Overview
The AD7835ASZ-REEL, produced by Analog Devices Inc., is a quad 14-bit Digital-to-Analog Converter (DAC) integrated circuit. This device features four 14-bit DACs on a single monolithic chip, providing high precision and versatility for various applications. The AD7835 is distinguished by its parallel or double-byte loading capabilities, making it suitable for systems requiring multiple analog output channels.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of DACs | 4 | - |
| Resolution | 14-bit | - |
| Output Voltage Range | ±8.192 V | V |
| Maximum Output Voltage Span | 14 V | V |
| Loading Method | Parallel or Double-Byte | - |
| Package Type | 44-lead MQFP, 44-lead PLCC | - |
| Power Supply | VCC = 5 V ± 5%, VDD = 12 V ± 5%, VSS = -12 V ± 5% | V |
| Current Consumption | IDD: 15 mA max (outputs unloaded) | mA |
| Operating Temperature Range | -40°C to +85°C | °C |
Key Features
- Four 14-bit DACs in a single package, providing multiple analog output channels.
- Parallel or double-byte loading capabilities for flexible data input.
- Voltage outputs with a range of ±8.192 V and a maximum span of 14 V.
- Power-on reset function to ensure stable output voltages during power-up.
- Clear function to set all output voltages to a user-defined level via the CLR input and DSG pin.
- Common voltage reference inputs for precise voltage control.
- Surface-mount packages (44-lead MQFP and 44-lead PLCC) for compact design.
Applications
- Process control systems requiring precise analog output signals.
- Automatic test equipment where multiple DAC channels are necessary.
- General-purpose instrumentation for various industrial and scientific applications.
Q & A
- What is the resolution of the AD7835 DAC?
The AD7835 has a resolution of 14 bits.
- What are the output voltage ranges of the AD7835?
The output voltage range is ±8.192 V with a maximum span of 14 V.
- How does the AD7835 load data?
The AD7835 can load data through either 14-bit parallel loading or double-byte loading.
- What are the package options for the AD7835?
The AD7835 is available in 44-lead MQFP and 44-lead PLCC packages.
- What is the power-on reset function of the AD7835?
The power-on reset function ensures that the DAC output voltages are held within ±2 V of the DSG potential until the power supplies stabilize.
- How can the output voltages be cleared to a user-defined level?
The output voltages can be cleared to a user-defined level using the CLR input and the DSG pin.
- What are the typical applications of the AD7835?
The AD7835 is typically used in process control, automatic test equipment, and general-purpose instrumentation.
- What is the operating temperature range of the AD7835?
The operating temperature range is -40°C to +85°C.
- How much current does the AD7835 typically consume?
The AD7835 typically consumes up to 15 mA when the outputs are unloaded.
- Can multiple AD7835 devices be addressed individually in a multipackage application?
No, the AD7835 does not have dedicated package address pins like the AD7834. However, it can be used in multiple device configurations based on other control signals.
