MAX5141 Maxim, MAX5141 Datasheet - Page 10

• Manufacturer Part Number: MAX5141
• Description: +3V/+5V / Serial-Input / Voltage-Output / 14-Bit DACs
• Manufacturer: Maxim

+3V/+5V, Serial-Input,
Voltage-Output, 14-Bit DACs
TRANSISTOR COUNT: 2800
PROCESS: BiCMOS
10
Figure 2a shows the MAX5141–MAX5144 configured for
unipolar operation with an external op amp. The op amp
is set for unity gain, and Table 1 lists the codes for this
circuit. Bipolar MAX5142/MAX5144 can also be used in
unipolar configuration by connecting RFB and INV to
REF. This allows the DAC to power up to midscale.
Figure 2b shows the MAX5141–MAX5144 configured
for bipolar operation with an external op amp. The op
amp is set for unity gain with an offset of -1/2V
Table 2 shows the offset binary codes for this circuit
(less than 0.25 inches).
Bypass V
between V
leads close to the device (less than 0.25 inches).
SCLK
CLR
REF
DIN
CS
______________________________________________________________________________________
DD
DD
MAX5141
MAX5143
with a 0.1µF ceramic capacitor connected
CONTROL
and GND. Mount the capacitor with short
LOGIC
Power-Supply Bypassing and
Unipolar Configuration
Bipolar Configuration
GND
Chip Information
V
Ground Management
DD
SERIAL INPUT REGISTER
14-BIT DATA LATCH
14-BIT DAC
REF
OUT
.
SCLK
CLR
REF
DIN
CS
Table 1. Unipolar Code Table
Table 2. Bipolar Code Table
DAC LATCH CONTENTS
DAC LATCH CONTENTS
MSB
MSB
1111 1111 1111 11
1000 0000 0000 00
0000 0000 0000 01
1111 1111 1111 11
1000 0000 0000 01
1000 0000 0000 00
0111 1111 1111 11
0000 0000 0000 00
MAX5142
MAX5144
CONTROL
LOGIC
LSB
LSB
GND
V
Functional Diagrams
DD
V
V
V
+V
+V
0V
-V
-V
SERIAL INPUT REGISTER
REF ✕
REF ✕
REF ✕
REF ✕
REF ✕
14-BIT DATA LATCH
REF ✕
REF ✕
ANALOG OUTPUT, V
ANALOG OUTPUT, V
14-BIT DAC
(8192 / 16,384) = 1/ 2 V
(1 / 16,384)
(16,383 / 16,384)
(8192 / 8192) = -V
(1 / 8192)
(8191 / 8192)
(1 / 8192)
RFB
INV
OUT
OUT
OUT
REF
REF