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PDF MAX5722 Data sheet ( Hoja de datos )
| Número de pieza | MAX5722 | |
| Descripción | 12-Bit / Low-Power / Dual / Voltage-Output DAC with Serial Interface | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX5722 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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19-2124; Rev 2; 7/03
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
General Description
The MAX5722 dual,12-bit, low-power, buffered voltage-
output, 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 pro-
vides 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 temper-
ature range.
Features
o Ultra-Low Power Consumption
112µA at VDD = +3.6V
135µA at VDD = +5.5V
o Wide +2.7V to +5.5V Single-Supply Range
o 8-Pin µMAX Package
o 0.3µA Power-Down Current
o Guaranteed 12-Bit Monotonicity (±1LSB DNL)
o Safe Power-Up Reset to Zero Volts at DAC Output
o Three Software-Selectable Power-Down
Impedances (100kΩ, 1kΩ, Hi-Z)
o Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE-
Compatible Serial Interface
o Rail-to-Rail Output Buffer Amplifiers
o Schmitt-Triggered Logic Inputs for Direct
Interfacing to Optocouplers
o Wide -40°C to +125°C Operating Temperature
Range
Applications
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
PART
MAX5722EUA
MAX5722AUA
TOP VIEW
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +125°C
PIN-PACKAGE
8 µMAX
8 µMAX
Pin Configuration
Functional Diagram appears at end of data sheet.
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.
VDD 1
GND 2
CS 3
SCLK 4
MAX5722
8 OUTB
7 OUTA
6 REF
5 DIN
µMAX
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
Typical Operating Characteristics (continued)
(VREF = VDD, TA = +25°C, unless otherwise noted.)
WORST CASE INL AND DNL
vs. TEMPERATURE
16
12
8
MAXIMUM DNL
MAXIMUM INL
4
0
-4
MINIMUM DNL
-8
MINIMUM INL
-12
-16
-40 -20
0 20 40 60 80
TEMPERATURE (°C)
100 120
SOURCE-AND-SINK CURRENT CAPABILITY
(VDD = +3V)
3.0
CODE = FFF
HEX, SOURCING
2.5 CURRENT
2.0
CODE = C00
HEX, SOURCING
FROM OUT_
CURRENT
1.5 FROM OUT_
CODE = 400 HEX,
1.0 SINKING CURRENT
INTO OUT_
0.5
CODE = 000 HEX,
SINKING CURRENT INTO OUT_
0
0 2 4 6 8 10 12 14 16
ISOURCE/SINK (mA)
SOURCE-AND-SINK CURRENT CAPABILITY
(VDD = +5V)
5.0
CODE = FFF HEX, SOURCING
4.5 CURRENT FROM OUT_
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
CODE = C00 HEX,
SOURCING CURRENT
FROM OUT_
CODE = 400 HEX,
SINKING CURRENT
INTO OUT_
CODE = 000 HEX,
SINKING CURRENT INTO OUT_
5 10 15 20 25 30 35 40
ISOURCE/SINK (mA)
160
140
120
100
80
60
40
20
0
2.7
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
CODE = 3FF HEX
3.2 3.7 4.2 4.7
SUPPLY VOLTAGE (V)
5.2
POWER-DOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
300
250
200
150
100
50
0
2.7
3.2 3.7 4.2 4.7
SUPPLY VOLTAGE (V)
5.2
900
800
700
600
500
400
300
200
100
0
0
SUPPLY CURRENT vs.
CS INPUT VOLTAGE
VDD = +5V
VDD = +3V
12 3 4
CS INPUT VOLTAGE (V)
5
SUPPLY CURRENT
vs. TEMPERATURE
160
140
120 VDD = +3V
100
80 VDD = +5V
60
40
20
0
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
FULL-SCALE SETTLING TIME
(VDD = +5V)
MAX5722 toc17
VSCLK
5V/div
FULL-SCALE SETTLING TIME
(VDD = +5V)
MAX5722 toc18
VSCLK
5V/div
CODE 000 TO FFF HEX
RL = 5kΩ
CL = 200pF
VOUT_
1V/div
1µs/div
CODE FFF HEX TO 000
RL = 5kΩ
CL = 200pF
1µs/div
VOUT_
1V/div
_______________________________________________________________________________________ 5
5 Page 
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
CONTENTS OF SHIFT REGISTER
B15 (MSB)
B0 (LSB)
C3 C2 C1 C0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Figure 1. 16-Bit Input Word
tCL tCH
SCLK
X
1
2
3
4
5
6
tOS tOH
16 X
DIN X
C3
tCSW
tCSS
CS
C2 C1 C0 D11 D10
D1 D0
X
tCSH
Figure 2. Timing Diagram
+2.7V TO +5.5V
IN OUT
MAX6050
GND
REF
DAC_
GND
VDD
OUT_
MAX5722
Figure 3. Typical Operating Circuit, Unipolar Output
REF
DAC_
R1
+2.7V TO +5.5V
VDD
OUT_
MAX5722
R2
V+
-V
R1 = R2
Figure 4. Bipolar Output Circuit
VOUT
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX5722.PDF ] | |
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