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PDF MAX544 Data sheet ( Hoja de datos )
| Número de pieza | MAX544 | |
| Descripción | +5V / Serial-Input / Voltage-Output / 14-Bit DACs | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX544 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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19-1088; Rev 3; 12/99
+5V, Serial-Input, Voltage-Output, 14-Bit DACs
General Description
The MAX544/MAX545 are serial-input, voltage-output,
14-bit digital-to-analog converters (DACs) that operate
from a single +5V supply. They provide 14-bit perfor-
mance (±0.5LSB INL and ±0.9LSB DNL) over tempera-
ture without any adjustments. The DAC output is
unbuffered, resulting in a low supply current of 0.3mA
and a low offset error of 0.6mV.
The DAC output range is 0V to VREF. For bipolar opera-
tion, matched scaling resistors are provided in the
MAX545 for use with an external precision op amp
(such as the MAX400), generating a ±VREF output
swing. The MAX545 also includes Kelvin-sense con-
nections for the reference and analog ground pins to
reduce layout sensitivity.
A 16-bit serial word is used to load data into the DAC
latch. The 10MHz, 3-wire serial interface is compatible
with SPI™/QSPI™/MICROWIRE™, and it also interfaces
directly with optocouplers for applications requiring isola-
tion. A power-on reset circuit clears the DAC output to 0V
(unipolar mode) when power is initially applied.
The MAX544 is available in 8-pin plastic DIP and SO
packages. The MAX545 is available in 14-pin plastic
DIP and SO packages.
Applications
Digital Offset and Gain Adjustment
Instrumentation
Industrial Process Control
Automated Test Equipment
Data-Acquisition Systems
Features
o Full 14-Bit Performance Without Adjustments
o +5V Single-Supply Operation
o Low Power: 1.5mW
o 1µs Settling Time
o Unbuffered Voltage Output Directly Drives 60kΩ
Loads
o SPI/QSPI/MICROWIRE-Compatible Serial Interface
o Power-On Reset Circuit Clears DAC Output to 0V
(unipolar mode)
o Schmitt-Trigger Inputs for Direct Optocoupler
Interface
o Pin-Compatible 16-Bit Upgrades
(MAX541/MAX542)
Ordering Information
PART
MAX544ACPA
MAX544BCPA
MAX544ACSA
MAX544BCSA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
INL
(LSB)
±1/2
±1
±1/2
±1
Ordering Information continued at end of data sheet.
Functional Diagrams
TOP VIEW
Pin Configurations
OUT 1
AGND 2
REF 3
CS 4
MAX544
RFB 1
OUT 2
8 VDD AGNDF 3
AGNDS 4
7 DGND
REFS 5
6 DIN
REFF 6
5 SCLK
CS 7
MAX545
14 VDD
13 INV
12 DGND
11 LDAC
10 DIN
9 N.C.
8 SCLK
DIP/SO
DIP/SO
REFF
REFS
CS
LDAC
SCLK
DIN
MAX545
RINV
VDD
RFB
14-BIT DAC
CONTROL
LOGIC
DATA LATCH
SERIAL INPUT REGISTER
RFB
INV
OUT
AGNDF
AGNDS
DGND
Functional Diagrams continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
+5V, Serial-Input, Voltage-Output, 14-Bit DACs
Typical Operating Characteristics (continued)
(VDD = +5V, VREF = +2.5V, TA = +25°C, unless otherwise noted.)
FULL-SCALE STEP RESPONSE
(fSCLK = 10MHz)
CL = 10pF
RL = ∞
FULL-SCALE STEP RESPONSE
(fSCLK = 20MHz)
CL = 10pF
RL = ∞
OUT
500mV/div
OUT
500mV/div
2µs/div
1µs/div
MAJOR-CARRY OUTPUT GLITCH
CS
(5V/div)
2µs/div
400ns/div
DIGITAL FEEDTHROUGH
SCLK
5V/div
MAX544
PIN
1
2
3
4
5
6
7
8
2µs/div
OUT
(AC-COUPLED,
100mV/div)
MAX544/MAX545-11
CODE = 0000 hex
2µs/div
OUT
(AC-COUPLED,
50mV/div)
MAX544/MAX545-12
Pin Descriptions
NAME
OUT
AGND
REF
CS
SCLK
DIN
DGND
VDD
FUNCTION
DAC Output Voltage
Analog Ground
Voltage Reference Input. Connect to external +2.5V reference.
Chip-Select Input
Serial-Clock Input. Duty cycle must be between 40% and 60%.
Serial-Data Input
Digital Ground
+5V Supply Voltage
_______________________________________________________________________________________ 5
5 Page 
+5V, Serial-Input, Voltage-Output, 14-Bit DACs
Ordering Information (continued)
PART
TEMP. RANGE
MAX544AEPA -40°C to +85°C
MAX544BEPA -40°C to +85°C
MAX544AESA -40°C to +85°C
MAX544BESA -40°C to +85°C
MAX545ACPD 0°C to +70°C
MAX545BCPD 0°C to +70°C
MAX545ACSD 0°C to +70°C
MAX545BCSD 0°C to +70°C
MAX545AEPD -40°C to +85°C
MAX545BEPD -40°C to +85°C
MAX545AESD -40°C to +85°C
MAX545BESD -40°C to +85°C
MAX545BMJD -55°C to +125°C
*Contact factory for availability.
PIN-PACKAGE
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
14 Plastic DIP
14 Plastic DIP
14 SO
14 SO
14 Plastic DIP
14 Plastic DIP
14 SO
14 SO
14 Ceramic SB*
INL
(LSB)
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1
Functional Diagrams (continued)
MAX544
REF
VDD
14-BIT DAC
CS
DIN
SCLK
CONTROL
LOGIC
DATA LATCH
SERIAL INPUT REGISTER
DGND
OUT
AGND
Chip Information
TRANSISTOR COUNT: 2209
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX544.PDF ] | |
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