DAC8760: DAC 8760 interface with ESP 32

Part Number: DAC8760

Tool/software:

Hello everyone,

I've been trying to Interface DAC8760 to an ESP 32 for testing out the DAC in order to implement in our circuit.

I used the following connections-

MOSI(GPIO23) - DIN 

MISO(GPIO19) - SD0 

SCLK(GPIO18) - SCLK

CS (GPIO05) - LATCH

I supplied +24v to AVDD pin and -24v to ground, both ground pins of esp and dac were connected. 
I tried using the following code 

#include <SPI.h>

#define MOSI_PIN 23   // GPIO23 for MOSI
#define SCLK_PIN 18   // GPIO18 for SCLK
#define CS_PIN   5    // GPIO5 for CS (Chip Select)
#define MISO_PIN 19   // GPIO19 for MISO

// DAC8760 register addresses
#define DAC_WRITE_CR     0x02  // Control Register address
#define DAC_READ_STATUS  0x05  // Status Register address

// Initialize SPI and DAC
void setup() {
  Serial.begin(9600);
  
  // Set up SPI pins
  SPI.begin(SCLK_PIN, MISO_PIN, MOSI_PIN, CS_PIN);
  
  // Initialize DAC8760
  pinMode(CS_PIN, OUTPUT);
  digitalWrite(CS_PIN, HIGH);
  
  // Send initialization commands to DAC8760
  dac8760Init();
}

void loop() {
  // Read status register to check initialization status
  uint8_t status = readDACStatus();
  Serial.print("DAC Status: ");
  Serial.println(status, HEX);
  
  delay(1000); // Check status every 1 second
}

// Function to initialize the DAC8760
void dac8760Init() {
  // Write to Control Register (Configure DAC for current output 4-20 mA)
  // Data to write: Bit 15 (DAC Enable) = 1, Bit 13-11 (Output Range) = 100 for 4-20 mA
  digitalWrite(CS_PIN, LOW);    // Select DAC
  SPI.transfer(DAC_WRITE_CR);   // Send command to write to Control Register
  SPI.transfer(0xA0);           // High byte: 0xA0 (DAC Enable, 4-20mA output range)
  SPI.transfer(0x00);           // Low byte: 0x00 (No additional configurations in low byte)
  digitalWrite(CS_PIN, HIGH);   // Deselect DAC

  // Optionally, you could write again for different configurations (e.g., for voltage output)
  // This example configures for 4-20mA current output
}

// Function to read DAC status register
uint8_t readDACStatus() {
  uint8_t status;

  digitalWrite(CS_PIN, LOW);    // Select DAC
  SPI.transfer(DAC_READ_STATUS | 0x80); // Send command to read status register (with MSB = 1 for read)
  status = SPI.transfer(0x00);  // Receive status byte
  digitalWrite(CS_PIN, HIGH);   // Deselect DAC
  
  return status;
}

 
i was not able to receive both 4-20 mA output and voltage output. i also checked the internal reference voltage which turned out to be a stable 5v. Is there anything i am missing?

Thank you in advance.

Regards,

Abisheik