MAX5168NCCM Maxim Integrated, MAX5168NCCM Datasheet - Page 13

• Manufacturer Part Number: MAX5168NCCM
• Description: Sample & Hold Amplifiers
• Manufacturer: Maxim Integrated
• Series: MAX5168r

Specifications of MAX5168NCCM

• Number Of Channels: 32
• Acquisition Time: 4 us
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-48
• Minimum Dual Supply Voltage: - 4.75 V, + 9.5 V

Figure 6 shows the MAX5175/MAX5177 configured for
unipolar, rail-to-rail operation with a gain of +2V/V.
Table 2 lists the codes for unipolar output voltages. The
output voltage is limited to V
Figure 7 shows the MAX5175/MAX5177 configured for
bipolar output operation. The output voltage is given by
the following equation (FB = OUT):
Figure 6. Unipolar Output Circuit (Rail-to-Rail)
Table 2. Unipolar Code Table (Circuit of
Figure 6)
MSB
11 1111 1111 11 (00)
10 0000 0000 01 (00)
10 0000 0000 00 (00)
01 1111 1111 11 (00)
00 0000 0000 01 (00)
00 0000 0000 00 (00)
MAX5175
MAX5177
DAC CONTENTS
V
REF
Applications Information
OUT
______________________________________________________________________________________
DAC
LSB
V
REF
DD
Low-Power, Serial, 12-Bit DACs with
4096
+5V/+3.3V
.
2N
V
2 · V
2 · V
2 · V
2 · V
DD
ANALOG OUTPUT
GND
2 · V
Unipolar Output
Bipolar Output
REF
REF
REF
REF
REF
1
(4095/4096)
(2049/4096)
(2048/4096)
(2047/4096)
0
FB
OUT
(1/4096)
10k
10k
Force/Sense Voltage Output
where N represents the numeric value of the DAC’s
binary input code and V
nal reference. Table 3 shows digital codes and the cor-
responding output voltage for Figure 7’s circuit.
The serial data output pin (DOUT) allows multiple
MAX5175/MAX5177s to be daisy-chained together as
shown in Figure 8. The advantage of this is that only
two lines are needed to control all of the DACs on the
line. The disadvantage is that it takes n commands to
program the DACs. Figure 9 shows several MAX5175/
MAX5177s sharing one common DIN signal line. In this
configuration the data bus is common to all devices;
however, more I/O lines are required because each
device needs a dedicated CS line. The advantage of
this configuration is that only one command is needed
to program any DAC.
Figure 7. Bipolar Output Circuit
Table 3. Bipolar Code Table (Circuit of
Figure 7)
MSB
REF
11 1111 1111 11 (00)
10 0000 0000 01 (00)
10 0000 0000 00 (00)
01 1111 1111 11 (00)
00 0000 0000 01 (00)
00 0000 0000 00 (00)
DAC CONTENTS
DAC
MAX5175
MAX5177
+5V/+3.3V
10k
GND
V
DD
LSB
REF
Daisy-Chaining Devices
OUT
FB
R1 = R2 = 10k ± 0.1%
is the voltage of the exter-
+V
+V
+V
+V
+V
REF
REF
REF
REF
ANALOG OUTPUT
REF
[(2 · 4095/4096) - 1]
[(2 · 2049/4096) - 1]
[(2 · 2048/4096) - 1]
[(2 · 2047/4096) - 1]
[(2 · 1/4096) - 1]
V+
V-
-V
10k
REF
V
OUT
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