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19 VCC2 I Vcc for power block of spindle, tracking and focus
20 NC No Connection
21 VCTL I Speed control input of tray driver
22 GND I Ground
23 VINLD I Input for spindle driver
24 NC No Connection
25 TRB_2 O Connect to external transistor base
26 VINTK I Input for tracking driver
27 BIAS I Input for reference voltage
28 MUTE I Input for mute control
3.5.6 function introduction to 4558
1. Description
The RC4558 and RM4558 devices are dual general-purpose operational amplifiers with each half
electrically similar to the A741 except that offset null capability is not provided.？
The high common-mode input voltage range and the absence of latch-up make these amplifiers ideal for
voltage-follower applications. The devices are short-circuit protected and the internal frequency compensation
ensures stability without external components.
The RC4558 is characterized for operation from 0 C to 70 C, and the RM4558 is characterized for ？ ？
operation over the full military temperature range of –55 C to 125 C.
2. FEATURES
◆ Continuous-Short-Circuit Protection
◆ Wide Common-Mode and Differential
◆ Voltage Ranges
◆ No Frequency Compensation Required
◆ Low Power Consumption
◆ No Latch-Up
◆ Unity-Gain Bandwidth . . . 3 MHz Typ
◆ Gain and Phase Match Between Amplifiers
◆ Low Noise . . . 8 nV?Hz Typ at 1 kHz
◆ Designed To Be Interchangeable With
◆ Raytheon RC4558 and RM4558 Devices
3. PIN CONFIGURATION
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