Overview
The LT1009CLPR is a precision-trimmed 2.5-V shunt regulator produced by Texas Instruments. This integrated circuit features low dynamic impedance and a wide operating current range, making it suitable for various precision voltage reference applications. The device is characterized by its high accuracy and stability, with a maximum initial tolerance of ±5 mV in the LP package and ±10 mV in the D and PW packages. The LT1009CLPR can be used as a terminal-for-terminal replacement for the LM136-2.5, eliminating the need for an external trim network.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Reference Voltage (VZ) | 2.495 | 2.5 | 2.505 | V |
| Initial Accuracy | 0.2% | % | ||
| Dynamic Impedance (rZ) | 0.2 | 0.4 | 0.6 | Ω |
| Temperature Coefficient | 25 | ppm/°C | ||
| Shunt Current - Min | 400 | 10,000 | μA | |
| Operating Temperature Range | -40 | 85 | °C | |
| Package/Case | TO-92-3 |
Key Features
- Excellent Temperature Stability: The LT1009CLPR has a low temperature coefficient of 25 ppm/°C, ensuring stable operation over a wide temperature range.
- High Initial Accuracy: With an initial accuracy of ±0.2%, this device provides precise voltage reference.
- Low Dynamic Impedance: The dynamic impedance is as low as 0.6 Ω, which is beneficial for maintaining stability in varying current conditions.
- Wide Operating Current Range: The device can operate with shunt currents ranging from 400 μA to 10 mA.
- Directly Interchangeable with LM136-2.5: It can replace the LM136-2.5 without the need for an external trim network.
- No Adjustment Required: Although it has an adjustment terminal (ADJ) for fine-tuning, the LT1009CLPR typically needs no adjustments for minimum temperature coefficient.
Applications
- 5-V System References: Used as a precise voltage reference in 5-V systems.
- Analog-to-Digital Converter (ADC) and Digital-to-Analog Converter (DAC) References: Suitable for use in ADC and DAC applications requiring stable voltage references.
- Power-Supply Monitors: Can be used to monitor and regulate power supplies.
- Digital Voltmeters and Current-Loop Measurement and Control Systems: Applicable in digital voltmeters and current-loop measurement and control systems due to its precision and stability.
Q & A
- What is the nominal output voltage of the LT1009CLPR?
The nominal output voltage is 2.5 V.
- What is the initial accuracy of the LT1009CLPR?
The initial accuracy is ±0.2%.
- What is the dynamic impedance of the LT1009CLPR?
The dynamic impedance is as low as 0.6 Ω.
- What is the operating temperature range of the LT1009CLPR?
The operating temperature range is from -40°C to 85°C.
- Can the LT1009CLPR be used as a replacement for the LM136-2.5?
- Does the LT1009CLPR require any adjustments for minimum temperature coefficient?
No, it typically needs no adjustments for minimum temperature coefficient.
- What are some common applications of the LT1009CLPR?
Common applications include 5-V system references, ADC and DAC references, power-supply monitors, digital voltmeters, and current-loop measurement and control systems.
- What is the package type of the LT1009CLPR?
The package type is TO-92-3.
- What is the minimum shunt current for the LT1009CLPR?
The minimum shunt current is 400 μA.
- What is the maximum shunt current for the LT1009CLPR?
The maximum shunt current is 10 mA.
