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Maxim Integrated Semiconductor Electronic Components Datasheet

DS3508 Datasheet

8-Channel Gamma Buffer

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Rev 1; 3/08
I2C, 8-Channel Gamma Buffer with EEPROM
General Description
The DS3508 is a programmable 8-channel gamma volt-
age generator with one byte of on-chip EEPROM and
one byte of SRAM memory per channel. Each channel
is composed of an independent 8-bit DAC with an asso-
ciated EEPROM/SRAM pair. At power-up, nonvolatile
(NV) EEPROM gamma data is loaded into its corre-
sponding SRAM register that drives the associated 8-bit
DAC. An on-chip control register allows selectable con-
trol of writing to SRAM/EEPROM or SRAM only.
The DS3508 is designed for low-power operation and
draws less than 2mA (typ) from the VDD supply.
Programming occurs through an I2C-compatible serial
interface with support for speeds up to 400kHz.
TFT-LCD Gamma Buffer
Industrial Controls
Applications
Typical Operating Circuit
Features
o 8-Bit Gamma DACs, 8 Channels
o 1 Byte EEPROM and 1 Byte SRAM per Channel
o Ultra-Low Power (2mA IDD, typ)
o 400kbps I2C Interface
o 9.0V to 15.5V Analog Supply
o 2.7V to 5.5V Digital Supply
o 20-Pin TSSOP Package
o Address Pin Allows Two DS3508s to Reside on
the Same I2C Bus
Ordering Information
PART
TEMP RANGE
DS3508E+
-45°C to +95°C
DS3508E+T&R
-45°C to +95°C
+Denotes a lead-free package.
T&R = Tape and reel.
PIN-PACKAGE
20 TSSOP
20 TSSOP
Pin Configuration
TOP VIEW
5.0V
I2C
MASTER
15.0V
14.8V 8.0V
VCC VDD
SDA
SCL
A0
GND
VHH VHM
GM1
GM2
GM3
GM4
DS3508
VLL
GM5
GM6
GM7
GM8
VLM
0.2V 7.0V
8
SOURCE DRIVER
LIQUID-CRYSTAL
DISPLAY
SCL 1
SDA 2
GND 3
A0 4
VHH 5
VHM 6
VLM 7
VLL 8
VDD 9
N.C. 10
DS3508
TSSOP
20 VCC
19 GM1
18 GM2
17 GM3
16 GM4
15 GM5
14 GM6
13 GM7
12 GM8
11 N.C.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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Maxim Integrated Semiconductor Electronic Components Datasheet

DS3508 Datasheet

8-Channel Gamma Buffer

No Preview Available !

I2C, 8-Channel Gamma Buffer with EEPROM
ABSOLUTE MAXIMUM RATINGS
Voltage Range on VDD and
VHH Relative to GND ..........................................-0.5V to +16V
Voltage Range on VHM, VLM, and
VLL Relative to GND............................................-0.5V to +12V
Voltage Range on VCC, SDA, SCL, and
A0 Relative to GND ............................................-0.5V to +6.0V
Junction Temperature ......................................................+125°C
Operating Temperature Range ...........................-45°C to +95°C
Programming Temperature Range .........................0°C to +70°C
Storage Temperature ..........................................55°C to +125°C
Soldering Temperature ..............................................Refer to the
IPC/JEDEC J-STD-020 Specification.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
(TA = -45°C to +95°C)
PARAMETER
Analog Supply Voltage
VHH, VHM
VLM, VLL
VHH–VHM and VLM–VLL
Digital Voltage Supply
Input Logic 0 (A0, SDA, SCL)
Input Logic 1 (A0, SDA, SCL)
SYMBOL
VDD
VREF
VCC
VIL
VIH
CONDITIONS
(Note 1)
Applies to GM1–GM4
Applies to GM5–GM8
(Note 1)
MIN TYP MAX
+9.0
+15.5
VDD/2 - 1
0.2
3.0
VDD - 0.2
VDD/2 + 1
2.7 5.5
0.7 x VCC
0.3 x VCC
UNITS
V
V
V
V
V
V
V
INPUT ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, TA = -45°C to +95°C.)
PARAMETER
Analog Supply Current
Digital Supply Current, NV Read
or Write
Digital Supply Standby Current
Input Leakage
(SDA, SCL, A0)
SYMBOL
CONDITIONS
IDD VDD = 15.5V (Note 2)
ICC fSCL = 400kHz
ISTBY VCC = 5.5V (Note 3)
IIL VCC = 5.5V
Input Resistance at VHH, VHM,
VLM, VLL
RIN
MIN TYP MAX UNITS
2 4 mA
0.2 1.0 mA
2 10 µA
-1 +1 µA
1 M
2 _______________________________________________________________________________________
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Part Number DS3508
Description 8-Channel Gamma Buffer
Maker Maxim
PDF Download

DS3508 Datasheet PDF






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