Dual Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors
AD5547/AD5557
FEATURES
Dual channel
FUNCTIONAꢀ BꢀOCK DIAGRAM
R
R
V
R
1A
COMA
REFA
OFSA
16-bit resolution: AD5547
14-bit resolution: AD5557
2- or 4-quadrant, 4 MHz BW multiplying DAC
1 ꢀSB DNꢀ
1 ꢀSB INꢀ
Operating supply voltage: 2.7 V to 5.5 V
ꢀow noise: 12 nV/√Hz
ꢀow power: IDD = 10 μA max
0.5 μs settling time
Built-in RFB facilitates current-to-voltage conversion
Built-in 4-quadrant resistors allow 0 V to –10 V, 0 V to +10 V,
or 10 V outputs
2 mA full-scale current 20ꢁ, with VREF = 10 V
Extended automotive operating temperature range:
–40°C to +125°C
R
FBA
V
DD
DAC A
REGISTER
RS
D0..D15
OR
D0..D13
INPUT
REGISTER
I
DAC A
DAC B
D0–D15
(AD5547)
D0–D13
OUTA
RS
AGNDA
(AD5557)
AGNDB
DAC B
REGISTER
RS
INPUT
REGISTER
I
OUTB
RS
DAC A
DAC B
WR
R
FBB
R
OFSB
POWER
ON
RESET
A0, A1
ADDR
DECODE
AD5547/AD5557
DGND
RS MSB
LDAC
R
R
V
REFB
1B
COMB
Figure 1.
Selectable zero-scale/midscale power-on presets
Compact TSSOP-38 package
APPꢀICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation
The built-in 4-quadrant resistors facilitate resistance matching
and temperature tracking, which minimize the numbers of
components needed for multiquadrant applications. In
addition, the feedback resistor (RFB) simplifies the I-V
conversion with an external buffer.
GENERAꢀ DESCRIPTION
The AD5547/AD5557 are dual precision, 16-/14-bit,
multiplying, low power, current-output, parallel input, digital-
to-analog converters. They are designed to operate from single
+5 V supply with 1ꢀ V multiplying references for 4-quadrant
outputs with up to 4 MHz bandwidth.
The AD5547/AD5557 are available in a compact TSSOP-38
package and operate at the extended automotive temperature
range of –4ꢀ°C to +125°C.
VREF
U1
–VREF
C1
R
R
V
R
R
FBA
1A
COMA
REFA
OFSA
C2
ROFS RFB
R1
R2
U2
IOUTA
VOUTA
16-/14-BIT
DAC A
AD5547/AD5557
16/14 DATA
AGNDA
–VREF TO +VREF
POWER-ON
RESET
WR LDAC RS
MSB A0, A1
(ONE CHANNEL SHOWN ONLY)
WR
LDAC
RS
MSB
A0, A1
2
Figure 2. 16-/14-Bit 4-Quadrant Multiplying DAC with Minimum of External Components (Only One Channel Shown)
Rev. A
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