lp5527tlx National Semiconductor Corporation, lp5527tlx Datasheet - Page 14

• Manufacturer Part Number: lp5527tlx
• Description: Tiny Led Driver For Camera Flash And 4 Leds With I2c Programmability, Connectivity Test And Audio Synchronization
• Manufacturer: National Semiconductor Corporation

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Audio Synchronization
Audio Input Threshold Setting
Typical Gain Values vs. Audio Input Amplitude
Logic Interface Characteristics
Limits in standard typeface are for T
(-30
10 µF, C
nF, L
Symbol
Logic Inputs SCL and FLASH_SYNC
V
V
I
f
Logic Input NRST
V
V
I
t
Logic Input/Output SDA
V
I
I
SCL
I
NRST
L
IL
IH
IL
IH
OL
Threshold[3:0]
Audio Input Amplitude mV
o
C
1
= 4.7 µH (Note 9)
<
0000
0001
0010
1110
1111
OUT1
*
*
T
A
20 to 1600
<
10 to 800
3 to 170
5 to 400
= 10 µF, C
Parameter
Input Low Level
Input High Level
Input Current
SCL Pin Clock Frequency
Input Low Level
Input High Level
Input Current
Reset Pulse Width
Output Low Level
Output leakage current
0 to 10
0 to 20
0 to 40
1 to 85
+85
o
C). Unless otherwise noted, specifications apply to the LP5527 Block Diagram with: V
Threshold Level, mV (typical)
OUT2
= 10 µF, C
P-P
Disabled
J
= 25
0.2
0.4
2.5
2.7
*
*
(Continued)
Gain Value dB
VDDIO
Condition
V
V
I
V
o
OUT
C. Limits in boldface type apply over the operating ambient temperature range
DD_IO
DD_IO
OUT
-12
-18
-24
-31
-37
-46
-6
0
= 3 mA
= 100 nF, C
= 2.8V
= 1.65V to V
= 1.65V to V
VREF
14
DD1,2
DD1,2
= 100 nF, C
Input Signal Gain Control
Refreshing Frequency
SPEED_CTRL[1:0]
00
01
10
11
GAIN_SEL[2:0]
000
001
010
011
100
101
110
111
VDDA
Min
0.8xV
= 4.7 µF, C
-1.0
-1.0
1.2
10
DD_IO
Typical
VDD1
400
0.3
= 100 nF, C
Refreshing Rate Hz
FASTEST
15
7.6
3.8
Max
0.2xV
IN
Gain dB
0
-6
-12
-18
-24
-31
-37
-46
= 3.6V, C
1.0
0.5
1.0
0.5
1.0
DD_IO
VDD2
= 100
IN
Unit
kHz
µA
µA
µA
µs
=
V
V
V
V
V