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參數(shù)資料
| 型號(hào)： | LM4545 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | Codec |
| 英文描述： | AC ’97 Codec with Stereo Headphone Amplifier and National 3D Sound |
| 中文描述： | 交流\u0026#39;97編解碼器與立體聲耳機(jī)放大器和國家3D聲音 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 327K |
| 代理商： | LM4545 |
Pin Descriptions
(Continued)
Analog I/O
(Continued)
Name
Pin
I / O
Functional Description
This is a post-mixed output for the right audio channel. The level of this output can be
adjusted from 0dB to 45dB in 1.5dB steps as well as muted via register 04h. HP_OUT_R
has a nominal gain of 9dB with respect to the right output mixer level and is designed for
driving a 32
impedance with minimal distortion.
HP_OUT_R
41
O
Digital I/O and Clocking
Name
Pin
I / O
Functional Description
XTL_IN
2
I
24.576 MHz crystal input. Use a fundamental-mode type crystal. When operating from a
crystal, a 1M
resistor must be connected across pins 2 and 3.
24.576 MHz crystal output. When operating from a crystal, a 1M
resistor must be
connected across pins 2 and 3.
This data stream contains both control data and DAC audio data. This input is sampled by
the LM4545 on the falling edge of BIT_CLK.
12.288 MHz clock which is derived (divide by two) from the 24.576MHz crystal input
(XTL_IN).
This data stream contains both control data and ADC audio data. This output is clocked out
by the LM4545 on the rising edge of BIT_CLK.
48kHz sync pulse which signifies the beginning of both the SDATA_IN and SDATA_OUT
serial streams. SYNC must be synchronous to BIT_CLK.
This active low signal causes a hardware reset which returns the control registers to their
default conditions.
XTL_OUT
3
O
SDATA_OUT
5
I
BIT_CLK
6
O
SDATA_IN
8
O
SYNC
10
I
RESET#
11
I
Power Supplies and References
Name
AVDD
AVSS
DVDD
DVSS
Pin
25,38
26,42
1,9
4,8
I / O
I
I
I
I
Functional Description
Analog supply pins.
Analog ground pins.
Digital supply pins.
Digital ground pins.
Nominal 2.2V reference output. Not intended to sink or source current. Bypassing of this pin
should be done with short traces to maximize performance.
Nominal 2.2V reference output. Can source up to 5mA of current and can be used to bias a
microphone. Do not connect any external capacitance to this pin.
This pin is not used and should be left open (NC). However, a capacitor to ground on this
pin is permitted as it will not affect performance.
This pin is not used and should be left open (NC). However, a capacitor to ground on this
pin is permitted as it will not affect performance.
These pins are used to complete the National 3D Sound circuit. Connect a 0.022μF
capacitor between pins 3DP and 3DN. The National 3D Sound can be turned on and off via
control register 20h. This is a fixed-depth type stereo enhance circuit, thus writing to register
22h has no effect. If National 3D Sound is not desired, then these pins should be left as no
connect (NC).
VREF
27
O
VREFOUT
28
O
AFILT1
29
O
AFILT2
30
O
3DP,3DN
31,32
O
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| LM4545VH | 功能描述:IC AUDIO CODEC '97 18BIT 48LQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| LM4545VHX | 功能描述:IC AUDIO CODEC '97 18BIT 48LQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| LM4546 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC 97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound |
| LM4546_09 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC 97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound |
| LM4546A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC 97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound |
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