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Analog Devices Inc. LT1469IDF#TRPBF
- Part No.:
- LT1469IDF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT1469IDF#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,257
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Product details
Overview
LT1469IDF#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 ±15 V or ±5 V systems.
For engineers reviewing the LT1469IDF#TRPBF datasheet, LT1469IDF#TRPBF pinout, LT1469IDF#TRPBF application, or LT1469IDF#TRPBF equivalent, this page provides verified DC accuracy (max 300 µV VOS, 3 µV/°C drift), AC performance (–96.5 dB THD at 100 kHz), package-specific thermal data (θJA = 43°C/W), and validated alternatives for bipolar-output instrumentation designs.
Technical Context
The LT1469IDF#TRPBF employs a single-stage architecture with bias current cancellation tailored for inverting configurations, minimizing errors in DAC I-to-V converters. Its input stage supports rail-to-rail common-mode range (±12.5 V on ±15 V supplies) and features 100 Ω series resistors plus back-to-back diodes for robust input protection.
Designed for unity-gain stability, it achieves 90 MHz GBW and 350 kHz full-power bandwidth at ±15 V, with channel separation >96 dB and low total input noise (5 nV/√Hz voltage noise, 0.6 pA/√Hz current noise) 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 high open-loop gain up to 100 kHz for distortion reduction in ADC buffers. |
| Slew Rate | 22 V/µs - enables fast large-signal response in active filters and instrumentation amplifiers without slewing artifacts. |
| Settling Time | 900 ns to 150 µV (0.01% of 10 V step) - meets timing requirements for 16-bit DAC output settling in <1 µs. |
| Input Offset Voltage | Max 300 µV at ±15 V, –40°C to 85°C - guarantees sub-LSB error in 16-bit (≈15 µV LSB) bipolar systems. |
| THD + Noise | –96.5 dB at 100 kHz, 10 VP-P - preserves signal fidelity in audio line drivers and precision sensor interfaces. |
| Supply Current | 7 mA per amplifier at ±15 V - balances speed and power for dual-channel industrial signal conditioning. |
| Input Noise Density | 5 nV/√Hz voltage noise + 0.6 pA/√Hz current noise - optimized for 1 kΩ–20 kΩ source impedances in transimpedance applications. |
Pinout & Package
LT1469IDF#TRPBF uses a 12-lead 4 mm × 4 mm plastic DFN (DF package) with exposed pad (Pin 13) requiring connection to V– for thermal and electrical integrity. θJA = 43°C/W enables high-density PCB layouts without forced air cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply | Accepts ±5 V or ±15 V operation; must be bypassed with 0.01 µF + 1 µF capacitors near pin. |
| OUT B | Amplifier B output | Drives loads down to 2 kΩ with ±12.8 V swing; supports capacitive loads up to 300 pF at AV = –1. |
| –IN B | Inverting input B | Bias current trimmed at 0 V CM; optimized for I-to-V converter accuracy with matched feedback networks. |
| +IN B | Noninverting input B | Untrimmed bias current; requires guard ring in high-impedance noninverting configurations. |
| N/C | No connect | Internally unused; must remain unconnected per datasheet layout guidance. |
| N/C | No connect | Internally unused; no routing or grounding recommended. |
| OUT A | Amplifier A output | Electrically identical to OUT B; enables dual-channel synchronous signal processing. |
| –IN A | Inverting input A | Matches –IN B characteristics; supports independent dual DAC I-to-V conversion paths. |
| +IN A | Noninverting input A | Same untrimmed behavior as +IN B; avoid balanced source resistors to prevent DC accuracy degradation. |
| V– | Negative supply | Reference for exposed pad (Pin 13); mandatory connection for thermal management and PSRR compliance. |
| N/C | No connect | Internally unused; leave floating per DF package specification. |
| N/C | No connect | Internally unused; no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit settling performance | 900 ns to 150 µV ensures accurate digitization of fast-stepping DAC outputs without post-processing correction. |
| Optimized input bias matching | ΔIB– ≤ 18 nA over temperature enables stable DC gain in inverting transimpedance stages. |
| Low-distortion unity-gain stability | Phase margin >82° across supply and temperature ensures reliable operation in buffer configurations without external compensation. |
| Thermally enhanced DFN package | Exposed pad tied to V– reduces junction-to-board thermal resistance by >50% vs SO-8, supporting continuous 7 mA/channel operation. |
| Total input noise optimization | Minimum integrated noise at RS = 10 kΩ allows direct interfacing with photodiode or strain gauge bridges without noise penalty. |
Applications
| 16-Bit DAC Current-to-Voltage Converter | ADC Buffer for High-Speed Data Acquisition |
|---|---|
Use Scenario: Converting 16-bit current-output DAC (e.g., LTC1597) into precise ±10 V bipolar analog voltage with minimal settling error. IC Role / Device Role / Timing Role: Dual op-amp configured as matched I-to-V converters with 15 pF nulling capacitor across 12 kΩ feedback resistor. Use Value: Achieves 2.4 µs 16-bit settling (vs theoretical 2 µs limit), enabling >400 kSPS effective sampling in closed-loop control systems. | Use Scenario: Driving SAR or sigma-delta ADC inputs in industrial PLC analog input modules requiring full 16-bit DC + AC accuracy. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer isolating multiplexer output from ADC sample capacitor, maintaining CMRR >92 dB at 100 kHz. Use Value: Delivers –96.5 dB THD at 100 kHz while preserving DC offset accuracy (<300 µV), eliminating calibration drift in field-deployed equipment. |
| Low-Distortion Active Filter | Photodiode Transimpedance Amplifier |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter preceding 1 MSPS ADC in medical imaging front-ends. IC Role / Device Role / Timing Role: Dual-channel configuration realizing cascaded 2nd-order sections with matched GBW and phase margin. Use Value: Maintains <0.01% passband flatness to 100 kHz and –90 dB stopband rejection due to 90 MHz GBW and low inter-channel crosstalk (>96 dB). | Use Scenario: Amplifying low-level photocurrent (nA range) from high-capacitance photodiodes in spectrophotometer optical channels. IC Role / Device Role / Timing Role: Inverting transimpedance amplifier with 10 kΩ–100 kΩ feedback, leveraging trimmed –IN bias current for dark-current rejection. Use Value: Achieves 5 nV/√Hz input-referred noise floor and 100 pF capacitive load drive capability, enabling sub-picoamp resolution at 1 kHz bandwidth. |
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 |
|---|---|---|---|
| OPA2189IDR | Zero-drift architecture (0.003 µV/°C drift), lower VOS (12 µV max), but lower GBW (12 MHz) and slew rate (5.5 V/µs) | Better for ultra-stable DC-coupled sensors; unsuitable for >100 kHz signal conditioning or fast DAC settling | Select OPA2189IDR only when sub-µV/°C drift dominates over AC performance requirements. |
| ADA4898-2ARMZ | Higher slew rate (275 V/µs), wider GBW (210 MHz), but higher VOS (300 µV max) and noise (1.1 nV/√Hz) | Preferred for video or RF IF buffering; lacks 16-bit settling validation and matched bias current for DAC I-to-V | Choose ADA4898-2ARMZ when bandwidth >100 MHz is critical and DC precision is secondary to speed. |
Compared with OPA2189IDR and ADA4898-2ARMZ, LT1469IDF#TRPBF uniquely balances 16-bit DC accuracy (300 µV VOS, 3 µV/°C), 90 MHz GBW, and 900 ns settling - making it the only option validated for simultaneous high-resolution and high-speed data acquisition in single-supply-compatible dual-channel topologies.
Availability
LT1469IDF#TRPBF is available at Aetrix Electronics and suitable for precision instrumentation, high-accuracy data acquisition systems, and 16-bit DAC interface circuits requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for LT1469IDF#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, serving industrial, automotive, communications, and healthcare markets.
The LT1469IDF#TRPBF belongs to ADI's legacy Linear Technology precision op amp product line, engineered specifically for applications demanding simultaneous 16-bit DC accuracy and 90+ MHz AC performance - such as metrology-grade data converters and high-fidelity test equipment.
FAQ
What is the maximum operating temperature range for LT1469IDF#TRPBF?
The LT1469IDF#TRPBF is rated for operation from –40°C to +85°C, with all key specifications (including input offset voltage, slew rate, and gain bandwidth) guaranteed across this full industrial temperature range. The device uses a thermally enhanced 12-lead DFN package with an exposed pad that must be soldered to V– to maintain junction temperature below 150°C under continuous 7 mA per amplifier load.
Does LT1469IDF#TRPBF support ±5 V operation, and how does performance compare to ±15 V?
Yes, LT1469IDF#TRPBF is fully specified for both ±5 V and ±15 V supplies. At ±5 V, its slew rate drops to 17 V/µs (vs 22 V/µs at ±15 V), gain bandwidth reduces to 88 MHz (vs 90 MHz), and output swing decreases to ±2.8 V into 2 kΩ (vs ±12.8 V). However, THD remains –96.5 dB at 100 kHz, and settling time holds at 900 ns - making it viable for low-voltage portable instrumentation where power efficiency is critical.
Can LT1469IDF#TRPBF drive capacitive loads, and what is the maximum value?
LT1469IDF#TRPBF can directly drive up to 100 pF in unity-gain configuration and up to 300 pF in inverting gain-of–1 configuration. For larger loads, a small series resistor (RO ≥ (1 + RF/RG)/(2 • CL • 5 MHz)) must be added between output and load, along with a feedback capacitor (CF = (2RO/RF)CL) from output to inverting input - as detailed in Figure 3 of the datasheet. This maintains stability without degrading 16-bit settling performance.
How is input bias current managed in LT1469IDF#TRPBF for inverting applications?
LT1469IDF#TRPBF features active bias current cancellation at the inverting input (–IN), trimmed at 0 V common-mode voltage to minimize DC errors in I-to-V converters. Maximum inverting input bias current is ±10 nA at ±15 V, with drift ≤40 pA/°C. The noninverting input (+IN) is untrimmed (±40 nA max), so balanced source resistors are explicitly discouraged - they increase noise and degrade DC accuracy rather than improve it.
Is LT1469IDF#TRPBF pin-compatible with other packages in the LT1469 family?
No, LT1469IDF#TRPBF (12-lead DFN) is not pin-compatible with the 8-lead SO-8 (S8) or PDIP (N8) variants. The DF package has dedicated N/C pins and places V+ and V– on opposite corners, whereas S8/N8 use standard dual-op-amp pinouts (e.g., Pin 4 = V–, Pin 8 = V+). Layout redesign is required when migrating to or from the DF package, though electrical specifications and functional behavior remain consistent across all variants.
LT1469IDF#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:
- 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)
LT1469IDF#TRPBF FAQ
1.How can I place an order for LT1469IDF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1469IDF#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 LT1469IDF#TRPBF reliable?
The price and inventory of LT1469IDF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1469IDF#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1469IDF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1469IDF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1469IDF#TRPBF?
LT1469IDF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1469IDF#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 LT1469IDF#TRPBF?
For technical support, including LT1469IDF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1469IDF#TRPBF requirements.
6.How does Aetrix verify that LT1469IDF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1469IDF#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 LT1469IDF#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1469IDF#TRPBF?
All LT1469IDF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1469IDF#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 LT1469IDF#TRPBF part is unused and in its original packaging.
Return procedure for LT1469IDF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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