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Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors
AD5546/AD5556
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
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: I
DD
= 10 A
0.5 s settling time
Built-in R
FB
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 V
REF
= 10 V
Automotive operating temperature: 40C to +125C
Compact TSSOP-28 package
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation
FUNCTIONAL BLOCK DIAGRAM
DAC
AD5546/
AD5556
WR
LDAC
MSB
RS
DB0DB15
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 (R
FB
) simpli-
fies the I-V conversion with an external buffer. The AD5546/
AD5556 are packaged in compact TSSOP-28 packages with
operating temperatures from 40C to +125C.
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
RCOM
R1
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
AD5546/AD5556
Rev. 0 | Page 2 of 16
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Pin Configurations and Functional Descriptions ........................ 6
Typical Performance Characteristics ............................................. 8
Circuit Operation ........................................................................... 11
D/A Converter Section .............................................................. 11
Digital Section............................................................................. 12
ESD Protection Circuits............................................................. 12
Amplifier Selection..................................................................... 12
Reference Selection .................................................................... 12
Applications..................................................................................... 13
Unipolar Mode ........................................................................... 13
Bipolar Mode .............................................................................. 14
AC Reference Signal Attenuator............................................... 15
System Calibration ..................................................................... 15
Outline Dimensions ....................................................................... 16
Ordering Guide .......................................................................... 16
REVISION HISTORY
Revision 0: Initial Version
AD5546/AD5556
Rev. 0 | Page 3 of 16
SPECIFICATIONS
Table 1. Electrical Characteristics. V
DD
= 2.7 V to 5.5 V, I
OUT
= virtual GND, GND = 0 V, V
REF
= 10 V to 10 V, T
A
= full operating
temperature range, unless otherwise noted.
Parameter Symbol
Conditions
Min
Typ
Max
Unit
STATIC PERFORMANCE
1
Resolution N
AD5546, 1 LSB = V
REF
/2
16
= 153 V at
V
REF
= 10 V
16
Bits
Resolution N
AD5556, 1 LSB = V
REF
/2
14
= 610 V at
V
REF
= 10 V
14
Bits
Relative Accuracy
INL
Grade: AD5556C
1
LSB
Relative Accuracy
INL
Grade: AD5546B
2
LSB
Differential Nonlinearity
DNL
Monotonic
1
LSB
Output Leakage Current
I
OUT
Data = zero scale, T
A
= 25C
10
nA
Output Leakage Current
I
OUT
Data = zero scale, T
A
= T
A
maximum
20
nA
Full-Scale Gain Error
G
FSE
Data = full scale
1
4
mV
Bipolar Mode Gain Error
G
E
Data = full scale
1
4
mV
Bipolar Mode Zero-Scale
Error
G
ZSE
Data = full scale
1
2.5
mV
Full-Scale Tempco
2
TCV
FS
1
ppm/C
REFERENCE INPUT
V
REF
Range
V
REF
18
+18
V
REF Input Resistance
REF
4
5
6
k
R1 and R2 Resistance
R1 and R2
4
5
6
k
R1-to-R2 Mismatch
(R1 to R2)
0.5
1.5
Feedback and Offset
Resistance
R
FB
, R
OFS
8 10 12 k
Input Capacitance
2
C
REF
5
pF
ANALOG OUTPUT
Output Current
I
OUT
Data = full scale
2
mA
Output Capacitance
2
C
OUT
Code dependent
200
pF
LOGIC INPUT AND OUTPUT
Logic Input Low Voltage
V
IL
V
DD
= 5 V
0.8
V
Logic Input Low Voltage
V
IL
V
DD
= 3 V
0.4
V
Logic Input High Voltage
V
IH
V
DD
= 5 V
2.4
V
Logic Input High Voltage
V
IH
V
DD
= 3 V
2.1
V
Input Leakage Current
I
IL
10
A
Input Capacitance
2
C
IL
10
pF
INTERFACE TIMING
2
, 3
Data to WR Setup Time
t
DS
V
DD
= 5 V
20
ns
V
DD
= 3 V
35
ns
Data to WR Hold Time
t
DH
V
DD
= 5 V
0
ns
V
DD
= 3 V
0
ns
WR Pulse Width
t
WR
V
DD
= 5 V
20
ns
V
DD
= 3 V
35
ns
LDAC Pulse Width
t
LDAC
V
DD
= 5 V
20
ns
V
DD
= 3 V
35
ns
RS Pulse Width
t
RS
V
DD
= 5 V
20
ns
V
DD
= 3 V
35
ns
WR to LDAC Delay Time
t
LWD
V
DD
= 5 V
0
ns
V
DD
= 3 V
0
ns
AD5546/AD5556
Rev. 0 | Page 4 of 16
Parameter Symbol
Condition
Min
Typ
Max
Unit
SUPPLY CHARACTERISTICS
Power Supply Range
V
DD RANGE
2.7
5.5
V
Positive Supply Current
I
DD
Logic inputs = 0 V
10
A
Power Dissipation
P
DISS
Logic inputs = 0 V
0.055
mW
Power Supply Sensitivity
P
SS
V
DD
= 5%
0.003
%/%
AC CHARACTERISTICS
4
Output Voltage Settling
Time
t
S
To 0.1% of full scale, data cycles from zero scale to full scale
to zero scale
0.5
s
Reference Multiplying BW
BW
V
REF
= 5 V p-p, data = full scale
4
MHz
DAC Glitch Impulse
Q
V
REF
= 0 V, midscale to midscale minus 1
7
nV-s
Multiplying Feedthrough
Error
V
OUT
/V
REF
V
REF
= 100 mV rms, f = 10 kHz
65
dB
Digital Feedthrough
Q
D
WR = 1, LDAC toggles at 1MHz
7
nV-s
Total Harmonic Distortion
THD
V
REF
= 5 V p-p, data = full-scale, f = 1 KHz
85
dB
Output Noise Density
e
N
f = 1 kHz, BW = 1 Hz
12
nV/rt
Hz
1
All static performance tests (except I
OUT
) are performed in a closed-loop system, using an external precision OP97 I-V converter amplifier. The AD554x RFB terminal is
tied to the amplifier output. The op amp +IN is grounded and the DAC I
OUT
is tied to the op amp IN. Typical values represent average readings measured at 25C.
2
These parameters are guaranteed by design and not subject to production testing.
3
All input control signals are specified with t
R
= t
F
= 2.5 ns (10% to 90% of 3 V), and timed from a voltage level of 1.5 V.
4
All ac characteristic tests are performed in a closed-loop system using an AD841 I-V converter amplifier.
AD5546/AD5556
Rev. 0 | Page 5 of 16
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
V
DD
to GND
0.3 V, +8 V
R
FB
, R
OFS
, R
1
, R
COM
, and REF to GND
18 V, 18 V
Logic Inputs to GND
0.3 V, +8 V
V(I
OUT
) to GND
0.3 V, V
DD
+ 0.3 V
Input Current to Any Pin except Supplies
50 mA
Thermal Resistance (
JA
) 128C
Maximum Junction Temperature (T
J
MAX
) 150C
Operating Temperature Range
40C to +125C
Storage Temperature Range
65C to +150C
Lead Temperature:
Vapor Phase, 60 s
215C
Infrared, 15 s
220C
Package Power Dissipation
(T
J MAX
T
A
)/
JA
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Document Outline
- FEATURES
- APPLICATIONS
- FUNCTIONAL BLOCK DIAGRAM
- GENERAL DESCRIPTION
-
-
-
-
-
-
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