MAX5581AEUP-T Maxim Integrated, MAX5581AEUP-T Datasheet - Page 32

• Manufacturer Part Number: MAX5581AEUP-T
• Description: Digital to Analog Converters - DAC
• Manufacturer: Maxim Integrated

Specifications of MAX5581AEUP-T

• Number Of Converters: 4
• Number Of Dac Outputs: 4
• Resolution: 12 bit
• Interface Type: QSPI, SPI, Serial (3-Wire, Microwire)
• Settling Time: 6 us
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP EP
• Minimum Operating Temperature: - 40 C
• Output Type: Voltage
• Supply Voltage - Max: 5.25 V
• Supply Voltage - Min: 2.7 V
• Voltage Reference: External

Bypass the analog and digital power supplies by using a
10µF capacitor in parallel with a 0.1µF capacitor to AGND
and DGND (Figure 10). Minimize lead lengths to reduce
lead inductance. Use shielding and/or ferrite beads to fur-
ther increase isolation.
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-
Buffered, Fast-Settling, Quad,
12-/10-/8-Bit, Voltage-Output DACs
Figure 10. Bypassing Power Supplies AV
32
Power-Supply and Layout Considerations
MAX6126
______________________________________________________________________________________
*MAX5581/MAX5583/MAX5585 ONLY.
**REMOVE BYPASS CAPACITORS ON REF FOR AN AC REFERENCE INPUT.
***CONNECT ANALOG AND DIGITAL GROUND AT THE PLANES AT
THE LOW-IMPEDANCE POWER-SUPPLY SOURCE.
1µF**
AV
DD
0.1µF**
10µF
REF
CS
SCLK
DIN
PU
DSP
AGND***
0.1µF
MAX5580–
AV
MAX5585
DD
DV
DGND***
DD
DD
0.1µF
UPIO1
UPIO2
OUTB
OUTC
OUTD
OUTA
, DV
FBC*
FBD*
FBA*
FBB*
DD
10µF
, and REF
DV
DD
inductance ground plane. Wire-wrapped boards and
sockets are not recommended. For optimum system
performance, use PC boards with separate analog and
digital ground planes. Connect the two ground planes
together at the low-impedance power-supply source.
Using separate power supplies for AV
improves noise immunity. Connect AGND and DGND at
the low-impedance power-supply sources (Figure 11).
Figure 11. Separate Analog and Digital Power Supplies
AV
AV
ANALOG SUPPLY
DD
DD
0.1µF
10µF
MAX5580–MAX5585
AGND
AGND
DV
DV
DIGITAL SUPPLY
DD
DD
0.1µF
10µF
DGND
DGND
DV
DD
CIRCUITRY
DIGITAL
DD
DGND
and DV
DD