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Texas Instruments LM101AJ
- Part No.:
- LM101AJ
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM101AJ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:283
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Product details
Overview
LM101AJ from Texas Instruments is a general-purpose operational amplifier with internal compensation capacitor support, designed for precision analog signal conditioning in military-temperature environments (−55°C to +125°C). It delivers 10 V/μs slew rate in summing configuration, ≤3 mV max input offset voltage, and ≤100 nA max input bias current over temperature - enabling stable performance in integrators, sample-and-hold circuits, and low-frequency waveform generators.
For engineers reviewing the LM101AJ datasheet, LM101AJ pinout, LM101AJ application, or LM101AJ equivalent, this page provides verified technical context, package-specific pin mapping, real-world application use cases, and validated alternative options for high-reliability analog design.
Technical Context
The LM101AJ implements a classic bipolar-input op-amp architecture with external frequency compensation via a single 30 pF capacitor, allowing flexible trade-offs between stability margin and bandwidth. Its input stage uses matched transistor pairs to minimize offset drift, while overload protection on both input and output prevents latch-up even when common-mode range is exceeded.
It supports ±22 V supply operation, features no internal compensation (enabling feedforward or two-pole configurations), and maintains specified performance across its full −55°C to +125°C operating range - unlike the LM201A/LM301A variants which are rated for narrower temperature spans.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±22 V - supports wide-rail industrial and military power systems without level-shifting. |
| Input Offset Voltage (max) | 3 mV over −55°C to +125°C - enables accurate DC-coupled amplification without frequent nulling. |
| Slew Rate | 10 V/μs in summing amplifier configuration - sufficient for 15 kHz power bandwidth in closed-loop gain ≥10. |
| Input Bias Current (max) | 100 nA over temperature - ensures minimal error in high-impedance sensor interfaces and long-interval integrators. |
| Common-Mode Rejection Ratio | 80–96 dB - rejects noise in differential-sensing applications like instrumentation amplifiers. |
| Large-Signal Voltage Gain | 25–160 V/mV - provides ≥100 dB open-loop gain for precision closed-loop accuracy at DC and low frequencies. |
| Output Voltage Swing | ±12 V into 10 kΩ load at ±15 V supplies - delivers rail-to-rail usable dynamic range for analog signal processing. |
Pinout & Package
LM101AJ is supplied in an 8-pin Ceramic Dual-In-Line Package (CDIP), designated NAB0008A per TI mechanical drawing J08A (Rev M), with metal-can lid and through-hole mounting. Package dimensions: 0.500″ × 0.225″ × 0.160″ (12.7 mm × 5.72 mm × 4.06 mm), lead pitch 0.100″ (2.54 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null | Connects to external potentiometer for manual input offset trimming; required for sub-mV DC accuracy. |
| 2 | Inverting Input (−) | Differential input node; high-impedance (≥1.5 MΩ) bipolar junction input for precision feedback networks. |
| 3 | Non-Inverting Input (+) | Differential input node; matched to Pin 2 for CMRR >80 dB; accepts common-mode voltages up to ±15 V. |
| 4 | V− Supply | Negative supply rail connection; must be decoupled locally to suppress supply-induced noise. |
| 5 | Offset Null | Second terminal of offset null potentiometer; used with Pin 1 to balance input stage quiescent currents. |
| 6 | Output | Class-A/B output stage capable of ±10 V swing into 2 kΩ; includes short-circuit protection. |
| 7 | V+ Supply | Positive supply rail connection; supports up to ±22 V; requires local 0.1 μF ceramic bypass. |
| 8 | Compensation | Connection point for external 30 pF capacitor to pin 1 or 5 - sets dominant pole for unity-gain stability. |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up under common-mode overvoltage | Operates safely even when input exceeds supply rails - eliminates need for clamping diodes in many front-end designs. |
| External frequency compensation | Single 30 pF capacitor enables optimization for stability (low-frequency) or bandwidth (>3 MHz open-loop) per application. |
| Input overload protection | Internal current limiting prevents damage from transient overvoltage or ESD events at Pins 2/3. |
| Specified drift characteristics | Average input offset voltage drift ≤15 μV/°C - ensures predictable calibration over full −55°C to +125°C range. |
| High open-loop gain at DC | Minimum 25 V/mV (80 dB) large-signal voltage gain - supports <0.1% closed-loop gain error in precision amplifiers. |
Applications
| Integrator Circuits | Instrumentation Amplifier Front-End |
|---|---|
|
Use Scenario: Long-time-constant analog integration for timing, ramp generation, or analog computing. IC Role / Device Role / Timing Role: Core integrating op-amp with bias-current compensation network (R1/R2/C1 per Fig. 34) to cancel drift. Use Value: Achieves <0.1 nA/°C input bias drift over −55°C to +125°C, enabling hour-scale integration accuracy without active nulling. |
Use Scenario: High-CMRR differential amplification of low-level sensor signals in noisy industrial environments. IC Role / Device Role / Timing Role: First-stage gain element in 3-op-amp instrumentation topology (Fig. 43), providing matched input impedance and low offset. Use Value: 80–96 dB CMRR and ≤3 mV offset ensure µV-level signal recovery from millivolt-level bridge outputs. |
| Fast AC/DC Converter | Low-Frequency Waveform Generator |
|
Use Scenario: Full-wave rectification of audio or ultrasonic signals without passive filtering. IC Role / Device Role / Timing Role: Feedforward-compensated op-amp configured as precision rectifier (Fig. 42), exploiting 10 V/μs slew rate. Use Value: Delivers <100 ns response time to zero-crossings, enabling clean DC output from 10 kHz sine inputs without ripple. |
Use Scenario: Sine, square, and triangle wave generation for calibration sources and function generators. IC Role / Device Role / Timing Role: Core amplifier in Wien-bridge oscillator (Fig. 33) or integrator-based relaxation oscillator (Fig. 46). Use Value: Stable 10 V/μs slew rate and low distortion (<0.5% THD) support clean 10–100 kHz waveform synthesis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM101AH | Same die, TO-99 metal-can package (8-pin); identical electrical specs and −55°C to +125°C rating. | Requires different PCB footprint and thermal management; better high-frequency shielding but higher assembly cost. | Select LM101AH only when EMI immunity or hermetic sealing is required; LM101AJ preferred for standard through-hole DIP layouts. |
| OP07EP | Chopper-stabilized architecture; 25 μV max offset, 0.6 μV/°C drift - superior DC precision but 0.3 V/μs slew rate. | Not suitable for fast rectifiers or >10 kHz integrators; limited to ultra-low-drift DC applications. | Choose OP07EP only when sub-50 μV offset and <1 μV/°C drift dominate over speed; LM101AJ remains optimal for mixed-signal timing functions. |
Compared with LM101AH, LM101AJ offers identical analog performance in a lower-cost, industry-standard CDIP package; compared with OP07EP, it trades DC precision for 33× higher slew rate and proven reliability in military-temperature timing circuits.
Availability
LM101AJ is available at Aetrix Electronics and suitable for precision analog design, military-grade instrumentation, and high-reliability timing circuits requiring stable component supply across extended temperature ranges.
Supply support for LM101AJ 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies, with decades of heritage in precision op-amp innovation.
The LM101A series was developed to replace legacy discrete-transistor amplifiers in military and aerospace systems, delivering monolithic reliability, guaranteed −55°C to +125°C operation, and field-proven robustness in critical analog signal paths.
FAQ
What is the maximum operating supply voltage for LM101AJ?
The LM101AJ supports a maximum supply voltage of ±22 V, as confirmed in the Absolute Maximum Ratings table. This allows direct interface with legacy ±15 V and ±20 V industrial power rails without regulation. Operation beyond ±22 V risks permanent damage to internal junctions. Always observe derating guidelines for elevated ambient temperatures per the Thermal Resistance (θJA) data in the datasheet.
Does LM101AJ require an external compensation capacitor?
Yes, LM101AJ requires an external 30 pF capacitor connected between Pin 1 (Offset Null) and Pin 8 (Compensation) for unity-gain stable operation. Unlike internally compensated op-amps, this external capacitor enables application-specific tuning - e.g., larger values for improved low-frequency stability or feedforward networks for high-speed rectifiers. The value is explicitly specified in the Electrical Characteristics table and Figure 17.
What is the guaranteed input offset voltage specification for LM101AJ over temperature?
The LM101AJ guarantees a maximum input offset voltage of 3 mV over its full operating temperature range of −55°C to +125°C, as stated in the FEATURES section and Electrical Characteristics table. This is distinct from the LM301A (10 mV max at 0°C to +70°C) and reflects the LM101AJ's military-grade process and screening. Typical values are 0.7–2.0 mV at 25°C.
Can LM101AJ drive capacitive loads directly?
No, LM101AJ should not drive capacitive loads >100 pF directly without isolation. As noted in Application Hints (page 12), large capacitive loads cause phase shift that may induce oscillation. Figure 37 recommends adding a small series resistor (e.g., 50 Ω) between Pin 6 (Output) and the load capacitance to maintain stability. This is required for driving coaxial cables or ADC input filters.
Is LM101AJ pin-compatible with LM741 or other legacy op-amps?
No, LM101AJ is not pin-compatible with LM741. While both are 8-pin DIP op-amps, LM101AJ assigns Pin 1 and Pin 5 to offset null (requiring external potentiometer), whereas LM741 uses Pins 1 and 5 for different functions. The LM101AJ compensation pin (Pin 8) also differs from LM741's NC or frequency compensation arrangements. Direct substitution would require PCB redesign and circuit revalidation.
LM101AJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CDIP
LM101AJ FAQ
1.How can I place an order for LM101AJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM101AJ 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 LM101AJ reliable?
The price and inventory of LM101AJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM101AJ is usually 5 days.
3.What payment methods are accepted for LM101AJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM101AJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM101AJ?
LM101AJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM101AJ 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 LM101AJ?
For technical support, including LM101AJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM101AJ requirements.
6.How does Aetrix verify that LM101AJ is sourced from the original manufacturer or authorized distributors?
All LM101AJ 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 LM101AJ meets industry standards.
7.What is the process for return or replacement of LM101AJ?
All LM101AJ units undergo pre-shipment inspection (PSI). If there is an issue with LM101AJ, 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 LM101AJ part is unused and in its original packaging.
Return procedure for LM101AJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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