DS3508E+ Maxim Integrated Products, DS3508E+ Datasheet

IC GAMMA BUFFER 8CH 20-TSSOP

DS3508E+

Manufacturer Part Number
DS3508E+
Description
IC GAMMA BUFFER 8CH 20-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS3508E+

Applications
TFT-LCD Panels: Gamma Buffer
Number Of Circuits
8
Current - Supply
2mA
Current - Output / Channel
6mA
Voltage - Supply, Single/dual (±)
9 V ~ 15.5 V
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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 V
Programming occurs through an I
interface with support for speeds up to 400kHz.
Rev 1; 3/08
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.
MASTER
I
2
C
TFT-LCD Gamma Buffer
Industrial Controls
5.0V
I
2
C, 8-Channel Gamma Buffer with EEPROM
Typical Operating Circuit
V
SDA
SCL
A0
GND
CC
________________________________________________________________ Maxim Integrated Products
15.0V
V
DD
DS3508
General Description
14.8V
VHH
0.2V
VLL
VHM
VLM
8.0V
7.0V
GM1
GM2
GM3
GM4
GM5
GM6
GM7
GM8
2
Applications
C-compatible serial
8
DD
LIQUID-CRYSTAL
SOURCE DRIVER
DISPLAY
supply.
♦ 8-Bit Gamma DACs, 8 Channels
♦ 1 Byte EEPROM and 1 Byte SRAM per Channel
♦ Ultra-Low Power (2mA I
♦ 400kbps I
♦ 9.0V to 15.5V Analog Supply
♦ 2.7V to 5.5V Digital Supply
♦ 20-Pin TSSOP Package
♦ Address Pin Allows Two DS3508s to Reside on
+ Denotes a lead-free package.
T&R = Tape and reel.
DS3508E+
DS3508E+T&R
the Same I
PART
VHM
GND
VHH
VLM
SDA
N.C.
SCL
V
VLL
2
TOP VIEW
A0
DD
C Interface
2
C Bus
10
1
2
3
4
5
6
7
8
9
-45°C to +95°C
-45°C to +95°C
TEMP RANGE
Ordering Information
DS3508
TSSOP
DD
Pin Configuration
, typ)
20
19
18
17
16
15
14
13
12
11
PIN-PACKAGE
20 TSSOP
20 TSSOP
V
GM1
GM2
GM3
GM4
GM5
GM6
GM7
GM8
N.C.
Features
CC
1

Related parts for DS3508E+

DS3508E+ Summary of contents

Page 1

... Analog Supply ♦ 2.7V to 5.5V Digital Supply ♦ 20-Pin TSSOP Package supply. DD ♦ Address Pin Allows Two DS3508s to Reside on C-compatible serial the Same I Applications PART DS3508E+ DS3508E+T&R + Denotes a lead-free package. T&R = Tape and reel. 8 SOURCE DRIVER LIQUID-CRYSTAL DISPLAY Features , typ ...

Page 2

I C, 8-Channel Gamma Buffer with EEPROM ABSOLUTE MAXIMUM RATINGS Voltage Range on V and DD 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 V ...

Page 3

I C, 8-Channel Gamma Buffer with EEPROM OUTPUT ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V 15.5V PARAMETER SYMBOL Gamma DAC Resolution Integral Nonlinearity Error Differential Nonlinearity Error Output Voltage Range: GM1–GM4 Output Voltage ...

Page 4

I C, 8-Channel Gamma Buffer with EEPROM ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V -45°C to +95°C, timing referenced PARAMETER SYMBOL SDA Output Low Voltage Input Capacitance on A0, ...

Page 5

I C, 8-Channel Gamma Buffer with EEPROM (V = 15.0V 5.0V +25°C, unless otherwise noted ANALOG SUPPLY CURRENT vs. TEMPERATURE 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -45 -25 -5 ...

Page 6

I C, 8-Channel Gamma Buffer with EEPROM VHH SDA SCL INTERFACE A0 CONTROL LOGIC CONTROL REGISTERS VHM VLM VLL GND 6 _______________________________________________________________________________________ Functional Diagram 8-BIT SRAM 1 DAC ...

Page 7

I C, 8-Channel Gamma Buffer with EEPROM PIN NAME TYPE 1 SCL Input Input/ 2 SDA Output 3 GND Ground 4 A0 Input Reference 5 VHH Input Reference 6 VHM Input Reference 7 VLM Input Reference 8 VLL Input ...

Page 8

I C, 8-Channel Gamma Buffer with EEPROM On power-up, the gamma data that is stored in each channel’s EEPROM register is loaded into the corre- sponding SRAM registers. The volatile CR register pow- ers up as 00h, setting the ...

Page 9

I C, 8-Channel Gamma Buffer with EEPROM Table 1. DAC Voltage/Data Relationship for Selected Codes DATA (BINARY) 0000 0000 0000 0001 0000 0010 0000 0011 0000 1111 0011 1111 0111 1111 1111 1101 1111 1110 1111 1111 MSB 1 ...

Page 10

I C, 8-Channel Gamma Buffer with EEPROM Memory Organization Memory Description The list of registers/memory contained in the DS3508 is shown in the memory map (Table 2). Each of the GMx Table 2. Memory Map NAME GM1 GM2 GM3 ...

Page 11

I C, 8-Channel Gamma Buffer with EEPROM Serial Interface Description The following terminology is commonly used to describe data transfers. (See Figure 4 and the I Characteristics table for additional information.) Master device: ...

Page 12

I C, 8-Channel Gamma Buffer with EEPROM Byte read: A byte read is an 8-bit information transfer from the slave to the master plus a 1-bit ACK or NACK from the master to the slave. The 8 bits of ...

Page 13

I C, 8-Channel Gamma Buffer with EEPROM 2 TYPICAL I C WRITE TRANSACTION MSB LSB START R/W READ/ SLAVE WRITE ADDRESS* 2 EXAMPLE I C TRANSACTIONS (WHEN A0 IS CONNECTED TO GND) ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products DESCRIPTION = +25° ...

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