ds4420nt-r Maxim Integrated Products, Inc., ds4420nt-r Datasheet - Page 7

• Manufacturer Part Number: ds4420nt-r
• Description: Ds4420 I?c Programmable Gain Amplifier For Audio Applications
• Manufacturer: Maxim Integrated Products, Inc.

The slave address byte consists of a 7-bit slave
address plus a R/W bit (see Figure 2). The DS4420’s
slave address is determined by the state of the A0, A1,
and A2 address pins. These pins allow up to eight
DS4420s to reside on the same I
connected to GND result in a ‘0’ in the corresponding
bit position in the slave address. Conversely, address
pins connected to V
ing bit positions. For example, the DS4420’s slave
address byte is A0h when A0, A1, and A2 pins are
grounded. I
the I
Figure 1. Control Register Description
Control Register (F8h)
Power-Up Default:
2
C Serial Interface Description section.
Slave Address Byte and Address Pins
F8h
2
C communication is described in detail in
Standby
bit 4:0
bit 7
bit 7
bit 6
bit 5
CC
result in a ‘1’ in the correspond-
Standby: Places the DS4420 in standby mode.
0 = Normal operation.
1 = Places the DS4420 in standby mode. (Power-up default.)
Don’t care.
Mute: Mutes the amplifier output, regardless of the current gain setting.
0 = Normal operation. (Power-up default.)
1 = Mutes the amplifier output.
Gain Setting: Five-bit gain setting. The power-up default is setting 00h.
1000 0000 b
x
2
C bus. Address pins
I
2
_____________________________________________________________________
C Programmable-Gain Amplifier
Mute
SETTING
GAIN
(hex)
0Ah
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
bit 4
GAIN
(dB)
Figure 2. DS4420 Slave Address Byte
-35
-32
-29
-26
-23
-20
-17
-14
-11
-8
-5
for Audio Applications
*THE SLAVE ADDRESS IS DETERMINED BY ADDRESS PINS A0, A1, AND A2.
bit 3
MSB
15h to 1Fh
SETTING
1
GAIN
(hex)
0Ch
0Dh
0Bh
0Eh
0Fh
10h
11h
12h
13h
14h
Gain Setting[4:0]
0
bit 2
1
ADDRESS*
SLAVE
0
Illegal
GAIN
(dB)
+10
+13
+16
+19
+22
+25
+1
+4
+7
-2
A2
bit 1
A1
A0
READ/WRITE
R/W
BIT
LSB
bit 0
7