Overview
The LT1009CLPRE3, produced by Texas Instruments, is a precision-trimmed 2.5-V shunt regulator. This component features low dynamic impedance and a wide operating current range, making it suitable for various precision voltage reference applications. The LT1009 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. It also includes an adjustable terminal to fine-tune the reference voltage by ±5% to eliminate system errors.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (VZ) | 2.495 | 2.5 | 2.505 | V |
| Reverse Dynamic Impedance (rZ) | 0.2 | 0.4 | 1.0 | Ω |
| Temperature Stability (ΔVZ/ΔTemp) | 15 | 25 | 35 | ppm/°C |
| Long-Term Stability | 20 | ppm/kHr | ||
| Operating Temperature Range (LT1009C) | 0 | 70 | °C | |
| Operating Temperature Range (LT1009I) | –40 | 85 | °C |
Key Features
- Precision-trimmed 2.5-V reference voltage with low dynamic impedance.
- Wide operating current range.
- Adjustable reference voltage via the ADJ terminal to eliminate system errors.
- Low initial voltage tolerance and temperature coefficient.
- No external trim network required, making it a terminal-for-terminal replacement for the LM136-2.5.
- Low noise voltage and high stability over temperature.
Applications
- 5-V system references.
- 8-bit analog-to-digital converter (ADC) and digital-to-analog converter (DAC) references.
- Power-supply monitors.
- Digital voltmeters.
- Current-loop measurement and control systems.
Q & A
- What is the reference voltage of the LT1009CLPRE3? The reference voltage is 2.5 V with a maximum initial tolerance of ±5 mV in the LP package and ±10 mV in the D and PW packages.
- What is the operating temperature range for the LT1009C and LT1009I? The LT1009C operates from 0°C to 70°C, while the LT1009I operates from –40°C to 85°C.
- Can the LT1009CLPRE3 be adjusted? Yes, the reference voltage can be adjusted by ±5% using the ADJ terminal.
- What are the typical applications of the LT1009CLPRE3? It is used in 5-V system references, ADC and DAC references, power-supply monitors, digital voltmeters, and current-loop measurement and control systems.
- What is the reverse dynamic impedance of the LT1009CLPRE3? The reverse dynamic impedance is typically 0.4 Ω.
- Does the LT1009CLPRE3 require an external trim network? No, it does not require an external trim network, making it a terminal-for-terminal replacement for the LM136-2.5.
- What is the long-term stability of the LT1009CLPRE3? The long-term stability is 20 ppm/kHr.
- How does the LT1009CLPRE3 handle temperature stability? It has a temperature stability of 15 to 35 ppm/°C.
- Is the LT1009CLPRE3 suitable for high-precision applications? Yes, it is suitable due to its high accuracy and low noise voltage.
- Where can I find more detailed specifications for the LT1009CLPRE3? Detailed specifications can be found in the datasheet available on the Texas Instruments website or other authorized distributors.
