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ISL24211IRTZ-T13

P1-P3P4-P6P7-P9P10-P12
ISL24211
4
FN7585.0
February 23, 2011
Absolute Maximum Ratings Thermal Information
Supply Voltage
AV
DD
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
V
DD
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4V
Input Voltage with respect to Ground
SET, IN
N
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4V
SCL, SDA and WP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..V
DD
+ 0.3V
Output Voltage with respect to Ground
DVR_OUT, VCOM_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AV
DD
Continuous Output Current
DVR_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
VCOM_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100mA
ESD Ratings
Human Body Model (Tested per JESD22-A114) . . . . . . . . . . . . . . . . . 7kV
Machine Model (Tested per JESD22-A115). . . . . . . . . . . . . . . . . . . . 300V
Charged Device Model (Tested per JESD22-C101). . . . . . . . . . . . . . . 2kV
Latch Up (Tested per JESD 78, Class II, Level A). . . . . . . . . . . . . . . . 100mA
Thermal Resistance (Typical) θ
JA
(°C/W) θ
JC
(°C/W)
10 Ld TDFN Package (Notes 4, 5) . . . . . . . 53 11
Moisture Sensitivity (see Technical Brief TB363
)
All Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1
Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Operating Range
AV
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 19V
V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.25V to 3.6V
Ambient Operating Temperature . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. θ
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
5. For θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Test Conditions: V
DD
= 3.3V, AV
DD
= 18V, R
SET
= 5kΩ, R
1
= 10kΩ, R
2
= 10kΩ, (See Figure 5), V
COM_OUT
pin
connected to IN
N
, unless otherwise specified. Typicals are at T
A
= +25°C. Boldface limits apply over the operating temperature range,
-40°C to +85°C.
SYMBOL PARAMETER TEST CONDITIONS
MIN
(Note 6) TYP
MAX
(Note 6) UNITS
DC CHARACTERISTICS
V
DD
V
DD
Supply Range - Operating 2.25 3.6 V
AV
DD
AV
DD
Supply Range Supporting EEPROM Programming 10.8 19 V
AV
DD
AV
DD
Supply Range for Wide-Supply Operation
(not supporting EEPROM Programming)
4.5 19 V
I
DD
V
DD
Supply Current WP = SCL = SDA = V
DD
95 300 µA
I
AVDD
AV
DD
Supply Current WP = SCL = SDA = V
DD
3.8 6.5 mA
DVR_OUT CHARACTERISTICS
ZSE
SET
SET Zero-Scale Error ±3 LSB
FSE
SET
SET Full-Scale Error ±8 LSB
TCV
SET
SET Voltage Drift 7µV/°C
V
DVR_OUT
DVR_OUT Voltage Range I
DVR_OUT
< 0.5mA V
SET
+ 0.4 AV
DD
V
I
DVR_OUT
Maximum DVR_OUT Sink Current 4 mA
INL Integral Non-Linearity ±2 LSB
DNL Differential Non-Linearity ±1 LSB
OUTPUT AMPLIFIER CHARACTERISTICS
V
OS
Input Offset Voltage ±2 ±15 mV
TCV
OS
Input Offset Voltage Drift -6.3 µV/°C
I
B
Input Bias Current 0.001 ±1 µA
CMRR Common-Mode Rejection Ratio 55 75 dB
PSRR Power Supply Rejection Ratio 60 82 dB
A
VOL
Open Loop Gain 55 75 dB
V
OL
Output Swing Low I
L
= -5mA 50 150 mV
ISL24211
5
FN7585.0
February 23, 2011
V
OH
Output Swing High I
L
= 5mA 17.85 17.9 V
I
SC
Short Circuit Current (Sinking) 300 430 mA
Short Circuit Current (Sourcing) 450 555 mA
SR Slew Rate (Rising) 1kΩ || 8pF Load 70 116 V/µs
Slew Rate (Falling) 1kΩ || 8pF Load 50 93 V/µs
t
S
Settling Time to 0.2% 150 ns
BW -3dB Bandwidth 60 MHz
I
2
C INPUTS AND OUTPUT
V
IH_I2C
SDA, SCL Logic 1 Input Voltage 1.44 V
V
IL_I2C
SDA, SCL Logic 0 Input Voltage 0.55 V
V
HYS_I2C
SDA, SCL Hysteresis 260 mV
I
L_I2C
SDA, SCL Input Leakage Current ±1 µA
V
OL_I2C
SDA Output Logic Low I = -3mA 0.4 V
V
IH_WP
WP Input Logic High 0.7V
DD
V
V
IL_WP
WP Input Logic Low 0.3V
DD
V
V
HYS_WP
WP Input Hysteresis 260 mV
I
L_WP
WP Input Leakage Current -0.20 -0.5 -1 µA
I
2
C TIMING
f
CLK
I
2
C Clock Frequency 400 kHz
t
SCH
I
2
C Clock High Time 0.6 µs
t
SCL
I
2
C Clock Low Time 1.3 µs
t
DSP
I
2
C Spike Rejection Filter Pulse Width 050ns
t
SDS
I
2
C Data Set Up Time 250 ns
t
SDH
I
2
C Data Hold Time 250 ns
t
BUF
I
2
C Time Between Stop and Start 200 µs
t
STS
I
2
C Repeated Start Condition Set-up 0.6 µs
t
STH
I
2
C Repeated Start Condition Hold 0.6 µs
t
SPS
I
2
C Stop Condition Set-up 0.6 µs
C
SDA
SDA Pin Capacitance 10 pF
C
SCL
SCL Pin Capacitance 10 pF
t
WR
EEPROM Write Cycle Time 100 ms
NOTE:
6. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
Electrical Specifications Test Conditions: V
DD
= 3.3V, AV
DD
= 18V, R
SET
= 5kΩ, R
1
= 10kΩ, R
2
= 10kΩ, (See Figure 5), V
COM_OUT
pin
connected to IN
N
, unless otherwise specified. Typicals are at T
A
= +25°C. Boldface limits apply over the operating temperature range,
-40°C to +85°C.
(Continued)
SYMBOL PARAMETER TEST CONDITIONS
MIN
(Note 6) TYP
MAX
(Note 6) UNITS
ISL24211
6
FN7585.0
February 23, 2011
Application Information
LCD panels have a V
COM
(common voltage) that must be precisely
set to minimize flicker. Figure 3 shows a typical V
COM
adjustment
circuit using a mechanical potentiometer, and the equivalent
circuit replacement using the ISL24211. Having a digital I
2
C
interface enables automatic, digital flicker minimization during
production test and alignment. After programming, the I
2
C
interface has no further use therefore, the ISL24211 automatically
powers up with the correct V
COM
voltage programmed previously.
The ISL24211 uses a digitally controllable potentiometer (DCP),
with 256 steps of resolution (see Figure 4) to change the current
drawn at the DVR_OUT pin, which then changes the voltage
created by the R
1
to R
2
resistor divider (see Figure 5). The
DVR_OUT voltage is then buffered by A2 to generate a buffered
output voltage at the V
COM_OUT
pin, capable of directly driving the
V
COM
input of an LCD panel. The amount of current sunk is
controlled by the setting of the DCP, which is recalled at power-up
from the ISL24211’s internal EEPROM. The EEPROM is typically
programmed during panel manufacture. As noted in the
Electrical Specifications on page 4, the ISL24211 requires a
minimum AV
DD
voltage of 10.8V for EEPROM programming, but
will work in normal operation (with no EEPROM programming)
down to 4.5V.
DCP (Digitally Controllable Potentiometer)
The DCP controls the voltage that ultimately controls the SET
current. Figure 4 shows the relationship between the register
value and the DCP’s tap position. Note that a register value of 0
selects the first step of the resistor string. The output voltage of
the DCP is given in Equation 1:
Output Current Sink
Figure 5 shows the schematic of the DVR_OUT current sink. The
combination of amplifier A1, transistor Q1, and resistor R
SET
forms a voltage-controlled current source, with the voltage
determined by the DCP setting.
The external R
SET
resistor sets the full-scale (maximum) sink current
that can be pulled from the DVR_OUT node. The relationship
between I
DVR_OUT
and Register Value is shown in Equation 2.
FIGURE 3. MECHANICAL ADJUSTMENT REPLACEMENT
DVR_OUT
SET
ISL24211
R
1
R
2
AV
DD
AV
DD
V
COM
I
OUT
V
DD
R
SET
R
A
R
C
AV
DD
V
COM
R
B
R
1
= R
A
R
2
= R
B
+R
C
R
SET
= R
A
R
B
+ R
A
R
C
20R
B
IN
N
VCOM_OUT
V
DCP
RegisterValue 1+
256
---------------------------------------------------
⎝⎠
⎛⎞
AV
DD
20
--------------
⎝⎠
⎛⎞
=
(EQ. 1)
FIGURE 4. SIMPLIFIED SCHEMATIC OF DCP
AV
DD
19R
R
0
1
2
255
254
253
252
251
REGISTER
VALUE
AV
DD
20
V
DCP
FIGURE 5. CURRENT SINK CIRCUIT
AV
DD
R
SET
V
DCP
SET
DVR_OUT
AV
DD
I
OUT
R
1
R
2
V
SAT
V
SET
= V
DCP
= I
OUT
* R
SET
Q1
A1
V
OUT
VCOM_OUT
IN
N
GND
A2
I
DVR_OUT
I
DVROUT
V
DCP
R
SET
-------------
RegisterValue 1+
256
---------------------------------------------------
⎝⎠
⎛⎞
AV
DD
20
--------------
⎝⎠
⎛⎞
1
R
SET
-------------
⎝⎠
⎛⎞
==
(EQ. 2)
P1-P3P4-P6P7-P9P10-P12

ISL24211IRTZ-T13

Mfr. #:
Buy ISL24211IRTZ-T13
Manufacturer:
Renesas / Intersil
Description:
LCD Gamma Buffers ISL24211IRTZFREE VCO M DRVR + VCOM CLBTR
Lifecycle:
New from this manufacturer.
Delivery:
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