EVAL-AD7991EBZ Analog Devices Inc, EVAL-AD7991EBZ Datasheet - Page 23

• Manufacturer Part Number: EVAL-AD7991EBZ
• Description: BOARD EVAL FOR AD7991
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7991EBZ

• Number Of Adc's: 1
• Number Of Bits: 12
• Sampling Rate (per Second): 1M
• Data Interface: Serial
• Inputs Per Adc: 4 Single Ended
• Input Range: 0 ~ Vdd
• Power (typ) @ Conditions: 4.4mW @ 5.5 V, 3.4MHz
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: AD7991
• Silicon Manufacturer: Analog Devices
• Application Sub Type: ADC
• Kit Application Type: Data Converter
• Silicon Core Number: AD7991
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WRITING TO THE AD7991/AD7995/AD7999
By default, each part operates in read-only mode and all four chan-
nels are selected as enabled in the configuration register. To write
to the AD7991/AD7995/AD7999 configuration register, the user
must first address the device.
SCL
SDA
START BY
MASTER
0
1
1
SERIAL BUS ADDRESS BYTE
0
Figure 24. Writing to the AD7991/AD7995/AD7999 Configuration Register
1
FRAME 1
0
0
A0
Rev. B | Page 23 of 28
R/W
ACK BY
ADC
9
D7
1
The configuration register is an 8-bit register; therefore, only
one byte of data can be written to this register. However, writing
a single byte of data to this register consists of writing the serial
bus write address, followed by the data byte written (see Figure 24).
D6
CONFIGURATION REGISTER BYTE
D5
D4
D3
D2
AD7991/AD7995/AD7999
D1
D0
ACK BY
ADC
9
STOP