|
|
PDF MAX5742 Data sheet ( Hoja de datos )
| Número de pieza | MAX5742 | |
| Descripción | 12-Bit / Low-Power / Quad / Voltage-Output DAC with Serial Interface | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX5742 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
19-2122; Rev 2; 7/03
12-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
General Description
The MAX5742 quad, 12-bit, low-power, buffered volt-
age-output, digital-to-analog converter (DAC) is pack-
aged in a space-saving 10-pin µMAX package (5mm ✕
3mm). The wide supply voltage range of +2.7V to
+5.5V and 229µA supply current accommodates low-
power and low-voltage applications. DAC outputs
employ on-chip precision output amplifiers that swing
Rail-to-Rail®. The MAX5742’s reference input accepts a
voltage range from 0 to VDD. In power-down the refer-
ence input is high impedance, further reducing the sys-
tem’s total power consumption.
The 20MHz, 3-wire SPI™, QSPI™, MICROWIRE™ and
DSP-compatible serial interface saves board space
and reduces the complexity of opto- and transformer-
isolated applications. The MAX5742 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 MAX5742’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 MAX5742
is specified over the -40°C to +125°C automotive tem-
perature range.
Applications
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
Features
o Ultra-Low Power Consumption
229µA at VDD = +3.6V
271µA at VDD = +5.5V
o Wide +2.7V to +5.5V Single-Supply Range
o 10-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
PART
MAX5742EUB
MAX5742AUB
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +125°C
PIN-PACKAGE
10 µMAX
10 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.
TOP VIEW
CS 1
SCLK 2
VDD 3
GND 4
DIN 5
MAX5742
µMAX
10 OUTD
9 OUTC
8 OUTB
7 OUTA
6 REF
________________________________________________________________ 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, Quad, 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 80 100 120
TEMPERATURE (°C)
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_
2 4 6 8 10 12 14 16
ISOURCE/SINK (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
480
CODE = 0 x 800
400
CODE = 0 x FFF
320
CODE = 0 x 000
240
160
80
0
2.7
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
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. CS INPUT VOLTAGE
900
800
700
600 VDD = +5V
500
400
300
VDD = +3V
200
100
0
012 3 4 5
CS INPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
290
280
270
VDD = 5.5V
260
250
240
230
220 VDD = 3.6V
210
200
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
_______________________________________________________________________________________ 5
5 Page 
12-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
CONTENTS OF SHIFT REGISTER
D15 (MSB)
D0 (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
tCSPWH
tCSS
C2
C1
C0
D11 D10
D1
D0
X
tCSH
CS
Figure 2. Timing Diagram
Applications Information
Unipolar Output
The typical application circuit (Figure 3) shows the
MAX5742 configured for a unipolar output, where the
output voltages and the reference inputs have the
same polarity. Table 3 lists the unipolar output codes.
Bipolar Output
The MAX5742 can be configured for bipolar operation
using a dual supply op amp (Figure 4). The transfer
function for bipolar operation is:
VOUT
=
VREF
2NB
4096
− 1
where NB is the decimal value of the DACs binary input
code. Table 4 shows digital codes (offset binary) and
corresponding output voltages for the circuit in Figure 4.
Power Supply and Layout Considerations
Careful PC board layout is important for optimal system
performance. To reduce noise injection and digital feed-
through, keep analog and digital signals separate.
Ensure that that the return path from GND to the supply
ground is short and low impedance. Use a ground
plane. Bypass VDD to GND with a 0.1µF capacitor as
close as possible to VDD.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX5742.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX5741 | 10-Bit / Low-Power / Quad / Voltage-Output DAC with Serial Interface | Maxim Integrated |
| MAX5741EUB | 10-Bit / Low-Power / Quad / Voltage-Output DAC with Serial Interface | Maxim Integrated |
| MAX5742 | 12-Bit / Low-Power / Quad / Voltage-Output DAC with Serial Interface | Maxim Integrated |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |