Overview
The REF200AU/2K5, produced by Texas Instruments, is a dual current source and current sink integrated circuit. This device combines three circuit building-blocks on a single monolithic chip: two 100-µA current sources and a current mirror. The sections are dielectrically isolated, making them completely independent and allowing the current sources to be used equally well as current sinks. The performance of each section is individually measured and laser-trimmed to achieve high accuracy at low cost.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Current Sources | 100 µA ±0.5% | - |
| Temperature Coefficient | ±25 ppm/°C | - |
| Voltage Compliance | 2.5 V to 40 V | V |
| Operating Temperature | –40°C to 85°C | °C |
| Storage Temperature | –55°C to 150°C | °C |
| Package | SOIC (8-pin) | - |
| Body Size | 3.91 mm × 4.90 mm | mm |
Key Features
- Completely floating: no power supply or ground connections
- High accuracy: 100 µA ±0.5%
- Low temperature coefficient: ±25 ppm/°C
- Wide voltage compliance: 2.5 V to 40 V
- Includes current mirror
- Dielectrically isolated sections for independence
- Current sources can be pin-strapped for various currents (50 µA, 100 µA, 200 µA, 300 µA, or 400 µA)
Applications
- Sensor excitation
- Biasing circuitry
- Offsetting current loops
- Low voltage references
- Charge-pump circuitry
- Hybrid microcircuits
Q & A
- What is the primary function of the REF200AU/2K5? The REF200AU/2K5 is a dual current source and current sink integrated circuit that includes two 100-µA current sources and a current mirror.
- What is the accuracy of the current sources? The current sources have an accuracy of 100 µA ±0.5%.
- What is the temperature coefficient of the REF200AU/2K5? The temperature coefficient is ±25 ppm/°C.
- What is the voltage compliance range of the REF200AU/2K5? The voltage compliance range is from 2.5 V to 40 V.
- What are the operating and storage temperature ranges? The operating temperature range is –40°C to 85°C, and the storage temperature range is –55°C to 150°C.
- In what package is the REF200AU/2K5 available? The REF200AU/2K5 is available in an SOIC (8-pin) package.
- Can the current sources be adjusted? Yes, the current sources can be pin-strapped for currents of 50 µA, 100 µA, 200 µA, 300 µA, or 400 µA.
- What are some common applications of the REF200AU/2K5? Common applications include sensor excitation, biasing circuitry, offsetting current loops, low voltage references, charge-pump circuitry, and hybrid microcircuits.
- How are the sections of the REF200AU/2K5 isolated? The sections are dielectrically isolated, making them completely independent.
- Can the current sources be used as current sinks? Yes, because the current sources are two-terminal devices, they can be used equally well as current sinks.
