AD5439 Analog Devices, AD5439 Datasheet - Page 7

• Manufacturer Part Number: AD5439
• Description: (AD5424 - AD5547) High Bandwidth Multiplying DACs
• Manufacturer: Analog Devices

Pin No.
18
19
20
21
22
23
29
Table 4. AD5557 Pin Function Descriptions
Pin No.
1, 2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24–28,
30–38
29
Mnemonic
NC
R
R
R
R
V
I
AGNDA
DGND
AGNDB
I
V
R
R
R
R
WR
A0
A1
LDAC
MSB
RS
D13 to D0
VDD
OUTA
OUTB
OFSA
FBA
1A
COMA
COMB
1B
FBB
OFSB
REFA
REFB
Mnemonic
WR
A0
A1
LDAC
MSB
RS
VDD
Function
No Connection. Do not connect anything other than dummy pads to these pins.
Bipolar Offset Resistor A. Accepts up to ±18 V. In 2-quadrant mode, R
to R
Internal Matching Feedback Resistor A. Connects to the external op amp for I-V conversion.
4-Quandrant Resistor. In 2-quadrant mode, R
connect when operating in unipolar mode.
Center Tap Point of the Two 4-Quadrant Resistors, R
of the reference amplifier. In 2-quadrant mode, R
unipolar mode.
DAC A Reference Input in 2-Quadrant Mode, R2 Terminal in 4-Quadrant Mode. In 2-quadrant mode, V
reference input with constant input resistance versus code. In 4-quadrant mode, V
reference amplifier.
DAC A Current Output. Connects to the inverting terminal of external precision I-V op amp for voltage output.
DAC A Analog Ground.
Digital Ground.
DAC B Analog Ground.
DAC B Current Output. Connects to inverting terminal of external precision I-V op amp for voltage output.
DAC B Reference Input Pin. Establishes DAC full-scale voltage. Constant input resistance versus code. If configured
with an external op amp for 4-quadrant multiplying, V
Center Tap Point of the Two 4-Quadrant Resistors, R
of the reference amplifier. In 2-quadrant mode, R
unipolar mode.
4-Quandrant Resistor. In 2-quadrant mode, R
connect if operating in unipolar mode.
Internal Matching Feedback Resistor B. Connects to external op amp for I-V conversion.
Bipolar Offset Resistor B. Accepts up to ±18 V. In 2-quadrant mode, R
to R
Write Control Digital Input In, Active Low. Transfers shift register data to the DAC register on the rising edge. Signal
level must be ≤ V
Address Pin 0. Signal level must be ≤ V
Address Pin 1. Signal level must be ≤ V
Digital Input Load DAC Control. Signal level must be ≤ V
Power-On Reset State. MSB = 0 corresponds to zero-scale reset; MSB = 1 corresponds to midscale reset. The signal
level must be ≤ V
Active low resets both input and DAC registers. Resets to zero-scale if MSB = 0, and to midscale if MSB = 1. Signal
level must be ≤ V
Digital Input Data Bits D13 to D0. Signal level must be ≤ V
Positive Power Supply Input. The specified range of operation is 2.7 V to 5.5 V.
Function
Write Control Digital Input In, Active Low. WR transfers shift register data to the DAC register on the rising edge.
Signal level must be ≤ V
Address Pin 0. Signal level must be ≤ V
Address Pin 1. Signal level must be ≤ V
Digital Input Load DAC Control. Signal level must be ≤ V
Power-On Reset State. MSB = 0 corresponds to zero-scale reset; MSB = 1 corresponds to midscale reset. The
signal level must be ≤ V
Active low resets both input and DAC registers. Resets to zero-scale if MSB = 0, and to midscale if MSB = 1. Signal
level must be ≤ V
Positive Power Supply Input. The specified range of operation is 2.7 V to 5.5 V.
1A
1B
and the external reference.
and an external reference.
DD
DD
DD
DD
+ 0.3 V.
+ 0.3 V.
+ 0.3 V.
+ 0.3 V.
DD
DD
+ 0.3 V.
+ 0.3 V.
Rev. 0 | Page 7 of 20
DD
DD
DD
DD
+ 0.3 V.
+ 0.3 V.
+ 0.3 V.
+ 0.3 V.
1A
1B
shorts to the V
shorts to the V
COMA
COMB
1A
1B
shorts to the VREF pin. Do not connect if operating in
shorts to the VREF pin. Do not connect if operating in
and R
and R
REFB
DD
DD
becomes –V
DD
+ 0.3 V.
2B
2A
+ 0.3 V.
+ 0.3 V.
. In 4-quadrant mode, R
. In 4-quadrant mode, R
REFB
REFA
pin. In 4-quadrant mode, R
pin. In 4-quadrant mode, R
OFSB
OFSA
REF
.
ties to R
ties to R
FBB
FBA
REFA
. In 4-quadrant mode, R
. In 4-quadrant mode, R
COMB
COMA
is driven by the external
ties to the inverting node
ties to the inverting node
AD5547/AD5557
1B
1A
ties to R
ties to R
REFA
OFSB
OFSA
is the
. Do not
. Do not
OFSB
OFSA
ties
ties