AD7328BRUZ Analog Devices Inc, AD7328BRUZ Datasheet - Page 26

• Manufacturer Part Number: AD7328BRUZ
• Description: IC ADC 12BIT+ SAR 8CHAN 20TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD7328BRUZ

• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Design Resources: Using AD7328 in Appls with Single-Ended Industrial-Level Signals (CN0047)
• Number Of Bits: 12
• Sampling Rate (per Second): 1M
• Number Of Converters: 1
• Power Dissipation (max): 30mW
• Voltage Supply Source: Dual ±
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Resolution (bits): 13bit
• Sampling Rate: 1MSPS
• Input Channel Type: Pseudo Differential, Single Ended
• Supply Current: 900µA
• Digital Ic Case Style: TSSOP
• No. Of Pins: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7328CBZ - BOARD EVALUATION FOR AD7328
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

AD7328
If a write to one of the range registers is required during a se-
quence, it is necessary to first stop the sequence by writing to
the control register and setting SEQ1 to 0 and SEQ2 to 0. Next,
write to the range register to change the required range. The
previously selected sequence should then be initiated again by
writing to the control register and setting SEQ1 to 0 and SEQ2
to 1. The ADC converts the first channel in the sequence.
The AD7328 can be configured to convert a sequence of con-
secutive channels (see Figure 45). This sequence begins by
converting on Channel 0 and ends with a final channel as selected
by Bit ADD2 to Bit ADD0 in the control register. In this config-
uration, there is no need for a write to the sequence register. To
operate the AD7328 in this mode, set SEQ1 to 1 and SEQ2 to 0
CS
CS
CS
CS
CS
DIN: WRITE TO RANGE REGISTER 1 TO SELECT THE RANGE
DIN: WRITE TO RANGE REGISTER 2 TO SELECT THE RANGE
DIN: WRITE TO CONTROL REGISTER TO SELECT THE FINAL
CHANNEL IN THE CONSECUTIVE SEQUENCE, SET SEQ1 = 1
AND SEQ2 = 0. SELECT OUTPUT CODING FOR SEQUENCE.
DIN: WRITE BIT = 0 OR DIN LINE HELD LOW TO CONTINUE
DIN: WRITE BIT = 0 OR DIN LINE HELD LOW TO CONTINUE
CS
DOUT: CONVERSION RESULT FROM CHANNEL 0, ± 10V
THROUGH SEQUENCE OF CONSECUTIVE CHANNELS.
DOUT: CONVERSION RESULT FROM CHANNEL 0,
DOUT: CONVERSION RESULT FROM CHANNEL 0,
DOUT: CONVERSION RESULT FROM CHANNEL 0,
DOUT: CONVERSION RESULT FROM CHANNEL 1,
TO CONVERT THROUGH THE SEQUENCE OF
RANGE SELECTED IN RANGE REGISTER 1,
RANGE SELECTED IN RANGE REGISTER 1,
RANGE SELECTED IN RANGE REGISTER 1.
RANGE SELECTED IN RANGE REGISTER 1.
Figure 45. Flowchart for Consecutive Sequence of Channels
FOR ANALOG INPUT CHANNELS.
FOR ANALOG INPUT CHANNELS.
SEQUENCE, SEQ1 = 0, SEQ2 = 0.
FROM CHANNEL IN SEQUENCE.
RANGE, SINGLE-ENDED MODE.
DOUT: CONVERSION RESULT
CONSECUTIVE CHANNELS.
DIN: WRITE TO CONTROL
REGISTER TO STOP THE
SINGLE-ENDED MODE.
SINGLE-ENDED MODE.
A SEQUENCE.
POWER ON.
STOPPING
Rev. B | Page 26 of 36
in the control register, and then select the final channel in the
sequence by programming Bit ADD2 to Bit ADD0 in the control
register.
After the control register is configured to operate the AD7328
in this mode, the DIN line can be held low or the write bit can
be set to 0. To return to traditional multichannel operation, a
write to the control register to set SEQ1 to 0 and SEQ2 to 0 is
necessary.
When SEQ1 and SEQ2 are both set to 0 or to 1, the AD7328 is
configured to operate in traditional multichannel mode, where
a write to Channel Address Bit ADD2 to Bit ADD0 in the
control register selects the next channel for conversion.
ON CONSECUTIVE SEQUENCE
CONTINUOUSLY CONVERT
OF CHANNELS.
DIN TIED LOW/WRITE BIT = 0.