ML2340, ML2350
TYPICAL APPLICATIONS
(Continued)
+12V
V
CC
ML2340
V
OUT
V
REFIN
V
REFOUT
V
ZS
GAIN 0
AGND
GAIN 1
V
OUT
, GAIN 2
BIPOLAR
V
OUT
AROUND
4.5V
4.50V
256 CODES
9.0V
6.75V
256 CODES
4.5V
4.5V
5.625V
256 CODES
4.5V
3.375V
V
OUT
, GAIN 1/2
5.062V
4.5V 256 CODES
3.938V
V
OUT
, GAIN 1/4
2.25V
V
OUT
, GAIN 1
GND + 100mV
Figure 8. Single 12V Supply, Bipolar V
OUT
with 11-Bits Resolution Around 4.5V
+12V
+5V +12V
V
CC
ML2340
17
2
0.1µF
2
+12V
+5V
PWR VC
OUTPUT+
19
11
10
13
1Ω
16
XFER
DB0
V
REF OUT
20
V
REF IN
V
ZS
DB7
1
4
3
14
0.1µF
REF
PWR GND A
R
SENSE
ML4406
8
SERVO
COIL
MICRO-
CONTROLLER
18
19
V
OUT
GAIN 0
GAIN 1
AGND
DGND
5
6
CONTROL+
OUTPUT– 12
15
CONTROL–
9
PWR GND B
3
DISABLE
6
GND
20
1
5
POWERFAIL
RETRACT
HIGH/LOW
4
I(RET) SET
R(RET)
V(RET)
7
FROM
MOTOR
WINDINGS
Figure 9. Hard Disc Drive Servo Coil Driver Providing 13-Bit Effective Resolution
10
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
