MAX5548 Datasheet, PDF (14/15 Pages) Maxim Integrated Products – Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC

Dual, 8-Bit, Programmable, 30mA
High-Output-Current DAC
CONTROLLER
DEVICE
MAX5548
DIN(0)
SCLK
CS ^DOUT(0)
MAX5548
DIN(1)
SCLK
CS ^DOUT(1)
MAX5548
DIN(2)
SCLK
CS ^DOUT(2)
Pin Configuration
TOP VIEW
12 11 10 9
N.C. 13
8 ^GND
V_DD 14
N.C. 15
MAX5548
7 REFIN
6 N.C.
GND 16
5 DOUT/A1
1234
THIN QFN (3mm x 3mm)
Figure 8. Daisy-Chain Configuration
Power Sequencing
Ensure that the voltage applied to REFIN does not
exceed V_DD at any time. If proper power sequencing is
not possible, connect an external Schottky diode
between REFIN and V_DD to ensure compliance with the
absolute maximum ratings.
Power-Supply Bypassing and Ground
Management
Digital or AC transient signals on GND create noise at
the analog output. Return GND to the highest-quality
ground plane available. For extremely noisy environ-
ments, bypass REFIN and V_DD to GND with 1µF and
0.1µF capacitors with the 0.1µF capacitor as close to
the device as possible. Careful PC board ground layout
minimizes crosstalk between the DAC outputs and
digital inputs.
PROCESS: BiCMOS
Chip Information
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