DS4432U+ Maxim Integrated Products, DS4432U+ Datasheet - Page 9

• Manufacturer Part Number: DS4432U+
• Description: IC DAC 7BIT 2CH 5.5V 8-MSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS4432U+

• Number Of Bits: 7
• Data Interface: I²C, Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Number Of Dac Outputs: 2
• Resolution: 7 bit
• Interface Type: I2C
• Settling Time: 1.3 us
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Supply Current: 150 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Settling Time: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

I
current for the DS4432). Summing the currents into the
feedback node, we have the following:
where
and
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9
© 2008 Maxim Integrated Products
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
Figure 3. Example Application Circuit
OUT0
is chosen to be 100µA (midrange source/sink
PACKAGE TYPE
*V
OUT
4.7kΩ
8 µSOP
I
AND V
I
R A
OUT
0
I
FB
R B
0
=
0
VALUES ARE DETERMINED BY THE DC-DC CONVERTER AND SHOULD NOT BE CONFUSED WITH V
=
V
4.7kΩ
I
=
OUT
R B
Dual-Channel, I
0
R
R
V
FB
0
0
SDA
SCL
GND
−
−
B
A
I
V
R A
FB
0
FS0
DS4432
V
R
CC
FS0
= 80kΩ
OUT0
PACKAGE CODE
U8+1
To create a 20% margin in the supply voltage, the value
of V
is calculated to be 2.67kΩ, and R
4kΩ. The current DAC in this configuration allows the
output voltage to be moved linearly from 1.6V to 2.4V
using 127 settings. This corresponds to a resolution of
6.3mV/step.
To achieve the best results when using the DS4432,
decouple the power supply with a 0.01µF or 0.1µF
capacitor. Use a high-quality ceramic surface-mount
capacitor if possible. Surface-mount components mini-
mize lead inductance, which improves performance,
and ceramic capacitors tend to have adequate high-
frequency response for decoupling applications.
CONVERTER
DC-DC
is a registered trademark of Maxim Integrated Products, Inc.
V
CC
OUT
2
I
C, 7-Bit Sink/Source
OUT0
is set to 2.4V. With these values in place, R
FB
OUT
I
I
R0A
R0B
V
OUT
= 2.0V*
R
R
Package Information
0A
0B
OUT
= 4kΩ
= 2.67kΩ
AND V
Current DAC
DOCUMENT NO.
RFS
V
OF THE DS4432.
FB
21-0036
0A
= 0.8V*
V
is calculated to be
CC
Decoupling
0B