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