19-1082; Rev 2; 12/99
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
General Description
The MAX541/MAX542 are serial-input, voltage-output,
16-bit digital-to-analog converters (DACs) that operate
from a single +5V supply. They provide 16-bit perfor-
mance (±1LSB INL and DNL) over temperature without
any adjustments. The DAC output is unbuffered, result-
ing in a low supply current of 0.3mA and a low offset
error of 1LSB.
The DAC output range is 0V to V
REF
. For bipolar opera-
tion, matched scaling resistors are provided in the
MAX542 for use with an external precision op amp
(such as the MAX400), generating a ±V
REF
output
swing. The MAX542 also includes Kelvin-sense con-
nections for the reference and analog ground pins to
reduce layout sensitivity.
A 16-bit serial word is used to load data into the DAC
latch. The 10MHz, 3-wire serial interface is compatible
with SPI™/QSPI™/MICROWIRE™, and it also interfaces
directly with optocouplers for applications requiring isola-
tion. A power-on reset circuit clears the DAC output to 0V
(unipolar mode) when power is initially applied.
The MAX541 is available in 8-pin plastic DIP and SO
packages. The MAX542 is available in 14-pin plastic
DIP and SO packages.
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 16-Bit Performance Without Adjustments
MAX541/MAX542
Ordering Information
PART
MAX541ACPA
MAX541BCPA
MAX541CCPA
MAX541ACSA
MAX541BCSA
MAX541CCSA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
8 SO
INL
(LSB)
±1
±2
±4
±1
±2
±4
Applications
High-Resolution Offset and Gain Adjustment
Industrial Process Control
Automated Test Equipment
Data-Acquisition Systems
Ordering Information continued at end of data sheet.
Functional Diagrams
V
DD
RFB
R
FB
INV
General Description
TOP VIEW
REFF
REFS
MAX542
RFB 1
OUT 2
14 V
DD
13 INV
R
INV
16-BIT DAC
OUT
AGNDF
OUT 1
AGND 2
REF 3
CS 4
8 V
DD
AGNDF 3
AGNDS 4
REFS 5
MAX542
12 DGND
11 LDAC
10 DIN
9 N.C.
8 SCLK
MAX541
7 DGND
6 DIN
5 SCLK
REFF 6
CS 7
CS
LDAC
SCLK
DIN
16-BIT DATA LATCH
CONTROL
LOGIC
SERIAL INPUT REGISTER
DGND
AGNDS
DIP/SO
DIP/SO
Functional Diagrams continued at end of data sheet.
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.
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
MAX541/MAX542
ABSOLUTE MAXIMUM RATINGS
V
DD
to DGND ...........................................................-0.3V to +6V
CS,
SCLK, DIN,
LDAC
to DGND ..............................-0.3V to +6V
REF, REFF, REFS to AGND ........................-0.3V to (V
DD
+ 0.3V)
AGND, AGNDF, AGNDS to DGND........................-0.3V to +0.3V
OUT, INV to AGND, DGND ......................................-0.3V to V
DD
RFB to AGND, DGND..................................................-6V to +6V
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
8-Pin SO (derate 5.88mW/°C above +70°C) .................471mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) ...800mW
14-Pin SO (derate 8.33mW/°C above +70°C) ...............667mW
14-Pin Ceramic SB (derate 10.00mW/°C above +70°C ..800mW
Operating Temperature Ranges
MAX541 _C_ A/MAX542_C_D. .............................0°C to +70°C
MAX541 _E_ A/MAX542_E_D............................-40°C to +85°C
MAX542CMJD .................................................-55°C to +125°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, AGND = DGND = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
16
MAX54_A
Integral Nonlinearity
Differential Nonlinearity
Zero-Code Offset Error
Zero-Code Tempco
Gain Error (Note 1)
Gain-Error Tempco
DAC Output Resistance
Bipolar Resistor Matching
Bipolar Zero Offset Error
Bipolar Zero Tempco
Power-Supply Rejection
REFERENCE INPUT
Reference Input Range
Reference Input Resistance
(Note 4)
BZS
TC
PSR
V
REF
R
REF
R
OUT
(Note 2)
MAX542
MAX542
MAX542
4.75V
≤
V
DD
≤
5.25V
(Note 3)
Unipolar mode
MAX542, bipolar mode
2.0
11.5
9.0
25
1
R
FB
/R
INV
Ratio error
T
A
= +25°C
T
A
= T
MIN
to T
MAX
±0.5
±1.0
3.0
INL
DNL
ZSE
ZS
TC
V
DD
= 5V
Guaranteed monotonic
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
±0.015
±10
±20
%
LSB
ppm/°C
LSB
V
kΩ
±0.05
±5
±10
MAX54_B
MAX54_C
±0.5
±0.5
±0.5
±0.5
±1.0
±2.0
±4.0
±1.0
±1
±2
LSB
LSB
ppm/°C
LSB
ppm/°C
kΩ
LSB
TYP
MAX
UNITS
Bits
STATIC PERFORMANCE—ANALOG SECTION
(R
L
=
∞)
Resolution
N
DYNAMIC PERFORMANCE—ANALOG SECTION
(R
L
=
∞,
unipolar mode)
Voltage-Output Slew Rate
SR
C
L
= 10pF (Note 5)
Output Settling Time
to ±
1
/
2
LSB of FS, C
L
= 10pF
V/µs
µs
2
_______________________________________________________________________________________
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V ±5%, V
REF
= +2.5V, AGND = DGND = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
DAC Glitch Impulse
Digital Feedthrough
SYMBOL
CONDITIONS
Major-carry transition
Code = 0000 hex;
CS
= V
DD;
LDAC
= 0;
SCLK, DIN = 0 to V
DD
levels
BW
SNR
C
IN
Code = 0000 hex
Code = FFFF 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 = FFFF hex
Code = 0000 hex, V
REF
= 1Vp-p at 100kHz
MIN
TYP
10
10
MAX
UNITS
nVs
nVs
MAX541/MAX542
DYNAMIC PERFORMANCE—REFERENCE SECTION
Reference -3dB Bandwidth
Reference Feedthrough
Signal-to-Noise Ratio
Reference Input Capacitance
1
1
92
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, AGND = 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
LDAC
Pulse Width
CS
High to
LDAC
Low Setup
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
t
LDAC
t
LDACS
MAX542
MAX542 (Note 6)
(Note 6)
45
45
45
45
30
45
40
0
50
50
20
CONDITIONS
MIN
TYP
MAX
10
UNITS
MHz
ns
ns
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 range guaranteed by gain-error test. Operation outside min/max limits will result in degraded performance.
Reference input resistance is code dependent, minimum at 8555 hex.
Slew-rate value is measured from 0% to 63%.
Guaranteed by design. Not production tested.
_______________________________________________________________________________________
3
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
MAX541/MAX542
__________________________________________Typical Operating Characteristics
(V
DD
= 5V, V
REF
= +2.5V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. TEMPERATURE
MAX542-01
SUPPLY CURRENT
vs. REFERENCE VOLTAGE
MAX542-02
ZERO-CODE OFFSET ERROR
vs. TEMPERATURE
0.8
ZERO-CODE OFFSET ERROR (LSB)
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
MAX542-03
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
0.34
SUPPLY CURRENT (mA)
0.33
0.32
0.31
0.30
0.29
0.28
1.0
100
0
1
2
3
4
5
6
-1.0
-60
-20
20
60
100
140
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
TEMPERATURE (°C)
INTEGRAL NONLINEARITY
vs. TEMPERATURE
MAX542-04
DIFFERENTIAL NONLINEARITY
vs. TEMPERATURE
MAX542-05
GAIN ERROR
vs. TEMPERATURE
0.8
0.6
GAIN ERROR (LSB)
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
MAX542-06
1.0
0.8
0.6
0.4
1.0
0.8
0.6
0.4
DNL (LSB)
1.0
INL (LSB)
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-60
-20
20
-INL
+INL
0.2
0
-0.2
-0.4
-0.6
-0.8
-DNL
+DNL
60
100
140
-1.0
-60
-20
20
60
100
140
-1.0
-60
-20
20
60
100
140
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
INTEGRAL NONLINEARITY
vs. CODE
MAX542-07
DIFFERENTIAL NONLINEARITY
vs. CODE
0.75
0.50
0.25
DNL (LSB)
0
-0.25
-0.50
-0.75
-1.00
0
0
10k
20k
30k
40k
50k
60k
70k
0
10k
MAX542-08
REFERENCE CURRENT
vs. CODE
MAX542-09
1.00
0.75
0.50
0.25
INL (LSB)
0
-0.25
-0.50
-0.75
-1.00
0
10k
20k
30k
40k
50k
60k
1.00
200
160
REFERENCE CURRENT (µA)
120
80
40
70k
20k
30k
40k
50k
60k
70k
DAC CODE
DAC CODE
DAC CODE
4
_______________________________________________________________________________________
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
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)
MAX542-10
MAX541/MAX542
FULL-SCALE STEP RESPONSE
(f
SCLK
= 20MHz)
C
L
= 10pF
R
L
=
∞
MAX542-10A
C
L
= 10pF
R
L
=
∞
OUT
500mV/div
OUT
500mV/div
2µs/div
1µs/div
2µs/div
400ns/div
MAJOR-CARRY OUTPUT GLITCH
MAX542-11
DIGITAL FEEDTHROUGH
MAX542-12
CS
(5V/div)
SCLK
5V/div
OUT
(AC-COUPLED,
100mV/div)
OUT
(AC-COUPLED,
50mV/div)
2µs/div
2µs/div
CODE = 0000 hex
Pin Descriptions
MAX541
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
5
FUNCTION
_______________________________________________________________________________________
Microchip MCU
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