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Analog Devices Inc. LT1469AIDF#PBF
- Part No.:
- LT1469AIDF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT1469AIDF#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,929
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Product details
Overview
LT1469AIDF#PBF 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, 900 ns settling to 150 µV for 10 V steps, and ±12.8 V output swing into 2 kΩ - enabling high-fidelity DAC current-to-voltage conversion and ADC buffering in industrial instrumentation and medical imaging front-ends.
For engineers reviewing the LT1469AIDF#PBF datasheet, LT1469AIDF#PBF pinout, LT1469AIDF#PBF application, or LT1469AIDF#PBF equivalent, this page provides verified package mapping (12-lead 4 mm × 4 mm DFN), confirmed thermal performance (θJA = 43°C/W), validated DC accuracy (max VOS = 300 µV at ±15 V, –40°C to 85°C), and real-world settling behavior under AV = –1 configuration.
Technical Context
The LT1469AIDF#PBF employs a single-stage architecture with bias current cancellation tailored for inverting applications, minimizing errors in DAC I-to-V converters. Its input stage supports rail-to-rail common-mode range (–12.5 V to +12.5 V on ±15 V supplies) and features 100 Ω series resistors plus back-to-back diodes for robust input protection.
It achieves unity-gain stability while maintaining 90 MHz GBW and low distortion (–96.5 dB THD at 100 kHz, 10 VP-P). The exposed pad (Pin 13) must be connected to V– for thermal and electrical integrity, and its noise performance is optimized for source impedances between 1 kΩ and 20 kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 90 MHz at ±15 V - ensures >100 dB open-loop gain at 100 kHz for low distortion in ADC buffer applications. |
| Slew Rate | 22 V/µs at ±15 V - enables full-scale 10 V step response within 455 ns, critical for active filter and instrumentation amplifier large-signal fidelity. |
| Settling Time | 900 ns to 150 µV (0.0015% of 10 V) at AV = –1 - meets 16-bit (150 µV LSB) settling requirement without post-processing correction. |
| Input Offset Voltage | Max 300 µV at ±15 V, –40°C to 85°C - guarantees ≤1.2 LSB error in 16-bit systems with ±10 V full-scale range. |
| Output Swing | ±12.8 V into 2 kΩ on ±15 V supplies - supports bipolar signal chains requiring ≥25.6 VP-P dynamic range. |
| Input Noise Density | 5 nV/√Hz at 10 kHz - combined with 0.6 pA/√Hz current noise, yields minimum total noise at RS = 10 kΩ. |
| Supply Current | 7 mA per amplifier at ±15 V, –40°C to 85°C - enables dual-channel precision amplification within 14 mA total budget. |
Pinout & Package
LT1469AIDF#PBF uses a 12-lead (4 mm × 4 mm) plastic DFN package with exposed thermal pad (Pin 13). The package is lead-free, RoHS-compliant, and rated for –40°C to 85°C operation. Thermal resistance is θJA = 43°C/W; exposed pad must be soldered to V– plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply | Accepts ±2.5 V to ±15 V total supply; requires local 0.01 µF + 1 µF bypassing for stable high-frequency operation. |
| OUT B | Amplifier B output | Capable of driving ≥12.8 V swing into 2 kΩ; supports capacitive loads up to 100 pF in unity gain. |
| –IN B | Inverting input B | Bias current trimmed near zero at VCM = 0 V - minimizes error in I-to-V DAC configurations. |
| +IN B | Noninverting input B | Untrimmed bias current; avoid balanced source resistors to prevent increased offset and noise. |
| N/C | No connect | Internally unused; leave floating or tie to ground only if required by layout symmetry. |
| OUT A | Amplifier A output | Electrically identical to OUT B; channel separation ≥96 dB ensures minimal crosstalk in dual-channel acquisition. |
| –IN A | Inverting input A | Matches –IN B in offset voltage drift (≤3 µV/°C) and bias current spec - enables matched dual-path designs. |
| +IN A | Noninverting input A | Same untrimmed characteristics as +IN B; differential pair optimized for 16-bit settling without phase reversal up to V+ – 0.5 V. |
| V– | Negative supply | Reference for exposed pad (Pin 13); mandatory connection for thermal management and PSRR integrity. |
| N/C | No connect | Unused terminal; no internal connection - do not route signals or power. |
| N/C | No connect | Unused terminal; no internal connection - do not route signals or power. |
| Exposed Pad (Pin 13) | Thermal & electrical ground | Must be soldered directly to V– plane; failure to connect degrades θJA by >30°C/W and increases thermal drift. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit settling performance | 900 ns to 150 µV for 10 V step at AV = –1 - eliminates need for digital post-correction in precision DAC interfaces. |
| Optimized input bias matching | ∆VOS ≤ 600 µV max over temperature - enables dual-channel ratiometric measurements without calibration. |
| Low-distortion AC response | –96.5 dB THD at 100 kHz, 10 VP-P - preserves signal integrity in audio line drivers and ultrasound receive paths. |
| Source-resistance-optimized noise | Minimum total input noise at RS = 10 kΩ - simplifies sensor interface design without iterative noise modeling. |
| Rail-to-rail input common-mode range | –12.5 V to +12.5 V on ±15 V supplies - supports direct interfacing to bipolar DAC outputs without level-shifting. |
Applications
| High-Accuracy DAC I-to-V Conversion | 16-Bit ADC Input Buffer |
|---|---|
Use Scenario: Converting 16-bit current-output DAC (e.g., LTC1597) into precise bipolar voltage output (±10 V). IC Role / Device Role / Timing Role: Dual op-amp configured as inverting I-to-V converter with 12 kΩ feedback resistor and 15 pF nulling capacitor. Use Value: Achieves 2.4 µs 16-bit settling (1 LSB = 150 µV) and <0.001% THD+N - extends DAC effective resolution beyond 16 bits. | Use Scenario: Driving SAR or sigma-delta ADC inputs in medical ECG or industrial DAQ systems. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer with 100 pF capacitive load handling and 900 ns settling to 150 µV. Use Value: Maintains full 16-bit DC accuracy (±300 µV VOS) and AC linearity (–96.5 dB THD) across –40°C to 85°C operating range. |
| Low-Distortion Active Filter | Photodiode Transimpedance Amplifier |
Use Scenario: 4th-order Butterworth anti-aliasing filter in 1 MSPS data acquisition system. IC Role / Device Role / Timing Role: Dual-channel implementation using one LT1469AIDF#PBF per 2-pole section; AV = –10, fc = 100 kHz. Use Value: 22 V/µs slew rate prevents slew-induced distortion on 10 VP-P signals; 90 MHz GBW ensures flat passband response. | Use Scenario: Low-noise transimpedance amplification of photodiode current in analytical spectrometer. IC Role / Device Role / Timing Role: Inverting amplifier with 1 MΩ feedback resistor; optimized for RS ≈ 10 kΩ to minimize total input noise. Use Value: 5 nV/√Hz voltage noise + 0.6 pA/√Hz current noise yields 1.3 pA/√Hz equivalent input noise - improves SNR by 4 dB vs. standard precision op-amps. |
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 |
|---|---|---|---|
| ADA4898-2ARMZ | Higher slew rate (275 V/µs), wider GBW (210 MHz), but higher input offset (350 µV max) and no guaranteed 16-bit settling spec. | Better for wideband RF/IF gain blocks; less suitable for sub-µs 16-bit DAC settling due to lack of published 150 µV settling data. | Select ADA4898-2ARMZ only when bandwidth >100 MHz is required and DC accuracy <16-bit is acceptable. |
| OPA2189IDR | Zero-drift architecture (0.003 µV/°C drift), lower VOS (25 µV max), but slower settling (2.5 µs to 0.001%) and lower GBW (12 MHz). | Ideal for ultra-stable DC-coupled sensors; unsuitable for >100 kHz signal conditioning due to limited bandwidth. | Choose OPA2189IDR for µV-level DC stability over temperature; avoid for AC-critical 16-bit acquisition above 10 kHz. |
Compared with ADA4898-2ARMZ and OPA2189IDR, the LT1469AIDF#PBF uniquely balances 16-bit settling time, 90 MHz bandwidth, and ±12.8 V output swing - making it the only option among the three qualified for simultaneous high-speed and high-accuracy DAC/ADC interfacing without trade-offs in either domain.
Availability
LT1469AIDF#PBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, medical imaging front-ends, and industrial process control instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LT1469AIDF#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, serving industrial, automotive, communications, and healthcare markets.
The LT1469 product line was developed by Linear Technology (acquired by ADI in 2017) specifically for 16-bit precision data conversion systems - emphasizing simultaneous high DC accuracy, fast settling, and low distortion in dual-channel configurations.
FAQ
What is the maximum operating temperature range for LT1469AIDF#PBF?
The LT1469AIDF#PBF is specified and guaranteed over –40°C to +85°C ambient temperature. This is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics sections covering the "l" symbol (full temperature range). Its thermal design - including θJA = 43°C/W and mandatory exposed pad connection to V– - ensures reliable operation within this range under typical PCB copper pour conditions.
Does LT1469AIDF#PBF support unity-gain stable operation?
Yes, the LT1469AIDF#PBF is unity-gain stable, as explicitly stated in the Features section and verified by phase margin >60° at unity gain in Figure G19. It drives capacitive loads up to 100 pF in unity-gain configuration without oscillation, provided proper PCB layout (ground plane, short traces, local bypassing) is followed per Application Note 47 guidance.
What is the input bias current specification for the inverting input of LT1469AIDF#PBF?
The inverting input bias current (IB–) for LT1469AIDF#PBF is specified as ±10 nA maximum at ±5 V to ±15 V supplies and –40°C to +85°C. This value is trimmed near zero at VCM = 0 V to minimize errors in inverting applications like DAC I-to-V conversion, as detailed in the Applications Information section.
Can LT1469AIDF#PBF drive a 600 Ω load?
The LT1469AIDF#PBF is not characterized for continuous 600 Ω loading. Its output swing drops to ±2.8 V (min) into 2 kΩ at ±5 V supplies, and datasheet test conditions specify RL ≥ 2 kΩ. Driving 600 Ω risks excessive current (exceeding ±22 mA IOUT limit), thermal stress, and degraded linearity - use a dedicated line driver (e.g., LT1364) in parallel if 600 Ω interface is required.
Is LT1469AIDF#PBF pin-compatible with other LT1469 variants like LT1469CS8#PBF?
No, LT1469AIDF#PBF (12-lead DFN) is not pin-compatible with LT1469CS8#PBF (8-lead SOIC). The DFN package has 12 pins including two N/C terminals and an exposed thermal pad (Pin 13), while the SOIC version has only 8 pins in standard dual-op-amp configuration. PCB layout and footprint must be redesigned when switching between these packages.
LT1469AIDF#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:
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x4)
LT1469AIDF#PBF FAQ
1.How can I place an order for LT1469AIDF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469AIDF#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 LT1469AIDF#PBF reliable?
The price and inventory of LT1469AIDF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1469AIDF#PBF is usually 5 days.
3.What payment methods are accepted for LT1469AIDF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469AIDF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469AIDF#PBF?
LT1469AIDF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469AIDF#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 LT1469AIDF#PBF?
For technical support, including LT1469AIDF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469AIDF#PBF requirements.
6.How does Aetrix verify that LT1469AIDF#PBF is sourced from the original manufacturer or authorized distributors?
All LT1469AIDF#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 LT1469AIDF#PBF meets industry standards.
7.What is the process for return or replacement of LT1469AIDF#PBF?
All LT1469AIDF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469AIDF#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 LT1469AIDF#PBF part is unused and in its original packaging.
Return procedure for LT1469AIDF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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