TZA1046 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TZA1046

Photodiode and amplifier IC for CD and DVD applications

Philips Electronics 

Philips Semiconductors

Photodiode and amplifier IC

for CD and DVD applications

Preliminary specification

TZA1046

12.2 Test mode description

Alignment of the diodes during OPU manufacturing requires the availability of all satellite outputs. In normal mode the

F and H channels are combined to a single output FH and the E and G channels are combined to a single output EG.

This is done to switch off two channels in the normal mode (application usage) which saves power consumption. For

alignment of the diodes each individual satellite output must be available and therefore the TZA1046 can be put in a test

mode where all satellite channels are available. The test mode is activated by pulling the R/W digital input pin above the

supply (2 to 2.5 V higher than VDD1), by forcing an input current into this pin (800 to 1200 µA) or by leaving the pin

open-circuit. Fig.7 shows the R/W input configuration.

handbook, full pagewidth

VDD2

3

VDD1

14

1 kΩ

350

kΩ

11

R/W input

GND

150

kΩ

6

300

kΩ

100

kΩ

100

kΩ

6 kΩ

1

+1

100 Ω

8-channel

test mode

+1

1

1

1

R/W internal

40 kΩ

Fig.7 R/W input configuration.

MDB576

2004 May 04

18

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