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Analog Devices Inc. LTC1051CN8#PBF
- Part No.:
- LTC1051CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1051CN8#PBF.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,375
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Product details
Overview
LTC1051CN8#PBF from Analog Devices (formerly Linear Technology) is a dual zero-drift operational amplifier in an 8-lead PDIP package, delivering 0.5µV max offset voltage, 0.05µV/°C max drift, 1.5µVP-P (DC–10Hz) input noise, 140dB typical voltage gain, and 2.5MHz gain bandwidth - enabling high-precision DC-coupled signal conditioning in thermocouple amplifiers and strain gauge interfaces.
For engineers reviewing the LTC1051CN8#PBF datasheet, LTC1051CN8#PBF pinout, LTC1051CN8#PBF application, or LTC1051CN8#PBF equivalent, this page provides verified pin mapping, real-world overload recovery behavior (1.5ms positive / 3ms negative saturation recovery), confirmed internal sampling frequency (3.3kHz), and two validated alternative op amps with documented performance trade-offs for low-drift instrumentation designs.
Technical Context
The LTC1051CN8#PBF implements chopper-stabilized architecture with integrated on-chip sample-and-hold capacitors - eliminating external capacitor requirements common to competing zero-drift amplifiers. Its internal 3.3kHz sampling clock enables automatic offset correction while maintaining DC accuracy and low 1/f noise.
It operates from ±2.375V to ±8V supplies (±5V typical), supports rail-to-rail output swing down to ground, accepts input common-mode voltage including ground, and achieves 114dB minimum CMRR and 120dB minimum PSRR - all at 1mA per amplifier supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±0.5µV typical / ±5µV max - enables sub-10µV system-level DC error in precision sensor front ends without trimming. |
| Offset Drift | ±0.01µV/°C typical / ±0.05µV/°C max - ensures stable calibration over industrial temperature range (–40°C to +85°C). |
| Input Noise | 1.5µVP-P (DC–10Hz) - supports high-resolution data acquisition with <1µV RMS noise floor in slow-sampling systems. |
| Gain Bandwidth | 2.5MHz - allows closed-loop gains up to ~250 at 10kHz while retaining phase margin for stable active filtering. |
| Slew Rate | 4V/µs - supports fast settling of step inputs in precision control loops without slew-induced distortion. |
| Supply Current | 1mA per op amp - enables dual-channel precision amplification within 2mA total budget for battery-powered instrumentation. |
| CMRR | 114dB min - rejects common-mode interference from noisy power rails or shared sensor grounds in multi-channel systems. |
Pinout & Package
Package: 8-lead plastic dual-in-line (PDIP), N8 designation, 0.300" wide body, through-hole mounting. RoHS-compliant lead finish (Pb-free with NiPdAu plating).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads ≥10kΩ to ±4.85V swing with ±5V supplies; short-circuit protected. |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (±15pA bias); sensitive to thermal EMF and board leakage. |
| 3 | +IN A | Non-inverting input of Amp A - same impedance and layout sensitivity as Pin 2; requires guard ring for picoampere accuracy. |
| 4 | V– | Negative supply rail - must be decoupled with 0.1µF ceramic near pin; supports operation down to –8V. |
| 5 | V+ | Positive supply rail - accepts +4.75V to +16V single-supply or ±2.375V to ±8V dual-supply operation. |
| 6 | OUT B | Amplifier B output - electrically identical to Pin 1; independent channel enables dual-sensor or differential pair use. |
| 7 | –IN B | Inverting input of Amp B - isolated from Amp A inputs; shares V+ and V– rails only. |
| 8 | +IN B | Non-inverting input of Amp B - fully independent; supports separate gain-setting networks per channel. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitors required | On-chip sample-and-hold capacitors eliminate external components, reducing PCB area and assembly cost vs. legacy chopper amps. |
| Input common-mode range includes ground | Enables direct interfacing with grounded sensors (e.g., thermocouples, RTDs) without level-shifting circuitry. |
| Output swings to ground | Supports single-supply operation down to 0V output - critical for driving ADCs with 0V reference inputs. |
| 100× faster overload recovery | 1.5ms/3ms recovery from positive/negative saturation vs. >100ms for chopper amps using external capacitors. |
| Pin-compatible with industry-standard dual op amps | Direct drop-in replacement for LM358, OP27, and similar 8-pin DIP dual op amps - no PCB redesign needed. |
Applications
| Thermocouple Amplifiers | Electronic Scales |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltages from Type K/J thermocouples across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with ultra-low drift to preserve absolute temperature accuracy. Use Value: 0.05µV/°C max drift limits temperature error to <0.1°C over full range - meeting Class I industrial thermometer specs. |
Use Scenario: Conditioning mV outputs from 350Ω strain gauge bridges in load cells and platform scales. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation front end with rail-to-rail output for 24-bit sigma-delta ADCs. Use Value: 1.5µVP-P (DC–10Hz) noise ensures <10ppm resolution in 100kg full-scale weighing systems. |
| Medical Instrumentation | High Resolution Data Acquisition |
|
Use Scenario: Biopotential signal conditioning (ECG, EEG) requiring DC stability and minimal electrode offset drift. IC Role / Device Role / Timing Role: First-stage amplifier rejecting motion artifacts and skin potential drift over minutes-long recordings. Use Value: Sub-µV offset and 0.01µV/°C drift prevent baseline wander during long-duration patient monitoring. |
Use Scenario: Front-end amplification for 24-bit SAR or sigma-delta ADCs in automated test equipment. IC Role / Device Role / Timing Role: Programmable-gain amplifier (PGA) core with guaranteed 120dB min CMRR and PSRR. Use Value: 114dB CMRR suppresses 60Hz mains coupling in multi-channel simultaneous sampling systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Single-channel, 1µV max offset, 0.002µV/°C drift, 0.5µVP-P noise (0.1–10Hz), SOIC-8 package. | Lower drift and noise but single-channel only; requires two devices for dual functionality. | Select when ultimate DC stability is prioritized over channel count and cost-per-channel. |
| OPA2189IDR | Dual-channel, 0.005µV/°C max drift, 5.2nV/√Hz wideband noise, 12MHz GBW, SOIC-8 package. | Higher bandwidth and lower wideband noise, but 4µV max offset and no integrated chopper capacitors. | Select for AC-coupled or higher-frequency (>10kHz) precision applications where chopper ripple is unacceptable. |
Compared with AD8628ARZ and OPA2189IDR, the LTC1051CN8#PBF uniquely delivers dual-channel zero-drift performance with on-chip capacitors in PDIP packaging - making it optimal for legacy-replacement, low-frequency (<1kHz), space-constrained industrial sensor nodes where board real estate and rework avoidance are critical.
Availability
LTC1051CN8#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, electronic scales, and medical instrumentation requiring stable component supply across extended product lifecycles and industrial temperature ranges.
Supply support for LTC1051CN8#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 precision analog portfolio, emphasizing high-performance signal conditioning ICs for industrial, medical, and aerospace applications.
The LTC1051 series was designed specifically for ultra-low-drift, low-noise DC amplification in sensor interface circuits - targeting applications where traditional op amps fail due to thermal drift or 1/f noise limitations.
FAQ
What is the maximum operating temperature range for the LTC1051CN8#PBF?
The LTC1051CN8#PBF is rated for operation from –40°C to +85°C (Commercial grade). This range is explicitly defined in the Absolute Maximum Ratings table and confirmed across all electrical characteristics with the "●" symbol denoting full-range specification compliance. It is not rated for military or extended industrial temperature grades.
Does the LTC1051CN8#PBF require external capacitors for chopper stabilization?
No, the LTC1051CN8#PBF integrates on-chip sample-and-hold capacitors - a key differentiator from earlier chopper amplifiers. This eliminates the need for external capacitors typically required for offset nulling, reducing bill-of-materials count, PCB area, and layout sensitivity to parasitic leakage paths.
What is the internal sampling frequency of the LTC1051CN8#PBF, and how does it affect AC performance?
The LTC1051CN8#PBF operates with a fixed internal sampling frequency of 3.3kHz. This clock enables automatic offset correction but introduces aliasing risks for input signals above ~750Hz in high-gain configurations. Designers must band-limit input signals or add feedback capacitors to suppress alias products per Figure 9 in the datasheet.
Can the LTC1051CN8#PBF operate from a single 5V supply?
Yes, the LTC1051CN8#PBF supports single-supply operation from 4.75V to 16V. With a 5V supply (GND = V–, 5V = V+), it delivers rail-to-rail output swing down to GND and accepts input common-mode voltage down to GND - enabling direct interfacing with grounded sensors and unipolar ADCs.
How does the overload recovery time of the LTC1051CN8#PBF compare to standard chopper amplifiers?
The LTC1051CN8#PBF recovers from positive saturation in 1.5ms and negative saturation in 3ms - approximately 100× faster than chopper amplifiers requiring external capacitors. This rapid recovery prevents sustained output errors during transient overloads in closed-loop control or sensor fault conditions.
LTC1051CN8#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:
- Chopper (Zero-Drift)
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 pA
- Voltage - Input Offset:
- 0.5 µV
- Current - Supply:
- 1mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LTC1051CN8#PBF FAQ
1.How can I place an order for LTC1051CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1051CN8#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 LTC1051CN8#PBF reliable?
The price and inventory of LTC1051CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1051CN8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1051CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1051CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1051CN8#PBF?
LTC1051CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1051CN8#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 LTC1051CN8#PBF?
For technical support, including LTC1051CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1051CN8#PBF requirements.
6.How does Aetrix verify that LTC1051CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1051CN8#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 LTC1051CN8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1051CN8#PBF?
All LTC1051CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1051CN8#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 LTC1051CN8#PBF part is unused and in its original packaging.
Return procedure for LTC1051CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1051CN8#PBF Tags
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