AD5557CRU Analog Devices Inc, AD5557CRU Datasheet - Page 15

• Manufacturer Part Number: AD5557CRU
• Description: IC,D/A CONVERTER,DUAL,14-BIT,TSSOP,38PIN
• Manufacturer: Analog Devices Inc

Specifications of AD5557CRU

• Design Resources: Precision, Unipolar, Inverting Conversion Using AD5547/57 DAC (CN0026) Precision, Unipolar, Noninverting Configuration for the AD5547/57 DAC (CN0027) Precision, Bipolar, Configuration for AD5547/AD5557 DAC (CN0028)
• Settling Time: 500ns
• Number Of Bits: 14
• Data Interface: Parallel
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 55µW
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2-Quadrant Multiplying Mode, V
The AD5547/AD5557 are designed to operate with either
positive or negative reference voltages. As a result, a positive
output can be achieved with an additional op amp, (see
Figure 21); the output becomes
V
V
OUT
OUT
= +V
= +V
+5V
1µF
REF
REF
C1
× D/65,536 (AD5547)
× D/16,384 (AD5557)
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 21. 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. B | 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. AD5547 Unipolar Mode Positive Output vs. Code
D in Binary
1111 1111 1111 1111
1000 0000 0000 0000
0000 0000 0000 0001
0000 0000 0000 0000
R
RFB
FBA
AGNDA
I
OUT
OUTA
= 0 to +V
C6
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