MAX5290BEUD Maxim Integrated, MAX5290BEUD Datasheet - Page 31

• Manufacturer Part Number: MAX5290BEUD
• Description: Digital to Analog Converters - DAC
• Manufacturer: Maxim Integrated

Specifications of MAX5290BEUD

• Number Of Converters: 2
• Number Of Dac Outputs: 2
• 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-14
• 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 with a
10µF capacitor in parallel with a 0.1µF capacitor to ana-
log ground (AGND) and digital ground (DGND) (see
Figure 10). Minimize lead lengths to reduce lead induc-
tance. If noise is an issue, use shielding and/or ferrite
beads to increase isolation.
Digital and AC transient signals coupling to AGND cre-
ate noise at the output. Connect AGND to the highest
quality ground available. Use proper grounding tech-
Figure 10. Bypassing Power Supplies and Reference
10µF*
Power-Supply and Layout Considerations
V
**CONNECT ANALOG AND DIGITAL GROUND PLANES AT THE
REF
*REMOVE BYPASS CAPACITORS ON REF FOR AC-REFERENCE INPUTS.
LOW-IMPEDANCE POWER-SUPPLY SOURCE.
0.1µF*
UPIO1
UPIO2
SCLK
DSP
DIN
CS
PU
REF
Buffered, Fast-Settling, Dual, 12-/10-/8-Bit,
AV
______________________________________________________________________________________
DD
AV
AGND**
DD
MAX5290–MAX5295
0.1µF
10µF
DV
DD
DV
MAX5291/
MAX5293/
MAX5295
DD
DGND**
ONLY
0.1µF
OUTA
FBA
FBB
OUTB
10µF
niques, such as a multilayer board with a low-induc-
tance ground plane. Wire-wrapped boards and sockets
are not recommended. For optimum system perfor-
mance, use printed circuit (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 source (see Figure 11).
Figure 11. Separate Analog and Digital Power Supplies
Voltage-Output DACs
ANALOG SUPPLY
AV
AV
DD
DD
0.1µF
10µF
MAX5290–MAX5295
AGND
AGND
DV
DV
DIGITAL SUPPLY
DD
DD
0.1µF
10µF
DGND
DGND
DV
DD
CIRCUITRY
DD
DIGITAL
and DV
DGND
DD
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