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Analog Devices Inc. LT1022CN8#PBF
- Part No.:
- LT1022CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1022CN8#PBF.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:139
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Product details
Overview
LT1022CN8#PBF from Analog Devices (formerly Linear Technology) is a high-speed, precision JFET-input operational amplifier in an 8-lead PDIP package, featuring 23 V/µs minimum slew rate, 8.5 MHz gain-bandwidth product, 250 µV maximum input offset voltage at 25°C, 5 µV/°C max drift, and ±13.1 V output swing into 2 kΩ. It serves as a fast D/A output amplifier for 12–14-bit systems requiring low error and rapid settling.
For engineers reviewing the LT1022CN8#PBF datasheet, LT1022CN8#PBF pinout, LT1022CN8#PBF application, or LT1022CN8#PBF equivalent, key selection criteria include guaranteed offset voltage over temperature, bias current stability at 70°C, settling time to 0.05% on 10 V step, thermal drift performance, and compatibility with precision instrumentation and sample-and-hold circuits.
Technical Context
The LT1022CN8#PBF employs a JFET input stage enabling ultra-low input bias current (±50 pA typical at 70°C) and high input resistance (>1012 Ω), critical for high-impedance sensor interfaces and logarithmic amplifiers. Its internal compensation ensures unity-gain stability while delivering 0.9 µs settling to 0.05% on a 10 V step.
Designed for operation from ±15 V supplies, it maintains specified performance across 0°C to 70°C ambient, with guaranteed common-mode rejection (85 dB min) and power supply rejection (86 dB min). The N8 package variant trades extended temperature range for cost-effective through-hole mounting in industrial and test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 23 V/µs min - enables accurate reproduction of fast-rising signals without distortion in DAC output stages. |
| Gain-Bandwidth Product | 8.5 MHz typ - supports stable closed-loop operation up to ~1 MHz at moderate gains for precision signal conditioning. |
| Input Offset Voltage | 250 µV max at 25°C - contributes <0.5 LSB error in a 14-bit, 10 V full-scale system. |
| Offset Voltage Drift | 5 µV/°C max - ensures <1 mV total offset shift over 0°C to 70°C operating range. |
| Input Bias Current | ±50 pA max at 70°C - preserves accuracy in high-Z transducer and photodiode front-ends. |
| Output Voltage Swing | ±13.1 V into 2 kΩ - delivers near-rail performance for ±15 V supplies, minimizing headroom loss. |
| Settling Time | 0.9 µs to 0.05% on 10 V step - meets timing requirements for high-speed data acquisition and waveform generation. |
Pinout & Package
LT1022CN8#PBF is housed in an 8-lead narrow-body PDIP (N8) package with 0.300-inch width, JEDEC MS-001 compliant, rated for 100°C maximum junction temperature and 130°C/W thermal resistance (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | BALANCE | Offset null terminals - connect external 100 kΩ potentiometer wiper to V+ for trimming input offset voltage. |
| 2 | –IN | Inverting input - high-impedance JFET node; sensitive to PCB leakage and guarding requirements. |
| 3 | +IN | Non-inverting input - matched to –IN for optimal CMRR; requires symmetrical layout for best performance. |
| 4 | V– | Negative supply pin - must be decoupled locally with 0.1 µF ceramic capacitor to ground. |
| 5 | N/C | No connection - internally unused; leave unconnected and avoid routing traces nearby. |
| 6 | V+ | Positive supply pin - requires local 0.1 µF ceramic decoupling to minimize supply-induced noise. |
| 7 | OUT | Amplifier output - capable of sourcing/sinking 20 mA; drive capability supports direct loading of DAC reference buffers. |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | Enables ≤50 pA bias current at 70°C, preserving signal integrity in high-impedance sensor and photodiode applications. |
| Guaranteed 0.05% settling in 0.9 µs | Meets timing budgets for 12–14-bit DAC output amplification without post-processing correction. |
| 250 µV max offset voltage (25°C) | Ensures sub-LSB error in 14-bit, 10 V systems - critical for metrology-grade measurement front-ends. |
| Offset null terminals (Pins 1 & 8) | Allows field calibration to reduce system-level offset errors without redesigning feedback networks. |
| Stable at unity gain | Eliminates need for external compensation in most configurations, simplifying layout and reducing BOM count. |
Applications
| Fast D/A Output Amplifier | High-Speed Instrumentation |
|---|---|
|
Use Scenario: Driving voltage output of 12-bit current-output DACs (e.g., AD565, DAC80) with 0–10 V range. IC Role / Device Role / Timing Role: Precision output buffer providing low-offset, fast-settling gain-of-1 amplification after R-2R ladder conversion. Use Value: 0.9 µs settling to 0.05% ensures full-scale transitions meet 1 MSPS update rates without droop or overshoot. |
Use Scenario: Signal conditioning in automated test equipment measuring fast transient waveforms. IC Role / Device Role / Timing Role: High-fidelity gain stage before ADC sampling, maintaining bandwidth and linearity across 100 kHz–1 MHz. Use Value: 8.5 MHz GBW and 23 V/µs slew rate preserve rise time integrity for 100 ns pulses with minimal phase lag. |
| Fast, Precision Sample-and-Hold | Voltage-to-Frequency Conversion |
|
Use Scenario: Hold amplifier in high-resolution data acquisition systems requiring <250 µV hold-step error. IC Role / Device Role / Timing Role: Low-drift, low-noise follower during hold phase; fast acquisition during track mode. Use Value: 5 µV/°C drift and 250 µV offset limit temperature-induced hold errors to <0.25 mV over 50°C ambient swing. |
Use Scenario: Core integrator and comparator driver in wide-dynamic-range VFC circuits (e.g., 20 nW–2 mW optical sensing). IC Role / Device Role / Timing Role: Precision integrator op amp with low input current ensuring linear frequency vs. input voltage transfer. Use Value: ±50 pA bias current minimizes integration error accumulation, enabling 7-decade dynamic range without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211IDR | Lower offset (25 µV max), lower noise (1.1 nV/√Hz), but slower slew rate (2.5 V/µs); SOIC-8 package only. | Better DC precision and noise, unsuitable for >100 kHz settling-critical roles like DAC buffering. | Select OPA211IDR when ultra-low noise and offset dominate; avoid for fast-settling DAC output stages. |
| AD8065ARZ | Faster slew rate (180 V/µs), higher GBW (140 MHz), but bipolar input (2.5 µA bias current) and no offset null pins. | Superior speed for RF/IF gain blocks, but incompatible with high-Z sources or offset-sensitive metrology designs. | Select AD8065ARZ for wideband AC-coupled amplification; avoid where picoampere bias or trimmable offset is required. |
Compared with LT1022CN8#PBF, OPA211IDR offers superior DC accuracy but lacks the speed needed for 12-bit DAC output buffering, while AD8065ARZ delivers extreme bandwidth at the cost of input bias current and offset adjustability - making LT1022CN8#PBF uniquely balanced for precision + speed in industrial control and test instrumentation.
Availability
LT1022CN8#PBF is available at Aetrix Electronics and suitable for fast D/A output amplification, high-speed instrumentation, precision sample-and-hold circuits, voltage-to-frequency conversion, and logarithmic amplification requiring stable component supply across industrial, test & measurement, and aerospace programs.
Supply support for LT1022CN8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT1022 series was developed by Linear Technology specifically for high-speed precision applications demanding simultaneous low offset, low drift, and fast settling - targeting DAC output stages, instrumentation amplifiers, and precision timing circuits.
FAQ
What is the maximum operating temperature for the LT1022CN8#PBF?
The LT1022CN8#PBF is rated for operation from 0°C to 70°C ambient temperature. Its N8 PDIP package has a maximum junction temperature of 100°C and thermal resistance θJA = 130°C/W. Derating is required above 70°C ambient; sustained operation beyond this range may violate specifications and is not guaranteed per the datasheet.
Does the LT1022CN8#PBF support offset voltage trimming?
Yes, the LT1022CN8#PBF provides dedicated balance terminals (Pins 1 and 8) for offset nulling. A 100 kΩ potentiometer is connected between these pins with its wiper tied to V+, allowing adjustment of input offset voltage within ±7 mV range - a key feature for achieving sub-LSB accuracy in precision measurement systems using LT1022CN8#PBF.
Can the LT1022CN8#PBF drive capacitive loads without instability?
The LT1022CN8#PBF is unity-gain stable but exhibits reduced phase margin with increasing capacitive load. For CL > 100 pF, external isolation (e.g., 10–50 Ω series resistor) is recommended at the output. The datasheet confirms stable operation with CF = 15–33 pF in D/A output configurations, but larger loads require careful compensation - always verify stability with actual LT1022CN8#PBF layout and load conditions.
What is the guaranteed input bias current specification for LT1022CN8#PBF at 70°C?
The LT1022CN8#PBF guarantees input bias current of ±250 pA maximum at 70°C ambient temperature, as confirmed in the "ELECTRICAL CHARACTERISTICS" table for the CN8 grade. This ultra-low value - enabled by its JFET input stage - ensures minimal error in high-impedance applications such as photodiode transimpedance amplifiers and precision integrators using LT1022CN8#PBF.
Is the LT1022CN8#PBF pin-compatible with other LT1022 variants like LT1022CH or LT1022AM?
No, the LT1022CN8#PBF is not pin-compatible with LT1022CH (ceramic flatpack) or LT1022AM (metal can H-package), despite identical pin function ordering. The N8 PDIP, CH ceramic, and H metal-can packages have different mechanical footprints, thermal characteristics, and lead forms. While electrical functionality is consistent, PCB layout and thermal design must be tailored to each LT1022CN8#PBF package variant.
LT1022CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 24V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 20 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1022CN8#PBF FAQ
1.How can I place an order for LT1022CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1022CN8#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 LT1022CN8#PBF reliable?
The price and inventory of LT1022CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1022CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1022CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1022CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1022CN8#PBF?
LT1022CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1022CN8#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 LT1022CN8#PBF?
For technical support, including LT1022CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1022CN8#PBF requirements.
6.How does Aetrix verify that LT1022CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1022CN8#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 LT1022CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1022CN8#PBF?
All LT1022CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1022CN8#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 LT1022CN8#PBF part is unused and in its original packaging.
Return procedure for LT1022CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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