19-1571; Rev 0; 12/99
Low-Cost, +5V, Serial-Input,
Voltage-Output, 14-Bit DAC
General Description
The MAX5544 serial-input, voltage-output, 14-bit
monotonic digital-to-analog converter (DAC) operates
from a single +5V supply. The DAC output is
unbuffered, resulting in low 0.3mA supply current and
low 1LSB offset error. The DAC output range is 0V to
V
REF
. The DAC latch accepts a 16-bit serial word. A
power-on reset circuit clears the DAC output to 0V
(unipolar mode) when power is initially applied.
The 10MHz 3-wire serial interface is SPI™/QSPI™/
MICROWIRE™ compatible and interfaces directly with
optocouplers for applications requiring isolation. The
MAX5544 is available in an 8-pin SO package.
o
+5V Single-Supply Operation
o
Low Power: 1.5mW
o
1µs Settling Time
o
Unbuffered Voltage Output Directly Drives 60kΩ
Loads
o
SPI/QSPI/MICROWIRE-Compatible Serial Interface
o
Power-On Reset Circuit Clears DAC Output to 0V
(unipolar mode)
o
Schmitt Trigger Inputs for Direct Optocoupler
Interface
Features
o
Full 14-Bit Performance Without Adjustments
MAX5544
Applications
High-Resolution Offset and Gain Adjustment
Industrial Process Control
Automated Test Equipment
Data Acquisition Systems
PART
MAX5544CSA
MAX5544ESA
Ordering Information
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 SO
8 SO
Pin Configuration
TOP VIEW
Functional Diagram
V
DD
MAX5544
REF
OUT 1
AGND 2
REF 3
CS 4
8 V
DD
14-BIT DAC
OUT
AGND
CS
DIN
SCLK
16-BIT DATA LATCH
CONTROL
LOGIC
SERIAL INPUT REGISTER
MAX5544
7 DGND
6 DIN
5 SCLK
SO
DGND
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Low-Cost, +5V, Serial-Input,
Voltage-Output, 14-Bit DAC
MAX5544
ABSOLUTE MAXIMUM RATINGS
V
DD
to DGND............................................................-0.3V to +6V
CS,
SCLK, DIN to DGND..........................................-0.3V to +6V
REF to AGND...............................................-0.3V to (V
DD
+0.3V)
AGND to DGND.....................................................-0.3V to +0.3V
OUT to AGND, DGND.................................. ............-0.3V to V
DD
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
Operating Temperature Ranges
MAX5544CSA .....................................................0°C to +70°C
MAX5544ESA ..................................................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
DD
= +5V ±5%, V
REF
= +2.5V, V
AGND
= V
DGND
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Resolution
Differential Nonlinearity
Integral Nonlinearity
Zero-Code Offset Error
Zero-Code Tempco
Gain Error (Note 1)
Gain-Error Tempco
DAC Output Resistance
Power-Supply Rejection
REFERENCE INPUT
Reference Input Range
Reference Input Resistance
(Note 4)
Voltage-Output Slew Rate
Output Settling Time
V
REF
R
REF
(Note 3)
2.0
11.5
3.0
V
kΩ
R
OUT
PSR
(Note 2)
4.75V
≤
V
DD
≤
5.25V
SYMBOL
N
DNL
INL
ZSE
ZS
TC
Guaranteed monotonic
V
DD
= 5V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
±0.1
6.25
±1.0
±0.05
±5
±10
CONDITIONS
MIN
14
±0.5
±4
±1.0
±8
±1
±2
TYP
MAX
UNITS
Bits
LSB
LSB
LSB
ppm/°C
LSB
ppm/°C
kΩ
LSB
STATIC PERFORMANCE—ANALOG SECTION
(R
L
=
∞)
DYNAMIC PERFORMANCE—ANALOG SECTION
(R
L
=
∞)
SR
C
L
= 10pF (Note 5)
To ±
1
/
2
LSB of FS, C
L
= 10pF
25
1
V/µs
µs
2
_______________________________________________________________________________________
Low-Cost, +5V, Serial-Input,
Voltage-Output, 14-Bit DAC
MAX5544
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V ±5%, V
REF
= +2.5V, V
AGND
= V
DGND
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DAC Glitch Impulse
Digital Feedthrough
Major-carry transition
Code = 0000 hex,
CS
= V
DD
,
SCLK = V
DIN
= 0 to V
DD
levels
BW
SNR
C
IN
Code = 0000 hex
Code = FFFC hex
2.4
0.8
V
IN
= 0
(Note 6)
0.40
4.75
0.3
1.5
5.25
1.1
±1
10
Code = FFFC hex
Code = 0000 hex, V
REF
= 1Vp-p at 100kHz
10
10
nVs
nVs
DYNAMIC PERFORMANCE—REFERENCE SECTION
Reference -3dB Bandwidth
Reference Feedthrough
Signal-to-Noise Ratio
Reference Input Capacitance
1
1
83
75
120
MHz
mVp-p
dB
pF
STATIC PERFORMANCE—DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Current
Input Capacitance
Hysteresis Voltage
POWER SUPPLY
Positive Supply Range
Positive Supply Current
Power Dissipation
V
DD
I
DD
PD
V
mA
mW
V
IH
V
IL
I
IN
C
IN
V
H
V
V
µA
pF
V
TIMING CHARACTERISTICS
(V
DD
= +5V ±5%, V
REF
= +2.5V, V
AGND
= V
DGND
= 0, CMOS inputs, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SCLK Frequency
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Low to SCLK High Setup
CS
High to SCLK High Setup
SCLK High to
CS
Low Hold
SCLK High to
CS
High Hold
DIN to SCLK High Setup
DIN to SCLK High Hold
V
DD
High to
CS
Low
(power-up delay)
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
SYMBOL
f
CLK
t
CH
t
CL
t
CSS0
t
CSS1
t
CSH0
t
CSH1
t
DS
t
DH
(Note 6)
45
45
45
45
30
45
40
0
20
CONDITIONS
MIN
TYP
MAX
10
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
ns
µs
Gain error tested at V
REF
= +2.0V, +2.5V, and +3.0V.
R
OUT
tolerance is typically ±20%.
Min/max ranges guaranteed by gain-error test. Operation outside min/max limits will result in degraded performance.
Reference input resistance is code dependent, minimum at 8554 hex.
Slew-rate value is measured from 0% to 63%.
Guaranteed by design. Not production tested.
_______________________________________________________________________________________
3
Low-Cost, +5V, Serial-Input,
Voltage-Output, 14-Bit DAC
MAX5544
Typical Operating Characteristics
(V
DD
= +5V, V
REF
= +2.5V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. TEMPERATURE
MAX5544-01
SUPPLY CURRENT
vs. REFERENCE VOLTAGE
0.34
0.33
SUPPLY CURRENT (mA)
0.32
0.31
0.30
0.29
0.28
0.27
0.26
MAX5544-02
ZERO-CODE OFFSET ERROR
vs. TEMPERATURE
0.15
ZERO-CODE OFFSET ERROR (LSB)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
MAX5544-03
0.50
0.45
SUPPLY CURRENT (mA)
0.40
0.35
0.30
0.25
0.20
-40
-20
0
20
40
60
80
0.35
0.20
0.25
100
0
1
2
3
4
5
6
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
-60
-20
20
60
100
140
TEMPERATURE (°C)
INTEGRAL NONLINEARITY
vs. TEMPERATURE
MAX5544-04
DIFFERENTIAL NONLINEARITY
vs. TEMPERATURE
MAX5544-05
GAIN ERROR
vs. TEMPERATURE
0.15
0.10
MAX5544-06
0.30
0.20
0.10
INL (LSB)
0
-0.10
-0.20
-0.30
-60
-20
20
60
100
-INL
0.30
0.20
0.20
+INL
DNL (LSB)
+DNL
GAIN ERROR (LSB)
140
0.10
0
0.05
0
-0.05
-0.10
-DNL
-0.10
-0.20
-0.30
-0.15
-0.20
-60
-20
20
60
100
-60
-20
20
60
100
140
TEMPERATURE (°C)
TEMPERATURE (°C)
140
TEMPERATURE (°C)
INTEGRAL NONLINEARITY
vs. CODE
MAX5544-07
DIFFERENTIAL NONLINEARITY
vs. CODE
MAX5544-08
REFERENCE CURRENT
vs. CODE
MAX5544-09
0.250
0.250
200
REFERENCE CURRENT (µA)
0.125
INL (LSB)
0.125
160
0
DNL (LSB)
120
0
80
-0.125
-0.125
40
-0.250
0
5k
10k
DAC CODE
15k
20k
-0.250
0
5k
10k
DAC CODE
15k
20k
0
0
4k
8k
12k
16k
20k
DAC CODE
4
_______________________________________________________________________________________
Low-Cost, +5V, Serial-Input,
Voltage-Output, 14-Bit DAC
Typical Operating Characteristics (continued)
(V
DD
= +5V, V
REF
= +2.5V, T
A
= +25°C, unless otherwise noted.)
FULL-SCALE STEP RESPONSE
(f
SCLK
= 10MHz)
MAX5544-10
MAX5544
FULL-SCALE STEP RESPONSE
(f
SCLK
= 20MHz)
MAX5544-11
OUT
500mV/div
OUT
500mV/div
1µs/div
C
L
= 13pF
R
L
=
∞
C
L
= 13pF
R
L
=
∞
400ns/div
MAJOR-CARRY OUTPUT GLITCH
MAX5544-12
DIGITAL FEEDTHROUGH
MAX5544-13
CS
5V/div
SCLK
5V/div
OUT
AC-COUPLED
100mV/div
2µs/div
2µs/div
OUT
AC-COUPLED
50mV/div
CODE = 0000 hex
______________________________________________________________Pin Description
PIN
1
2
3
4
5
6
7
8
NAME
OUT
AGND
REF
CS
SCLK
DIN
DGND
V
DD
DAC Output Voltage
Analog Ground
Voltage Reference Input. Connect to external +2.5V reference.
Chip-Select Input
Serial-Clock Input. Duty cycle must be between 40% and 60%.
Serial-Data Input
Digital Ground
+5V Supply Voltage
FUNCTION
_______________________________________________________________________________________
5
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