AD5554BRS Analog Devices Inc, AD5554BRS Datasheet - Page 14

• Manufacturer Part Number: AD5554BRS
• Description: IC DAC 14BIT QUAD SERIAL 28-SSOP
• Manufacturer: Analog Devices Inc

Specifications of AD5554BRS

• Rohs Status: RoHS non-compliant
• Settling Time: 2µs
• Number Of Bits: 14
• Data Interface: Serial
• Number Of Converters: 4
• Voltage Supply Source: Dual ±
• Power Dissipation (max): 1.25mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP

AD5544/AD5554
POWER-ON RESET
When the V
forces all the input and DAC registers to the zero-code state or
half-scale state, depending on the MSB pin voltage. The V
supply should have a smooth positive ramp without drooping to
have consistent results, especially in the region of V
2.3 V. The V
ance. The DAC register data stays at a zero-scale or half-scale
setting until a valid serial register data load takes place.
SDO
CLK
SDI
CS
Figure 22. AD5544/AD5554 Equivalent Logic Interface
DD
SS
SDO
CLK
SDI
CS
supply has no effect on the power-on reset perform-
power supply is turned on, an internal reset strobe
EN
D10
D11
D12
D13
D14
D15
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
A0
A1
EN
DECODE
DGND
16
DAC A
2:4
B
C
D
SHIFT REGISTER
TO INPUT REGISTER
DECODER
ADDRESS
POWER-
RESET
ON
19
TH
CLOCK
/17
DD
Figure 21. System Level Digital Interfacing
TH
= 1.5 V to
A
B
C
D
DD
power
Rev. D | Page 14 of 16
REGISTER R
REGISTER R
REGISTER R
REGISTER R
MSB
MSB
SET
INPUT
INPUT
INPUT
INPUT
ESD Protection Circuits
All logic input pins contain back-biased ESD protection Zener
diodes that are connected to ground (DGND) and V
shown in Figure 23.
Power Supply Sequence
As standard practice, it is recommended that V
be powered up prior to any reference. The ideal power-up sequence
is as follows: A
A noncompliance power-up sequence may elevate the reference
current, but the devices resume normal operation once V
V
AD5544
SS
are powered up.
LDAC
REGISTER R
REGISTER R
REGISTER R
REGISTER R
MSB
SET
DAC A
DAC B
DAC C
DAC D
Figure 23. Equivalent ESD Production Circuits
GND
x, DGND, V
DIGITAL
INPUTS
V
RS
DD
V
REF
A B C D
5kΩ
DD
DAC A
DAC B
DAC C
DAC D
DGND
, V
V
SS
SS
, V
REF
x, and the digital inputs.
V
R
I
A
R
I
A
R
I
A
R
I
A
A
OUT
OUT
OUT
OUT
DD
DD
FB
GND
FB
GND
FB
GND
FB
GND
GND
, V
A
B
C
D
A
B
C
D
A
B
C
D
F
SS
, and ground
DD
, as
DD
and