Datasheet

THS7347
SLOS531B –MAY 2007– REVISED OCTOBER 2011 www.ti.com
TERMINAL FUNCTIONS (continued)
TERMINAL
I/O DESCRIPTION
NAME NO.
H-SYNC, INPUT B 10 I Horizontal Sync, Input B
V-SYNC, INPUT B 11 I Vertical Sync, Input B
I
2
C Slave Address Control Bit A1. Connect to V
DD
for a logic 1 preset value or GND for a logic 0 preset
17 I
I
2
C, A1
value.
I
2
C Slave Address Control Bit A0. Connect to V
DD
for a logic 1 preset value or GND for a logic 0 preset
18 I
I
2
C, A0
value.
Serial data line of the I
2
C bus. Pull-up resistor should have a minimum value = 2 kΩ and a maximum value
SDA 19 I/O
= 19 kΩ. Pull up to V
DD
.
I
2
C bus clock line. Pull-up resistor should have a minimum value = 2 kΩ and a maximum value = 19 -kΩ.
SCL 20 I
Pull up to V
DD
.
Power-Up Condition. Connect to GND for all channels disabled upon power-up. Connect to V
DD
(logic
PUC 21 I high) to set buffer outputs to OFF and monitor outputs ON with ac-bias configuration on Channels 1 to 3
and both H-Sync/V-Sync enabled.
Sets the MUX configuration control. Connect to logic low for MUX Select (pin 16) control of the MUX.
MUX MODE 15 I
Connect to logic high for I
2
C control of the MUX.
Controls the MUX selection when MUX MODE (pin 15) is set to logic low. Connect to logic low for MUX
MUX SELECT 16 I
selector set to Input A. Connect to logic high for MUX selector set to Input B.
Output Channel 1 from either CH. 1, INPUT A or CH. 1, INPUT B. Connect to ADC/Scalar/Decoder. Both
CH. 1, BUFFER OUTPUT 35, 36 O
pins should be connected together on the PCB.
Output Channel 2 from either CH. 2, INPUT A or CH. 2, INPUT B. Connect to ADC/Scalar/Decoder. Both
CH. 2, BUFFER OUTPUT 31, 32 O
pins should be connected together on the PCB.
Output Channel 3 from either CH. 3, INPUT A or CH. 3, INPUT B. Connect to ADC/Scalar/Decoder. Both
CH. 3, BUFFER OUTPUT 27, 28 O
pins should be connected together on the PCB.
H-SYNC BUFFER
25 O Horizontal Sync Buffer Output. Connect to ADC/Scalar H-sync input.
OUTPUT
V-SYNC BUFFER
24 O Vertical Sync Buffer Output. Connect to ADC/Scalar V-sync input.
OUTPUT
Video Monitor Pass-Through Output Channel 1 SAG Correction pin. If SAG is not used, connect Directly to
CH. 1, SAG 45 O
CH. 1, OUTPUT pin 46.
CH. 1, MONITOR
46 O Video Monitor Pass-Through Output Channel 1 from either CH. 1, INPUT A or CH. 1, INPUT B.
OUTPUT
Video Monitor Pass-Through Output Channel 2 SAG Correction pin. If SAG is not used, connect Directly to
CH. 2, SAG 43 O
CH. 2, OUTPUT pin 44.
CH. 2, MONITOR
44 O Video Monitor Pass-Through Output Channel 2 from either CH. 2, INPUT A or CH. 2, INPUT B.
OUTPUT
Video Monitor Pass-Through Output Channel 3 SAG Correction pin. If SAG is not used, connect Directly to
CH. 3, SAG 41 O
CH. 3, OUTPUT pin 42.
CH. 3, MONITOR
42 O Video Monitor Pass-Through Output Channel 3 from either CH. 3, INPUT A or CH. 3, INPUT B.
OUTPUT
H-SYNC MONITOR
40 O Horizontal Sync Monitor Pass-Through Output.
OUTPUT
V-SYNC MONITOR
39 O Vertical Sync Monitor Pass-Through Output.
OUTPUT
6, 12, 13, 26, Ground Reference pin for analog signals. Internally, these pins connect to DGND, although it is
AGND I
30, 34, 37, 47 recommended to have the AGND and DGND connected to the proper signals for best results.
+V
A
29, 33, 38, 48 I Analog Positive Power Supply Input pins. Connect to 2.7 V to 5 V. Must be equal to or greater than VDD.
V
DD
22 I
Digital Positive Supply pin for I
2
C circuitry and H-Sync/V-Sync outputs. Connect to 2.7 V to 5 V.
DGND 23 I
Digital GND pin for HV circuitry and I
2
C circuitry.
Defaults to 1.45 V (TTL compatible). Connect to external voltage reference to adjust H-Sync/V-Sync input
Schmitt Trigger Adjust 14 I
thresholds from 0.9 V to 2 V range.
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