Below is the parameter table and instructions for the AD558KN, a monolithic 8-bit D/A converter with a serial interface from Analog Devices.

AD558KN Parameter Table

AD558KN Instructions

1. Pin Configuration

• Vcc: Positive supply voltage (4.5V to 5.5V)
• GND: Ground
• Vref: Reference voltage input
• CS: Chip select (active low)
• SCLK: Serial clock input
• SDATA: Serial data input
• LDAC: Load DAC (active low)
• Vout: Analog output

2. Serial Interface Operation

1. Chip Select (CS): Bring CS low to enable the device.
2. Serial Data (SDATA): Send 8-bit data serially on the SDATA line.
3. Serial Clock (SCLK): Toggle SCLK to shift in each bit of data. The data is sampled on the rising edge of SCLK.
4. Load DAC (LDAC): After all 8 bits are shifted in, bring LDAC low to latch the data into the DAC register and update the analog output.

3. Data Format

• The data format is MSB-first (most significant bit first).
• Example: To send the value 10010110 (binary), the sequence would be:
  • 1 (MSB)
  • 0
  • 0
  • 1
  • 0
  • 1
  • 1
  • 0 (LSB)

4. Powering the Device

• Connect Vcc to a stable 5V supply.
• Connect GND to the ground of your system.
• Connect Vref to a stable reference voltage (typically 5V for full-scale output).

5. Output Considerations

• The output voltage (Vout) will range from 0V to Vref based on the digital input.
• Ensure that the load impedance is appropriate for the output stage to avoid loading issues.

6. Temperature and Environmental Considerations

• Operate the device within the specified temperature range to ensure reliable performance.
• Store the device within the storage temperature range to prevent damage.

7. Example Code (Pseudocode)

// Initialize pins
CS = HIGH
SCLK = LOW
SDATA = LOW
LDAC = HIGH

// Start conversion
CS = LOW

// Send 8-bit data
for i = 7 to 0:
    if (data & (1 << i)):
        SDATA = HIGH
    else:
        SDATA = LOW
    SCLK = HIGH
    SCLK = LOW

// Latch data into DAC
LDAC = LOW
LDAC = HIGH

// End conversion
CS = HIGH

This table and set of instructions should provide you with the necessary information to use the AD558KN effectively.