AD5547 Analog Devices, AD5547 Datasheet - Page 15

• Manufacturer Part Number: AD5547
• Description: Dual Current Output, Parallel Input, 16-Bit Multiplying DACs with 4-Quadrant Resistors
• Manufacturer: Analog Devices

Specifications of AD5547

• Resolution (bits): 16bit
• Dac Update Rate: 2MSPS
• Dac Settling Time: 500ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

Data Sheet
2-Quadrant Multiplying Mode, V
The
positive or negative reference voltages. As a result, a positive
output can be achieved with an additional op amp, (see
Figure 22); the output becomes
AD5547/AD5557
V
V
OUT
OUT
= +V
= +V
+5V
1µF
REF
REF
C1
× D/65,536 (AD5547)
× D/16,384 (AD5557)
are designed to operate with either
16/14 DATA
1µF
C2
A0, A1
LDAC
0.1µF
MSB
4
WR
RS
C3
V
GND
IN
2
TRIM
V
ADR03
OUT
OUT
U3
VDD
WR
= 0 V to +V
5
6
Figure 22. Unipolar 2-Quadrant Multiplying Mode, V
AD5547/AD5557
LDAC
+2.5V
R
R1
1A
RS
R
AD8628
U2A
COMA
MSB A0, A1
REF
C7
R2
V
REFA
2
Rev. C | Page 15 of 20
(3)
(4)
–2.5V
R
16-/14-BIT
ROFS
OFSA
Table 8 shows the positive output vs. code for the AD5547.
Table 8.
D in Binary
1111 1111 1111 1111
1000 0000 0000 0000
0000 0000 0000 0001
0000 0000 0000 0000
R
RFB
FBA
AGNDA
AD5547
I
OUT
OUTA
= 0 to +V
C6
Unipolar Mode Positive Output vs. Code
REF
U2B
AD8628
+5V
+V
–V
V
+V
+V
+V
0
C4
C5
OUT
REF
REF
REF
0.1µF
(V)
(65,535/65,536)
/2
(1/65,536)
1µF
0V TO +2.5V
AD5547/AD5557
V
OUTA