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Analog Devices Inc. LT1464ACN8#PBF
- Part No.:
- LT1464ACN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1464ACN8#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,239
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Product details
Overview
LT1464ACN8#PBF from Analog Devices (acquired Linear Technology) is a dual micropower JFET-input operational amplifier optimized for ultra-low input bias current (0.5pA typ, 2pA max), 1MHz gain bandwidth, and unity-gain stability with up to 10nF capacitive loads. It operates from ±5V or ±15V supplies, delivers ±13.5V output swing into 10kΩ, and targets precision photocurrent amplification and low-droop track-and-hold circuits in battery-powered instrumentation.
For engineers reviewing the LT1464ACN8#PBF datasheet, LT1464ACN8#PBF pinout, LT1464ACN8#PBF application, or LT1464ACN8#PBF equivalent, key selection criteria include guaranteed picoampere bias current over temperature, matching specifications between amplifiers, C-load drive capability without external compensation, and compatibility with ±5V/±15V supply rails in high-impedance sensor front-ends.
Technical Context
The LT1464ACN8#PBF employs JFET input stage architecture enabling 0.5pA typical input bias current and 10¹²Ω differential input resistance. Its internal compensation ensures unconditional unity-gain stability with capacitive loads up to 10nF - a critical feature for photodiode transimpedance and sample-hold applications where stray capacitance is unavoidable.
It features rail-to-rail input common-mode range including the positive supply, 0.9V/µs slew rate, and full matching specifications (e.g., 0.8mV max offset voltage match, 0.5pA noninverting bias current match) across both amplifiers - enabling precision dual-channel signal conditioning without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 0.5pA typ / 2pA max at 25°C - enables accurate amplification of sub-picoamp photocurrents without significant error. |
| Gain Bandwidth Product | 1MHz typ - supports stable closed-loop operation up to ~100kHz in unity-gain configuration with 10nF load. |
| Supply Current per Amp | 200µA max - allows dual-amplifier operation from coin-cell batteries for multi-year portable device life. |
| Input Common-Mode Range | Includes positive rail (V+) - simplifies interfacing with sensors referenced to V+ in single-supply derived systems. |
| Output Voltage Swing | ±13.5V into 10kΩ @ ±15V - delivers >90% rail-to-rail dynamic range for high-fidelity analog signal capture. |
| Unity-Gain Stable Load | Up to 10nF capacitive load - eliminates need for isolation resistors in photodiode or piezoelectric sensor interfaces. |
| Offset Voltage Match | 0.8mV max (VS = ±15V) - ensures matched DC performance in dual-path instrumentation and differential measurement topologies. |
Pinout & Package
LT1464ACN8#PBF is housed in an 8-lead PDIP (N8) package with 0.300-inch width, RoHS-compliant lead finish, and through-hole mounting. Pin 1 is marked by notch or dot; leads are tin-lead (SnPb) or matte tin per ordering option.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN A | Noninverting input of Amplifier A - high-impedance node requiring guarded layout to preserve picoampere bias performance. |
| 2 | –IN A | Inverting input of Amplifier A - used for feedback connection in transimpedance or inverting configurations. |
| 3 | OUT A | Output of Amplifier A - capable of driving ≥10kΩ load to within 1.5V of either supply rail. |
| 4 | V– | Negative supply pin - must be decoupled locally with ≥0.1µF ceramic capacitor to minimize noise coupling. |
| 5 | V+ | Positive supply pin - shared supply for both amplifiers; requires local 0.1µF ceramic + 10µF tantalum decoupling. |
| 6 | –IN B | Inverting input of Amplifier B - electrically isolated from Amplifier A; matching specs apply vs. –IN A. |
| 7 | +IN B | Noninverting input of Amplifier B - identical bias current and CMRR characteristics as +IN A. |
| 8 | OUT B | Output of Amplifier B - independent output stage; channel separation >132dB at 10Hz prevents crosstalk in dual-sensor systems. |
Key Features
| Feature | Design Value |
|---|---|
| Picoampere input bias current | 0.5pA typ ensures <1µV error in 2GΩ transimpedance gain setting - critical for femtoamp-level photocurrent detection. |
| C-Load™ unity-gain stability | Stable with 10nF capacitive load eliminates external compensation components in photodiode and piezo sensor interfaces. |
| Matched dual amplifier pair | 0.8mV max offset match and 0.5pA max noninverting bias current match enable precision differential signal processing without calibration. |
| Rail-inclusive input common-mode range | Accepts inputs up to V+ - simplifies level-shifting in single-supply-derived ±5V systems using charge pumps or regulators. |
| Micropower operation | 200µA per amplifier enables dual-channel precision analog functions in energy-constrained IoT edge nodes and portable medical devices. |
Applications
| Photocurrent Amplification | Low-Droop Track-and-Hold |
|---|---|
Use Scenario: Amplifying output current from silicon photodiodes in spectrophotometers and environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1GΩ–10GΩ feedback resistor, operating in DC-coupled mode with minimal input bias current error. Use Value: 0.5pA typical input bias current limits DC error to <5µV in 10GΩ gain configuration, preserving sub-0.1% linearity over temperature. |
Use Scenario: Capturing and holding slow-varying analog signals (e.g., thermocouple outputs) in data acquisition systems with <0.05mV/s droop. IC Role / Device Role / Timing Role: Buffer amplifier in track-and-hold circuit with 10nF hold capacitor, leveraging C-Load stability to avoid oscillation. Use Value: Guaranteed 10nF capacitive load drive enables direct connection to hold capacitor without series resistor, minimizing droop and settling time. |
| Low-Frequency Active Filters | Battery-Powered Precision Instrumentation |
Use Scenario: Implementing 4th-order Chebyshev lowpass filters (e.g., 16Hz cutoff) in EEG front-ends and vibration monitoring. IC Role / Device Role / Timing Role: Dual op-amp section providing gain, integration, and buffering in passive-active hybrid filter topology. Use Value: 1MHz GBW and 0.9V/µs slew rate support clean 100Hz signal passband with >60dB stopband attenuation and no phase reversal. |
Use Scenario: Signal conditioning in handheld gas analyzers and portable pH meters powered by two AA cells. IC Role / Device Role / Timing Role: Dual-channel sensor interface IC handling reference buffer and measurement amplifier functions simultaneously. Use Value: 200µA per amplifier allows continuous dual-channel operation for >5 years on alkaline batteries, while matching specs reduce calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1462CN8#PBF | 28µA supply current per amp (vs. 200µA), 175kHz GBW, drives 10µF load - lower power but significantly reduced bandwidth and slew rate. | Preferred for ultra-low-power, sub-10kHz applications like long-life environmental monitors; unsuitable for >50kHz track-and-hold or active filtering. | Select LT1462CN8#PBF only when supply current is primary constraint and bandwidth <200kHz suffices. |
| OPA2140AIDR | 1.8MHz GBW, 20V/µs slew rate, 1pA IB (typ), SO-8 package - higher speed and rail-to-rail output, but not specified for 10nF C-load stability. | Better for high-speed precision applications (e.g., 100ksps data loggers); requires external compensation for >1nF capacitive loads. | Choose OPA2140AIDR when bandwidth >500kHz is required and capacitive loading is ≤1nF; verify stability per layout. |
Compared with LT1462CN8#PBF and OPA2140AIDR, the LT1464ACN8#PBF uniquely balances picoampere bias current, 1MHz bandwidth, and guaranteed 10nF C-load stability - making it irreplaceable in precision, moderate-bandwidth, high-impedance sensor interfaces where all three traits are simultaneously required.
Availability
LT1464ACN8#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, photocurrent amplification, and low-droop track-and-hold circuits requiring stable component supply with guaranteed picoampere-level input bias performance across temperature.
Supply support for LT1464ACN8#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) acquired Linear Technology in 2017 and maintains its precision analog portfolio, emphasizing high-performance signal conditioning, power management, and data conversion ICs for industrial, medical, and aerospace applications.
The LT1464 series belongs to Linear Technology's legacy micropower precision op amp product line, specifically engineered for ultra-low-input-bias-current applications in high-impedance sensor signal chains and energy-constrained portable instrumentation.
FAQ
What is the maximum capacitive load the LT1464ACN8#PBF can drive while remaining unity-gain stable?
The LT1464ACN8#PBF is specified for unity-gain stability with up to 10nF capacitive load, as confirmed in the datasheet's "C-Load™" feature and TPC13 phase margin vs. CLOAD plot. This eliminates need for isolation resistors in photodiode transimpedance amplifiers and track-and-hold circuits using standard 10nF polystyrene hold capacitors. Exceeding 10nF may reduce phase margin below 45°, risking oscillation.
Does the LT1464ACN8#PBF support operation from ±5V supplies, and how does performance compare to ±15V?
Yes, the LT1464ACN8#PBF is fully specified for ±5V and ±15V supplies. At ±5V, input bias current is ±0.4pA typ (vs. ±0.5pA at ±15V), supply current is 135–200µA per amp, and output swing is ±3.5V into 2kΩ. All key parameters - including offset voltage match, CMRR, and PSRR - are guaranteed across both supply ranges, enabling flexible design in low-voltage portable systems.
How does the LT1464ACN8#PBF prevent phase reversal when input common-mode voltage exceeds the negative rail?
The LT1464ACN8#PBF uses proprietary input stage design that avoids phase reversal even when common-mode input extends beyond the negative supply rail - a known failure mode in legacy JFET op amps. As shown in Figure 1c of the datasheet, it maintains correct polarity under ±5.2V sine input exceeding the –5V rail, preventing servo lock-up and ensuring robustness in real-world sensor interfaces with transient overvoltage.
What are the guaranteed matching specifications between the two amplifiers in the LT1464ACN8#PBF?
The LT1464ACN8#PBF guarantees amplifier-to-amplifier matching: 0.8mV max offset voltage match, 0.5pA max noninverting bias current match (∆IB+), 74dB min common-mode rejection match (∆CMRR), and 78dB min power supply rejection match (∆PSRR) at ±15V. These are measured between Amplifier A and B and are 100% tested - enabling precision differential circuits without external trimming.
Is the LT1464ACN8#PBF suitable for use in photodiode transimpedance amplifiers, and what layout considerations apply?
Yes, the LT1464ACN8#PBF is ideal for photodiode transimpedance amplifiers due to its 0.5pA typical input bias current, 10¹²Ω input resistance, and 10nF C-load stability. Layout requires guarding the +IN and –IN pins with grounded copper traces, short direct connections to feedback resistor/capacitor, and local 0.1µF ceramic decoupling on V+ and V– pins to minimize leakage paths and noise pickup.
LT1464ACN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.9V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 145µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1464ACN8#PBF FAQ
1.How can I place an order for LT1464ACN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1464ACN8#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 LT1464ACN8#PBF reliable?
The price and inventory of LT1464ACN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1464ACN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1464ACN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1464ACN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1464ACN8#PBF?
LT1464ACN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1464ACN8#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 LT1464ACN8#PBF?
For technical support, including LT1464ACN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1464ACN8#PBF requirements.
6.How does Aetrix verify that LT1464ACN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1464ACN8#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 LT1464ACN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1464ACN8#PBF?
All LT1464ACN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1464ACN8#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 LT1464ACN8#PBF part is unused and in its original packaging.
Return procedure for LT1464ACN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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