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LTC2672 Datasheet(PDF) 20 Page - Analog Devices

Part # LTC2672
Description  Five-Channel, Low Dropout, 300 mA, Current Source Output, 12-/16-Bit SoftSpan DAC
PDF  27 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC2672 Datasheet(HTML) 20 Page - Analog Devices

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Data Sheet
LTC2672
THEORY OF OPERATION
analog.com
Rev. B | 20 of 27
and that the TGB bit in the global toggle register is also high. Use
the toggle select command to set the toggle select bits as needed
to select the input register (Register A or Register B) with which
each channel is to be updated. Then, update all channels either
by using the serial command (1001b) or by applying a negative
pulse to the LDAC pin. Any channels that have toggle select bits
that are 0 update from Register A, and channels that have toggle
select bits that are 1 update from Register B (see Figure 30). By
alternating between toggle select and update operations, up to five
channels can be simultaneously switched to Register A or Register
B as needed.
TOGGLE SELECT
1
0
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
T3
T4
T2
T1
T0
MSB
LSB
1
TOGGLE SELECT BITS
(1-BIT/CHANNEL)
DON’T CARE
Figure 28. Toggle Select Syntax
GLOBAL TOGGLE
COMMAND
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
TGB
1
GLOBAL
TOGGLE
BIT
DON’T CARE
Figure 29. Global Toggle Syntax
Figure 30. Conceptual Block Diagram, Toggle Functionality



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