TZA1045 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TZA1045

Photodiode and amplifier IC for CD and DVD applications

Philips Electronics 

Philips Semiconductors

Photodiode and amplifier IC for

CD and DVD applications

Preliminary specification

TZA1045

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX. UNIT

sCD-ROM output current sensitivity reading; λ = 785 nm; note 11

for CD-ROM

Io(cen)

−

Io(sat)

−

Io(RFP), Io(RFN)

−

86.4

−

346

−

32.4

−

A/W

A/W

A/W

Notes

1. The supplies are connected internally by diodes. Differences between the supply voltages should not exceed 0.3 V.

2. Estimated average power consumption (typical value):

P = VDD × (1.4 × Io(av) × 9 + IDD1 + IDD2) where Io(av) is the average output current.

Conditions: VDD = VDD1 = VDD2 and Io < 8 mA.

3. Outputs A, B, C, and D: Io = 1 mA output current. Definition of matching: (---I--A----I+--o---(I-m-B---a--+-x--)--I-–C----I-+-o---(-Im--D--i-n-)--)-×-----14---- – Vref × I(o)av where

Vref = Vref1 = Vref2 (see Fig.5) and I(o)av is the average output current.

4. The clipping function is active in the CD-R write mode for the segment outputs (not for outputs RFP and RFN) and

in the read mode for all outputs. In the read mode, the clipping level is increased to 8 mA.

5. Outputs E, F, G, and H: Io = 1.5 mA output current. Definition of matching: (---I--E----I+--o---(I-m-F---a-+--x--)-I--–G----I-+-o---(-Im--H--i-n-)--)-×-----14---- – Vref × I(o)av where

Vref = Vref1 = Vref2 (see Fig.5) and I(o)av is the average output current.

Msens = ±7% for reading CD-RW, CD-ROM, DVD+RW and writing CD-R mode.

6. The settling time includes the recovery time.

7. Definition: 20log × I-I-R-R---FF---PP-----+–----I-I-RR----FF---NN--

8. The sensitivity of the TZA1045 is specified in A/W because it has current outputs. In the application diagram

(see Fig.5) the resistors of 150 Ω convert the currents into voltages (V/W). The maximum absolute spread is ±10%.

9. Writing without clipping.

10. Writing with clipping in CD-R mode for all segment outputs (not outputs RFP and RFN).

11. Reading with clipping active and switched to a level of typical 8 mA.

2003 Jun 26

13

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