max5235 Maxim Integrated Products, Inc., max5235 Datasheet - Page 17

• Manufacturer Part Number: max5235
• Description: Single-supply 3v/5v, Voltage-output, Dual, Precision 12-bit Dacs
• Manufacturer: Maxim Integrated Products, Inc.

Figure 11. Digital Control of Gain and Offset
Figure 12. Multiple MAX5234/MAX5235 Sharing a Common DIN Line
capacitor in parallel with a 0.1µF capacitor to GND.
Minimize lead lengths to reduce lead inductance.
Digital and AC transient signals on GND can create
noise at the output. Connect GND to the highest quality
ground available. Use proper grounding techniques,
such as a multilayer board with a low-inductance
ground plane or star connect all ground return paths
V
V
REF
IN
Grounding and Layout Considerations
SCLK
CS1
CS2
CS3
DIN
SCLK
REFA
REFB
DIN
CS
Single-Supply 3V/5V, Voltage-Output, Dual,
REGISTER
______________________________________________________________________________________
SHIFT
MAX5234
MAX5235
CS
SCLK
DIN
INPUT
INPUT
REG A
REG B
MAX5234
MAX5235
V
DD
REG A
REG B
DAC
DAC
DAC A
DAC B
CS
SCLK
DIN
GND
MAX5234
MAX5235
121kΩ
121kΩ
back to the MAX5234/MAX5235 GND. Carefully lay out
the traces between channels to reduce AC cross-cou-
pling and crosstalk. Wire-wrapped boards and sockets
are not recommended. If noise becomes an issue,
shielding may be required.
TRANSISTOR COUNT: 4184
PROCESS: BiCMOS
Precision 12-Bit DACs
77.25kΩ
77.25kΩ
OUTA
OUTB
VOUT = (GAIN) (OFFSET)
R1
R3
= V
NA IS THE NUMERIC VALUE OF THE INPUT CODE FOR DAC A.
NB IS THE NUMERIC VALUE OF THE INPUT CODE FOR DAC B.
CS
SCLK
DIN
IN
R2
4096
2NA
MAX5234
MAX5235
R1 + R2
R2
R4
Chip Information
1 + R4
R3
V
OUT
–
V
TO OTHER
SERIAL DEVICES
REF
4096
2NB
R4
R3
17