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STV2145

I2C BUS CONTROLLED EAST-WEST AND VERTICAL INTERFACE

STMicroelectronics 

STV2145

ELECTRICAL CHARACTERISTICS (continued) (VCC = 7.8V, Tamb = 25°C, unless otherwise specified)

Symbol

Parameter

Test Conditions

VERTICAL DEFLECTION (continued)

VERTICAL RAMP GENERATOR (see Figure 2) (see Note 6)

VSAW

Sawtooth Amplitude

Min. Value

Max. Value

S_CORRECTION = 1111

Register V_AMPLITUDE

= minimum (0000000) value VPP for 190 lines

difference

= maximum (1111111) value VPP for 190 lines

difference

VMID

Sawtooth DC-Level

Nom. Value

Min. Value

Max. Value

SUB_TITLE = 0

Register V_DC = (10000) ; (no V-shift)

Register V_DC = (00000) ; (UP-shift)

Register V_DC = (11111) ; (DOWN-shift)

V_SUBTITLE (see Note 7)

SUB_TITLE Vertical DC-Shift

for Subtitle Mode

Register SUB_TITLE = 1 (this value affects a

vertical UP-shift of about 20 lines)

VERTICAL S-CORRECTION (see Figure 3) (See Notes 4 and 5)

TFMID

Middle Fix Point

50Hz Mode ; measurement method : difference

SCOMAX - SCOMIN is measured at line 160 and

174 ; the middle line TFMID is calculated by linear

interpolation (for 60Hz , the middle line shifts to

line 140 ; not measured)

∆VFUP

∆VFLOW

Fix-Point

Upper at line 72

Lower at line 262

50Hz Mode

Difference ∆VFUP = SCOMAX - SCOMIN measured

at line 72 if V_AMPLITUDE = (1111111)

Difference ∆VFLOW = SCOMAX - SCOMIN measured

at line 262 if V_AMPLITUDE = (1111111)

∆VSAWMAX

Maximum Correction

Voltage

at line 127

at line 207

50Hz Mode

Difference ∆VFUP = SCOMAX - SCOMIN measured

at line 127 if V_AMPLITUDE = (1111111)

Difference ∆VFLOW = SCOMAX - SCOMIN measured

at line 207 if V_AMPLITUDE = (1111111)

VERTICAL BREATHING (Pin 9) (Breathing effect BR = 100% * (VSAW - VSAWB) / VSAW)

(see Notes 4 and 5) (see Figure 4)

BRMin

BRMax

Breathing Effect

Min. Value

Max. Value

V9 = 7.8V

V9 = 1.5V measurement at line 72 and 262

VERTICAL BRIDGE AND OUTPUT STAGE (see Figure 5)

Sense Input Voltage

Min. Value

Max. Value

Input Pins 16 and 15 - Differential input

(see Note 2)

V14 ≤ 3V

V14 ≤ 5V

Input Impedance

(Pins 15-16)

Resistor value of the internal resistor-bridge

IOUT

VOUT

∆IOUT /∆VIN

Output Current

(Pin 14)

Output Voltage

(Pin 14)

Min. Value

Max. Value

Transconductance

(Pin 14)

V14 = 3V, V16 and V15 > 10V

V16 > 10V

Input voltage ∆VIN = difference voltage between

Pin 16 and Pin 15

Min. Typ. Max.

0.38 0.46 0.55

1.11 1.16 1.21

0

55 65 75

-75 -65 -55

70 90 110

157 167 177

0

20 40 60

-60 -40 -20

0

5.3

10

20

15

±100

1

5

0.5

Unit

V

V

mV

mV

mV

line

mV

mV

%

%

V

V

kΩ

µA

V

V

mA/V

Notes : 2.

4.

5.

6.

7.

Parameter is not tested during production, but it is guaranteed by the design and qualified by means of corner lots.

Parameter is measured in EWS, with limits enlarged due to tester accuracy

Vertical output signals like vertical sawtooth, breathing and S-correction can only be measured via external test circuit (see

Figure 10).

Voltage VSAW only indirectly measurable via application circuit in closed loop condition (voltage-drop across RSENS) for all vertical

functions : see Note 5.

DC-shift of internal sawtooth-voltage; thus maintenance of fix-points for EW-Parabola and S-CORRECTION

9/17

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