Sony CXD2475TQ Reference voltage and driver ic for lcd Datasheet

CXD2475TQ
Reference Voltage and Driver IC for LCD
Description
The CXD2475TQ is suitable IC for applying reference
voltage for gamma correction which is necessary for
TFT liquid crystal display. This IC has a built-in 9
channels of rail-to-rail buffer circuit which enables 2input switch and a common driver circuit.
Features
• Built-in 9 channels of rail-to-rail buffer circuit
• Built-in common driver circuit
• Current consumption: 3.6mA (typ.)
• Package: 48pin TQFP
48 pin TQFP (Plastic)
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
VCC∗1
7.0
V
VVG∗2
7.0
V
∗
3
VVC
≤ VCC + 0.2
V
∗
4
VVG
≥ GND – 0.2
V
• Operating temperature
Topr
–25 to +85
°C
• Storage temperature
Tstg
–55 to +150
°C
• Allowable power dissipation (Ta ≤ 25°C)
Pd
1.72
W
• Reduced ratio (Ta < 25°C)
13.8
mW/°C
Structure
Bi-CMOS IC
Applications
Small liquid crystal monitor
Operating Conditions
• Supply voltage
VCC∗1
VVG∗2
VVC∗3
VVG∗4
∗1
∗2
∗3
∗4
4.5 to 5.0 to 5.5
4.0 to VCC
4.0 to VCC
0 to 1.0
V
V
V
V
Applied to Vcc – GND.
Applied to COMVcc – COMGND
Applied to COMVcc – GND
Applied to COMGND – GND
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E99617-PS
CXD2475TQ
NC
VL4
VH4
VL5
VH5
VL6
VH6
VL7
VH7
VL8
VH8
NC
Block Diagram
36
35
34
33
32
31
30
29
28
27
26
25
24 NC
NC 37
23 GND
GND 38
V6 39
22 V7
V5 40
21 V8
V4 41
20 NC
NC 42
19 Vcc
Vcc 43
18 V2
V1 44
17 V3
V0 45
16 GND
15 COMVcc
GND 46
buff
VH1
VL1
7
8
9
10
11
12
NC
6
COMGND
5
COMSW
4
SW
3
VL0
2
VH0
1
VL2
13 NC
VH2
NC 48
VL3
14 COMOUT
VH3
NC 47
–2–
CXD2475TQ
Pin Description
Pin
No.
Symbol
1
VH3
2
VL3
Pin voltage
Equivalent circuit
Description
DC input when SW is high.
Vcc
DC input when SW is low.
1
DC input when SW is high.
3
VH2
3
4
VL2
5
DC input when SW is low.
5
VH1
7
DC input when SW is high.
VH 26
DC input when SW is low.
6
VL1
7
VH0
30
DC input when SW is high.
8
VL0
32
DC input when SW is low.
28
34
26
VH8
27
VL8
28
VH7
4
DC input when SW is high.
29
VL7
6
DC input when SW is low.
DC input when SW is high.
0.2 to 4.8V
DC input when SW is low.
2
8
30
VH6
31
VL6
29
DC input when SW is low.
32
VH5
31
DC input when SW is high.
33
VL5
34
VH4
35
VL4
17
V3
18
V2
21
V8
22
V7
39
V6
DC input when SW is high.
VL 27
33
DC input when SW is low.
35
DC input when SW is high.
GND
DC input when SW is low.
Vcc
V3 output.
17
V2 output.
18
V8 output.
21
V7 output.
22
0.2 to 4.8V
39
V6 output.
40
40
V5
41
V5 output.
41
V4
44
V4 output.
45
44
45
V1 output.
V1
V0
GND
V0 output.
Vcc
9
Input switch.
VL is output for low; VH for high.
SW
9
10
10
COM output switch.
COMVcc level is output for low;
COMGND level for high.
COMSW
GND
–3–
CXD2475TQ
Pin
No.
Symbol
Pin voltage
11
COMGND
0 to 1.0V
14
COMOUT
Equivalent circuit
COMVcc
Description
COM output ground.
11
COM output.
COMOUT 14
15
15
COMVcc
4.0 to Vcc
COM power supply.
19
Vcc
5.0V
5V power supply.
43
Vcc
5.0V
5V power supply.
16
GND
GND.
23
GND
GND.
38
GND
GND.
46
GND
GND.
12
NC
No connected.
13
NC
No connected.
20
NC
No connected.
24
NC
No connected.
25
NC
No connected.
36
NC
No connected.
37
NC
No connected.
42
NC
No connected.
47
NC
No connected.
48
NC
No connected.
COMGND
Note)
• GND
Make sure that Pins 16, 23, 38 and 46 are connected to GND potential, and do not release them.
• Decoupling capacitor
Locate decoupling capacitor connected between power supply and GND as near IC pin as possible.
• Design VH and VL input pins not to have capacity.
–4–
CXD2475TQ
Electrical Characteristics
No.
Item
(Ta = 25°C, Vcc = COMVcc = 5V, COMGND = 0V)
Symbol
Condition
Min.
Typ.
Max.
Unit
1
Current consumption
(Vcc + COMVcc)
ICC
Input voltage = 2.5V
—
3.6
6.0
mA
2
VH, VL input current high
IIH
Input voltage = 4.8V
–0.1
—
0.1
µA
3
VH, VL input current low
IIL
Input voltage = 0.2V
–0.1
—
0.1
µA
4
SW, COMSW input current high IISH
Input voltage = 5V
–0.1
—
0.1
µA
5
SW, COMSW input current low
IISL
Input voltage = 0V
–0.4
—
0.1
µA
6
VREF voltage gain
AV
Input voltage = 0.2 to 4.8V
0.985
—
—
V/V
7
VREF output voltage high
VOH
ISOURCE = 10mA
Vcc – 0.2
—
—
V
8
VREF output voltage low
VOL
ISINK = 10mA
—
—
0.2
V
9
COMOUT output voltage high
VCOH
ISOURCE = 10mA
COMVcc
– 0.1
—
—
V
10
COMOUT output voltage low
VCOL
ISINK = 10mA
—
—
COMGND
+ 0.1
V
11
VREF offset voltage
VOFF
—
—
20
mV
12
VREF load regulation
∆VO
—
±5
±10
mV
13
SW, COMSW input voltage high VIH
2
—
—
V
14
SW, COMSW input voltage low
—
—
0.8
V
15
VREF transient time (1)
Measurement circuit 1
—
5
8
µs
16
VREF transient time (2)
Measurement circuit 2
—
3.5
6
µs
17
VREF propagation delay time
(1)
tpvLH1
Measurement circuit 1
—
3.5
6
µs
18
VREF propagation delay time
(2)
tpvLH2
Measurement circuit 2
—
2.5
5
µs
19
VREF propagation delay time
difference (1)
∆tpv1
tpvLH1 – tpvHL1
—
—
±1.6
µs
20
VREF propagation delay time
difference (2)
∆tpv2
tpvLH2 – tpvHL2
—
—
±0.8
µs
21
COM transient time
Measurement circuit 3
—
3
5
µs
22
COM propagation delay time
Measurement circuit 3
—
1.6
3
µs
23
COM propagation delay time
difference
tpcLH – tpcHL
—
—
±1
µs
Input voltage = 0.2 to 4.8V
ISOURCE = 10mA
ISINK = 10mA
VIL
ttvLH1
ttvHL1
ttvLH2
ttvHL2
tpvHL1
tpvHL2
ttcLH
ttcHL
tpcLH
tpcHL
∆tpc
–5–
CXD2475TQ
Measurement Circuits
Measurement circuit 1
VH
22Ω
4.8V
Measurement point
27nF
V0
0.2V
VL
Measurement circuit 2
VH
4.8V
Measurement point
V0
0.2V
VL
Measurement circuit 3
COMVcc
5.0V
22Ω
Measurement point
COMOUT
0V
27nF
COMGND
SW/COMSW
50%
tpLH
tpHL
90%
Output waveform
50%
50%
10%
ttLH
ttHL
–6–
CXD2475TQ
Application Circuit
47µ 0.01µ
36
35
34
33
32
31
30
29
28
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
5V
27
26
25
37
24
38
23
To LCD
39
22
To LCD
To LCD
40
21
To LCD
To LCD
41
20
42
19
43
18
To LCD
To LCD
44
17
To LCD
To LCD
45
16
46
15
47µ 0.01µ
4.5V
buff
47
14
48
13
1
2
3
4
5
6
7
8
9
10
11
To LCD (VCOM)
12
0.5V
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
47µ 0.01µ
Polarity inverted pulse
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
–7–
CXD2475TQ
Package Outline
Unit: mm
48PIN TQFP (PLASTIC)
9.0 ± 0.3
7.0 ± 0.2
36
1.1MAX
(1.0)
25
24
B
0.8 ± 0.3
37
A
13
48
12
b
0.15 M
0.10
S
(8.0 ± 0.15)
S
b=0.2 ± 0.08
0.5 ± 0.15
0.1 ± 0.1
0° to 10°
S
0.15 ± 0.05
1
0.5
DETAIL B : SOLDER
DETAIL A
PACKAGE STRUCTURE
PACKAGE MATERIAL
EPOXY RESIN
SONY CODE
TQFP-48P-L111
LEAD TREATMENT
SOLDER PLATING
EIAJ CODE
P-TQFP48-7x7-0.5
LEAD MATERIAL
42 ALLOY
PACKAGE WEIGHT
0.14g
JEDEC CODE
–8–
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