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Analog Devices Inc. LTC1050CN8#PBF
- Part No.:
- LTC1050CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1050CN8#PBF.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:888
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Product details
Overview
LTC1050CN8#PBF from Analog Devices (acquired Linear Technology) is a precision zero-drift operational amplifier with integrated sample-and-hold capacitors, enabling offset voltage ≤±5 µV, drift ≤±0.05 µV/°C, and 1.6 µVP-P (0.1–10 Hz) input noise. It operates from ±2.375 V to ±8 V dual supplies or 4.75–16 V single supply and delivers 4 V/µs slew rate and 2.5 MHz gain bandwidth at 1 mA supply current - ideal for thermocouple amplification and high-resolution DC-coupled data acquisition.
For engineers reviewing the LTC1050CN8#PBF datasheet, LTC1050CN8#PBF pinout, LTC1050CN8#PBF application, or LTC1050CN8#PBF equivalent, key selection criteria include guaranteed DC accuracy (CMRR >120 dB at DC/60 Hz), internal capacitor integration eliminating external components, optional external clock synchronization on Pin 5, and compatibility with legacy chopper-stabilized op-amps like LT1050 and ICL7650 in 8-pin DIP layouts.
Technical Context
The LTC1050CN8#PBF employs auto-zeroing architecture with internal 2.5 kHz sampling frequency, achieving ultralow drift by periodically nulling input offset without requiring external timing components. Its input stage includes guarded differential inputs with common-mode range extending to both supply rails, and output swings to ground under single-supply operation.
Pin 5 supports optional TTL-compatible external clock input (divided-by-4 internally), enabling synchronization across multiple amplifiers to suppress beat frequencies. Pins 1 and 8 are unconnected (NC), distinguishing it from chopper amplifiers requiring external capacitors - a design simplification confirmed for the N8 package variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±5 µV max - enables sub-10 µV system-level DC error in precision sensor front-ends without trimming. |
| Offset Drift | ±0.05 µV/°C max - ensures <1 µV total drift over 0–70°C industrial temperature range. |
| Input Noise (0.1–10 Hz) | 1.6 µVP-P typ - supports 16+ bit resolution in low-frequency measurement systems. |
| CMRR | 120 dB min at DC and 60 Hz - rejects power-line interference in bridge sensor applications. |
| Slew Rate | 4 V/µs - sustains accurate step response for 10 Hz–20 kHz signals in active filter designs. |
| Supply Current | 1 mA typ - allows battery-powered portable instrumentation with multi-hour runtime. |
| Gain Bandwidth Product | 2.5 MHz - supports stable closed-loop gain ≥100 up to 25 kHz with phase margin >60°. |
Pinout & Package
Package: 8-lead PDIP (N8), 0.300-inch width, through-hole mounting. RoHS-compliant lead finish (Pb-free with NiPdAu plating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected; must remain floating - no external capacitor required unlike LT1050/ICL7650. |
| 2 | Inverting Input (–IN) | Differential input node; guarded layout recommended to minimize leakage-induced offset errors. |
| 3 | Non-Inverting Input (+IN) | Differential input node; common-mode voltage range extends to V– and V+ rails. |
| 4 | V– (Negative Supply) | Ground reference in single-supply mode; connects to –5 V in dual-supply configurations. |
| 5 | External Clock Input | Optional TTL-level input; internal oscillator disabled when driven - enables multi-amp synchronization. |
| 6 | Output (OUT) | Rail-to-rail capable output swing; drives 10 kΩ load to ±4.85 V with ±5 V supplies. |
| 7 | V+ (Positive Supply) | Connects to +5 V (single) or +5 V (dual); PSRR ≥125 dB ensures immunity to supply ripple. |
| 8 | No Connect (NC) | Internally unconnected; must remain floating - eliminates need for external hold capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sample-and-Hold Capacitors | Eliminates two external 1 µF capacitors required by ICL7650/LT1050 - reduces BOM count and board area by >25 mm². |
| Guaranteed Low-Frequency Noise | 100% lot-tested 0.1–10 Hz input noise (1.6 µVP-P) - ensures predictable resolution in weigh-scale and medical ECG front-ends. |
| Input Common-Mode Range Includes Supplies | Accepts signals from V– to V+ - enables direct interfacing with grounded sensors and rail-referenced bridges without level-shifting. |
| Overload Recovery Time | 3 ms typical from negative saturation - 100× faster than chopper amps using external capacitors, critical for fast-settling data acquisition. |
| Single-Supply Operation | Functional from 4.75 V to 16 V - supports direct connection to 5 V logic rails and battery-powered portable instruments. |
Applications
| Thermocouple Amplification | Strain Gauge Signal Conditioning |
|---|---|
Use Scenario: Amplifying µV-level K-type thermocouple outputs (≈41 µV/°C) across 0–100°C range with cold-junction compensation. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with ultra-low drift and CMRR >120 dB to reject ambient thermal gradients and 60 Hz noise. Use Value: Enables ±0.25°C measurement accuracy without manual offset calibration or thermistor-based compensation circuitry. |
Use Scenario: Reading mV-level outputs from full-bridge strain gauges in load cells and pressure transducers. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end (with external resistors) providing gain = 100, input bias <30 pA, and CMRR >100 dB. Use Value: Achieves <0.01% linearity error over temperature due to <5 µV offset and <0.05 µV/°C drift - eliminates factory trim requirements. |
| High-Resolution Data Acquisition | DC-Accurate Active Filters |
Use Scenario: Front-end conditioning for 16-bit SAR ADCs in portable multimeters and environmental monitors. IC Role / Device Role / Timing Role: Anti-aliasing filter driver and sensor signal amplifier with 1.6 µVP-P noise and 2.5 MHz GBW. Use Value: Preserves ENOB >15.2 bits at 10 Hz input frequency - meets metrology-grade accuracy per IEEE 1057. |
Use Scenario: Implementing 7th-order Bessel lowpass filters with linear phase and <0.1 dB passband ripple. IC Role / Device Role / Timing Role: Active integrator core in switched-capacitor filter topologies (e.g., LTC1062-based designs). Use Value: Maintains group delay flatness <±0.5 µs across 0–100 Hz - essential for pulse shape fidelity in biomedical signal processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050CS6#PBF | Same zero-drift architecture but in SOT-23-6; higher input bias (±25 pA vs ±10 pA), lower CMRR (110 dB), and no external clock pin. | Targeted at space-constrained PCBs where board area is prioritized over multi-amp synchronization capability. | Select when footprint reduction outweighs need for Pin 5 clock sync and maximum CMRR. |
| OPA189IDBVR | Zero-drift op amp with 0.005 µV/°C drift (lower), but requires external capacitors; no integrated clock option; higher supply current (1.3 mA). | Preferred for ultra-low-drift lab equipment where long-term stability dominates over component count. | Choose only if drift specification <0.01 µV/°C is mandatory and external capacitor placement is acceptable. |
Compared with LTC2050CS6#PBF and OPA189IDBVR, the LTC1050CN8#PBF uniquely combines integrated capacitors, Pin 5 clock synchronization, and 120 dB CMRR in an industry-standard 8-pin DIP - making it optimal for legacy-compatible, noise-sensitive, multi-channel precision analog systems.
Availability
LTC1050CN8#PBF is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, and high-resolution data acquisition requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for LTC1050CN8#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, inheriting its precision analog portfolio. Linear pioneered zero-drift op amp technology, emphasizing metrology-grade DC performance and robustness in harsh environments.
The LTC1050CN8#PBF belongs to Linear's LTC1050 family of auto-zeroing amplifiers, designed specifically for applications demanding microvolt-level DC accuracy, such as electronic scales, medical instrumentation, and precision sensor interfaces - without external passive trimming components.
FAQ
What is the maximum operating temperature range for the LTC1050CN8#PBF?
The LTC1050CN8#PBF is rated for operation from –40°C to +85°C (Commercial grade). This is explicitly defined in the Absolute Maximum Ratings table and confirmed across all electrical characteristics test conditions. The 'C' suffix in the part number denotes this temperature range, distinct from the 'H' (–40°C to +125°C) and 'M' (–55°C to +125°C) variants. Derating guidelines apply above 70°C ambient per the thermal resistance (θJA = 100°C/W) specified for the N8 package.
Does the LTC1050CN8#PBF require external capacitors for operation?
No, the LTC1050CN8#PBF does not require external capacitors. Its defining feature is the integration of on-chip sample-and-hold capacitors - eliminating the two 1 µF external capacitors mandated by predecessors like the ICL7650 and LT1050. Pins 1 and 8 are No Connect (NC) terminals, and the internal 2.5 kHz sampling oscillator operates autonomously. External capacitors are only needed if using Pin 5 for clock synchronization and driving high capacitive loads (>10 pF), per Figure 3 in the datasheet.
Can the LTC1050CN8#PBF be used with a single 5V supply?
Yes, the LTC1050CN8#PBF supports true single-supply operation from 4.75 V to 16 V. Its input common-mode range extends to the negative rail (V–), and the output swings to within 150 mV of ground with a 10 kΩ load. When powered from +5 V and GND, V– = GND, enabling direct interfacing with grounded sensors. PSRR is guaranteed down to 4.75 V, ensuring stable performance even at minimum logic rail voltage.
What is the function of Pin 5 on the LTC1050CN8#PBF?
Pin 5 is the optional External Clock Input. When left unconnected, the LTC1050CN8#PBF uses its internal 2.5 kHz oscillator. Applying a TTL-compatible square wave to Pin 5 overrides the internal oscillator; the sampling frequency becomes the external clock frequency divided by 4. This enables precise synchronization of multiple LTC1050CN8#PBF devices to eliminate inter-channel beat frequencies in multi-channel data acquisition systems.
Is the LTC1050CN8#PBF pin-compatible with the ICL7650?
Yes, the LTC1050CN8#PBF is pin-compatible with the 8-pin versions of the ICL7650 and LT1050. Pin assignments for V+, V–, +IN, –IN, OUT, and NC positions match exactly. However, Pins 1 and 8 are unconnected in the LTC1050CN8#PBF (vs. capacitor connections in the ICL7650), and Pin 5 serves as an optional clock input (vs. NC in the ICL7650). The LTC1050CN8#PBF can be a direct plug-in replacement, even with existing ICL7650 capacitor footprints - the capacitors may remain unpopulated or removed.
LTC1050CN8#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:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 0.5 µV
- Current - Supply:
- 1mA
- 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
LTC1050CN8#PBF FAQ
1.How can I place an order for LTC1050CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1050CN8#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 LTC1050CN8#PBF reliable?
The price and inventory of LTC1050CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1050CN8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1050CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1050CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1050CN8#PBF?
LTC1050CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1050CN8#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 LTC1050CN8#PBF?
For technical support, including LTC1050CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1050CN8#PBF requirements.
6.How does Aetrix verify that LTC1050CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1050CN8#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 LTC1050CN8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1050CN8#PBF?
All LTC1050CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1050CN8#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 LTC1050CN8#PBF part is unused and in its original packaging.
Return procedure for LTC1050CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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