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Texas Instruments LM101AH
- Part No.:
- LM101AH
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LM101AH.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:189
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Product details
Overview
LM101AH from Texas Instruments is a general-purpose operational amplifier with 3 mV maximum input offset voltage, 100 nA maximum input bias current, and 10 V/μs slew rate over −55°C to +125°C. It features external frequency compensation via a single 30 pF capacitor and is used in precision integrators, sample-and-hold circuits, and fast AC/DC converters.
For engineers reviewing the LM101AH datasheet, LM101AH pinout, LM101AH application, or LM101AH equivalent, key selection criteria include its wide temperature range, low input current drift (0.1 nA/°C), uncompensated architecture for application-tailored stability, and TO-99 metal-can package suitability for high-reliability analog signal conditioning.
Technical Context
The LM101AH implements a classic bipolar-input op-amp topology with internal input protection diodes and output short-circuit protection. Its open-loop gain exceeds 50 V/mV at ±15 V supply, and it supports feedforward compensation for full-wave rectifier applications without filtering.
It operates across ±5 V to ±22 V supply rails, delivers ±13 V output swing into 2 kΩ, and maintains stable operation with common-mode input voltages up to ±15 V-enabling use in rail-to-rail input-capable configurations when supplied at ±20 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 3 mV max over −55°C to +125°C - enables precision DC amplification without trimming in military-grade systems |
| Input Bias Current | 100 nA max over −55°C to +125°C - supports high-impedance sensor interfaces and long-interval integrators |
| Slew Rate | 10 V/μs as summing amplifier - allows fast transient response in active filters and pulse conditioning |
| Supply Voltage Range | ±5 V to ±22 V - accommodates wide dynamic range signal chains and legacy industrial power rails |
| Operating Temperature | −55°C to +125°C - qualified for aerospace, downhole, and extended-range automotive control modules |
| Compensation | External 30 pF capacitor - permits optimization for stability (low-frequency) or bandwidth (>3 MHz) per circuit requirements |
| Output Short Circuit | Continuous - eliminates need for external current-limiting resistors in fault-prone test equipment interfaces |
Pinout & Package
LM101AH uses the TO-99 metal-can package (package number LMC0008C), 8-pin, hermetically sealed, with center pin (Pin 5) as case ground and thermal path. Designed for high-reliability analog environments requiring EMI immunity and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null | Connects to potentiometer wiper for manual input offset adjustment - essential for zero-drift integrator calibration |
| 2 | Inverting Input | Differential input node with 1.5 MΩ typical input resistance - accepts feedback networks up to 10 MΩ without significant error |
| 3 | Non-Inverting Input | Differential input node with matched input impedance - enables balanced signal acquisition and instrumentation amplifier front-ends |
| 4 | V− | Negative supply terminal - must be decoupled with ≥0.1 μF ceramic capacitor near pin for stability under fast load transients |
| 5 | Case Ground | Hermetic metal-can body connection - provides EMI shielding and thermal conduction path to heatsink or PCB copper plane |
| 6 | Output | Class-A output stage capable of ±13 V swing into 2 kΩ - drives coaxial cables and relay coils directly without buffering |
| 7 | V+ | Positive supply terminal - requires independent bypassing from V− to prevent supply-induced crosstalk in multi-amplifier layouts |
| 8 | Compensation | External capacitor connection point for dominant-pole frequency control - sets unity-gain bandwidth and phase margin |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up on common-mode overvoltage | Operates safely even when inputs exceed supply rails - critical for sensor fault detection in motor control feedback loops |
| Input/output overload protection | Withstands ±30 V differential input and continuous output short - reduces system-level fuse and TVS requirements |
| Specified drift over full temp range | 3 μV/°C max offset drift and 0.1 nA/°C bias current drift - enables uncalibrated operation in oil & gas downhole telemetry |
| Feedforward compensation support | Enables fast full-wave rectifier design without output filter - cuts latency in real-time RMS-to-DC conversion |
| Matched transistor pair replacement | Delivers lower offset and drift than discrete buffered op-amps - reduces BOM count and board area in legacy analog subsystems |
Applications
| Integrator-Based Timer | High-Voltage Sensor Interface |
|---|---|
Use Scenario: Long-duration timing in industrial PLC watchdog circuits requiring 10–100 s intervals with <1% drift. IC Role / Device Role / Timing Role: Precision integrator core with bias-current compensation network (R1/R2/C1) to cancel 0.1 nA/°C drift. Use Value: Eliminates periodic recalibration and enables single-chip timer implementation over −55°C to +125°C without external DAC or microcontroller. | Use Scenario: Isolated voltage monitoring of ±200 V DC bus in solar inverter DC-link using resistive divider and level-shifting. IC Role / Device Role / Timing Role: High-input-impedance buffer and difference amplifier front-end with ±15 V common-mode input capability. Use Value: Maintains accuracy despite 100 nA input bias current across 10 MΩ divider arms, reducing measurement error to <0.05% at 25°C. |
| Fast AC/DC Converter | Low-Drift Sample-and-Hold |
Use Scenario: Real-time RMS-to-DC conversion in power quality analyzers needing sub-10 μs response to 50/60 Hz transients. IC Role / Device Role / Timing Role: Feedforward-compensated full-wave rectifier stage with no output filter capacitor required. Use Value: Achieves 10 V/μs slew-limited rise time and eliminates 100 Hz ripple artifacts that degrade FFT-based harmonic analysis. | Use Scenario: Data acquisition in seismic sensor front-ends requiring 16-bit linearity over 100 ms hold periods at −40°C to +85°C. IC Role / Device Role / Timing Role: Low-leakage hold amplifier with polycarbonate dielectric sampling capacitor and offset-null calibration. Use Value: Limits droop to <1 LSB over 100 ms at 25°C, leveraging 3 mV max offset and 0.1 nA/°C drift to maintain accuracy without auto-zero circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM101AJ | Same electrical specs but CDIP-8 package (NAB0008A), non-hermetic plastic, −55°C to +125°C rating | Lacks TO-99 EMI shielding and thermal conductivity; unsuitable for high-noise RF-adjacent or high-power dissipation layouts | Select LM101AJ only when cost-sensitive commercial designs require tube packaging and PCB space constraints preclude metal-can mounting. |
| LM201AH/NOPB | Identical TO-99 package and pinout, but rated −40°C to +85°C; 100 nA input bias current spec applies only to 25°C, not full range | Not qualified for extended temperature operation; offset drift and bias current increase significantly above 85°C | Choose LM201AH/NOPB only for industrial control panels with forced-air cooling and ambient ≤85°C - avoid in uncontrolled outdoor enclosures. |
Compared with LM101AJ and LM201AH/NOPB, the LM101AH uniquely combines hermetic TO-99 packaging, full −55°C to +125°C guaranteed performance, and 100 nA input bias current across that entire range - making it the sole option for high-reliability analog signal conditioning where thermal cycling, EMI, and long-term drift are mission-critical.
Availability
LM101AH is available at Aetrix Electronics and suitable for precision integrators, high-voltage sensor interfaces, fast AC/DC converters, and low-drift sample-and-hold circuits requiring stable component supply across extended temperature ranges.
Supply support for LM101AH 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 company specializing in analog and embedded processing technologies, with leadership in high-reliability op-amps and precision signal-chain solutions.
The LM101A series was designed for military, aerospace, and industrial applications demanding guaranteed performance across extreme temperatures and long-term stability without auto-zero or chopper architecture.
FAQ
What is the maximum supply voltage for LM101AH?
The LM101AH supports ±22 V maximum supply voltage per Absolute Maximum Ratings. Operation at ±20 V is recommended for full specification compliance across −55°C to +125°C, delivering ±13 V output swing into 2 kΩ while maintaining 3 mV max input offset voltage and 100 nA max input bias current. Exceeding ±22 V risks permanent damage to internal junctions.
Does LM101AH require external compensation capacitors?
Yes, the LM101AH requires an external 30 pF capacitor between Pin 1 (Offset Null) and Pin 8 (Compensation) for stable unity-gain operation. This external compensation allows designers to optimize bandwidth and phase margin: increasing capacitance improves low-frequency stability, while reducing it (with appropriate layout controls) extends small-signal bandwidth beyond 3 MHz for fast pulse applications.
What is the purpose of Pin 5 on LM101AH?
Pin 5 on LM101AH is the case ground terminal, connected directly to the TO-99 metal-can body. It serves as both a thermal conduction path to the PCB or heatsink and an EMI shield reference. TI recommends soldering this pin to a large copper pour for optimal thermal dissipation and noise rejection - especially critical in high-gain, low-level signal paths like seismic sensor front-ends where 0.1 nA/°C bias drift must be minimized.
Can LM101AH drive capacitive loads directly?
No, LM101AH cannot reliably drive capacitive loads >100 pF without isolation. The datasheet specifies stable operation only for capacitive loads smaller than 100 pF. For larger loads (e.g., coaxial cables or ADC input capacitors), TI recommends adding an RC isolation network (e.g., 100 Ω + 100 pF) between Pin 6 (Output) and the load - as shown in Figure 37 - to prevent peaking and oscillation caused by phase shift in the feedback loop.
How does LM101AH differ from LM301A in terms of temperature range?
The LM101AH is specified over −55°C to +125°C, while the LM301A operates from 0°C to +70°C. This makes LM101AH suitable for aerospace, downhole, and automotive under-hood applications where ambient extremes exceed commercial limits. Electrical parameters like 3 mV max offset voltage and 100 nA max input bias current are guaranteed across the full −55°C to +125°C range for LM101AH - unlike LM301A, whose specs degrade outside 0°C to +70°C.
LM101AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Bulk
- 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:
- TO-99-8
LM101AH FAQ
1.How can I place an order for LM101AH through Aetrix?
Please submit a Request for Quotation (RFQ) for LM101AH 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 LM101AH reliable?
The price and inventory of LM101AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM101AH is usually 5 days.
3.What payment methods are accepted for LM101AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM101AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM101AH?
LM101AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM101AH 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 LM101AH?
For technical support, including LM101AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM101AH requirements.
6.How does Aetrix verify that LM101AH is sourced from the original manufacturer or authorized distributors?
All LM101AH 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 LM101AH meets industry standards.
7.What is the process for return or replacement of LM101AH?
All LM101AH units undergo pre-shipment inspection (PSI). If there is an issue with LM101AH, 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 LM101AH part is unused and in its original packaging.
Return procedure for LM101AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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