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PDF MUSES72320 Data sheet ( Hoja de datos )
| Número de pieza | MUSES72320 | |
| Descripción | 2-Channel Electronic Volume | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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MUSES72320
±18V Operation 2-Channel Electronic Volume
GENERAL DESCRIPTION
The MUSES72320 is a ±18V operation 2-channel
electronic volume, which is optimized for high-end audio
and professional audio applications with advanced circuitry
and layout. The MUSES72320 performs low noise and low
distortion characteristics and with resistance ladder circuit.
All of functions are controlled via three-wired serial bus.
Selectable 8-Chip address is available for using four chips
on same serial bus line.
It’s suitable for highly linear volume control of Hi-fi audio
systems.
PACKAGE OUTLINE
MUSES72320V
FEATURES
Operating Voltage
±8.5 to ±18V
3-Wired Serial Control
Chip Address Select Function
Selectable 8-Chip Address
Available for using eight chips on same serial bus line
Low Output Noise
*It conforms to the characteristic of an external operational amplifier.
Low Distortion
*It conforms to the characteristic of an external operational amplifier.
Volume
0dB to –111.5dB /0.25dBstep, MUTE
+31.5 to 0dB / 0.5dBstep
Channel Separation
-120dB typ.
Zero Cross Detection circuit Detection
CMOS Technology
Package Outline
SSOP32
BLOCK DIAGRAM
Ver. 1.0E
Zero Cross Detection Z/C
V+
D_VDD
Control Logic
D_REF
V-
DATA LATCH ADR1
CLOCK ADR0 ADR2
–1–
1 page  
TERMINAL DESCRIPTION
PIN NO. SYMBOL
FUNCTION
MUSES72320
EQUIVALENT CIRCUIT
V+
TERMINAL
DC
VOLTAGE
23 InR Rch input
26 InL Lch input
100Ω
V-(sub)
20kΩ
L_REF
R_REF
0V
2
L_REF
Lch Reference Voltage
4
6
11
R_REF
Rch Reference Voltage
13
15
1.5kΩ
V+
V-(sub)
3 L+ Lch Opamp non-inverting
input connect terminal
14 R+ Rch Opamp non-inverting
input connect terminal
V+
V-(sub)
0V
0V
V+
5 L- Lch Opamp inverting input
connect terminal
12 R- Rch Opamp inverting input
connect terminal
V-(sub)
0V
–5–
5 Page 
MUSES72320
NOTES
It is necessary to add RD to 10k for the over-current protection. Without this resistor, the IC may be damaged, depending on
the power procedure.
+15V
V+
No Current
+5V
D_VDD
125kΩ
125kΩ
V-(sub)
D_REF
a) The power[V+] is greater than the power[D_VDD].
0V
V+
Current flow s
+5V
D_VDD
125kΩ
125kΩ
V-(sub)
D_REF
b) The power[V+] is less than the power[D_VDD].
Fig.1 Damaged path of the MUSES72320
The input coupling capacitors(CIN) and the input resistance(RIN=20k) form a high-pass filter with the corner frequency
determined in [fc=1/(2RINCIN)].
The Rbias affects the Volume(Att.) linearity characteristic. When Rbias value is too small, the amount of attenuation increases,
so that the output amplitude becomes small and THD deteriorates by an internal analog switch. On the other hand, when Rbias is
too large, it may be affected at the noise from the outside. Please decide resistance value after it verifies it enough by an actual
application.
Separate for REF terminals for High and Middle voltage(AC) and REF terminals for Low voltage(AC) in the pattern design.
Pin No.
2
4
6
11
13
15
Function
Purpose
Lch Reference Voltage
for Low voltage(AC) signal
Lch Reference Voltage
for Middle voltage(AC) signal
Lch Reference Voltage
for High voltage(AC) signal
Rch Reference Voltage
for High voltage(AC) signal
Rch Reference Voltage
for Middle voltage(AC) signal
Rch Reference Voltage
for Low voltage(AC) signal
Table.1 Purpose of Reference Voltage Terminal
– 11 –
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet MUSES72320.PDF ] | |
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