AD5533BBC-1_ Ver la hoja de datos (PDF) - Analog Devices
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AD5533BBC-1_ Datasheet PDF : 16 Pages
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AD5532B
CONTROLLER
VIN
DAC
BUSY
TRACK
ACQUISITION
CIRCUIT
OUTPUT
STAGE
PIN
DRIVER
VOUT1
AD5532B
THRESHOLD
VOLTAGE
ONLY ONE CHANNEL SHOWN FOR SIMPLICITY
Figure 9. Typical ATE Circuit Using TRACK Input
DEVICE
UNDER
TEST
of the pin driver, the comparator output switches. The µC/µP
then knows what code is required to be input in order to obtain
the desired voltage at the DUT. The TRACK input is now
brought high and the part begins to acquire VIN. At this stage,
BUSY goes low until VIN has been acquired. The output buffer
is then switched from VIN to the output of the DAC.
MODES OF OPERATION
The AD5532B can be used in four different modes of oper-
ation. These modes are set by two mode bits, the first two bits in
the serial word.
Mode Bit 1
0
0
1
1
Table II. Modes of Operation
Mode Bit 2
0
1
0
1
Operating Mode
ISHA Mode
DAC Mode
Acquire and Readback
Readback
1. ISHA Mode
In this mode, a channel is addressed and that channel
acquires the voltage on VIN. This mode requires a 10-bit
write (see Figure 3) to address the relevant channel (VOUT0–
VOUT31, offset channel or all channels). MSB is written first.
MSB
LSB
0
0
CAL
OFFSET SEL
0
A4 –A0
MODE BIT 1 MODE BIT 2
TEST BIT
MODE BITS
a. 10-Bit Input Serial Write Word (ISHA Mode)
MSB
LSB
0
1
CAL
OFFSET SEL
0
A4 –A0
DB13–DB0
MODE BITS
TEST BIT
b. 24-Bit Input Serial Write Word (DAC Mode)
MSB
LSB
MSB
LSB
1
0
CAL
OFFSET SEL
0
A4 –A0
DB1 3 –DB0
MODE BITS
10-BIT
SERIAL WORD
WRITTEN TO PART
TEST BIT
14-BIT DATA
READ FROM PART AFTER
NEXT FALLING EDGE OF SYNC
(DB13 = MSB OF DAC WORD)
c. Input Serial Interface (Acquire and Readback Mode)
MSB
1
1
MODE BITS
LSB
MSB
LSB
CAL
OFFSET SEL
0
A4 –A0
DB1 3 –DB0
10-BIT
SERIAL WORD
WRITTEN TO PART
TEST BIT
14-BIT DATA
READ FROM PART AFTER
NEXT FALLING EDGE OF SYNC
(DB13 = MSB OF DAC WORD)
d. Input Serial Interface (Readback Mode)
Figure 10. Serial Interface Formats
–12–
REV. A
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