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MAX5259EEE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
MAX5258/MAX5259
+3V/+5V, Low-Power, 8-Bit Octal DAC
with Rail-to-Rail Output Buffers
16 ______________________________________________________________________________________
MAX5258/
MAX5259
SCLK
LDAC
DIN
CS
TO OTHER
SERIAL
DEVICES
MAX5258/
MAX5259
SCLK
LDAC
DIN
CS
MAX5258/
MAX5259
SCLK
LDAC
DIN
CS
CS1
CS2
CS3
DIN
SCLK
LDAC
Figure 4. Multiple MAX5258’s Sharing One DIN Line. (Simultaneously Update by Strobing
LDAC
, or Specifically Update by Enabling
an Individual
CS
)
MAX5258/
MAX5259
MICROWIRE
PORT
SCLK
DIN
CS
SK
SO
I/O
MAX5258/
MAX5259
SPI/QSPI
PORT
SCLK
DIN
CS
SCK
MOSI
I/O
CPOL = 0, CPHA = 0
Figure 5. Connections for MICROWIRE
Figure 6. Connections for SPI/QSPI
MAX5258/
MAX5259
MAX5258/
MAX5259
SCLK
DIN
CS
DOUT
DEVICE A DEVICE B DEVICE C
TO OTHER
SERIAL DEVICES
DOUT DOUT
SCLK
DIN
CS
MAX5258/
MAX5259
SCLK
DIN
CS
SCLK
DIN
CS
SCLK
DIN
CS
MAX5258/
MAX5259
SCLK
DIN
CS
Figure 7. Daisy-Chained or Individual MAX5258s Simultaneously Updated by Bringing
CS
High (Only Three Wires Are Required)
Power Sequencing
The voltage applied to REF should not exceed V
DD
at
any time. If proper power sequencing is not possible,
connect an external Schottky diode between REF and
V
DD
to ensure compliance with the absolute maximum
ratings. Do not apply signals to the digital inputs before
the device is fully powered-up.
Power-Supply Bypassing and
Ground Management
Bypass V
DD
with a 0.1µF capacitor, located as close to
V
DD
and GND as possible. Careful PC board layout
minimizes crosstalk among DAC outputs and digital
inputs. Figure 10 shows suggested circuit board layout
to minimize crosstalk.
Unipolar-Output, Two-Quadrant
Multiplication
In unipolar operation, the output voltages and the refer-
ence input are the same polarity. Figure 11 shows the
MAX5258/MAX5259 unipolar configuration, and Table 2
shows the unipolar code.
MAX5258/MAX5259
+3V/+5V, Low-Power, 8-Bit Octal DAC
with Rail-to-Rail Output Buffers
______________________________________________________________________________________ 17
REF
R1
R15
R16
R255
R0
D7
D6
D5
D4
DAC A
MSB DECODER
D3
D0
D2 D1
LSB DECODER
Figure 8. DAC Simplified Circuit Diagram
OUTC
OUTD
DOUT
DIN
SYSTEM GND
OUTB
OUTA
GND
V
DD
REF
LDAC
Figure 10. Suggested PC Board Layout for Minimizing
Crosstalk (Bottom View)
O
DAC CODE
NEGATIVE
OFFSET
OUTPUT
VOLTAGE
Figure 9. Effect of Negative Offset (Single Supply)
MAX5258/MAX5259
Note: 1LSB = (V
REF
)
✕
(2
8
) = +V
REF
(1 / 256)
____________________Chip Information
TRANSISTOR COUNT: 13625
PROCESS: BiCMOS
+3V/+5V, Low-Power, 8-Bit Octal DAC
with Rail-to-Rail Output Buffers
18 ______________________________________________________________________________________
DAC A
REFERENCE INPUT
+3V
REF
V
DD
DAC B
DAC C
DAC D
DAC E
DAC F
DAC G
DAC H
OUT A
OUT B
OUT C
OUT D
OUT E
OUT F
OUT G
OUT H
MAX5258/
MAX5259
Figure 11. Unipolar Output Circuit
DAC CONTENTS
MSB LSB
ANALOG OUTPUT
1111 1111 +V
REF
(255/256)
1000 0001 +V
REF
(129/256)
1000 0000
+V
REF
(128/256) = +V
REF
/2
0111 1111 +V
REF
(127/256)
0000 0001 +V
REF
(1/256)
0000 0000 0
Table 2. Unipolar Code Table
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX5259EEE+T

Mfr. #:
Buy MAX5259EEE+T
Manufacturer:
Maxim Integrated
Description:
Digital to Analog Converters - DAC 8-Bit 8Ch Precision DAC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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