MICROCHIP MCP48FVB24-E/MQ

The MCP48FXBX4/8 devices are a family of buffered voltage output Digital-to-Analog Converters (DAC), with the following options:

• Quad or octal output channel configurations
• 8/10/12-bit resolution
• Volatile or nonvolatile user memory

The quad and octal options differ only by the number of output channels. The volatile and nonvolatile versions have an identical analog circuit structure.

There are three voltage reference sources: the external VREF pin, the device’s VDD or an internal band gap voltage source.

When the VDD mode is selected, it is internally connected to the DAC’s reference circuit. When the external VREF pin is used, the user has the option to select between a gain of 1 and 2 if the Buffered mode is used, or the internal buffer can be bypassed entirely in the External VREF Unbuffered mode.

In the Internal Band Gap Voltage Reference mode, the gain can be selected between 2 and 4.

This family of devices features WiperLock functionality, which prevents inadvertent changes of the output value. It uses a high voltage on a specific pin, together with dedicated commands, to lock the values that are stored in memory.

These devices have an SPI compatible serial interface. WRITE commands are supported up to 20 MHz, while READ commands are supported up to 10 MHz.

• Operating Voltage Range: - 2.7V to 5.5V – Full specifications - 1.8V to 2.7V – Reduced device specifications
• Output Voltage Resolutions: - 8-bit: MCP48FXB0X (256 steps) - 10-bit: MCP48FXB1X (1024 steps) - 12-bit: MCP48FXB2X (4096 steps)
• Rail-to-Rail Output
• Fast Settling Time of 7.8 µs (Typical)
• DAC Voltage Reference Source Options: - Device VDD - External VREF pin (buffered or unbuffered) - Internal band gap (1.22V typical)
• Output Gain Options: - 1x (unity) - 2x (available when not using internal VDD as voltage source)
• Nonvolatile Memory (EEPROM) Option: - User-programmable Power-on Reset (POR)/Brown-out Reset (BOR) output setting and device Configuration bits recall - Auto-recall of saved DAC register setting - Auto-recall of saved device configuration (voltage reference, gain, power-down)
• Power-on/Brown-out Reset Protection
• Power-Down Modes: - Disconnects output buffer (high-impedance) - Selection of V0UT pull-down resistors (125 kΩ or kΩ)
• Low-Power Consumption: - Normal operation: <2.6 mA (quad), 3.2 mA (octal) - Power-down operation: 680 nA typical - EEPROM write cycle: 2.2 mA (quad), 2.7 mA (octal) maximum
• SPI Interface: - Supports Mode 0,0 and Mode 1,1 - Up to 20 MHz writes and 10 MHz reads - Input buffers support interfacing to low-voltage digital devices
• Package Types: 20-Lead TSSOP, 20-Lead 5 mm x 5 mm VQFN
• Extended Temperature Range: -40°C to +125°C

• Set Point or Offset Trimming
• Sensor Calibration
• Low-Power Portable Instrumentation
• PC Peripherals
• Data Acquisition Systems
• Motor Control