Gamma curve accuracy includes resistor matching and buffer errors, but excludes the regulator error.
∆V
OUT
is the shift from the desired output voltage under the specified current load.
3
Total error is the difference between the designed and actual output voltage divided by the actual regulator output voltage or full-scale voltage.
4
Total error includes regulator error, resistor string error, bias current effects, and buffer offset voltage.
Rev. 0 | Page 3 of 16
ADD8708
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage (V
DD
)
Input Voltage
Storage Temperature Range
Operating Temperature Range
1
Junction Temperature Range
Lead Temperature Range (Soldering, 60 sec)
ESD Tolerance (HBM)
ESD Tolerance (MM)
Rating
18 V
−0.5
V to V
DD
−65°C
to +150°C
−40°C
to +105°C
–65°C to +150°C
300°C
±1500 V
±200 V
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may
affect device reliability.
Table 3. Package Characteristics
Package Type
LFCSP (CP)
LQFP (ST)
θ
JA2
28.3
N/A
θ
JA3
47.7
74.57
Unit
°C/W
°C/W
1
2
See the Application Notes section.
θ
JA
for exposed pad soldered to JEDEC 4-layer board.
3
θ
JA
for exposed pad not soldered down.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. 0 | Page 4 of 16
ADD8708
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
V
OUT
18
V
OUT
17
V
OUT
16
V
OUT
15
V
OUT
14
V
OUT
13
V
OUT
12
38
48
47
46
45
44
43
42
41
40
39
37
36
35
34
33
32
REG
FB
GND
V
DD
V
REG OUT
V
IN
18
V
IN
17
V
IN
16
V
IN
15
V
IN
14
V
OUT
11
GND
V
DD
GND
V
DD
1
2
3
4
5
6
7
8
9
V
OUT
10
V
OUT
9
V
OUT
8
V
OUT
7
V
DD
GND
V
OUT
6
V
OUT
5
V
OUT
4
V
OUT
3
V
OUT
2
04614-002
ADD8708
TOP VIEW
(Not to Scale)
31
30
29
28
27
26
25
V
IN
13
10
V
IN
12
11
V
IN
11
12
13
14
15
16
17
18
19
20
21
22
23
24
V
OUT
1
V
IN
9
V
IN
8
V
IN
7
V
IN
6
V
IN
5
V
IN
4
V
IN
3
V
IN
2
V
IN
10
V
IN
1
GND
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
REG
FB
GND
V
DD
V
REG OUT
V
IN
18
V
IN
17
V
IN
16
V
IN
15
V
IN
14
V
IN
13
V
IN
12
V
IN
11
V
IN
10
V
IN
9
V
IN
8
V
IN
7
V
IN
6
V
IN
5
V
IN
4
V
IN
3
V
IN
2
V
IN
1
GND
V
DD
Description
Regulator Feedback. Compares a percentage of the regulator output to the internal 1.2 V voltage
reference. Internal resistors are used to program the desired regulator output voltage.
Ground. Normally 0 V.
Supply Voltage. Normally 16 V.
Regulator output voltage. Provides reference voltage to resistor string and is internally connected to
the top of the resistor string.
Buffer inputs. Normally floating.
1
Ground. Normally 0 V.
Supply Voltage. Normally 16 V.
1
External resistors can be added to modify the internal resistor string to change the gamma voltage. An external resistor calculator is available upon request from your
京公网安备 11010802033920号
EEWORLD
