ML6401CS-3 MICRO-LINEAR [Micro Linear Corporation], ML6401CS-3 Datasheet - Page 7

• Manufacturer Part Number: ML6401CS-3
• Description: 8-Bit 20 MSPS A/D Converter
• Manufacturer: MICRO-LINEAR [Micro Linear Corporation]

Note:
3. CXD1175 — Connect VRBS to VRB and leave VRTS
*POT R7 WILL HAVE TO BE ADJUSTED
V
+12V
open while driving VRT with an external voltage. This
allows similar functionality to #2 preceding, but the
bias voltage (code 0) will move when the full scale
range is changed.
ML6401 — Open pin 16, drive pin 17 externally, and
connect pin 22 to pin 23. The full scale range will be
2
1.5 volts (internally generated from bandgap). The full
scale range of the A/D must be kept below 4 volts, but
the part is only specified for full scale range of 2 volts.
IN
470 F
120
C1
47 F
R1
pin 17 volts, and the bias (code 128) will occur at
Circuit in dashed lines is an optional 1175 input
network which can be replaced with circuits in
Figure 1 or 2.
C6
+
+
180
R2
–12V
C5
0.1 F
1k
Q1
R4
R3
500
47 F
C3
Q2
+
+
R5
2k
10 F
C2
C4
0.1 F
Figure 3. Replacement for 1175.
R7*
5k
POT
100
5k
Q3
R8
R9
0.1 F
C12
75
R10
4. CXD1175 — Connect VRTS to VRT and leave VRBS
C8
0.1 F
47 F
open while driving VRB with an external voltage. This
allows similar functionality to #2 preceding, but the
bias voltage (code 0) will move when the full scale
range is changed.
ML6401 — Connect pin 16 to pin 17, open pin 22 and
drive pin 23 externally. The full scale range will be 2
volts (internally generated from bandgap), and the bias
(code 128) will occur at pin 23 2% volts.
47 F
C7
C9
+
+
0.1 F
C13
10pF
C11
C10
0.1 F
13
14
15
16
17
18
19
20
21
22
23
24
CLOCK IN
VDD
VDD
VDD
VRTS
VRT
VDD
VIN+
GND
GND
VRBS
VRB
GND
1175 PINOUT
D
A
A
A
A
A
D
+5V
GND
VDD
CLK
D7
D6
D5
D4
D3
D2
D1
D0
OE
HC04
O
O
ML6401
12
11
10
9
8
7
6
5
4
3
2
1
MSB
LSB
CLK
7