Overview
The AD5545BRUZ-REEL7, manufactured by Analog Devices Inc., is a dual, current-output, serial-input digital-to-analog converter (DAC) available in 16-bit and 14-bit resolutions. This component operates from a 4.5 V to 5.5 V supply range and requires an external reference voltage to establish the full-scale output current. The AD5545/AD5555 series features a high-speed, 3-wire serial data interface compatible with microcontrollers, using serial data in (SDI), clock (CLK), and chip select (CS) inputs. The device also includes an additional LDAC function for simultaneous update operations and internal reset logic for power-on preset and dynamic reset at either zero or midscale.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Resolution | N | - | 16 Bits (AD5545), 14 Bits (AD5555) | - | - | - |
| Relative Accuracy (INL) | INL | - | ±2 LSB (AD5545B), ±1 LSB (AD5555C) | - | - | LSB |
| Differential Nonlinearity (DNL) | DNL | - | Monotonic ±1 LSB | - | - | LSB |
| Full-Scale Current | IOUT | VREF = 10 V | - | 2 mA | ±20% | mA |
| Settling Time | tS | To ±0.1% full scale | - | 0.5 µs | - | µs |
| Supply Voltage Range | VDD | - | 4.5 V | - | 5.5 V | V |
| Operating Temperature Range | TA | - | -40°C | - | 85°C | °C |
| Package Type | - | - | - | - | - | 16-TSSOP |
Key Features
- High-speed, 3-wire serial data interface compatible with microcontrollers using SDI, CLK, and CS inputs.
- Internal feedback resistor (RFB) for use with an external I-to-V converter amplifier.
- Simultaneous update operation via LDAC function.
- Power-on preset and dynamic reset at either zero or midscale.
- Compact 16-lead TSSOP package.
- Operates with either negative or positive reference voltages.
- R-2R ladder DAC architecture.
Applications
- Automatic test equipment.
- Instrumentation.
- Digitally controlled calibration.
- Industrial control and PLCs.
- Programmable attenuators.
Q & A
- What is the resolution of the AD5545 and AD5555 DACs?
The AD5545 has a 16-bit resolution, while the AD5555 has a 14-bit resolution.
- What is the full-scale current output of the AD5545/AD5555?
The full-scale current output is 2 mA with a ±20% tolerance when VREF = 10 V.
- What is the settling time of the AD5545/AD5555?
The settling time is 0.5 µs to ±0.1% full scale.
- What is the operating temperature range of the AD5545/AD5555?
The operating temperature range is -40°C to 85°C.
- What type of package does the AD5545/AD5555 come in?
The device is packaged in a compact 16-lead TSSOP package).
- What kind of data interface does the AD5545/AD5555 use?
The device uses a high-speed, 3-wire serial data interface compatible with microcontrollers).
- Does the AD5545/AD5555 require an external reference voltage?
Yes, an external reference voltage is required to establish the full-scale output current).
- What are some common applications of the AD5545/AD5555?
Common applications include automatic test equipment, instrumentation, digitally controlled calibration, industrial control, and programmable attenuators).
- How does the internal reset logic work?
The internal reset logic allows for power-on preset and dynamic reset at either zero or midscale, depending on the state of the MSB pin).
- Is the AD5545/AD5555 RoHS compliant?
Yes, the AD5545/AD5555 is RoHS compliant).
