TDA4881 查看數據表（PDF） - Philips Electronics

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TDA4881

Advanced monitor video controller

Philips Electronics 

Philips Semiconductors

Advanced monitor video controller

Preliminary specification

TDA4881

Notes to the characteristics

1. Typical range is 1 to 6 V, the range can be increased (e.g. 0 to 7 V) to slightly increase the control range.

2. Open contrast control pin leads to undefined contrast setting.

3. The internal reference voltage can be measured at pins 18, 15 and 12 during output clamping in closed feedback

loop.

4. Minimum guaranteed control range, the typical minimum black level voltage is 0.1 V.

5. The signal-to-noise ratio is calculated by the formula (frequency range 1 to 70 MHz):

p----e---a---k------t--o------p-R---e-M--a---kS-----v-v--a-a--l-l-u-u--e-e----o-o--f-f--t--th-h--e--e---n-n---o-o--m-i-s---ie-n----ao---l-u--s-t--pi-g--u-n--t--a--v-l--o-o--l-tu--a--t-gp---e-u---t---v---o----l-t-a----g---e---

6. The external RC combinations at pins 19, 16 and 13 enables peak currents during transients.

7. The internal threshold voltages are derived from an internally stabilized voltage. The internal pulses are generated if

the input pulses are higher than the thresholds.

November 1992

Fig.4 Timing of pulses at pin 10.

10

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