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Analog Devices Inc. LT1464CS8#PBF
- Part No.:
- LT1464CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1464CS8#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:690
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Product details
Overview
LT1464CS8#PBF from Analog Devices (formerly Linear Technology) is a dual JFET-input micropower operational amplifier optimized for ultra-low input bias current (≤20 pA max), 1 MHz gain bandwidth, and unity-gain stability with capacitive loads up to 10 nF. It operates from ±5 V or ±15 V supplies, delivers ±13.7 V output swing into 10 kΩ, and is used in photocurrent amplification, low-frequency active filters, and battery-powered precision signal conditioning.
For engineers reviewing the LT1464CS8#PBF datasheet, LT1464CS8#PBF pinout, LT1464CS8#PBF application, or LT1464CS8#PBF equivalent, key selection criteria include picoampere-level input bias current, C-load drive capability, rail-to-rail input common-mode range (including positive rail), guaranteed matching specs between amplifiers, and SO-8 package compatibility with legacy designs.
Technical Context
The LT1464CS8#PBF employs JFET input stages with guarded inputs and laser-trimmed resistor networks to achieve 20 pA maximum input bias current and 0.5 mV maximum input offset voltage at 25°C. Its internal compensation ensures stable operation with capacitive loads up to 10 nF without external compensation-critical for track-and-hold and peak detector circuits.
It features matched amplifier pairs with guaranteed offset voltage match ≤3.3 mV and noninverting bias current match ≤30 pA over temperature, enabling high-precision differential and instrumentation configurations. The device is fully specified across –40°C to 85°C and supports both ±5 V and ±15 V supply operation with 100% tested slew rate (≥0.5 V/µs) and gain bandwidth product (≥650 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ≤20 pA max at 25°C - enables accurate integration and femtoampere-level photocurrent measurement |
| Gain Bandwidth Product | 1 MHz typ - supports stable closed-loop operation up to ~100 kHz with moderate gain |
| Slew Rate | 0.9 V/µs typ - sufficient for low-distortion signal conditioning of sub-100 kHz waveforms |
| Supply Current per Amp | 200 µA max - allows dual-channel operation on <500 µA total, ideal for battery life extension |
| Input Common-Mode Range | Includes positive rail - simplifies single-supply sensor interface design without level-shifting |
| Capacitive Load Drive | Stable with up to 10 nF - eliminates need for isolation resistors in ADC driver or filter applications |
| Output Voltage Swing | ±13.7 V into 10 kΩ @ ±15 V - delivers >90% of rail-to-rail dynamic range for high-fidelity analog output |
Pinout & Package
LT1464CS8#PBF is housed in an 8-lead plastic SOIC (SO-8) package, 0.150-inch wide, with standard dual op amp pinout compatible with industry references. Pin 1 is V+, pin 2 is –IN B, pin 3 is +IN B, pin 4 is V–, pin 5 is +IN A, pin 6 is –IN A, pin 7 is OUT A, and pin 8 is OUT B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (V+) | Positive Supply Rail | Accepts +5 V or +15 V; must be decoupled locally to minimize noise coupling into high-Z inputs |
| Pin 2 (–IN B) | Inverting Input of Amplifier B | High-impedance node; guard ring routing recommended for leakage-sensitive PCB layouts |
| Pin 3 (+IN B) | Noninverting Input of Amplifier B | Includes positive rail in common-mode range; usable as reference buffer or rail-sensing input |
| Pin 4 (V–) | Negative Supply Rail | Accepts –5 V or –15 V; shared return path requires low-impedance ground plane under IC |
| Pin 5 (+IN A) | Noninverting Input of Amplifier A | Matched to Pin 3 for differential pair use; offset match ≤3.3 mV supports precision instrumentation |
| Pin 6 (–IN A) | Inverting Input of Amplifier A | Guarded internally; bias current match ≤30 pA enables low-drift transimpedance configurations |
| Pin 7 (OUT A) | Output of Amplifier A | Capable of driving 10 nF directly; output impedance <1 Ω below 100 Hz per TPC15 data |
| Pin 8 (OUT B) | Output of Amplifier B | Electrically isolated from OUT A; channel separation >132 dB at 10 Hz minimizes crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Picoampere input bias current | 20 pA max ensures <1 µV error in 50 MΩ feedback networks, critical for photodiode amps |
| C-Load™ unity-gain stability | Guaranteed stable with 10 nF load - removes need for output series resistor in ADC driver stage |
| Matched dual amplifier pair | Offset match ≤3.3 mV and bias current match ≤30 pA enable high-CMRR difference amplifiers |
| Rail-inclusive input common-mode range | Operates with inputs up to V+ - eliminates level shifters in single-ended sensor interfaces |
| Micropower operation | 200 µA per amplifier allows dual-channel precision analog front-end on <1 mA total supply |
Applications
| Photocurrent Amplification | Battery-Powered Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying nanoampere-level current from photodiodes in portable spectrometers or pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 GΩ feedback resistor, leveraging ultra-low input bias current to avoid signal loss. Use Value: Enables 0.1 pA resolution with <0.5 mV offset error-directly traceable to 20 pA IB spec and 0.8 mV VOS max. |
Use Scenario: Low-drift, low-power signal conditioning for thermistor or strain gauge bridges in handheld test equipment. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end, using matched offsets and bias currents to reject common-mode drift. Use Value: Achieves <10 µV/°C system offset drift via 7 µV/°C ∆VOS spec and matched amplifier topology. |
| Low-Frequency Active Filtering | Low-Droop Track-and-Hold Circuits |
|
Use Scenario: 4th-order Chebyshev lowpass filtering at 16 Hz cutoff in ECG front-ends, requiring high-Z passive component compatibility. IC Role / Device Role / Timing Role: Dual op amp implementing Sallen-Key and multiple-feedback topologies with high-value resistors (>200 kΩ). Use Value: Supports 237 kΩ resistors without bias current-induced gain error-enabled by ≤20 pA IB and 10¹² Ω input resistance. |
Use Scenario: Sample-and-hold stage in precision data acquisition systems where droop must remain <0.05 mV/s during hold phase. IC Role / Device Role / Timing Role: Buffer and hold amplifier in conjunction with LTC201 switch, minimizing charge injection and leakage errors. Use Value: Delivers typical droop of 0.05 mV/s per TA01, directly enabled by 0.5 pA input bias and guarded input structure. |
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 |
|---|---|---|---|
| LT1462CS8#PBF | 28 µA supply current per amp (vs. 200 µA), 175 kHz GBW (vs. 1 MHz), drives 10 µF (vs. 10 nF) | Better for ultra-low-power, low-bandwidth (<10 kHz) applications; unsuitable for 100 kHz signal paths or fast settling | Select LT1462CS8#PBF only when supply current <60 µA is mandatory and bandwidth ≤200 kHz suffices. |
| OPA2141AIDR | 1.8 MHz GBW, 11 V/µs slew rate, 0.25 pA IB (typ), but not C-load stable beyond 100 pF without compensation | Higher speed and lower noise, but requires external compensation for >100 pF loads-increasing BOM count and layout complexity | Choose OPA2141AIDR when bandwidth >500 kHz is needed and capacitive load ≤100 pF; avoid if driving ADC input caps directly. |
Compared with LT1462CS8#PBF, LT1464CS8#PBF trades 7× higher supply current for 6× greater bandwidth and direct 10 nF drive capability; versus OPA2141AIDR, it sacrifices speed and noise performance for guaranteed C-load stability and simpler layout-making it optimal for precision, medium-speed, high-impedance analog signal chains.
Availability
LT1464CS8#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, photocurrent amplification, and low-frequency active filtering requiring stable component supply and long-term obsolescence management.
Supply support for LT1464CS8#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 acquired Linear Technology in 2017 and maintains full production, testing, and documentation for legacy Linear op amp families including the LT146x series.
The LT1464 product line was designed specifically for micropower, ultra-low-input-bias-current precision analog signal conditioning in space-constrained, battery-operated, or high-impedance sensor interface applications.
FAQ
What is the maximum capacitive load the LT1464CS8#PBF can drive without oscillation?
The LT1464CS8#PBF is unity-gain stable with capacitive loads up to 10 nF, as verified in TPC13 and TA01. This C-Load™ capability eliminates the need for isolation resistors in ADC driver or filter applications. Stability is guaranteed across temperature and supply voltage ranges; loads exceeding 10 nF require external compensation per Figure 10 in the datasheet. The LT1464CS8#PBF achieves this via internal compensation tailored for high-Z nodes.
Does the LT1464CS8#PBF support single-supply operation?
Yes-the LT1464CS8#PBF supports single-supply operation because its input common-mode range includes the positive rail (V+), and output swings within 1.3 V of both rails. For example, with +5 V and ground supplies, it accepts inputs up to +5 V and delivers outputs from ~0.3 V to ~4.7 V into 10 kΩ. However, the datasheet specifies performance with dual ±5 V or ±15 V supplies; single-supply use requires verifying VOS, CMRR, and PSRR at the intended operating point. The LT1464CS8#PBF retains its 20 pA IB and 1 MHz GBW under these conditions.
How does the LT1464CS8#PBF prevent phase reversal when inputs exceed the common-mode range?
The LT1464CS8#PBF uses proprietary input stage protection that prevents phase reversal even when inputs exceed the negative rail or approach the positive rail-unlike many legacy JFET op amps. As shown in Figure 1c of the datasheet, it maintains correct polarity under ±5.2 V sine input with ±5 V supplies. This behavior stems from internal clamping and biasing architecture, not external components. Phase reversal immunity is inherent to the LT1464CS8#PBF silicon design and applies across the full –40°C to 85°C temperature range.
What is the guaranteed input offset voltage match between the two amplifiers in the LT1464CS8#PBF?
The LT1464CS8#PBF guarantees offset voltage match ≤3.3 mV between its two amplifiers at ±15 V supplies and 25°C (per Electrical Characteristics table). At –40°C to 85°C, the match degrades to ≤4.0 mV max. This matching is achieved through laser trimming and process control, and is explicitly tested-not derived from typical distributions. The LT1464CS8#PBF's matched specs enable precision differential amplifiers and low-drift instrumentation topologies without external calibration.
Is the LT1464CS8#PBF RoHS compliant and lead-free?
Yes-the "#PBF" suffix in LT1464CS8#PBF denotes lead-free (Pb-free) and RoHS-compliant packaging per Analog Devices' product marking convention. The SO-8 package uses matte tin lead finish, and the device meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) requirements. Full compliance documentation-including substance declarations and test reports-is available via Analog Devices' product page for LT1464CS8#PBF under part number ordering information.
LT1464CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1464CS8#PBF FAQ
1.How can I place an order for LT1464CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1464CS8#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 LT1464CS8#PBF reliable?
The price and inventory of LT1464CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1464CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1464CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1464CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1464CS8#PBF?
LT1464CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1464CS8#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 LT1464CS8#PBF?
For technical support, including LT1464CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1464CS8#PBF requirements.
6.How does Aetrix verify that LT1464CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1464CS8#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 LT1464CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1464CS8#PBF?
All LT1464CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1464CS8#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 LT1464CS8#PBF part is unused and in its original packaging.
Return procedure for LT1464CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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