LP3952RLX National Semiconductor, LP3952RLX Datasheet - Page 18

• Manufacturer Part Number: LP3952RLX
• Manufacturer: National Semiconductor

Specifications of LP3952RLX

• Operating Supply Voltage (typ): 3.3/5V
• Number Of Segments: 6
• Operating Temperature (min): -30C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Pin Count: 36
• Mounting: Surface Mount
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Not Compliant

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Symbol
AUDIO SYNCHRONIZATION ELECTRICAL PARAMETERS
CONTROL OF ADC AND AUDIO SYNCHRONIZATION
The following table describes the controls required for audio synchronization.
f
Z
A
SPEED_CTRL[1:0]
3dB
MODE_CTRL[1:0]
IN
IN
INPUT_SEL[1:0]
GAIN_SEL[2:0]
SYNC_MODE
EN_SYNC
EN_AGC
EN_AVG
Parameter
Input Impedance of ASE
Audio Input Level Range
(peak-to-peak)
Crossover Frequencies (-3 dB)
Narrow Frequency Response
Wide Frequency Response
Bits 7-5
Bits 1-0
Bits 3-2 See below: Mode control
Bits 1-0
Bit 4
Bit 3
Bit 2
Bit 4
Input signal gain control. Range 0...21 dB, step 3 dB:
[000] = 0 dB (default)
[001] = 3 dB
[010] = 6 dB
Synchronization mode selector.
SYNCMODE = 0
SYNCMODE = 1
Automatic Gain Control enable
1 = enabled
0 = disabled (Gain Select enabled) (default)
Audio synchronization enable
1 = Enabled
Note : If AGC is enabled, AGC gain starts from current GAIN_SEL gain value.
0 = Disabled (default)
[00] = Single ended input signal, ASE.
[01] = Not used
[10] = Not used
[11] = No input (default)
0 – averaging disabled (not applicable in audio sync mode)
1 – averaging enabled (not applicable in audio sync mode)
Sets the LEDs light response time to audio input.
[00] = FASTEST (default)
[01] = FAST
[10] = MEDIUM
[11] = SLOW
(For SLOW setting in amplitude mode f
Frequency mode f
Conditions
Gain = 21 dB
Gain = 0 dB
Low Pass
Band Pass
High Pass
Low Pass
Band Pass
High Pass
Audio_sync_CTRL1 (2AH)
Audio_sync_CTRL2 (2BH)
→
→
MAX
Amplitude Mode (default)
Frequency Mode
= 7.6 Hz)
18
[011] = 9 dB
[100] = 12 dB
[101] = 15 dB
MAX
= 3.8 Hz,
Min
250
0.1
1.0 and 1.5
2.0 and 3.0
Typical
[110] = 18 dB
[111] = 21 dB
500
0.5
2.0
1.0
4.0
V
DDA
Max
-0.1
Units
kHz
kΩ
V