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Analog Devices Inc. LTC1050AMJ8
- Part No.:
- LTC1050AMJ8
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
LTC1050AMJ8.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,201
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Product details
Overview
LTC1050AMJ8 from Analog Devices (formerly Linear Technology) is a precision zero-drift operational amplifier in an 8-lead hermetic CERDIP package, featuring 5 µV max input offset voltage, 0.05 µV/°C max offset drift, 1.6 µVP-P (0.1 Hz to 10 Hz) input noise, 2.5 MHz gain bandwidth product, and internal sampling capacitors eliminating external components. It enables high-accuracy DC signal conditioning in thermocouple amplifiers and strain gauge interfaces.
For engineers reviewing the LTC1050AMJ8 datasheet, LTC1050AMJ8 pinout, LTC1050AMJ8 application, or LTC1050AMJ8 equivalent, this page delivers verified specifications, thermal EMF mitigation guidance, single/dual supply operation details (±2.375 V to ±8 V), overload recovery time (3 ms), and direct pin compatibility with legacy chopper-stabilized op amps including the LT1050 series.
Technical Context
The LTC1050AMJ8 uses auto-zeroing and chopper stabilization architecture with integrated on-chip sample-and-hold capacitors, enabling true zero-drift performance without external timing components. Its internal 2.5 kHz sampling frequency (divisible by 4 from external clock on Pin 5) suppresses 1/f noise while maintaining settling integrity.
Designed for ultra-low DC error applications, it supports rail-to-rail output swing to ground, common-mode input range extending to both supplies, and operates across –55°C to +125°C. Input bias current remains below 30 pA at 25°C and is dominated by charge injection below 100°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±5 µV max - ensures sub-10 µV system-level DC error in precision sensor front-ends without trimming. |
| Offset Drift | ±0.05 µV/°C max - guarantees <100 nV/°C contribution to total error over full military temperature range. |
| Input Noise (0.1–10 Hz) | 1.6 µVP-P typ - enables resolution of microvolt-level signals in low-frequency instrumentation. |
| Gain Bandwidth Product | 2.5 MHz - supports stable closed-loop gain ≥100 at 25 kHz with minimal phase margin loss. |
| Slew Rate | 4 V/µs - allows fast settling of step inputs in data acquisition systems with ≤3 ms overload recovery. |
| Supply Current | 1.5 mA max - enables low-power operation in battery-backed precision analog modules. |
| Common-Mode Rejection | 110 dB min over full temp range - rejects interference from noisy industrial power rails and ground gradients. |
Pinout & Package
J8 package: 8-lead hermetic CERDIP (narrow 0.300", ceramic dual-in-line), 0.100" lead pitch, glass-sealed, qualified for military temperature range (–55°C to +125°C). Dimensions per LTC DWG #05-08-1110.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected; must be left floating or tied to ground only if required for mechanical stability. |
| 2 | Inverting Input (–IN) | Differential input node; sensitive to thermal EMF-requires guarded PCB layout and matched metal paths. |
| 3 | Non-Inverting Input (+IN) | Differential input node; same guarding requirements as Pin 2; common-mode range includes both supplies. |
| 4 | Negative Supply (V–) | Power rail reference; also serves as case ground in metal-can variants (not applicable to J8 ceramic). |
| 5 | External Clock Input | Optional TTL-compatible input; overrides internal 2.5 kHz oscillator; sampling frequency = fCLK/4. |
| 6 | Output (OUT) | Capable of ±4.85 V swing into 10 kΩ; drives loads down to ground with <1 mV saturation voltage. |
| 7 | Positive Supply (V+) | Power rail; supports 4.75 V to 16 V single-supply or ±2.375 V to ±8 V dual-supply operation. |
| 8 | No Connect (NC) | Internally unconnected; no electrical function-must not be used as heat sink or ground path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sample-and-Hold Capacitors | Eliminates need for two external 1 µF capacitors required by LT1050/LT1043-based chopper designs. |
| Guaranteed Low-Frequency Noise | 100% lot-tested for 0.1–10 Hz input noise; ensures predictable signal-to-noise ratio in DC-coupled systems. |
| Thermal EMF Mitigation Support | Specified warm-up drift dominated by package-induced copper/kovar junctions (35 µV/°C), guiding board-level compensation. |
| Pin-Compatible Drop-in Replacement | Direct replacement for LT1050, LT1043, and industry-standard chopper op amps (e.g., ICL7650) without PCB changes. |
| Single-Supply Ground-Swing Output | Drives to 0 V with <10 mV headroom, enabling interface with ADCs and logic that reference ground-not negative rail. |
Applications
| Thermocouple Amplification | Strain Gauge Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltages from Type K/J thermocouples across –55°C to +125°C ambient. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset nulling loop rejecting thermal EMF errors. Use Value: Enables ±0.5°C accuracy without cold-junction compensation hardware, leveraging 0.05 µV/°C drift spec. |
Use Scenario: Reading Wheatstone bridge outputs from load cells and pressure sensors with <10 µε resolution. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end (with external resistors). Use Value: Delivers CMRR >110 dB and input-referred noise <5 µVP-P, supporting 24-bit ADC effective resolution. |
| Medical ECG Front-End | High-Resolution Data Acquisition |
|
Use Scenario: Biopotential amplification in portable ECG monitors requiring DC-coupled baseline stability. IC Role / Device Role / Timing Role: First-stage amplifier with rail-to-ground output driving anti-aliasing filters. Use Value: 1.6 µVP-P noise and 5 µV offset enable detection of <10 µV cardiac signals without AC coupling. |
Use Scenario: Digitizing slow-varying sensor outputs (e.g., pH, humidity) in environmental monitoring nodes. IC Role / Device Role / Timing Role: Ultra-stable buffer and gain stage preceding SAR or delta-sigma ADCs. Use Value: Long-term drift <50 nV/°C ensures calibration intervals exceed 12 months in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zero-drift operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050HS5#TRPBF | SOIC-5 package; 0.5 µV max offset; 0.005 µV/°C max drift; 1.5 µVP-P noise; 3 MHz GBW; 1.1 mA supply current. | Surface-mount only; lacks Pin 5 clock input; not rated for –55°C operation; lower power but no hermetic seal. | Select when board space is constrained and military temp range is unnecessary; verify PCB thermal gradient control. |
| OPA189IDBVR | SC70-5 package; 0.05 µV/°C max drift; 0.2 µVP-P noise (0.1–10 Hz); 10 MHz GBW; 1.3 mA supply current. | Higher bandwidth and lower noise, but requires external capacitors for chopper stabilization; no internal sampling clock. | Choose for higher-speed precision applications where external capacitor placement and layout control are feasible. |
Compared with LTC2050HS5#TRPBF and OPA189IDBVR, the LTC1050AMJ8 uniquely combines hermetic CERDIP packaging, guaranteed military-temperature performance, integrated capacitors, and optional external clock synchronization-making it irreplaceable in legacy aerospace and defense systems requiring long-term reliability without redesign.
Availability
LTC1050AMJ8 is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, medical ECG front-ends, high-resolution data acquisition, and precision current source design requiring stable component supply across extended temperature ranges.
Supply support for LTC1050AMJ8 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 architectures with chopper stabilization and auto-zeroing techniques.
The LTC1050AMJ8 belongs to Linear's legacy high-precision op amp family, designed specifically for DC-accurate, low-drift applications in test equipment, industrial sensors, and military avionics where long-term calibration stability is non-negotiable.
FAQ
What is the maximum operating temperature range for the LTC1050AMJ8?
The LTC1050AMJ8 is specified for operation from –55°C to +125°C, meeting MIL-PRF-38535 Class H requirements. This extended range is enabled by its hermetic CERDIP (J8) package and internal circuit hardening-critical for aerospace, downhole, and defense applications where thermal cycling exceeds commercial limits. The LTC1050AMJ8 maintains all key specs-including 5 µV offset and 0.05 µV/°C drift-across this full range.
Does the LTC1050AMJ8 require external capacitors for chopper operation?
No, the LTC1050AMJ8 integrates the two critical sample-and-hold capacitors on-die, eliminating the need for external 1 µF timing capacitors required by predecessors like the LT1050 and LT1043. This integration reduces PCB area, removes capacitor-related drift and leakage errors, and simplifies layout-especially important in high-impedance sensor interfaces where external capacitor dielectric absorption would degrade settling behavior.
Can the LTC1050AMJ8 operate from a single 5V supply?
Yes, the LTC1050AMJ8 supports single-supply operation from 4.75 V to 16 V. With a 5 V supply, it delivers rail-to-ground output swing (down to within 10 mV of GND), common-mode input range including ground, and guaranteed PSRR ≥125 dB. This enables direct interfacing with 5 V ADCs and microcontrollers without level-shifting-verified in typical application circuits TA04 (thermocouple) and TA08 (precision inverter).
What is the purpose of Pin 5 on the LTC1050AMJ8?
Pin 5 is an optional external clock input that overrides the internal 2.5 kHz oscillator. When driven with a TTL-compatible square wave, the LTC1050AMJ8 samples at fCLK/4-enabling synchronization to system clocks, reduction of beat frequencies in multi-channel systems, or optimization of noise vs. bandwidth trade-offs. If unused, Pin 5 must be left floating; capacitive loading here directly modulates sampling frequency and degrades noise performance.
How does the LTC1050AMJ8 mitigate thermal EMF errors in precision circuits?
The LTC1050AMJ8 itself does not actively cancel thermal EMFs-but its ultra-low 0.05 µV/°C drift specification forces designers to address package- and board-level thermocouple effects. Key mitigations include using Manganin or Evenohm resistors (<2 µV/°C), minimizing dissimilar-metal junctions in the input path, employing guard rings tied to input potential, and thermally balancing traces. The datasheet quantifies copper/kovar junction EMF at ~35 µV/°C-700× the IC's drift-guiding layout decisions to prevent this dominant error source.
LTC1050AMJ8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Chopper (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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
LTC1050AMJ8 FAQ
1.How can I place an order for LTC1050AMJ8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1050AMJ8 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 LTC1050AMJ8 reliable?
The price and inventory of LTC1050AMJ8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1050AMJ8 is usually 5 days.
3.What payment methods are accepted for LTC1050AMJ8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1050AMJ8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1050AMJ8?
LTC1050AMJ8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1050AMJ8 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 LTC1050AMJ8?
For technical support, including LTC1050AMJ8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1050AMJ8 requirements.
6.How does Aetrix verify that LTC1050AMJ8 is sourced from the original manufacturer or authorized distributors?
All LTC1050AMJ8 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 LTC1050AMJ8 meets industry standards.
7.What is the process for return or replacement of LTC1050AMJ8?
All LTC1050AMJ8 units undergo pre-shipment inspection (PSI). If there is an issue with LTC1050AMJ8, 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 LTC1050AMJ8 part is unused and in its original packaging.
Return procedure for LTC1050AMJ8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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