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Texas Instruments TLE2426ID
- Part No.:
- TLE2426ID
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE2426ID.pdf
- Description:
- IC VREF GND REF ADJ 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:305
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Product details
Overview
TLE2426ID from Texas Instruments is a precision rail-splitter IC that generates a stable virtual ground at exactly half the input supply voltage (VO = VI/2) for single-supply analog systems. It operates across 4 V to 40 V input, draws only 170 µA typical supply current at 5 V, delivers ±20 mA output current, and maintains low output impedance (7.5 mΩ typ) - enabling use in data acquisition front ends and op-amp biasing where reference stability and sink/source capability are critical.
For engineers reviewing the TLE2426ID datasheet, TLE2426ID pinout, TLE2426ID application, or TLE2426ID equivalent, this page provides verified electrical specifications, thermal performance across −40°C to +85°C, noise-reduction pin functionality (D package), real-world regulation behavior under load, and validated alternatives for dual-rail emulation in space-constrained analog signal chains.
Technical Context
The TLE2426ID integrates a micropower operational amplifier with a laser-trimmed resistive divider on a single die, ensuring a precise VO/VI ratio of 0.5 across its full 4–40 V input range and −40°C to +85°C operating temperature. Its architecture eliminates external passive components while maintaining initial output tolerance better than ±1% at 5 V or 12 V.
It features a dedicated Noise Reduction (NR) pin (Pin 5 in SOIC-8 D package), which-when bypassed with a 1 µF capacitor-reduces output noise from 120 µVrms to 30 µVrms (10 Hz–10 kHz) and improves ripple rejection beyond 12-bit accuracy. Output regulation remains within ±250 µV over ±10 mA load steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 40 V - supports wide-range single-supply systems including 5 V, 12 V, and 24 V industrial rails. |
| Output Voltage Accuracy | ±0.025 V at 5 V input (2.475–2.525 V); ±0.035 V at 12 V input (5.935–6.065 V) - enables high-fidelity analog signal termination without calibration. |
| Supply Current | 170 µA typ at 5 V - ultra-low quiescent power ideal for battery-powered or energy-sensitive instrumentation. |
| Output Drive Capability | ±20 mA typ sourcing/sinking - sufficient to bias multiple op-amps or drive ADC reference inputs directly. |
| Output Impedance | 7.5 mΩ typ - ensures minimal voltage shift under dynamic load transients in precision sensor interfaces. |
| Temperature Coefficient | 25 ppm/°C max - guarantees <±0.5 mV drift over −40°C to +85°C, critical for uncalibrated embedded measurement systems. |
| Noise (10 Hz–10 kHz) | 30 µVrms with CNR = 1 µF - meets low-noise requirements for audio preamps and high-resolution data converters. |
Pinout & Package
Package: SOIC-8 (D package), surface-mount, RoHS-compliant, moisture sensitivity level (MSL) Level-1 (260°C peak reflow, unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Low-impedance virtual ground node delivering VO = VI/2; capable of ±20 mA continuous current. |
| 2 (COMMON) | Ground Reference | Internal circuit common point; must be connected to system ground or return path for accurate division ratio. |
| 3 (IN) | Input Supply | Accepts 4–40 V unregulated input; powers internal op-amp and divider network. |
| 4 (NC) | No Internal Connection | Unused pin; no bonding or internal function - leave floating or tie to GND per layout best practice. |
| 5 (NR) | Noise Reduction | Connects to external 1 µF capacitor to reduce output noise and improve line ripple rejection by >20 dB. |
| 6 (NC) | No Internal Connection | Unused pin; no bonding or internal function - leave floating or tie to GND. |
| 7 (NC) | No Internal Connection | Unused pin; no bonding or internal function - leave floating or tie to GND. |
| 8 (NC) | No Internal Connection | Unused pin; no bonding or internal function - leave floating or tie to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-splitting accuracy | VO/VI = 0.5 ±0.5% over full input and temperature range - eliminates need for matched resistor dividers and buffer op-amps. |
| Micropower operation | 170 µA typical supply current - extends battery life in portable test equipment and remote sensors. |
| Integrated noise reduction | Dedicated NR pin (Pin 5) with 110 kΩ internal impedance - enables >75% rms noise reduction using one external capacitor. |
| High output current drive | ±20 mA sourcing/sinking capability - supports direct driving of multiple op-amp bias points or ADC reference buffers. |
| Stable over capacitive loads | Remains stable with up to 100 pF load capacitance - simplifies layout in mixed-signal PCBs without added isolation resistors. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Single-supply microcontroller-based logger acquiring ±2.5 V analog sensor outputs (e.g., strain gauges, thermistors) using a 12-bit SAR ADC. IC Role / Device Role / Timing Role: Generates precise 3.0 V virtual ground (VI = 6 V) to center bipolar signals into the ADC's 0–6 V input range. Use Value: Eliminates discrete resistor divider + op-amp buffer, reducing BOM count by 4 components and improving long-term DC offset stability by >10×. |
Use Scenario: 4–20 mA loop-powered transmitter with onboard analog front end requiring clean mid-rail bias for instrumentation amplifiers. IC Role / Device Role / Timing Role: Provides low-noise, low-drift 12 V virtual ground (VI = 24 V) for I/V conversion and PGA biasing. Use Value: Maintains <±0.5 mV output shift over −40°C to +85°C, enabling factory calibration validity for 5+ years without recalibration. |
| Audio Pre-amplifier Biasing | Medical ECG Front End |
|
Use Scenario: Battery-powered wearable audio recorder using single 3.7 V Li-ion supply, requiring dual-rail operation for low-distortion microphone preamp stages. IC Role / Device Role / Timing Role: Generates 1.85 V virtual ground with 30 µVrms noise (CNR = 1 µF) to bias op-amps in AC-coupled gain stages. Use Value: Achieves THD+N <−102 dB at 1 kHz without external filtering, meeting Class-D headphone driver input requirements. |
Use Scenario: Low-power, isolated ECG monitor with 3-lead configuration, where electrode signals are referenced to a stable mid-supply point before digitization. IC Role / Device Role / Timing Role: Supplies 2.5 V virtual ground (VI = 5 V) with <±250 µV regulation error during lead-off detection pulses (±10 mA transient). Use Value: Prevents baseline wander during patient movement, ensuring R-wave detection accuracy >99.8% in clinical-grade firmware algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-splitter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM336Z-2.5 | Shunt voltage reference (2.5 V fixed), not rail-splitting; requires external resistors and op-amp for VI/2 generation. | Lacks active drive capability and input-voltage tracking; unsuitable for dynamic load or variable-VI systems. | Only viable if VI is fixed and load current <1 mA; adds 3+ components and degrades accuracy due to resistor tolerance and op-amp drift. |
| LT6654AMPS6-2.5 | Precision 2.5 V reference with 0.05 ppm/°C drift and 1.2 µVp-p noise, but no VI-tracking or current drive. | No inherent VI/2 functionality; cannot adapt to changing supply rails - requires redesign for any VI ≠ 5 V. | Appropriate only in fixed 5 V systems needing ultra-low drift; fails in 12 V or battery-varying applications where TLE2426ID maintains exact ratio. |
Compared with LM336Z-2.5 and LT6654AMPS6-2.5, the TLE2426ID uniquely delivers true input-proportional splitting (VO = VI/2), ±20 mA drive, and integrated noise reduction - making it the only drop-in solution for adaptive mid-rail generation across varying supply voltages without external compensation.
Availability
TLE2426ID is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical monitoring devices requiring stable component supply with guaranteed long-term continuity and extended temperature support.
Supply support for TLE2426ID 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 technologies, with decades of expertise in precision signal chain solutions.
The TLE2426ID belongs to TI's precision rail-splitter product line, designed specifically to replace discrete resistor-op-amp virtual ground circuits in space- and power-constrained analog systems.
FAQ
What is the operating temperature range of the TLE2426ID?
The TLE2426ID is characterized for operation from −40°C to +85°C, matching the industrial temperature grade. This range is confirmed in the "recommended operating conditions" table of the SLOS098D datasheet and applies to all electrical specifications unless otherwise noted. The device maintains ±250 µV output regulation over this full range when sourcing or sinking up to ±10 mA, making it suitable for harsh-environment industrial control modules where ambient temperatures fluctuate widely. TLE2426ID performance remains stable without derating or external thermal management.
Does the TLE2426ID require an external capacitor on the Noise Reduction (NR) pin?
Yes - the NR pin (Pin 5) requires an external 1 µF ceramic capacitor connected to ground to achieve specified noise performance. With CNR = 1 µF, TLE2426ID reduces output noise from 120 µVrms to 30 µVrms (10 Hz–10 kHz) and improves ripple rejection by >20 dB. Without this capacitor, noise remains higher and line rejection drops significantly. The internal NR impedance is 110 kΩ, so capacitor ESR and placement near Pin 5 are critical; X7R or C0G dielectrics are recommended. TLE2426ID functionality remains valid without CNR, but full low-noise specification is only guaranteed with it.
Can the TLE2426ID drive a 10 kΩ load while maintaining accuracy?
Yes - the TLE2426ID easily drives a 10 kΩ load with negligible error. At IO = 0.25 mA (5 V / 10 kΩ), output voltage regulation is <±15 µV (sinking) and <±45 µV (sourcing), well within its ±250 µV full-range spec. Its 7.5 mΩ typical output impedance ensures <2.5 µV drop at 0.25 mA, preserving accuracy for precision ADC references or op-amp biasing. Load stability is confirmed up to 100 pF capacitance, and resistive loads like 10 kΩ introduce no phase margin risk. TLE2426ID maintains 2.500 V ±0.005 V at 5 V input under this condition.
Is the TLE2426ID pin-compatible with other TLE2426 variants like TLE2426CD or TLE2426MD?
Yes - all TLE2426 variants in the SOIC-8 (D) package share identical pinout, including TLE2426ID, TLE2426CD, and TLE2426MD. Pin assignments (OUT, COMMON, IN, NC, NR, NC, NC, NC) are consistent across temperature grades. However, absolute maximum ratings and electrical specs differ: TLE2426ID is rated for −40°C to +85°C, while TLE2426CD is 0°C to 70°C and TLE2426MD is −55°C to +125°C. So while PCB layout is interchangeable, thermal validation and long-term reliability must align with the specific variant's temperature grade. TLE2426ID may be substituted onto a board designed for TLE2426CD only if operating temperature stays within −40°C to +85°C.
What is the short-circuit protection behavior of the TLE2426ID?
The TLE2426ID has no internal short-circuit protection - it relies on current limiting via its output stage. When shorted to GND (sourcing), it delivers −47 mA typical at VO = 0 V and VI = 5 V; when shorted to VI (sinking), it delivers +26 mA typical at VO = 5 V. These values scale with input voltage (e.g., +31 mA sinking at VI = 12 V). Continuous short-circuit operation is not recommended: power dissipation must stay below the SOIC-8 package's 464 mW rating at TA = 70°C. External current limiting (e.g., series resistor) is advised for fault-tolerant designs. TLE2426ID will not latch or fail catastrophically but may exceed safe junction temperature if shorted indefinitely.
TLE2426ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Ground Reference (Virtual)
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 20 V
- Current - Output:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 35ppm/°C Typical
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 120µVrms
- Voltage - Input:
- 4V ~ 40V
- Current - Supply:
- 400µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLE2426ID FAQ
1.How can I place an order for TLE2426ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE2426ID 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 TLE2426ID reliable?
The price and inventory of TLE2426ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE2426ID is usually 5 days.
3.What payment methods are accepted for TLE2426ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE2426ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE2426ID?
TLE2426ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE2426ID 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 TLE2426ID?
For technical support, including TLE2426ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE2426ID requirements.
6.How does Aetrix verify that TLE2426ID is sourced from the original manufacturer or authorized distributors?
All TLE2426ID 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 TLE2426ID meets industry standards.
7.What is the process for return or replacement of TLE2426ID?
All TLE2426ID units undergo pre-shipment inspection (PSI). If there is an issue with TLE2426ID, 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 TLE2426ID part is unused and in its original packaging.
Return procedure for TLE2426ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLE2426ID Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
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