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PDF MAX5741 Data sheet ( Hoja de datos )
| Número de pieza | MAX5741 | |
| Descripción | 10-Bit / Low-Power / Quad / Voltage-Output DAC with Serial Interface | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-2123; Rev 2; 7/03
10-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
General Description
Features
The MAX5741 quad, 10-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 MAX5741’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.
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 10-Bit Monotonicity (±1LSB DNL)
o Safe Power-Up Reset to Zero Volts at DAC Output
The 20MHz, 3-wire SPI™, QSPI™, MICROWIRE™ and o Three Software-Selectable Power-Down
DSP-compatible serial interface saves board space and
reduces the complexity of opto- and transformer-isolated
applications. The MAX5741 on-chip power-on reset
Impedances (100kΩ, 1kΩ, Hi-Z)
o Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE-
(POR) circuit resets the DAC outputs to zero and loads
Compatible Serial Interface
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
o Rail-to-Rail Output Buffer Amplifiers
o Schmitt-Triggered Logic Inputs for Direct
MAX5741’s software controlled power-down reduces
Interfacing to Optocouplers
supply current to less than 0.1µA and provides software-
selectable output loads (1kΩ, 100kΩ, or high impedance)
o Wide -40°C to +125°C Operating Temperature
while in power-down. The MAX5741 is specified oveDratthaeSheet4UR.acnomge
-40°C to +125°C extended temperature range and avail-
able in a 10-pin µMAX package
DataShee
Applications
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
PART
MAX5741EUB
MAX5741AUB
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
MAX5741
µMAX
10 OUTD
9 OUTC
8 OUTB
7 OUTA
6 REF
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________________________________________________________________ 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.
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10-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
4
3
2
1
MAXIMUM DNL
MAXIMUM INL
0
-1
MINIMUM DNL MINIMUM INL
-2
-3
-4
-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 VDD = 5V
2.5 CODE = C00 HEX,
SOURCING CURRENT
2.0 FROM OUT_
1.5
1.0
0.5
0
0
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)
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290
270
250
230
210
190
170
150
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
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200
150
100
50
0
2.7
3.2 3.7 4.2 4.7
SUPPLY VOLTAGE (V)
5.2
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)
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10-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
CONTENTS OF INPUT SHIFT
D15 (MSB)
D0 (LSB)
C3 C2 C1 C0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S1 S0
Figure 1. 16-Bit Input Word
SCLK
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CS
DIN
tCH
tCL
tCSW
tCSS
tDS
tDH
C3
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tCSH
SO
DataShee
Figure 2. Timing Diagram
Digital Inputs
The digital inputs are compatible with CMOS logic. In
order to save power and reduce input to output cou-
pling, SCLK and DIN input buffers are powered down
immediately after completion of shifting 16 bits into the
input shift register. A high to low transition at CS pow-
ers up SCLK and DIN input buffers.
Applications Information
Unipolar Output
The typical application circuit (Figure 3) shows the
MAX5741 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 MAX5741 can be configured for bipolar operation
using a dual supply op amp (Figure 4). The transfer
function for bipolar operation is:
VOUT
=
VREF
2D
1024
− 1
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| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX5741.PDF ] | |
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