MAX5130 Maxim Integrated Products, MAX5130 Datasheet - Page 17

• Manufacturer Part Number: MAX5130
• Description: (MAX5130 / MAX5131) Voltage-output DACs
• Manufacturer: Maxim Integrated Products

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The MAX5130/MAX5131 have multiplying capabilities
within the reference input voltage range specifications.
Figure 14 shows a technique for applying a sinusoidal
input to REF, where the AC signal is offset before being
applied to the reference input.
On power-up, the input and DAC registers are cleared
to either zero (RSTVAL = DGND) or midscale (RSTVAL
Figure 13. Multiple Devices Share One Common Digital Input (DIN)
Figure 14. External Reference with AC Components
SCLK
CS1
CS2
CS3
DIN
+3V/+5V, 13-Bit, Serial Voltage-Output DACs
Power-Supply and Bypassing
______________________________________________________________________________________
Using an External Reference
REFERENCE
+5V/+3V
500mVp-p
INPUT
AC
CS
SCLK
DIN
with AC Components
MAX5130
MAX5131
I
Considerations
10k
26k
+5V/+3V
MAX495
CS
SCLK
DIN
MAX5130
MAX5131
with Internal Reference
AGND
DAC
II
= V
tor in parallel with a 0.1µF capacitor to AGND. Minimize
lead lengths to reduce lead inductance.
Digital and AC transient signals coupling to AGND can
create noise at the output. Connect AGND to the high-
est quality ground available. Use proper grounding
techniques, such as a multilayer board with a low-
inductance ground plane. Wire-wrapped boards and
sockets are not recommended. If noise becomes an
issue, shielding may be required.
REF
DD
MAX5130
MAX5131
). Bypass the power supply with a 4.7µF capaci-
V
DD
DGND
0.6384R
R
CS
SCLK
DIN
MAX5131
MAX5130
OUT
OS
III
Layout Considerations
TO OTHER
SERIAL DEVICES
17