MAX5380-MAX5382 MAXIM [Maxim Integrated Products], MAX5380-MAX5382 Datasheet - Page 11

• Manufacturer Part Number: MAX5380-MAX5382
• Description: Low-Cost, Low-Power, 8-Bit DACs with 2-Wire Serial Interface in SOT23
• Manufacturer: MAXIM [Maxim Integrated Products]

are supported. RESTART protocol is supported, but an
immediate STOP condition is necessary to update the
DAC. The 8th bit of the address byte, typically used to
indicate a read or write protocol, is used in the MAX5380/
MAX5381/MAX5382 to enter or exit shutdown mode.
When MAX5380/MAX5381/MAX5382 are addressed in
I
Figure 7. Typical I
2
C read mode, they enter shutdown mode.
SDA SCL
µC
2
C Application
______________________________________________________________________________________
SCL
SDA
SCL
SDA
SCL
SDA
V
2V REFERENCE
4V REFERENCE
DD
MAX5381M
MAX5382N
MAX5380L
REFERENCE
Low-Cost, Low-Power, 8-Bit DACs with
V
OUT
V
OUT
V
OUT
DD
DD
DD
V
DD
GAIN ADJUSTMENT
OFFSET ADJUSTMENT
2-Wire Serial Interface in SOT23
THRESHOLD ADJUSTMENT
The serial 2-wire interface has logic levels defined as
V
Schmitt trigger buffers to accept slow-transition inter-
faces. This means that optocouplers can interface
directly to the MAX5380/MAX5381/MAX5382 without
additional external logic. The digital inputs are compati-
ble with CMOS logic levels and must not be driven with
voltages higher than V
Careful printed circuit board layout is important for best
system performance. To reduce crosstalk and noise
injection, keep analog and digital signals separate.
Ensure that the ground return from GND to the supply
ground is short and low impedance; a ground plane is
recommended. Bypass V
ground as close as possible to the device. If the supply
is excessively noisy, connect a 10Ω resistor in series
with the supply and V
tance.
TRANSISTOR COUNT: 2910
IL
= 0.3
Power-Supply Bypassing and Layout
x
V
Digital Inputs and Interface Logic
DD
Applications Information
and V
IH
DD
DD
= 0.7
.
DD
and add additional capaci-
Chip Information
with a 0.1µF capacitor to
x
V
DD
. All inputs include
11