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参数资料
| 型号： | ISD2548P |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 音频合成 |
| 英文描述： | SINGLE-CHIP, MULTIPLE-MESSAGES, VOICE RECORD/PLAYBACK DEVICE 32-, 40-, 48-, AND 64-SECOND DURATION |
| 中文描述： | 48 SEC, SPEECH SYNTHESIZER WITH RCDG, PDIP28 |
| 封装： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件页数： | 7/42页 |
| 文件大小： | 1356K |
| 代理商： | ISD2548P |
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ISD2532/40/48/64
PIN NO.
PIN NAME
SOIC/
PDIP
TSOP
FUNCTION
V
CCA
, V
CCD
16, 28
23, 7
Supply Voltage
: To minimize noise, the analog and digital circuits
in the ISD2500 series devices use separate power busses. These
voltage busses are brought out to separate pins and should be tied
together as close to the supply as possible. In addition, these
supplies should be decoupled as close to the package as possible.
MIC
17
24
Microphone
: The microphone pin transfers input signal to the on-
chip preamplifier. A built-in Automatic Gain Control (AGC) circuit
controls the gain of this preamplifier from –15 to 24dB. An external
microphone should be AC coupled to this pin via a series capacitor.
The capacitor value, together with the internal 10 K
resistance on
this pin, determines the low-frequency cutoff for the ISD2500 series
passband. See Winbond’s Application Information for additional
information on low-frequency cutoff calculation.
MIC REF
18
25
Microphone Reference
: The MIC REF input is the inverting input
to the microphone preamplifier. This provides a noise-canceling or
common-mode rejection input to the device when connected to a
differential microphone.
AGC
19
26
Automatic Gain Control
: The AGC dynamically adjusts the gain of
the preamplifier to compensate for the wide range of microphone
input levels. The AGC allows the full range of whispers to loud
sounds to be recorded with minimal distortion. The “attack” time is
determined by the time constant of a 5 K
internal resistance and
an external capacitor (C2 on the schematic of Figure 5 in section
11) connected from the AGC pin to V
SSA
analog ground. The
“release” time is determined by the time constant of an external
resistor (R2) and an external capacitor (C2) connected in parallel
between the AGC pin and V
SSA
analog ground. Nominal values of
470 K
and 4.7
μ
F give satisfactory results in most cases.
ANA IN
20
27
Analog Input
: The analog input transfers analog signal to the chip
for recording. For microphone inputs, the ANA OUT pin should be
connected via an external capacitor to the ANA IN pin. This
capacitor value, together with the 3.0 K
input impedance of ANA
IN, is selected to give additional cutoff at the low-frequency end of
the voice passband. If the desired input is derived from a source
other than a microphone, the signal can be fed, capacitively
coupled, into the ANA IN pin directly.
Publication Release Date: June 2003
- 7 -
Revision 1.0
相关PDF资料 |
PDF描述 |
|---|---|
| ISD2548X | SINGLE-CHIP, MULTIPLE-MESSAGES, VOICE RECORD/PLAYBACK DEVICE 32-, 40-, 48-, AND 64-SECOND DURATION |
| ISD2564P | SINGLE-CHIP, MULTIPLE-MESSAGES, VOICE RECORD/PLAYBACK DEVICE 32-, 40-, 48-, AND 64-SECOND DURATION |
| ISD2564X | SINGLE-CHIP, MULTIPLE-MESSAGES, VOICE RECORD/PLAYBACK DEVICE 32-, 40-, 48-, AND 64-SECOND DURATION |
| ISD2540 | Single-Chip Voice Record/Playback Device（Single-chip Durations of 40 seconds)(单片的录音/录音重放器(一片信息存储持续时间40秒）) |
| ISD2532 | Single-Chip Voice Record/Playback Device（Single-chip Durations of 32 seconds)(单片的录音/录音重放器(一片信息存储持续时间32秒）) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISD2548PRODUCTS | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| ISD2548S | 功能描述:IC VOICE REC/PLAY 48SEC 28-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 语音录制和重放 系列:ISD2500 标准包装:14 系列:- 接口:串行 滤波器通频带:1.7kHz 持续时间:8 ~ 32 秒 安装类型:通孔 封装/外壳:28-DIP（0.300"，7.62mm） 供应商设备封装:28-PDIP 其它名称:90-21300+000 |
| ISD2548SY | 功能描述:IC MEM VOICE REC/PLAY 48S 28SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 语音录制和重放 系列:ISD2500 标准包装:14 系列:- 接口:串行 滤波器通频带:1.7kHz 持续时间:8 ~ 32 秒 安装类型:通孔 封装/外壳:28-DIP（0.300"，7.62mm） 供应商设备封装:28-PDIP 其它名称:90-21300+000 |
| ISD2548X | 制造商:WINBOND 制造商全称:Winbond 功能描述:SINGLE-CHIP, MULTIPLE-MESSAGES, VOICE RECORD/PLAYBACK DEVICE 32-, 40-, 48-, AND 64-SECOND DURATION |
| ISD2560 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Single-Chip Voice Record/Playback Devices 32-, 40-, 48-, 64-,60-,75,90-, and 120-Second Durations |
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