Evaluating AD7616 on SDP-K1 ¶

The AD7616 is a 16-bit, DAS that supports dual simultaneous sampling of 16 channels. The AD7616 operates from a single 5 V supply and can accommodate ±10 V, ±5 V, and ±2.5 V true bipolar input signals while sampling at throughput rates up to 1 MSPS per channel pair with 90.5 dB SNR. Higher SNR performance can be achieved with the on-chip oversampling mode (92 dB for an oversampling ratio (OSR) of 2).

The input clamp protection circuitry can tolerate voltages up to ±21 V. The AD7616 has 1 MÙ analog input impedance, regardless of sampling frequency. The single-supply operation, on-chip filtering, and high input impedance eliminate the need for driver op amps and external bipolar supplies.

The device contains analog input clamp protection, a dual, 16-bit charge redistribution SAR analog-to-digital converter (ADC), a flexible digital filter, a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces.

Applications ¶

Power line monitoring
Protective relays
Multiphase motor control
Instrumentation and control systems
Data acquisition systems (DASs)

Hardware Specifications ¶

Power Supply Requirements ¶

Make sure to power both EVAL-AD7616 and SDP-K1 via the barrel jack connector.

EVAL-AD7616 Jumpers setup ¶

Jumper/Solder link	Position	Description
SL1	Unmounted	Channel Sequencer Enable
SL2	Unmounted	RC Enable input
SL3	Unmounted	Selects 1 MISO mode
SL4	Unmounted	Oversampling Ratio Selection OS2
SL5	Mounted	If mounted, selects serial interface
SL6	Unmounted	Oversampling Ratio Selection OS1
SL7	Unmounted	Oversampling Ratio Selection OS0
LK40	A	Onboard 5V0 power supply selected
LK41	A	Onboard 3V3 power supply selected

No-OS Build Setup ¶

Please see: https://wiki.analog.com/resources/no-os/build

No-OS Supported Examples ¶

IIO example ¶

This project is actually a IIOD demo for EVAL-AD7616 device. The project launches a IIOD server on the board so that the user may connect to it via an IIO client. Using IIO-Oscilloscope, the user can configure the ADC and view the measured data on a plot.

If you are not familiar with ADI IIO Application, please take a look at: IIO No-OS

If you are not familiar with ADI IIO-Oscilloscope Client, please take a look at: IIO Oscilloscope

The No-OS IIO Application together with the No-OS IIO AD7616 driver take care of all the back-end logic needed to setup the IIO server.

The read buffer is used for storing the burst data which shall be retrieved by any LibIIO client.

No-OS Supported Platforms ¶

STM32 Platform ¶

Used hardware:

EVAL-AD7616 with
SDP-K1 and
ST debugger

Fly-wire connections

EVAL-AD7616	SDP-K1 Arduino header
SCLK	D13
DB10/SDI	D11
DB12/SDOA	D12
CS	D10
CONVST	D5
RESET	D7
BUSY	D6

Build Command

# to delete current build
make reset
# to build the project
make
# to flash the code
make run
# to debug the code
make debug