AD5553 Analog Devices, AD5553 Datasheet - Page 6

• Manufacturer Part Number: AD5553
• Manufacturer: Analog Devices

Specifications of AD5553

• Resolution (bits): 14bit
• Dac Update Rate: 1.2MSPS
• Dac Settling Time: 500ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Ser,SPI

AD5543/AD5553
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
Table 4. Control-Logic Truth Table
CLK
X
↑+
X
X
1
↑+ = positive logic transition; X = don't care.
1
1
1
CS
H
L
H
↑+
Mnemonic
CLK
SDI
R
V
I
GND
V
CS
OUT
FB
REF
DD
1
Serial Shift Register Function
No effect
Shift register data advanced one bit
No effect
Shift register data transferred to DAC register
Description
Clock Input. Positive-edge triggered, clocks data into shift register.
Serial Register Input. Data loads directly into the shift register MSB first. Extra leading bits are ignored.
Internal Matching Feedback Resistor. This pin connects to an external op amp for voltage output.
DAC Reference Input Pin. Establishes DAC full-scale voltage. Constant input resistance vs. code.
DAC Current Output. This pin connects to the inverting terminal of the external precision I-to-V op amp for
voltage output.
Analog and Digital Ground.
Positive Power Supply Input. Specified range of operation at 5 V ± 10%.
Chip Select. Active low digital input. Transfers shift-register data to DAC register on rising edge.
See Table 4 for operation.
V
CLK
R
SDI
REF
FB
Figure 6. Pin Configuration
1
2
3
4
Rev. F | Page 6 of 20
(Not to Scale)
AD5543/
AD5553
TOP VIEW
8
7
6
5
CS
V
GND
I
OUT
DD
DAC Register
Latched
Latched
Latched
New data loaded from serial register
Data Sheet