Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors

AD5546/AD5556


Rev. 0
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FEATURES
16-bit resolution
14-bit resolution
2- or 4-quadrant multiplying DAC
±1 LSB DNL
±1 LSB INL or ±2 LSB INL
Operating supply voltage: 2.7 V to 5.5 V
Low noise: 12 nV/√Hz
Low power: IDD = 10 µA
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
Automotive operating temperature: –40°C to +125°C
Compact TSSOP-28 package

APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation

FUNCTIONAL BLOCK DIAGRAM
DACAD5546/
AD5556
WR
LDAC
MSB RS
DB0–DB15
CONTROL
LOGIC DAC
REGISTER
POR
16/14
V
DD
R
1
R
2
R
OFS
R
FB
R
1
R
COM
REF R
OFS
R
FB
I
OUT
GND
03810-0-001

Figure 1. AD5546/AD5556 Simplified Block Diagram

GENERAL DESCRIPTION
The AD5546/AD5556 are precision 16-/14-bit, multiplying, low
power, current output, parallel input D/A converters. They
operate from a single 2.7 V to 5.5 V supply with ±10 V multi-
plying references for 4-quadrant outputs. Built-in 4-quadrant
resistors facilitate the resistance matching and temperature
tracking that minimize the number of components needed for
multiquadrant applications. The feedback resistor (RFB) simpli-
fies the I-V conversion with an external buffer. The AD5546/
AD5556 are packaged in compact TSSOP-28 packages with
operating temperatures from –40°C to +125°C.
16/14-BIT
2
5V
6
5
4
GND
VIN
TRIM
U3
ADR03
VOUT
5V VDD
R1 ROFS
ROF
–VREF TO +VREF
VOUT
RFB
RFB
C2
GND
U1
AD5546/AD5556
IOUT
R2
U2A
OP2177
+
–
C1
–VREF +VREF
RCOMR1
16/14 DATA
REF
U2B
OP2177
–
+
WR
WR
LDAC
LDAC
RS
RS
MSB
MSB
03810-0-002

Figure 2. 16-/14-Bit, 4-Quadrant Multiplying DAC with a Minimum of External Components