AD5546 Datasheet, PDF (1/16 Pages) Analog Devices – Current Output, Parallel Input, 16-/14-Bit Multiplying DACs with 4-Quadrant Resistors

Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors
AD5546/AD5556
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
5V
2
VIN
U3
ADR03
5
TRIM
6
VOUT
GND
4
5V
+
U2A
OP2177
–
C1 _–VREF
R1
RCOM
REF
R1
R2
VDD
16/14 DATA
U1
AD5546/AD5556
FUNCTIONAL BLOCK DIAGRAM
R₁ R_COM REF R_OFS
R₁
R₂
R_OFS R_FB
R_FB
V_DD
WR
LDAC
DB0–DB15
AD5546/
AD5556
CONTROL
LOGIC
DAC
16/14
DAC
REGISTER
I_OUT
GND
POR
MSB RS
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.
+VREF
ROF
RFB
ROFS RFB
16/14-BIT
IOUT
GND
C2
–
U2B
OP2177
VOUT
+
–VREF TO +VREF
WR LDAC RS MSB
WR
LDAC
RS
MSB
Figure 2. 16-/14-Bit, 4-Quadrant Multiplying DAC with a Minimum of External Components
Rev. 0
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