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Analog Devices Inc. LT1462ACS8#PBF
- Part No.:
- LT1462ACS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1462ACS8#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:203
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Product details
Overview
LT1462ACS8#PBF from Analog Devices (formerly Linear Technology) is a dual micropower JFET-input operational amplifier with picoampere input bias current (2pA max), 45µA per amplifier supply current, unity-gain stability with up to 10nF capacitive loads, and rail-to-rail input common-mode range including the positive supply rail. It operates from ±5V or ±15V supplies and is specified over –40°C to 85°C for precision sensor signal conditioning in battery-powered instrumentation.
For engineers reviewing the LT1462ACS8#PBF datasheet, LT1462ACS8#PBF pinout, LT1462ACS8#PBF application, or LT1462ACS8#PBF equivalent, key selection criteria include guaranteed 2pA max input bias current at 25°C, 175kHz gain bandwidth product, 0.13V/µs slew rate, SO-8 package compatibility, and matching specifications between amplifiers for differential sensing.
Technical Context
The LT1462ACS8#PBF uses matched JFET input pairs to achieve ultra-low input bias current and high input impedance (>10¹² Ω), enabling accurate amplification of high-impedance sources like photodiodes and piezoelectric sensors. Its internal compensation ensures stable operation with capacitive loads up to 10nF without external compensation.
It features full rail-to-rail input common-mode range (including V+), output swing to within 1.5V of either supply on 10kΩ load, and 100% tested slew rate (0.08V/µs min) and gain bandwidth product (125kHz min) across temperature. Matching specs-including offset voltage match (0.5mV typ), bias current match (0.4pA typ), and CMRR/PSRR match-are guaranteed for dual-channel correlation in precision instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 2pA max at 25°C - enables direct interfacing with >1GΩ source impedances without significant DC error |
| Supply Current per Amp | 45µA max - supports multi-year battery life in portable gas sensors and data loggers |
| Gain Bandwidth Product | 175kHz typ - sufficient for low-frequency biosignal amplification (ECG, EEG) and slow-scan transducer outputs |
| Slew Rate | 0.13V/µs typ - adequate for <10kHz small-signal step response with minimal distortion |
| Unity-Gain Stable C-Load | Up to 10nF - allows direct driving of ADC input capacitors or long cables without oscillation |
| Input Common-Mode Range | Includes positive rail - supports single-supply sensor interfaces where signal swings near VCC |
| Offset Voltage Match | 0.5mV typ (VS = ±5V) - critical for precision differential amplifiers and bridge measurement front-ends |
Pinout & Package
LT1462ACS8#PBF is housed in an 8-lead plastic SOIC (SO-8) package with standard dual op amp pinout and 1.27mm lead pitch. Thermal resistance is θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B | High-impedance JFET input node for second amplifier channel; accepts signals up to V+ |
| 2 | Non-inverting Input B | High-impedance JFET input node for second amplifier channel; supports rail-to-rail common-mode range |
| 3 | Output B | Class AB output stage capable of ±13.7V swing into 10kΩ with ±15V supplies |
| 4 | V– | Negative supply connection; must be decoupled with ≥0.1µF ceramic capacitor near pin |
| 5 | V+ | Positive supply connection; supports ±5V to ±15V operation; requires local bypassing |
| 6 | Non-inverting Input A | High-impedance JFET input node for first amplifier channel; identical electrical behavior to Pin 2 |
| 7 | Inverting Input A | High-impedance JFET input node for first amplifier channel; matches Pin 1 performance |
| 8 | Output A | Class AB output stage for first amplifier channel; fully independent from Output B |
Key Features
| Feature | Design Value |
|---|---|
| Picoampere input bias current | 2pA max ensures <1µV error when amplifying 100MΩ source impedance at room temperature |
| Rail-to-rail input common-mode range | Includes V+ - eliminates need for level-shifting circuitry in single-supply photodiode transimpedance stages |
| Guaranteed matching specs | Offset voltage match ≤0.5mV (typ) enables high CMRR in instrumentation amplifier configurations |
| Unity-gain stable with 10nF load | Eliminates external compensation components in ADC driver or filter applications |
| Micropower operation | 45µA per amplifier allows integration into ultra-low-power IoT nodes with sub-100µA system sleep current |
Applications
| Photocurrent Amplification | Low-Frequency Active Filtering |
|---|---|
Use Scenario: Amplifying nanoamp-level photocurrent from silicon photodiodes in environmental light meters and spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1GΩ feedback resistor; LT1462ACS8#PBF provides ultra-low input bias current to prevent signal loss and offset drift. Use Value: Enables 10pA resolution with <0.1% linearity error over 4-decade dynamic range at 25°C. | Use Scenario: Implementing 4th-order Chebyshev low-pass filters for anti-aliasing in 1ksps data acquisition systems. IC Role / Device Role / Timing Role: Dual op amp configured as cascaded 2nd-order sections; LT1462ACS8#PBF's low noise and C-load stability ensure predictable phase response. Use Value: Achieves –110dB stopband attenuation above 300Hz while consuming only 90µA total quiescent current. |
| Battery-Powered Sensor Nodes | Low-Droop Track-and-Hold Circuits |
Use Scenario: Signal conditioning front-end for thermistor, RTD, or strain gauge bridges in wireless sensor motes. IC Role / Device Role / Timing Role: Precision differential amplifier and buffer; LT1462ACS8#PBF's matching specs minimize common-mode error in ratiometric measurements. Use Value: Delivers <0.02% gain error and <1µV/°C drift over –40°C to 85°C with no calibration required. | Use Scenario: Sample-and-hold stage preceding SAR ADCs in portable medical devices requiring low power and high accuracy. IC Role / Device Role / Timing Role: Unity-gain buffer with low input bias current; LT1462ACS8#PBF minimizes hold capacitor leakage-induced droop. Use Value: Limits voltage droop to <100µV over 10ms hold time using 10nF capacitor, enabling 16-bit effective resolution. |
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 | 20pA max input bias current (vs. 2pA for LT1462ACS8#PBF); same package, pinout, and supply current | Lower precision in ultra-high-impedance circuits; acceptable for general-purpose micropower buffering | Select LT1462CS8#PBF when 20pA bias current meets system error budget and cost is prioritized |
| OPA2140AIDR | 4pA max input bias current, 1.8MHz GBW, 20V/µs slew rate; SO-8 package but not pin-compatible | Higher speed and wider supply range (±2.25V to ±18V); requires PCB redesign due to different pin assignment | Choose OPA2140AIDR when higher bandwidth and improved PSRR (140dB) justify layout change and cost premium |
Compared with LT1462CS8#PBF, the LT1462ACS8#PBF delivers 10× lower input bias current for critical high-Z sensor interfaces; versus OPA2140AIDR, it offers superior C-load stability (10nF vs. 1nF) and lower quiescent current (45µA vs. 110µA), making it optimal for ultra-low-power, low-frequency precision analog front-ends.
Availability
LT1462ACS8#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, photodiode signal conditioning, and low-frequency active filtering requiring stable component supply and guaranteed picoampere-level input bias performance.
Supply support for LT1462ACS8#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 its legacy precision analog portfolio. Linear Technology was founded in 1981 and specialized in high-performance linear ICs for demanding industrial and instrumentation markets.
The LT1462 series belongs to Linear Technology's micropower precision op amp product line, designed specifically for ultra-low-input-bias-current applications in battery-constrained, high-impedance sensor signal chains.
FAQ
What is the maximum input bias current specification for LT1462ACS8#PBF at 25°C?
The LT1462ACS8#PBF has a maximum input bias current of 2pA at 25°C, as guaranteed in the "LT1462AC" grade specifications. This value is measured under ±5V or ±15V supply conditions with VCM = 0V and represents the upper limit across the production lot, ensuring reliable performance in high-impedance transimpedance amplifier designs where bias current directly impacts DC accuracy.
Does LT1462ACS8#PBF support unity-gain stability with capacitive loads?
Yes, the LT1462ACS8#PBF is unity-gain stable with capacitive loads up to 10nF, as explicitly stated in the datasheet's FEATURES section and verified in TPC13 (Phase Margin vs CLOAD). This capability eliminates the need for external compensation networks when driving ADC input capacitors, long traces, or piezoelectric transducers, distinguishing it from many competing micropower op amps limited to <100pF.
What is the operating temperature range for LT1462ACS8#PBF?
The LT1462ACS8#PBF is specified for operation from –40°C to +85°C, matching the "Specified Temperature Range" in the ABSOLUTE MAXIMUM RATINGS table. While the device is characterized across this range, note that certain parameters (e.g., input bias current, offset voltage drift) are guaranteed only over 0°C to 70°C unless marked with "G" in the Electrical Characteristics tables, which denotes full –40°C to 85°C coverage.
Is LT1462ACS8#PBF pin-compatible with other SO-8 dual op amps?
LT1462ACS8#PBF follows the industry-standard SO-8 dual op amp pinout (Pin 1 = Inverting Input B, Pin 2 = Non-inverting Input B, Pin 3 = Output B, Pin 4 = V–, Pin 5 = V+, Pin 6 = Non-inverting Input A, Pin 7 = Inverting Input A, Pin 8 = Output A), making it compatible with common footprints such as LM358, TL072, and OPA234. However, functional substitution requires verification of input bias current, supply current, and C-load stability requirements.
What supply voltages does LT1462ACS8#PBF support?
The LT1462ACS8#PBF supports dual supply voltages from ±5V to ±15V, with guaranteed performance across this range. The Electrical Characteristics tables explicitly list test conditions for both ±5V and ±15V, and the Absolute Maximum Ratings specify ±20V supply voltage tolerance. Operation at ±5V yields 43µA max supply current per amplifier and ±3.7V output swing into 2kΩ, enabling efficient use in low-voltage portable systems.
LT1462ACS8#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:
- 0.13V/µs
- Gain Bandwidth Product:
- 175 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 28µA (x2 Channels)
- Current - Output / Channel:
- 17 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:
- 8-SO
LT1462ACS8#PBF FAQ
1.How can I place an order for LT1462ACS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1462ACS8#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 LT1462ACS8#PBF reliable?
The price and inventory of LT1462ACS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1462ACS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1462ACS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1462ACS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1462ACS8#PBF?
LT1462ACS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1462ACS8#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 LT1462ACS8#PBF?
For technical support, including LT1462ACS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1462ACS8#PBF requirements.
6.How does Aetrix verify that LT1462ACS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1462ACS8#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 LT1462ACS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1462ACS8#PBF?
All LT1462ACS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1462ACS8#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 LT1462ACS8#PBF part is unused and in its original packaging.
Return procedure for LT1462ACS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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