AD5382BST-3 Analog Devices Inc, AD5382BST-3 Datasheet - Page 23
![no-image](/images/manufacturer_photos/0/0/57/analog_devices_inc_sml.jpg)
AD5382BST-3
Manufacturer Part Number
AD5382BST-3
Description
IC DAC 14BIT 32CH 3V 100-LQFP
Manufacturer
Analog Devices Inc
Datasheet
1.AD5382BSTZ-5.pdf
(40 pages)
Specifications of AD5382BST-3
Design Resources
32 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5382 (CN0011) AD5382 Channel Monitor Function (CN0012)
Settling Time
8µs
Number Of Bits
14
Data Interface
Serial, Parallel
Number Of Converters
32
Voltage Supply Source
Single Supply
Power Dissipation (max)
65mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
100-LQFP
For Use With
EVAL-AD5382EB - BOARD EVAL FOR AD5382
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Table 16. Control Register Contents
MSB
CR13
Control Register Write/Read
REG1 = REG0 = 0, A4–A0 = 01100, R/ W status determines
if the operation is a write (R/ W = 0) or a read (R/ W = 1).
DB13 to DB0 contain the control register data.
Control Register Contents
CR13: Power-Down Status. This bit is used to configure the
output amplifier state in power-down.
CR12: REF Select. This bit selects the operating internal
reference for the AD5382.
CR11: Current Boost Control. This bit is used to boost the
current in the output amplifier, thereby altering its slew rate.
CR10: Internal/External Reference. This bit determines
if the DAC uses its internal reference or an externally
applied reference.
CR9: Channel Monitor Enable (see Channel Monitor Function)
CR13 = 1. Amplifier output is high impedance (default on
power-up).
CR13 = 0. Amplifier output is 100 kΩ to ground.
CR12 = 1: Internal reference is 2.5 V (AD5382-5 default), the
recommended operating reference for AD5382-5.
CR12 = 0: Internal reference is 1.25 V (AD5382-3 default),
the recommended operating reference for AD5382-3.
CR11 = 1: Boost Mode On. This maximizes the bias current
in the output amplifier, optimizing its slew rate but increasing
the power dissipation.
CR11 = 0: Boost Mode Off (default on power-up). This
reduces the bias current in the output amplifier and reduces
the overall power consumption.
CR10 = 1: Internal Reference Enabled. The reference output
depends on data loaded to CR12.
CR10 = 0: External Reference Selected (default on power-up).
CR9 = 1: Monitor Enabled. This enables the channel monitor
function. After a write to the monitor channel in the SFR
register, the selected channel output is routed to the
MON_OUT pin.
CR9 = 0: Monitor Disabled (default on power-up). When the
monitor is disabled, MON_OUT is three-stated.
CR12
CR11
CR10
CR9
CR8
Rev. B | Page 23 of 40
CR7
CR8: Thermal Monitor Function. This function is used to
monitor the AD5382’s internal die temperature when enabled.
The thermal monitor powers down the output amplifiers when
the temperature exceeds 130°C. This function can be used to
protect the device when power dissipation may be exceeded if a
number of output channels are simultaneously short-circuited.
A soft power-up re-enables the output amplifiers if the die
temperature drops below 130°C.
CR7 and CR6: Don’t Care.
CR5 to CR2: Toggle Function Enable. This function allows the
user to toggle the output between two codes loaded to the A
and B register for each DAC. Control Register Bits CR5 to CR2
are used to enable individual groups of eight channels for
operation in toggle mode. A Logic 1 written to any bit enables a
group of channels; a Logic 0 disables a group. LDAC is used to
toggle between the two registers.
for toggle contains Channels 24 to 31, CR5 = 1 enables these
channels.
Table 17.
CR Bit
CR5
CR4
CR3
CR2
CR1 and CR0: Don’t Care.
Channel Monitor Function
REG1 = REG0 = 0, A4–A0 = 01010
DB13–DB8 = Contain data to address the monitored channel
A channel monitor function is provided on the AD5382.
This feature, which consists of a multiplexer addressed via the
interface, allows any channel output or the signals connected
to the MON_IN inputs to be routed to the MON_OUT pin for
monitoring using an external ADC. The channel monitor func-
tion must be enabled in the control register before any channels
are routed to MON_OUT. On the AD5382, DB13 to DB8
contain the channel address for the monitored channel.
Selecting channel address 63 three-states MON_OUT.
CR6
CR8 = 1: Thermal Monitor Enabled.
CR8 = 0: Thermal Monitor Disabled (default on power-up).
CR5
CR4
Group
3
2
1
0
CR3
Table 17
CR2
shows the decoding
Channels
24–31
16–23
8–15
0–7
CR1
AD5382
LSB
CR0