Overview
The AD7834AR is a quad 14-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This component integrates four 14-bit DACs on a single monolithic chip, offering a versatile solution for various analog output applications. The AD7834AR features serial input loading, with data transmitted via a serial bus using the DIN, SCLK, and FSYNC pins. It is designed to provide high precision and reliability, making it suitable for a range of industrial and instrumentation applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Bits | Resolution of each DAC | 14 bits |
| Number of D/A Converters | Number of DACs in the package | 4 |
| Settling Time | Typical time for output to settle | 10 µs |
| Output Type | Type of analog output | Voltage - Buffered |
| Differential Output | Presence of differential output | No |
| Data Interface | Method of data transmission | SPI |
| Reference Type | Type of voltage reference | External |
| Voltage Supply, Analog | Range of analog voltage supply | ±11.4 V to ±15.75 V |
| Voltage Supply, Digital | Voltage of digital supply | 5 V |
| INL/DNL (LSB) | Integral and differential non-linearity | ±2 (Max), ±0.9 (Max) |
| Architecture | Internal architecture of the DAC | R-2R |
| Operating Temperature | Range of operating temperatures | -40°C to 85°C |
| Package / Case | Type and size of the package | 28-SOIC (0.295", 7.50mm Width) |
Key Features
- Four 14-bit DACs in one package: Provides multiple analog output channels from a single component.
- Serial loading: Data is loaded in 16-bit format from the external serial bus using DIN, SCLK, and FSYNC pins.
- Voltage outputs: Offers output voltages in the range ±8.192 V with a maximum span of 14 V.
- Power-on reset function: Ensures DAC output voltage levels are held to within ±2 V of the DSG potential during power-on.
- User-assigned device addressing: Allows up to 32 AD7834s to be individually addressed in a multipackage application.
- Clear function to user-defined voltage: Asynchronous CLR input sets all signal outputs to the user-defined voltage level on the device sense ground pin (DSG).
- Surface-mount packages: Available in 28-lead SOIC and PDIP packages.
Applications
- Process control: Suitable for precision control in industrial processes.
- Automatic test equipment: Used in test and measurement equipment for accurate analog output generation.
- General-purpose instrumentation: Applicable in various instrumentation roles requiring multiple precise analog outputs.
Q & A
- What is the resolution of each DAC in the AD7834AR?
The AD7834AR has four 14-bit DACs. - How is data loaded into the AD7834AR?
Data is loaded in 16-bit format from the external serial bus using DIN, SCLK, and FSYNC pins. - What is the output voltage range of the AD7834AR?
The output voltage range is ±8.192 V with a maximum span of 14 V. - What is the typical settling time of the AD7834AR?
The typical settling time is 10 µs. - Can multiple AD7834AR devices be addressed individually?
Yes, up to 32 AD7834s can be individually addressed in a multipackage application. - What is the purpose of the CLR input in the AD7834AR?
The CLR input sets all signal outputs to the user-defined voltage level on the device sense ground pin (DSG). - What are the available package types for the AD7834AR?
The AD7834AR is available in 28-lead SOIC and PDIP packages. - What is the operating temperature range of the AD7834AR?
The operating temperature range is -40°C to 85°C. - Is the AD7834AR RoHS compliant?
Yes, the AD7834AR is RoHS compliant. - What type of voltage reference does the AD7834AR use?
The AD7834AR uses an external voltage reference.
