Overview
The ADN8810ACPZ is a 12-bit high output current source produced by Analog Devices Inc. This device is designed to provide an adjustable full-scale output current of up to 300 mA, making it particularly suited for tunable laser control and other high-current applications. The output current is set using two external sense resistors, and the device features a 3-wire SPI interface for control by a host CPU or microcontroller. The ADN8810ACPZ is packaged in a 24-lead LFCSP (4mm x 4mm x 0.75mm) and is known for its high precision, low noise, and long-term stability, which are crucial for laser diode applications.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | N | 12 Bits | |||
| Integral Nonlinearity (INL) | ±4 LSB | ||||
| Differential Nonlinearity (DNL) | ±0.75 LSB | ||||
| Offset | 4 | 8 | LSB | ||
| Offset Drift | 15 ppm/°C | ||||
| Gain Error | 1 %FS | ||||
| Reference Input Voltage | VREF | 3.9 | 4.096 | 4.3 | V |
| Maximum Full-Scale Output Current | 300 | mA | |||
| Output Compliance Voltage | 2.5 | V | |||
| Clock Frequency | fCLK | 12.5 | MHz | ||
| Minimum Operating Temperature | -40 | °C | |||
| Maximum Operating Temperature | 85 | °C |
Key Features
- High precision 12-bit current source with adjustable full-scale output current up to 300 mA.
- Low noise and digital feedthrough to ensure low jitter operation for laser diode applications.
- Output compliance voltage of 2.5 V, even at output currents up to 300 mA.
- 3-wire SPI interface for control by a host CPU or microcontroller.
- 3-bit address allows up to eight devices to be independently controlled on the same SPI bus.
- Standby and reset modes for power management and fault detection.
- High accuracy with ±4 LSB INL and ±0.75 LSB DNL.
- Compact 24-lead LFCSP (4mm x 4mm x 0.75mm) package.
Applications
- Tunable laser control: Drives tunable laser front mirror, back mirror, phase, gain, and amplification sections.
- Automatic test equipment: High output current and precision make it suitable for various test and measurement applications.
- General high-current applications: Where precise current control is required.
Q & A
- What is the maximum full-scale output current of the ADN8810?
The maximum full-scale output current is up to 300 mA.
- How is the full-scale output current set on the ADN8810?
The full-scale output current is set using two external sense resistors.
- What is the output compliance voltage of the ADN8810?
The output compliance voltage is 2.5 V, even at output currents up to 300 mA.
- What interface does the ADN8810 use for control?
The ADN8810 uses a 3-wire SPI interface for control by a host CPU or microcontroller.
- How many devices can be controlled independently on the same SPI bus?
Up to eight devices can be independently controlled on the same SPI bus using the 3-bit address.
- What are the key accuracy specifications of the ADN8810?
The ADN8810 is guaranteed with ±4 LSB INL and ±0.75 LSB DNL.
- What is the package type of the ADN8810?
The ADN8810 is packaged in a 24-lead LFCSP (4mm x 4mm x 0.75mm).
- What are the primary applications of the ADN8810?
The primary applications include tunable laser control and automatic test equipment.
- How does the ADN8810 manage power in standby and reset modes?
In standby mode, the device is deactivated and the output goes into a high impedance state, drawing 1.3 mA of typical supply current. In reset mode, the data register is set to all zeros, bringing the output current to 0 A.
- What is the clock frequency of the SPI interface on the ADN8810?
The clock frequency of the SPI interface is up to 12.5 MHz.
