DS3508 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – I2C, 8-Channel Gamma Buffer with EEPROM

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
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