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Texas Instruments TLE2161IDR
- Part No.:
- TLE2161IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE2161IDR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,116
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Product details
Overview
TLE2161IDR from Texas Instruments is a JFET-input, decompensated, high-output-drive µPower operational amplifier optimized for precision analog signal conditioning in industrial and test equipment. It delivers ±2.5 V min output swing into 100 Ω at ±5 V supplies, 10 V/µs typical slew rate, 6.5 MHz gain-bandwidth product, and 500 µV max input offset voltage over –40°C to 85°C.
For engineers reviewing the TLE2161IDR datasheet, TLE2161IDR pinout, TLE2161IDR application, or TLE2161IDR equivalent, key selection criteria include its JFET-input low bias current (5 pA typ), high open-loop gain (280 V/mV typ), wide supply range (±3.5 V to ±18 V), and stability at closed-loop gains ≥5 - critical for active filter, sensor interface, and high-fidelity line driver designs.
Technical Context
The TLE2161IDR uses TI's Excalibur JFET process to achieve ultra-low input bias current and exceptional long-term offset stability (0.04 µV/month typ). Its decompensated architecture enables high-speed performance while maintaining dc precision: 280 V/mV open-loop gain and 65 dB minimum CMRR ensure accurate amplification of small differential signals amid common-mode noise.
It operates across ±3.5 V to ±18 V dual supplies with rail-to-rail output capability limited by load - delivering ±12.5 V min into 600 Ω at ±15 V, and ±2.5 V min into 100 Ω at ±5 V. Phase margin remains stable (70°–84°) across 100 Ω to 10 kΩ loads when configured for AV ≥ 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±3.5 V to ±18 V - supports single-supply biasing via mid-rail reference and accommodates legacy ±5 V and ±15 V systems without level-shifting. |
| Slew Rate | 10 V/µs typ - enables faithful reproduction of fast transients in pulse amplification and active filter stages without slew-induced distortion. |
| Gain-Bandwidth Product | 6.5 MHz typ - allows stable closed-loop gain ≥5 up to ~1.3 MHz, suitable for anti-aliasing filters and precision instrumentation amplifiers. |
| Input Offset Voltage | 500 µV max (–40°C to 85°C) - ensures sub-millivolt dc accuracy in strain gauge, thermocouple, and RTD signal chains without frequent recalibration. |
| Input Bias Current | 5 pA typ - minimizes voltage error across high-impedance sources (e.g., piezoelectric sensors, pH electrodes) and preserves signal integrity in charge-amplifier topologies. |
| Output Drive Capability | ±2.5 V min into 100 Ω at ±5 V - drives coaxial cables, ADC input buffers, and low-impedance transducers directly without external buffer stages. |
| Open-Loop Gain | 280 V/mV typ - provides >100 dB loop gain at 1 kHz, enabling high-precision integrators and low-error summing junctions. |
Pinout & Package
Package: SOIC-8 (D package), surface-mount, tape-and-reel compatible. Pin count: 8. Thermal resistance: 157 °C/W (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (N1) | Connects to external potentiometer for manual input offset trimming; required only in ultra-high-precision dc-coupled applications. |
| 2 | Inverting Input (IN–) | Differential input node; high-impedance JFET gate structure enables minimal loading of feedback networks and sensor sources. |
| 3 | Non-Inverting Input (IN+) | Differential input node; matched to IN– for optimal common-mode rejection and bias current cancellation in balanced configurations. |
| 4 | VCC– | Negative supply rail; must be decoupled locally with ≥0.1 µF ceramic capacitor to suppress high-frequency supply noise coupling. |
| 5 | Offset Null (N2) | Second terminal of offset null network; used with Pin 1 to adjust input stage quiescent operating point. |
| 6 | Output (OUT) | Class-AB output stage capable of sourcing/sinking ±80 mA; designed for direct drive of 100 Ω–10 kΩ loads without thermal shutdown under continuous operation. |
| 7 | VCC+ | Positive supply rail; shares same decoupling requirement as Pin 4 to maintain PSRR above 75 dB across 10 Hz–100 kHz. |
| 8 | No Connect (NC) | Internally unconnected; must remain floating - no external connection or pull-up/down allowed per TI design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| JFET-input architecture | 5 pA typical input bias current enables use with megohm-range source impedances without significant dc error. |
| Excalibur process technology | 0.04 µV/month typical long-term offset drift ensures calibration stability over years in unattended monitoring systems. |
| Decompensated unity-gain stable variant | Stable only at closed-loop gains ≥5 - trades off low-gain flexibility for higher bandwidth and slew rate versus compensated op-amps. |
| High output current capability | ±80 mA absolute maximum output current supports driving capacitive loads up to 1000 pF with controlled phase margin. |
| Wide temperature grade | Specified from –40°C to +85°C (I-suffix) - qualified for industrial control cabinets, outdoor instrumentation, and automotive under-hood auxiliary circuits. |
Applications
| Strain Gauge Signal Conditioning | Active Low-Pass Filter Stage |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs in load cells and pressure transducers within factory automation PLC modules. IC Role / Device Role / Timing Role: Primary gain stage with programmable offset nulling to reject bridge imbalance and amplify differential signal before 24-bit sigma-delta ADC. Use Value: 500 µV max offset and 5 pA bias current minimize zero-point drift and bridge-source loading, preserving <0.02% full-scale measurement accuracy. | Use Scenario: Implementing 4th-order Butterworth low-pass filtering at 100 kHz cutoff in medical ECG front-end signal paths. IC Role / Device Role / Timing Role: Second-stage amplifier in cascaded Sallen-Key topology, providing gain and driving 10 kΩ ADC input impedance. Use Value: 10 V/µs slew rate prevents transient overshoot on QRS complexes; 6.5 MHz GBW ensures flat group delay response through passband. |
| High-Voltage Line Driver | Thermocouple Cold-Junction Compensation |
Use Scenario: Driving ±10 V analog signals over 50 Ω coaxial cable to data acquisition units in test benches and ATE systems. IC Role / Device Role / Timing Role: Output buffer with short-circuit protected output stage, configured as unity-gain inverter with matched termination. Use Value: ±2.5 V min swing into 100 Ω at ±5 V supply enables full-scale transmission without rail clipping; ±80 mA drive handles cable capacitance and connector mismatch. | Use Scenario: Precision cold-junction compensation in industrial kiln controllers using Type K thermocouples referenced to ambient PCB temperature. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier front-end, measuring thermistor voltage while rejecting common-mode noise from heater switching. Use Value: 65 dB min CMRR rejects 60 Hz pickup from adjacent AC lines; 0.04 µV/month offset stability maintains <0.1°C calibration accuracy over 5-year deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-drive, JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134UA | Unity-gain stable; lower slew rate (8 V/µs); higher supply current (4 mA); no offset null pins. | Better suited for audio line drivers and unity-gain buffers where stability at AV = 1 is mandatory. | Select OPA2134UA when gain ≥1 is required and offset trimming is unnecessary; avoid if closed-loop gain ≥5 and low power (<350 µA) are critical. |
| TL072CDR | Lower cost; higher input offset (10 mV max); slower slew rate (13 V/µs but higher distortion); no guaranteed 100 Ω drive spec. | Appropriate for non-precision general-purpose amplification where dc accuracy and long-term stability are secondary. | Select TL072CDR for cost-sensitive consumer-grade signal routing; avoid in metrology-grade or long-life field instruments requiring sub-mV offset. |
Compared with OPA2134UA and TL072CDR, the TLE2161IDR uniquely combines decompensated speed (10 V/µs), ultra-low bias current (5 pA), and factory-tested 500 µV max offset over industrial temperature - making it the only option among the three qualified for high-impedance sensor interfaces demanding both speed and dc fidelity.
Availability
TLE2161IDR is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, precision active filter design, and high-voltage line driver applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TLE2161IDR 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 and embedded processing solutions, with decades of heritage in precision op-amp innovation and industrial-grade reliability.
The TLE2161IDR belongs to TI's Excalibur JFET-input op-amp family, engineered for applications demanding simultaneous high speed, low input current, and long-term dc stability - especially in sensor front-ends, test equipment, and ruggedized measurement systems.
FAQ
What is the minimum stable closed-loop gain for the TLE2161IDR?
The TLE2161IDR is decompensated and requires a minimum closed-loop gain of 5 for stable operation. Attempting unity-gain or gain-of-2 configurations may cause oscillation or excessive ringing due to insufficient phase margin. For lower-gain applications, consider unity-gain stable alternatives like the OPA2134UA.
Does the TLE2161IDR support rail-to-rail input or output operation?
The TLE2161IDR does not support rail-to-rail input or output. Its common-mode input range is –1.6 V to +4 V at ±5 V supplies, and output swing is typically ±2.5 V into 100 Ω. It cannot swing within 1.5 V of either rail - unlike modern rail-to-rail op-amps - so proper headroom must be designed into all stages using the TLE2161IDR.
Can the offset null pins (1 and 5) of the TLE2161IDR be left unconnected?
No - Pins 1 (N1) and 5 (N2) form a dedicated offset null network and must be connected to a 10 kΩ potentiometer (wiper to VCC–, ends to Pins 1 and 5) if dc offset correction is required. Leaving them open may result in unpredictable input stage biasing and increased offset scatter. If trimming is unnecessary, connect Pin 1 to Pin 5 via a short trace per TI layout guidance.
What is the maximum capacitive load the TLE2161IDR can drive without instability?
The TLE2161IDR maintains ≥70° phase margin driving up to 1000 pF when configured with RL ≥ 600 Ω and closed-loop gain ≥ 5. For heavier capacitive loads (e.g., >2000 pF), add a series isolation resistor (10–100 Ω) between the output and load to preserve stability - verified in TI's SLOS049D datasheet Figure 3.
How does the TLE2161IDR's long-term offset drift compare to standard bipolar op-amps?
The TLE2161IDR exhibits 0.04 µV/month typical long-term input offset drift - over 10× better than most bipolar-input op-amps (which average 0.5–2 µV/month). This stability stems from TI's Excalibur JFET process and makes the TLE2161IDR suitable for unattended field instruments where recalibration intervals exceed 12 months.
TLE2161IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Excalibur™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 6.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 pA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 290µA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLE2161IDR FAQ
1.How can I place an order for TLE2161IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE2161IDR 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 TLE2161IDR reliable?
The price and inventory of TLE2161IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE2161IDR is usually 5 days.
3.What payment methods are accepted for TLE2161IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE2161IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE2161IDR?
TLE2161IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE2161IDR 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 TLE2161IDR?
For technical support, including TLE2161IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE2161IDR requirements.
6.How does Aetrix verify that TLE2161IDR is sourced from the original manufacturer or authorized distributors?
All TLE2161IDR 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 TLE2161IDR meets industry standards.
7.What is the process for return or replacement of TLE2161IDR?
All TLE2161IDR units undergo pre-shipment inspection (PSI). If there is an issue with TLE2161IDR, 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 TLE2161IDR part is unused and in its original packaging.
Return procedure for TLE2161IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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