19-1587; Rev 0; 11/99
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
General Description
The MAX5104 low-power, serial, voltage-output, dual
12-bit digital-to-analog converter (DAC) consumes only
500µA from a single +5V supply. This device features
Rail-to-Rail
®
output swing and is available in a space-
saving 16-pin QSOP package. To maximize the dynamic
range, the DAC output amplifiers are configured with an
internal gain of +2V/V.
The 3-wire serial interface is SPI™/QSPI™/MICROWIRE™
compatible. Each DAC has a double-buffered input
organized as an input register followed by a DAC register,
which allows the input and DAC registers to be updated
independently or simultaneously with a 16-bit serial
word. Additional features include programmable power-
down (2µA), hardware power-down lockout (PDL), a
separate reference voltage input for each DAC that
accepts AC and DC signals, and an active-low clear
input (CL) that resets all registers and DACs to zero.
These devices provide a programmable logic pin for
added functionality, and a serial-data output pin for
daisy chaining.
____________________________Features
o
12-Bit Dual DAC with Internal Gain of +2V/V
o
Rail-to-Rail Output Swing
o
12µs Settling Time
o
+5V Single-Supply Operation
o
Low Quiescent Current
500µA (normal operation)
2µA (power-down mode)
o
SPI/QSPI/MICROWIRE Compatible
o
Space-Saving 16-Pin QSOP Package
o
Power-On Reset Clears Registers and DACs to Zero
o
Adjustable Output Offset
MAX5104
Ordering Information
PART
MAX5104CEE
MAX5104EEE
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
PIN-
PACKAGE
16 QSOP
16 QSOP
INL
(LSB)
±4
±4
________________________Applications
Industrial Process Control
Remote Industrial Controls
Digital Offset and Gain Adjustment
Microprocessor-Controlled Systems
Motion Control
Automatic Test Equipment (ATE)
Pin Configuration appears at end of data sheet.
Functional Diagram
DOUT
CL
PDL
DGND
AGND
V
DD
REFA
OSA
DECODE
CONTROL
R
R
INPUT
REG A
DAC
REG A
DAC A
R
OUTA
OSB
16-BIT
SHIFT
REGISTER
SR
CONTROL
MAX5104
LOGIC
OUTPUT
SCLK
UPOH
INPUT
REG B
DAC
REG B
DAC B
R
OUTB
CS
DIN
REFB
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
1
________________________________________________________________
Maxim Integrated Products
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-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
MAX5104
ABSOLUTE MAXIMUM RATINGS
V
DD
to AGND............................................................-0.3V to +6V
V
DD
to DGND ...........................................................-0.3V to +6V
AGND to DGND ..................................................................±0.3V
OSA, OSB to AGND.......................(V
AGND
- 4V) to (V
DD
+ 0.3V)
REF_, OUT_ to AGND.................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs (SCLK, DIN,
CS,
CL, PDL)
to DGND ...........................................(-0.3V to +6V)
Digital Outputs (DOUT, UPO) to DGND .....-0.3V to (V
DD
+ 0.3V)
Maximum Current into Any Pin .........................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.30mW/°C above +70°C).......667mW
Operating Temperature Ranges
MAX5104CEE ...................................................0°C to +70°C
MAX5104EEE.................................................-40C° to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+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 ±10%, V
REFA
= V
REFB
= +2.048V, R
L
= 10kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C (OS_ connected to AGND for a gain of +2V/V).)
PARAMETER
STATIC PERFORMANCE
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset Tempco
Gain Error
Gain-Error Tempco
V
DD
Power-Supply
Rejection Ratio
REFERENCE INPUT
Reference Input Range
Reference Input Resistance
REF
R
REF
Minimum with code 1554 hex
Input code = 1FFE hex,
V
REF_
= 0.67Vp-p at 2.5V
DC
Input code = 0000 hex,
V
REF_
= (V
DD
- 1.4Vp-p), f = 1kHz
SINAD
Input code = 1FFE hex,
V
REF_
= 1Vp-p at 1.25V
DC
, f = 25kHz
CL, PDL, CS,
DIN, SCLK
CL, PDL, CS,
DIN, SCLK
200
V
IN
= 0 to V
DD
0.001
8
±1
3
0.8
0
14
20
V
DD
- 1.4
V
kΩ
PSRR
Normalized to 2.048V
4.5V
≤
V
DD
≤
5.5V
INL
DNL
V
OS
TCV
OS
(Note 1)
Guaranteed monotonic
Code = 10
Normalized to 2.048V
4
-0.2
4
20
600
±8
12
±4
±1
±10
Bits
LSB
LSB
mV
ppm/°C
LSB
ppm/°C
µV/V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MULTIPLYING-MODE PERFORMANCE
Reference 3dB Bandwidth
Reference Feedthrough
Signal-to-Noise plus
Distortion Ratio
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
V
IH
V
IL
V
HYS
I
IN
C
IN
V
V
mV
µA
pF
300
-82
75
kHz
dB
dB
2
_______________________________________________________________________________________
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V ±10%, V
REFA
= V
REFB
= +2.048V, R
L
= 10kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C (OS_ connected to AGND for a gain of +2V/V).)
PARAMETER
Output High Voltage
Output Low Voltage
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Output Settling Time
Output Voltage Swing
OSA or OSB Input Resistance
Time Required to Exit Shutdown
Digital Feedthrough
Digital Crosstalk
POWER SUPPLIES
Positive Supply Voltage
Power-Supply Current
Power-Supply Current
in Shutdown
Reference Current in Shutdown
TIMING CHARACTERISTICS
SCLK Clock Period
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Fall to SCLK Rise
Setup Time
SCLK Rise to
CS
Rise
Hold Time
SDI Setup Time
SDI Hold Time
SCLK Rise to DOUT
Valid Propagation Delay
SCLK Fall to DOUT
Valid Propagation Delay
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold
CS
Pulse Width High
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
DO1
t
DO2
t
CS0
t
CS1
t
CSW
C
LOAD
= 200pF
C
LOAD
= 200pF
10
40
100
(Note 4)
100
40
40
40
0
40
0
80
80
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
DD
I
DD
(Note 3)
4.5
0.5
2
0
5.5
0.65
10
±1
V
mA
µA
µA
CS
= V
DD
, SCLK = 100kHz, V
SCLK
= 5Vp-p
R
OS_
SR
To 1/2LSB of full-scale, V
STEP
= 4V
Rail-to-rail (Note 2)
24
0.75
15
0 to V
DD
34
25
5
5
V/µs
µs
V
kΩ
µs
nVs
nVs
SYMBOL
V
OH
V
OL
I
SOURCE
= 2mA
I
SINK
= 2mA
CONDITIONS
MIN
V
DD
- 0.5
0.13
0.40
TYP
MAX
UNITS
V
V
DIGITAL OUTPUTS
(DOUT, UPO)
MAX5104
I
DD(SHDN)
(Note 3)
Note 1:
Accuracy is specified from code 6 to code 4095.
Note 2:
Accuracy is better than 1LSB for V
OUT_
greater than 6mV and less than V
DD
- 50mV. Guaranteed by PSRR test at the
end points.
Note 3:
Digital inputs are set to either V
DD
or DGND, code = 0000 hex, R
L
=
∞.
Note 4:
SCLK minimum clock period includes the rise and fall times.
_______________________________________________________________________________________
3
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
MAX5104
__________________________________________Typical Operating Characteristics
(V
DD
= +5V, R
L
= 10kΩ, C
L
= 100pF, OS_ pins connected to AGND, T
A
= +25°C, unless otherwise noted.)
REFERENCE VOLTAGE INPUT
FREQUENCY RESPONSE
MAX5104 toc01
SUPPLY CURRENT vs. TEMPERATURE
MAX5104 toc02
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
V
REF
= +1Vp-p AT 2.5V
DC
CODE = 1FFE (HEX)
-40
THD + N (dB)
MAX5104 toc03
0
-2
-4
RELATIVE OUTPUT (dB)
-6
-8
-10
-12
-14
-16
-18
-20
1
370
740
1110
1480
V
REF
= +0.67Vp-p AT 2.5V
DC
CODE = 1FFE (HEX)
700
650
SUPPLY CURRENT (µA)
600
550
500
450
400
V
REF
= +2.048V
R
L
=
∞
-55 -35 -15
5
25
45
65
CODE = 0000 (HEX)
CODE = 1FFE (HEX)
-30
-50
-60
-70
-80
1
10
FREQUENCY (kHz)
100
1850
85 105 125
FREQUENCY (kHz)
TEMPERATURE (°C)
FULL-SCALE ERROR vs. RESISTIVE LOAD
MAX5104 toc04
REFERENCE FEEDTHROUGH AT 1kHz
-60
-70
RELATIVE OUTPUT (dB)
-80
-90
-100
-110
-120
-130
V
REF
= +3.6Vp-p AT 1.88V
DC
CODE = 0000 (HEX)
MAX5104 toc05
0.50
V
REF
= +2.048V
0.25
FULL-SCALE ERROR (LSB)
0
-0.25
-0.50
-0.75
-1.00
-1.25
-1.50
0.1
1
R
L
(kΩ)
10
-50
-140
-150
100
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
FREQUENCY (kHz)
SHUTDOWN CURRENT
vs. TEMPERATURE
V
REF
= +1V
5
SHUTDOWN CURRENT (µA)
4
3
2
1
0
-55 -35 -15
5
25
45 65
85 105 125
TEMPERATURE (°C)
MAX5104 toc06
OUTPUT FFT PLOT
-10
-20
RELATIVE OUTPUT (dB)
-30
-40
-50
-60
-70
-80
-90
-100
0.5
1.6
2.7
3.8
4.9
6.0
FREQUENCY (kHz)
NOTE: RELATIVE TO FULL SCALE
V
REF
= +2.45Vp-p AT 1.225V
DC
f = 1kHz
CODE = 1FFE (HEX)
MAX5104 toc07
6
0
4
_______________________________________________________________________________________
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
_____________________________Typical Operating Characteristics (continued)
(V
DD
= +5V, R
L
= 10kΩ, C
L
= 100pF, OS_ pins connected to AGND, T
A
= +25°C, unless otherwise noted.)
MAX5104
DYNAMIC RESPONSE RISE TIME
MAX5104 toc08
DYNAMIC RESPONSE FALL TIME
MAX5104 toc09
CS
5V/div
CS
5V/div
OUT_
1V/div
OUT_
1V/div
2µs/div
V
REF
= +2.048V
V
REF
= +2.048V
2µs/div
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX51504 toc10
MAJOR-CARRY TRANSITION
MAX5104 toc11
0.60
CODE = 1FFE (HEX)
SUPPLY CURRENT (mA)
0.55
CS
2V/div
0.50
CODE = OOOO (HEX)
0.45
OUT_
50mV/div
AC-COUPLED
0.40
4.50
4.75
5.00
5.25
5.50
5µs/div
TRANSITION FROM 1000 (HEX) TO 0FFE (HEX)
SUPPLY VOLTAGE (V)
ANALOG CROSSTALK
MAX5104 toc12
DIGITAL FEEDTHROUGH
MAX5104 toc13
OUTA
5V/div
SCLK
5V/div
OUTB
200µV/div
AC-COUPLED
OUTA
500µV/div
AC-COUPLED
250µs/div
V
REF
= +2.048V, GAIN = +2V/V, CODE = 1FFE HEX
2.5µs/div
_______________________________________________________________________________________
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