Dual-Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors
AD5547/AD5557
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
R1A
Dual channel
16-bit resolution: AD5547
14-bit resolution: AD5557
2- or 4-quadrant, 6.8 MHz BW multiplying DAC
±1 LSB DNL
±1 LSB INL
Operating supply voltage: 2.7 V to 5.5 V
Low noise: 12 nV/√Hz
Low 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 ± 20%, with VREF = 10 V
Extended automotive operating temperature range
−40°C to +125°C
Selectable zero-scale/midscale power-on presets
Compact 38-lead TSSOP package
RCOMA
VREFA
ROFSA
RFBA
VDD
D0 TO D15
(AD5547)
D0 TO D13
(AD5557)
INPUT
REGISTER
RS
DAC A
REGISTER
RS
INPUT
REGISTER
RS
D0..D15
OR
D0..D13
DAC B
REGISTER
RS
DAC A
IOUTA
AGNDA
AGNDB
WR
ADDR
DECODE
RS MSB
IOUTB
RFBB
ROFSB
POWER
ON
RESET
DGND
A0, A1
DAC B
AD5547/AD5557
LDAC
R1B
RCOMB
VREFB
04452-013
DAC A
DAC B
Figure 1.
GENERAL DESCRIPTION
The AD5547/AD5557 are dual precision, 16-/14-bit, multiplying,
low power, current-output, parallel input, digital-to-analog
converters (DACs). They are designed to operate from single
+5 V supply with ±10 V multiplying references for 4-quadrant
outputs with 6.8 MHz bandwidth.
APPLICATIONS
The built-in, 4-quadrant resistors facilitate resistance matching
and temperature tracking, which minimize the number of
components needed for multiquadrant applications. In addition,
the feedback resistor (RFB) simplifies the I-to-V conversion with
an external buffer.
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation
The AD5547/AD5557 are available in a compact, 38-lead TSSOP
package and operate at the extended automotive temperature
range of −40°C to +125°C.
VREF
U1
–VREF
C1
R1
16/14 DATA
VREFA
RCOMA
ROFSA
ROFS
R2
AD5547/AD5557
16-/14-BIT
DAC A
RFBA
RFB
C2
IOUTA
VOUTA
AGNDA
POWER-ON
RESET
WR LDAC RS
WR
LDAC
RS
MSB
A0, A1
U2
–VREF TO +VREF
MSB A0, A1
2
(ONE CHANNEL SHOWN ONLY)
04452-002
R1A
Figure 2. 16-/14-Bit 4-Quadrant Multiplying DAC with Minimum of External Components (Only One Channel Is Shown)
Rev. D
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