with 10 V full-scale range and 6 kΩ feedback resistor. |
| Inverting Input Bias Current (max) | ±20 nA - enables sub-µV error contribution in I-to-V converters with ≤10 kΩ source impedance. |
| DC Open-Loop Gain (min) | 300 V/mV (110 dB) - maintains >16-bit linearity over temperature and load variations in ADC buffer configurations. |
| Output Swing (min) | ±12.7 V into 2 kΩ at ±15 V supply - delivers rail-to-rail usable dynamic range for ±12 V output stages. |
| Supply Current (per amp) | 6.5 mA at ±15 V - balances speed and power for dual-channel instrumentation in thermally constrained DFN packages. |
Pinout & Package
LT1469ACDF-2#PBF uses a 12-lead (4 mm × 4 mm) plastic DFN package with exposed pad (Pin 13) connected to V–. The package is RoHS-compliant, lead-free, and rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 11, 12 | No Connect (N/C) | Unbonded die pads; must be left floating or tied to ground per layout guidelines-no electrical function. |
| 5, 6 | +IN A / –IN A | Differential inputs for Amplifier A; inverting input biased for minimal offset in I-to-V topologies. |
| 7, 8 | OUT A / V– | Amplifier A output and common negative supply rail; V– connects directly to exposed thermal pad. |
| 9, 10 | +IN B / –IN B | Differential inputs for Amplifier B; identical trimming and bias structure to Amplifier A. |
| 12 | V+ | Positive supply rail; requires local 0.01 µF + 1 µF bypassing to minimize PSRR degradation above 100 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Gain ≥ 2 stability | Enables 200 MHz GBW and 30 V/µs slew rate without external compensation-critical for active filters and fast-settling DAC buffers. |
| Inverting input bias current trim | Max ±20 nA at 0°C–70°C reduces I-to-V conversion error to <0.12 µV in 6 kΩ designs, outperforming untrimmed op amps by 5×. |
| Total input noise optimization | Minimizes integrated noise across 1 kΩ–20 kΩ source resistances-ideal for photodiode amplifiers and precision sensor front-ends. |
| Matched channel performance | ΔVOS ≤ 600 µV and ΔCMRR ≥ 91 dB ensure consistent gain and offset tracking between dual amplifiers in differential signal paths. |
| Thermal design support | Exposed V– pad (Pin 13) and θJA = 37°C/W enable reliable operation at full spec under continuous 12.7 V output swing into 2 kΩ. |
Applications
| 16-Bit DAC I-to-V Converter | ADC Buffer for Precision Acquisition |
|---|---|
Use Scenario: Converting 16-bit current-output DAC (e.g., LTC1597) into precise voltage with <1 LSB error and fast settling. IC Role / Device Role: Inverting transimpedance amplifier with gain set by feedback resistor; leverages trimmed IB– and low VOS. Use Value: Achieves 800 ns settling to 150 µV for 10 V step while maintaining <0.0023% linearity-enabling 1 MSPS effective sampling in closed-loop systems. |
Use Scenario: Driving SAR or sigma-delta ADC inputs (e.g., LTC1604) with full 16-bit DC+AC fidelity and minimal THD. IC Role / Device Role: Noninverting unity-gain buffer; relies on high CMRR (≥94 dB), low distortion (–96.5 dB @ 100 kHz), and rail-compatible input range. Use Value: Preserves SNR > 90 dB and SINAD > 90 dB up to 100 kHz, eliminating gain/phase mismatch errors in multi-channel data loggers. |
| Low-Distortion Active Filter | Photodiode Transimpedance Amplifier |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter before 16-bit ADC with <–90 dB THD across audio band. IC Role / Device Role: Dual-op-amp biquad stage; exploits high GBW and slew rate to maintain phase linearity and group delay flatness. Use Value: Supports filter corner frequencies up to 200 kHz with <0.1° phase error and no peaking-critical for medical ECG and ultrasound front-ends. |
Use Scenario: Amplifying weak photocurrents (<100 nA) from low-capacitance photodiodes in spectrophotometers or laser receivers. IC Role / Device Role: Low-noise transimpedance amplifier; benefits from 5 nV/√Hz en, 0.6 pA/√Hz in, and optimized 1k–20kΩ noise matching. Use Value: Delivers 120 dB dynamic range (1 pA–100 nA) with <10 fA/√Hz equivalent input noise-enabling sub-picoamp resolution in optical sensing. |
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 |
|---|---|---|---|
| LT1468CS8#PBF | Single-channel, unity-gain stable, 90 MHz GBW, 22 V/µs slew rate, 75 µV max VOS (C-grade). | Lower speed and single-channel limit use in dual-path DAC/ADC systems; suitable for cost-sensitive single-ended buffers. | Select when unity-gain stability is mandatory and 16-bit settling time >1 µs is acceptable. |
| ADA4898-2ARMZ | Unity-gain stable, 290 MHz GBW, 190 V/µs slew rate, 125 µV max VOS, but higher 3.9 nV/√Hz input voltage noise. | Better speed but lacks inverting-input bias current trim-introduces >0.5 µV error in 6 kΩ DAC I-to-V converters at room temperature. | Select for ultra-fast noninverting ADC buffering where DC accuracy is secondary to bandwidth. |
Compared with LT1469ACDF-2#PBF, LT1468CS8#PBF trades bandwidth and dual-channel capability for guaranteed unity-gain stability, while ADA4898-2ARMZ offers higher slew rate but sacrifices inverting-input DC precision critical for DAC interfaces.
Availability
LT1469ACDF-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 industrial and test equipment lifecycles.
Supply support for LT1469ACDF-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 technologies, serving precision instrumentation, industrial automation, and communications markets.
The LT1469 family was designed by Linear Technology (now ADI) specifically for 16-bit data conversion signal chains-balancing decompensated speed, DC accuracy, and inverting-input bias optimization to eliminate DAC interface errors.
FAQ
What is the operating temperature range for LT1469ACDF-2#PBF?
The LT1469ACDF-2#PBF is specified for operation from 0°C to 70°C. This commercial-grade temperature range is explicitly defined in the ordering information table and confirmed in the Electrical Characteristics section for the "LT1469A, DF Package" grade. It is not rated for –40°C to 85°C operation-those conditions apply only to the "I" grade variants (e.g., LT1469AIDF-2#PBF).
Is LT1469ACDF-2#PBF unity-gain stable?
No, LT1469ACDF-2#PBF is decompensated and requires a minimum closed-loop gain of 2 (AV ≥ 2, including AV = –1) for stability. Attempting unity-gain operation will cause oscillation. The datasheet explicitly states "Stable in Gain AV ≥ 2 (AV = –1)" and warns that the unity-gain stable version is the standard LT1469, not the -2 suffix variant.
What is the function of Pin 13 on the LT1469ACDF-2#PBF DFN package?
Pin 13 is the exposed thermal pad on the bottom of the LT1469ACDF-2#PBF DFN package, and it must be connected to the V– (negative supply) rail. The datasheet's "PIN CONFIGURATION" diagram and "PACKAGE DESCRIPTION" section state: "EXPOSED PAD (PIN 13) IS GND, MUST BE CONNECTED TO V–". This connection is essential for thermal dissipation and electrical reference integrity.
How does LT1469ACDF-2#PBF achieve low distortion in ADC buffer applications?
LT1469ACDF-2#PBF achieves –96.5 dB THD at 100 kHz and 10 VP-P through high open-loop gain (>300 V/mV), low input noise (5 nV/√Hz), and symmetrical slew rate (30 V/µs). Its 200 MHz GBW ensures >80 dB loop gain at 100 kHz, suppressing nonlinearities from feedback network imperfections and enabling full 16-bit AC+DC fidelity in ADC driver stages.
Can LT1469ACDF-2#PBF be used with ±5V supplies?
Yes, LT1469ACDF-2#PBF is fully specified for operation on ±5V supplies. Key parameters-including input offset voltage (200 µV max), slew rate (22 V/µs), gain bandwidth (190 MHz), and output swing (±2.8 V into 2 kΩ)-are all guaranteed at ±5V per the Electrical Characteristics tables. Its minimum supply voltage is ±4.5 V, making it compatible with modern low-voltage precision systems.
LT1469ACDF-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:
- 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:
- 12-DFN (4x4)
LT1469ACDF-2#PBF FAQ
1.How can I place an order for LT1469ACDF-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469ACDF-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 LT1469ACDF-2#PBF reliable?
The price and inventory of LT1469ACDF-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 LT1469ACDF-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1469ACDF-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469ACDF-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469ACDF-2#PBF?
LT1469ACDF-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469ACDF-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 LT1469ACDF-2#PBF?
For technical support, including LT1469ACDF-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469ACDF-2#PBF requirements.
6.How does Aetrix verify that LT1469ACDF-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1469ACDF-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 LT1469ACDF-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1469ACDF-2#PBF?
All LT1469ACDF-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469ACDF-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 LT1469ACDF-2#PBF part is unused and in its original packaging.
Return procedure for LT1469ACDF-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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