Getting incorrect output from ADC over SPI in Arduino Uno

I am trying to read data from an ADC ADCS7476 (datasheet) using SPI on Arduino Uno. I am using the following code to read the data from the ADC and printing it on serial monitor. However, the code is always printing 0. I never used SPI before and I am not able to debug the issue, does anyone know where I am going wrong.

I am using the following connections:

1. ADC’s SCLK to Pin 13 on Ardunio
2. ADC’s SDATA to Pin 12 on Arduino
3. ADC’s CS to Pin 10 on Arduino

Code:

#include <SPI.h>
#define cs 10

SPISettings settingsA(250000, MSBFIRST, SPI_MODE0);
byte highbyte,lowbyte;
unsigned int data;

void setup() {
  Serial.begin(9600);
  pinMode(cs, OUTPUT);
  digitalWrite(cs, HIGH); 
  delay(1000);
  SPI.begin();
}

void loop() {
  SPI.beginTransaction(settingsA);
  digitalWrite(cs, LOW);
  delayMicroseconds(1);
  highbyte = SPI.transfer(0xFF);
  lowbyte = SPI.transfer(0xFF);
  digitalWrite(cs, HIGH);
  delayMicroseconds(1);
  SPI.endTransaction();
  data= ((unsigned int)highbyte << 8 ) + lowbyte;
  Serial.println(data);
  delay(100);
}