Datasheet > AD1885JST-REEL

AD1885JST-REEL

更新时间： 2024-02-13 12:03:11

品牌	Logo	应用领域
亚德诺 - ADI		商用集成电路
页数	文件大小	规格书
27页	287K
描述
IC SPECIALTY CONSUMER CIRCUIT, PQFP48, PLASTIC, LQFP-48, Consumer IC:Other

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技术参数
数据手册

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AD1885JST-REEL 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	QFP
包装说明：	PLASTIC, LQFP-48	针数：	48
Reach Compliance Code：	unknown	风险等级：	5.89
其他特性：	IT ALSO REQUIRES 3.15V TO 3.45V SUPPLY	商用集成电路类型：	CONSUMER CIRCUIT
JESD-30 代码：	S-PQFP-G48	JESD-609代码：	e0
长度：	7 mm	湿度敏感等级：	3
功能数量：	1	端子数量：	48
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	LFQFP
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE, FINE PITCH
峰值回流温度（摄氏度）：	240	认证状态：	COMMERCIAL
座面最大高度：	1.6 mm	最大供电电压 (Vsup)：	5.25 V
最小供电电压 (Vsup)：	4.75 V	表面贴装：	YES
温度等级：	COMMERCIAL	端子面层：	TIN LEAD
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	30
宽度：	7 mm

AD1885JST-REEL 数据手册

AD1885

MICROPHONE CONNECTIONS

The AD1885 contains an internal microphone preamp with 20 dB gain; in most cases a direct microphone connection as shown in

Figure 14 is adequate. If the microphone level is too low, an external preamp can be added as shown in Figure 15. In either case the

microphone bias can be derived from the Codec’s internal reference (V_REFOUT) using a 2.2 kΩ resistor. For the preamp circuit,

the V_REFOUTsignal can also provide the midpoint bias for the amplifier.

To meet the PC99 1.0A requirements, the MIC signal should be placed on the microphone jack tip and the bias on the ring. This

configuration supports electret microphones with three conductor plugs, as well as dynamic microphones with two conductor plugs

(ring and sleeve shorted together).

Additional filtering may be required to limit the microphone response to the audio band of interest.

EMC

COMPONENTS

L1 600Z

L2 600Z

AC-COUPLING

MIC BIAS

470pF

TO CODEC MIC1 OR MIC2 INPUT

FROM CODECVREFOUT

470pF

MIC INPUT

Figure 14. Recommended Microphone Input Connections

PREAMP

EMC

COMPONENTS

L1 600Z

AC-COUPLING

AVDD

470pF

L2 600Z

TO CODEC MIC1 OR MIC2 INPUT

FROM CODECVREFOUT

470pF

AD8531

MIC INPUT

MIC BIAS

Figure 15. Microphone with Additional External Preamp (20 dB Gain)

LINE OUTPUT CONNECTIONS

The AD1885 Codec provides stereo LINE_OUT signals at a standard 1 V rms level. These signals must be ac-coupled before they

can be connected to an external load. After the ac-coupling, a minimal resistive load is recommend to keep the capacitors properly

biased and reduce click and pop when plugging stereo equipment into the output jack. The capacitor values should be selected to

provide a desired frequency response, taking into account the nominal impedance of the external load. To meet the PC99 specifica-

tion for PCs, testing must be performed with a 10 kΩ load, therefore a 1 µF value is recommended to achieve less than –3 dB

roll-off at 20 Hz.

EMC

COMPONENTS

AC-COUPLING

STEREO LINE_OUT JACK

L2 600Z

FROM CODEC LINE_OUT_R

FROM CODEC LINE_OUT_L

470pF

L1 600Z

470pF

NOTE:

IF AN OUTPUT AMP IS USED,THE

AC-COUPLING CAPVALUESWILL

DEPENDEND ONTHE AMP DESIGN.

Figure 16. Recommended LINE_OUT Connections

REV. 0

–25–

1...22 23 242526 27

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与AD1885JST-REEL相关器件

型号	品牌	描述	获取价格	数据表
AD1885JSTZ	ADI	IC SPECIALTY CONSUMER CIRCUIT, PQFP48, PLASTIC, ROHS COMPLIANT, LQFP-48, Consumer IC:Other	获取价格
AD1886	ADI	AC’97 SoundMAX Codec	获取价格
AD1886A	ADI	AC’97 SoundMAX Codec	获取价格
AD1886AJST	ADI	AC’97 SoundMAX Codec	获取价格
AD1886AJST-REEL	ADI	IC SPECIALTY CONSUMER CIRCUIT, PQFP48, PLASTIC, LQFP-48, Consumer IC:Other	获取价格
AD1886AJSTZ	ADI	IC SPECIALTY CONSUMER CIRCUIT, PQFP48, PLASTIC, LQFP-48, Consumer IC:Other	获取价格

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