参数资料
型号: MAX9856ETL+T
厂商: Maxim Integrated Products
文件页数: 22/46页
文件大小: 0K
描述: IC AUDIO CODEC 40TQFN-EP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: 音频编解码器
数据接口: 串行
分辨率(位): 18 b
ADC / DAC 数量: 2 / 2
三角积分调变:
S/N 比,标准 ADC / DAC (db): 77 / 91
动态范围,标准 ADC / DAC (db): 85 / 91
电压 - 电源,模拟: 1.71 V ~ 3.6 V
电压 - 电源,数字: 1.71 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 40-WFQFN 裸露焊盘
供应商设备封装: 40-TQFN-EP(5x5)
包装: 带卷 (TR)
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
______________________________________________________________________________________
29
BITS
FUNCTION
AGCATK
AGC Attack Time. The attack time is the time it takes to reduce the gain after the input signal has
exceeded the threshold level. The gain attenuation during attack is exponential and the attack time is
defined as one-time constant rather than the time it takes to reach the final gain:
00—3ms
01—12ms
10—50ms (recommended)
11—200ms
AGCHLD
AGC Hold Time. Hold time is the delay before the AGC release begins. The hold time counter starts
whenever the signal drops below the AGC threshold and is reset by any signal that exceeds the
threshold:
00—AGC disabled
01—50ms
10—100ms (recommended)
11—400ms
AGCSRC
AGC and Noise Gate Signal Source. Selects the audio signal that the AGC and noise gate circuitry
monitors:
0—Left-channel ADC output
1—Left-channel + right channel ADC output (results in 3dB lower threshold for coherent signals)
AGC Threshold. Sets the signal level at which the AGC begins gain reduction. The signal is monitored
after the ADC output gain has been applied.
AGC THRESHOLD LEVELS
AGCSTH
LEVEL (dB)
0000
-3
0001
-4
0010
-5
0011
-6
0100
-7
0101
-8
0110
-9
0111
-10
1000
-11
1001
-12
1010
-13
1011
-14
1100
-15
1101
-16
1110
-17
AGCSTH
1111
-18
AGC Register Bit Description (continued)
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