Question about CN0359 (ADC, signal line connection)

Hi Justin,

1. Pin 40 is the GPIO used to for A0 value of the AD8253 gain selection. Pin 38 is used as PWMSYNC. The PWMSYNC works as a reset for all PWM counters whenever a transition occurs on the pin. Here is a snippet of the line of code in pwm_open() function in pwm.cpp. This configures the pin for PWMSYNC function

Here is a snip of the ADuCM360 Hardware User Guide for the PWM synchronization feature:

2. For the ADC, I'll recommend the AD7124-8 which is also a 24-Bit Sigma-Delta ADC (AD7124-8 Datasheet and Product Info | Analog Devices). It has been used in several projects and also in a water conductivity/TDS measurement board (CN0411 Circuit Note | Analog Devices)

Best Regards,

Nikko

Hi Justin,

1. Pin 40 is the GPIO used to for A0 value of the AD8253 gain selection. Pin 38 is used as PWMSYNC. The PWMSYNC works as a reset for all PWM counters whenever a transition occurs on the pin. Here is a snippet of the line of code in pwm_open() function in pwm.cpp. This configures the pin for PWMSYNC function

Here is a snip of the ADuCM360 Hardware User Guide for the PWM synchronization feature:

2. For the ADC, I'll recommend the AD7124-8 which is also a 24-Bit Sigma-Delta ADC (AD7124-8 Datasheet and Product Info | Analog Devices). It has been used in several projects and also in a water conductivity/TDS measurement board (CN0411 Circuit Note | Analog Devices)

Best Regards,

Nikko

Since you edited the question to specify an ADC with an I2C interface, I'd recommend the LTC2495 (16-bit 8-channel Sigma Delta ADC) which has its own evaluation board with QuikEval (https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/dc1012a-c.html)

The CN0358 requires 4 channels. Can anyone recommend an ADC with 4 channels with equivalent performance to the AD7124-8?

thank you.