Overview
The AD5555CRU is a dual, current-output, serial-input, 14-bit digital-to-analog converter (DAC) produced by Analog Devices, Inc. This device is designed to operate from a 4.5 V to 5.5 V supply range and features a compact 16-lead TSSOP package. The AD5555CRU requires an external reference to establish the full-scale output current and includes an internal feedback resistor (RFB) for use with an external I-to-V converter amplifier. The device supports a high-speed 3-wire serial data interface compatible with microcontrollers, using serial data in (SDI), clock (CLK), and chip select (CS) inputs. It also includes an 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 | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | - | - | - | 14 bits | - |
| DNL (Differential Nonlinearity) | - | - | - | ±1 LSB | - |
| INL (Integral Nonlinearity) | - | - | - | ±1 LSB | - |
| Full-Scale Current | VREF = 10 V | - | - | 2 mA ± 20% | - |
| Settling Time | To ±0.1% full scale | - | 0.5 µs | - | - |
| Supply Voltage Range | - | 4.5 V | 5 V | 5.5 V | V |
| Operating Temperature Range | - | -40°C | - | 85°C | °C |
| Package Type | - | - | - | 16-lead TSSOP | - |
Key Features
- High-speed 3-wire serial data interface compatible with microcontrollers.
- Internal feedback resistor (RFB) for use with an external I-to-V converter amplifier.
- LDAC function for simultaneous update operations.
- Internal reset logic for power-on preset and dynamic reset at either zero or midscale.
- Compact 16-lead TSSOP package.
- Operates from a 4.5 V to 5.5 V supply range.
- Supports 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 AD5555CRU?
The AD5555CRU has a resolution of 14 bits.
- What is the full-scale current of the AD5555CRU?
The full-scale current is 2 mA ± 20% with VREF = 10 V.
- What is the settling time of the AD5555CRU?
The settling time is 0.5 µs to ±0.1% full scale.
- What is the operating temperature range of the AD5555CRU?
The operating temperature range is from -40°C to 85°C.
- What type of package does the AD5555CRU come in?
The AD5555CRU comes in a 16-lead TSSOP package.
- Does the AD5555CRU support both negative and positive reference voltages?
Yes, the AD5555CRU supports both negative and positive reference voltages.
- What is the purpose of the LDAC function in the AD5555CRU?
The LDAC function allows for simultaneous update operations of the DACs.
- How does the internal reset logic work in the AD5555CRU?
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.
- What is the architecture of the DAC in the AD5555CRU?
The DAC architecture uses a current-steering R-2R ladder design.
- What are some common applications of the AD5555CRU?
Common applications include automatic test equipment, instrumentation, digitally controlled calibration, industrial control, and programmable attenuators.
