Overview
The REF200AU/2K5G4, 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 Source Output | 100 µA ±0.5% | - |
| Temperature Coefficient | ±25 ppm/°C | - |
| Voltage Compliance | 2.5 V to 40 V | V |
| Operating Temperature | –40 to 85 °C | °C |
| Storage Temperature | –55 to 150 °C | °C |
| Package | SOIC (8-pin) | - |
| Body Size | 3.91 mm × 4.90 mm | mm |
| Current Mirror Gain | 0.995 to 1.005 | - |
| Current Mirror Temperature Drift | 25 ppm/°C | - |
| Output Impedance | 40 to 100 MΩ | MΩ |
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, 400 µA)
Applications
- Sensor excitation
- Biasing circuitry
- Offsetting current loops
- Low voltage references
- Charge-pump circuitry
- Hybrid microcircuits
Q & A
- What is the REF200AU/2K5G4 used for? The REF200AU/2K5G4 is used as a dual current source and current sink, and it includes a current mirror, making it suitable for various applications such as sensor excitation, biasing circuitry, and low voltage references.
- What is the accuracy of the current sources in the REF200AU/2K5G4? The current sources have an accuracy of 100 µA ±0.5%.
- What is the temperature coefficient of the REF200AU/2K5G4? The temperature coefficient is ±25 ppm/°C.
- What is the voltage compliance range of the REF200AU/2K5G4? The voltage compliance range is from 2.5 V to 40 V.
- 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 package is the REF200AU/2K5G4 available in? The REF200AU/2K5G4 is available in an SOIC (8-pin) package.
- What is the operating temperature range of the REF200AU/2K5G4? The operating temperature range is from –40 to 85 °C.
- How are the sections of the REF200AU/2K5G4 isolated? The sections are dielectrically isolated, making them completely independent.
- Can the REF200AU/2K5G4 be used as a current sink? Yes, because the current sources are two-terminal devices, they can be used equally well as current sinks.
- What is the typical output impedance of the current mirror in the REF200AU/2K5G4? The typical output impedance is between 40 to 100 MΩ.
