MAXIM MAX5722 Technical data
General Description
The MAX5722 dual,12-bit, low-power, buffered voltageoutput, digital-to-analog converter (DAC) is packaged
in a space-saving 8-pin µMAX package (5mm ✕ 3mm).
The wide supply voltage range of +2.7V to +5.5V and
112µA supply current accommodates low-power and
low-voltage applications. DAC outputs employ on-chip
precision output amplifiers that swing Rail-to-Rail®. The
MAX5722’s reference input accepts a voltage range
from 0 to VDD. In power-down, the reference input is
high impedance, further reducing the system’s total
power consumption.
The 20MHz, 3-wire SPI™, QSPI™, MICROWIRE™, and
DSP-compatible serial interface save board space and
reduce the complexity of opto- and transformer-isolated
applications. The MAX5722 on-chip power-on reset
(POR) circuit resets the DAC outputs to zero and loads
the output with a 100kΩ resistor to ground. This provides additional safety for applications that drive valves
or other transducers that need to be off on power-up.
The MAX5722’s software-controlled power-down
reduces supply current to less than 0.3µA and provides
software-selectable output loads (1kΩ, 100kΩ, or high
impedance) while in power-down. The MAX5722 is
specified over the -40°C to +125°C automotive temperature range.
Applications
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
Features
♦ Ultra-Low Power Consumption
112µA at V
DD
= +3.6V
135µA at VDD= +5.5V
♦ Wide +2.7V to +5.5V Single-Supply Range
♦ 8-Pin µMAX Package
♦ 0.3µA Power-Down Current
♦ Guaranteed 12-Bit Monotonicity (±1LSB DNL)
♦ Safe Power-Up Reset to Zero Volts at DAC Output
♦ Three Software-Selectable Power-Down
Impedances (100kΩ, 1kΩ, Hi-Z)
♦ Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE-
Compatible Serial Interface
♦ Rail-to-Rail Output Buffer Amplifiers
♦ Schmitt-Triggered Logic Inputs for Direct
Interfacing to Optocouplers
♦ Wide -40°C to +125°C Operating Temperature
Range
MAX5722
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
________________________________________________________________ Maxim Integrated Products 1
Pin Configuration
19-2124; Rev 2; 7/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
Ordering Information
Functional Diagram appears at end of data sheet.
查询MAX5722供应商
PART TEMP RANGE PIN-PACKAGE
MAX5722EUA -40°C to +85°C 8 µMAX
MAX5722AUA -40°C to +125°C 8 µMAX
TOP VIEW
1
V
DD
2
MAX5722
3
CS
4
µMAX
87OUTB
OUTAGND
REF
6
DINSCLK
5
MAX5722
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD= +2.7V to +5.5V, GND = 0, V
REF
= VDD, RL= 5kΩ, CL= 200pF, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
V
DD
= +5V, TA= +25°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.
VDDto GND..............................................................-0.3V to +6V
OUT_, SCLK, DIN, CS, REF to GND.............-0.3 to (V
DD
+ 0.3V)
Maximum Continuous Current Into Any Pin......................±50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.6 mW/°C above +70°C) ............362mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
STATIC ACCURACY (Note 1)
Resolution N 12 Bits
Integral Nonlinearity Error INL (Note 2) ±2 ±16 LSB
Differential Nonlinearity Error DNL Guaranteed monotonic (Note 2) ±1 LSB
Zero-Code Error OE Code = 000 0.4 1.5 % of FS
Zero-Code Tempco 2.3 ppm/°C
Gain Error GE Code = FFF hex ±3 % of FS
Gain-Error Tempco 0.26 ppm/°C
Power-Supply Rejection Ratio PSRR Code = FFF hex, ∆VDD = ±10% 58.8 dB
REFERENCE INPUT
Reference Input Voltage Range V
Reference Input Impedance R
Power-Down Reference Current In power-down mode (Note 3) 1 10 µA
DAC OUTPUT
Output Voltage Range No load (Note 4) 0 V
DC Output Impedance Code = 800 hex 0.8 Ω
Short-Circuit Current
Wake-Up Time
Output Leakage Current
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
REF
REF
In operation 64 90 126 kΩ
In power-down mode 2 MΩ
VDD = +3V 15
= +5V 48
V
DD
VDD = +3V 8
= +5V 8
V
DD
Power-down mode = output high
impedance
0V
±18 nA
DD
DD
V
V
mA
µs
MAX5722
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VDD= +2.7V to +5.5V, GND = 0, V
REF
= VDD, RL= 5kΩ, CL= 200pF, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
V
DD
= +5V, TA= +25°C.)
TIMING CHARACTERISTICS
(VDD= 2.7V to 5.5V, GND = 0, TA= T
MIN
to T
MAX
, unless otherwise noted.)
Note 1: DC specifications are tested without output loads.
Note 2: Linearity is guaranteed from code 115 to code 3981.
Note 3: Limited with test conditions.
Note 4: Offset and gain error limit the FSR.
Note 5: Guaranteed by design.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS (SCLK, DIN, CS)
Input High Voltage V
Input Low Voltage V
Input Leakage Current I
Input Capacitance C
DYNAMIC PERFORMANCE
Voltage-Output Slew Rate SR 0.5 V/µs
Voltage-Output Settling Time 400 hex to C00 hex (Note 5) 4 10 µs
Digital Feedthrough Any digital inputs from 0 to V
Digital Analog Glitch Impulse
DAC-to-DAC Crosstalk 2.4 nV-s
POWER REQUIREMENTS
Supply Voltage Range V
Supply Current with No Load I
Power-Down Supply Current I
VDD = +3V, +5V
IH
VDD = +3V, +5V
IL
IN
Digital inputs = 0 or V
IN
Major carry transition (code 7FF hex to code
800 hex)
DD
DD
DDPD
All digital inputs at 0 or V
All digital inputs at 0 or V
All digital inputs at 0 or V
0.7 x
V
DD
DD
±0.1 ±1µA
5pF
DD
0.15 nV-s
12 nV-s
2.7 5.5 V
= 3.6V 112 205
DD
= 5.5V 135 215
DD
= 5.5V 0.29 1 µA
DD
0.3 x
V
DD
V
V
µA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCLK Clock Frequency f
SCLK Pulse Width High t
SCLK Pulse Width Low t
CS Fall to SCLK Rise Setup Time t
SCLK Fall to CS Rise Setup Time t
DIN to SCLK Fall Setup Time t
DIN to SCLK Fall Hold Time t
CS Pulse Width High t
SCLK
CH
CL
CSS
CSH
DS
DH
CSW
020MHz
25 ns
25 ns
10 ns
10 ns
15 ns
0ns
80 ns
MAX5722
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
REF
= VDD, TA= +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY vs.
CODE, T
16
12
8
4
0
INL (LSB)
-4
-8
-12
-16
0 512 1024 1536 2048 2560 3072 3584 4096
= +25°C
A
CODE
MAX5722 toc01
VDD = +5V
VDD = +3V
DIFFERENTIAL NONLINEARITY vs.
= +25°C
CODE, T
1.0
0.8
0.6
0.4
0.2
0
DNL (LSB)
-0.2
-0.4
-0.6
-0.8
-1.0
0 512 1024 1536 2048 2560 3072 3584 4096
A
CODE
1.0
0.8
MAX5722 toc02
0.6
0.4
0.2
0
-0.2
TOTAL UNADJUSTED ERROR (%)
-0.4
-0.6
0 512 1024 1536 2048 2560 3072 3584 4096
TOTAL UNADJUSTED ERROR vs.
CODE, T
VDD = +3V
= +25°C
A
VDD = +5V
CODE
MAX5722 toc03
INTEGRAL NONLINEARITY vs.
= -40°C
CODE, T
16
12
8
4
0
INL (LSB)
-4
-8
-12
-16
0 512 1024 1536 2048 2560 3072 3584 4096
A
VDD = +5V
VDD = +3V
CODE
INTEGRAL NONLINEARITY vs.
= +125°C
CODE, T
16
12
8
4
0
INL (LSB)
-4
-8
-12
-16
0 512 1024 1536 2048 2560 3072 3584 4096
A
VDD = +5V
VDD = +3V
CODE
MAX5722 toc04
MAX5722 toc07
DIFFERENTIAL NONLINEARITY vs.
= -40°C
CODE, T
1.0
0.8
0.6
0.4
0.2
0
DNL (LSB)
-0.2
-0.4
-0.6
-0.8
-1.0
0 512 1024 1536 2048 2560 3072 3584 4096
A
CODE
DIFFERENTIAL NONLINEARITY vs.
= +125°C
CODE, T
1.0
0.8
0.6
0.4
0.2
0
DNL (LSB)
-0.2
-0.4
-0.6
-0.8
-1.0
0 512 1024 1536 2048 2560 3072 3584 4096
A
CODE
1.0
0.8
MAX5722 toc05
0.6
0.4
0.2
0
-0.2
TOTAL UNADJUSTED ERROR (%)
-0.4
-0.6
0 512 1024 1536 2048 2560 3072 3584 4096
1.0
0.8
MAX5722 toc08
0.6
0.4
0.2
0
-0.2
TOTAL UNADJUSTED ERROR (%)
-0.4
-0.6
0 512 1024 1536 2048 2560 3072 3584 4096
TOTAL UNADJUSTED ERROR vs.
= -40°C
CODE, T
A
VDD = +3V
VDD = +5V
CODE
TOTAL UNADJUSTED ERROR vs.
= +125°C
CODE, T
A
VDD = +3V
VDD = +5V
CODE
MAX5722 toc06
MAX5722 toc09
MAX5722
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(V
REF
= VDD, TA= +25°C, unless otherwise noted.)
0
40
20
100
80
60
140
120
160
-40 20 40-20 0 60 80 100 120
MAX5722 toc16
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
SUPPLY CURRENT
vs. TEMPERATURE
VDD = +5V
VDD = +3V
FULL-SCALE SETTLING TIME
(V
DD
= +5V)
MAX5722 toc18
V
OUT_
1V/div
1µs/div
V
SCLK
5V/div
CODE FFF HEX TO 000
R
L
= 5kΩ
C
L
= 200pF
WORST CASE INL AND DNL
vs. TEMPERATURE
16
12
8
4
0
-4
INL AND DNL (LSB)
MINIMUM DNL
-8
-12
-16
-40 0 20-20
MAXIMUM DNL
TEMPERATURE (°C)
MAXIMUM INL
MINIMUM INL
60 80 100 120
40
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
160
140
120
100
80
60
SUPPLY CURRENT (µA)
40
20
0
2.7 3.73.2 4.2 4.7 5.2
CODE = 3FF HEX
SUPPLY VOLTAGE (V)
SOURCE-AND-SINK CURRENT CAPABILITY
3.0
2.5
MAX5722 toc10
CODE = C00
2.0
HEX, SOURCING
CURRENT
(V)
FROM OUT_
1.5
OUT
V
1.0
0.5
0
042 6 8 10121416
POWER-DOWN SUPPLY CURRENT
300
250
MAX5722 toc13
200
150
100
50
POWER-DOWN SUPPLY CURRENT (nA)
0
2.7 3.73.2 4.2 4.7 5.2
= +3V)
(V
DD
CODE = FFF
HEX, SOURCING
CURRENT
FROM OUT_
CODE = 400 HEX,
SINKING CURRENT
INTO OUT_
CODE = 000 HEX,
SINKING CURRENT INTO OUT_
I
SOURCE/SINK
(mA)
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
MAX5722 toc11
MAX5722 toc14
SOURCE-AND-SINK CURRENT CAPABILITY
= +5V)
(V
5.0
4.5
4.0
3.5
3.0
(V)
2.5
OUT
V
2.0
1.5
1.0
0.5
0
0105 152025303540
DD
CODE = FFF HEX, SOURCING
CURRENT FROM OUT_
CODE = C00 HEX,
SOURCING CURRENT
FROM OUT_
CODE = 000 HEX,
SINKING CURRENT INTO OUT_
I
SOURCE/SINK
SUPPLY CURRENT vs.
CS INPUT VOLTAGE
900
800
700
600
500
400
300
SUPPLY CURRENT (µA)
200
100
0
021 345
VDD = +3V
CS INPUT VOLTAGE (V)
CODE = 400 HEX,
SINKING CURRENT
INTO OUT_
(mA)
VDD = +5V
MAX5722 toc12
MAX5722 toc15
FULL-SCALE SETTLING TIME
= +5V)
(V
DD
CODE 000 TO FFF HEX
R
C
1µs/div
= 5kΩ
L
= 200pF
L
MAX5722 toc17
V
SCLK
5V/div
V
OUT_
1V/div
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