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零件编号 | ADD8502 | ||
描述 | Integrated LCD Grayscale Generator | ||
制造商 | Analog Devices | ||
LOGO | |||
1 Page
a
Integrated LCD
Grayscale Generator
ADD8502
FEATURES
Two Mask Programmable Sets of Five Reference Levels
Dual 10-Bit DACs for Flicker Offset and Range Adjustment
Integrated VCOM Switching
Single-Supply Operation: 5.0 V
Low Supply Current: 300 A
Global Power Save Mode: 1 A Max
Fast Settling Time for Load Change: 20 s
Stable with 20 nF/100 ⍀ Loads
CMOS/TTL Input Levels
APPLICATIONS
Color TFT Cell Phones
Color TFT PDAs
GENERAL DESCRIPTION
The ADD8502 is an integrated, high accuracy, programmable
grayscale generator. Two sets of five output reference voltages
are mask programmed to 0.2% resolution. The outputs switch
between the two sets of five levels. The reference levels are selected
from a 512 tap resistor network using a via mask.
ADD8502 includes two serially addressable, 10-bit digital-to-
analog converters (DACs) and five fast, low current buffers.
The dual DACs set the endpoint voltages applied to the resistor
network to adjust for flicker and range. The two power save modes
can reduce the total current to less than 1 µA and feature fast
recovery time from Shutdown/Sleep Mode. The ADD8502
accepts CMOS or TTL inputs for all controls, including the
common drive circuit levels.
ADD8502 operates over the industrial temperature range from
–40°C to +85°C and is available in a space-saving 24-lead
4 mm ϫ 4 mm frame chip scale package.
FUNCTIONAL BLOCK DIAGRAM
REV2
VDD
VREF+
VDD/2
10-BIT
DAC A
VREF–
VL
VP0
VN0
R
R VP0
R
VN4
A0
A1
SCK
DIN
CS-LD
DIGITAL
CORE
POWER
SAVE
LOGIC
PSK
GS1
GS2
VDD/2
VREF+
10-BIT
DAC B
VREF–
MUX
VP4
VN4
R
VP4
R
VN0
R
R
VDD
A2
A3
A4
VCOM
LOGIC
VDD
GND
V0
V1
V2
V3
V4
COM
COM_M
REV1 CM CV4
sheet4u.comREV. 0
taInformation furnished by Analog Devices is believed to be accurate and
areliable. However, no responsibility is assumed by Analog Devices for its
.duse, nor for any infringements of patents or other rights of third parties
that may result from its use. No license is granted by implication or
wwwotherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
ADD8502
350
300
250
200
150
100
23 4 5
VDD – V
67
TPC 7. System Supply Current at Full Power
400
350
300
250
200
150
100
50
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
VDD – V
TPC 8. System Supply Current at Shutdown
28
VDD = 5V
27
26
25
24
23
22
21
20
19
18
؊40
25
TEMPERATURE – ؇C
85
TPC 9. Shutdown Recovery Time vs. Temperature
10.0
9.5
VDD = 5V
9.0
8.5
8.0
7.5
7.0
؊40
25
TEMPERATURE – ؇C
85
TPC 10. Sleep Recovery Time vs. Temperature
10
8
6
4
2
0
؊2
؊40
VDD = 5V
25
TEMPERATURE – ؇C
TPC 11. Output Leakage
85
0
VDD = 5V
0
0
REV2
0
0
0
V0
0
0
0
00 0000 00000
TIME – 10s/DIV
TPC 12. V0 Output Swing Response to REV2
–8– REV. 0
ADD8502
OUTLINE DIMENSIONS
24-Lead Frame Chip Scale Package [LFCSP]
4x4 mm Body
(CP-24)
4.0
BSC SQ
0.60 MAX
PIN 1
INDICATOR
TOP
VIEW
3.75
BSC SQ
0.50
BSC
0.50
0.40
0.30
1.00
0.90
0.85
12؇ MAX
0.70 MAX
0.65 NOM
0.05 MAX
0.02 NOM
0.25
REF
SEATING
PLANE
0.30
0.23
0.18
COPLANARITY
0.08
0.60 MAX
0.25
MIN
19 24 1
18
PIN 1
INDICATOR
BOTTOM
VIEW
13 6
12 7
2.50
REF
2.25
1.70
0.75
COMPLIANT TO JEDEC STANDARDS MO-220-VGGD-2
–16–
REV. 0
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页数 | 16 页 | ||
下载 | [ ADD8502.PDF 数据手册 ] |
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