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参数资料
| 型号： | LM1972MNOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封装： | SOP-20 |
| 文件页数： | 5/12页 |
| 文件大小： | 406K |
| 代理商： | LM1972MNOPB |
Absolute Maximum Ratings (Notes 2, 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
DD–VSS)
15V
Voltage at Any Pin
V
SS 0.2V to VDD + 0.2V
Power Dissipation (Note 3)
150 mW
ESD SusceptabiIity (Note 4)
2000V
Junction Temperature
150°C
Soldering Information
N Package (10 sec.)
+260°C
Storage Temperature
65°C to +150°C
Operating Ratings (Notes 1, 2)
T
MIN
T
A
T
MAX
Temperature Range
T
MIN ≤TA ≤TMAX
0°C
≤T
A
≤ +70°C
Supply Voltage (V
DD VSS)
4.5V to 12V
Electrical Characteristics (Notes 1, 2)
The following specifications apply for all channels with V
DD = +6V, VSS = 6V, VIN = 5.5 Vpk, and f = 1 kHz, unless otherwise
specified. Limits apply for T
A = 25°C. Digital inputs are TTL and CMOS compatible.
Symbol
Parameter
Conditions
LM1972
Units
(Limits)
Typical
Limit
(Note 5)
(Note 6)
I
S
Supply Current
Inputs are AC Grounded
2
4
mA (max)
THD+N
Total Harmonic Distortion plus Noise
V
IN = 0.5 Vpk @ 0dB Attenuation
0.0008
0.003
% (max)
XTalk
Crosstalk (Channel Separation)
0dB Attenuation for V
IN
110
100
dB (min)
V
CH measured @ 78dB
SNR
Signal-to-Noise Ratio
Inputs are AC Grounded
@ 12dB Attenuation
120
110
dB (min)
A-Weighted
A
M
Mute Attenuation
104
96
dB (min)
Attenuation Step Size Error
0dB to 47.5dB
±0.05
dB (max)
48dB to 78dB
±0.25
dB (max)
Absolute Attenuation Error
Attenuation @ 0dB
0.03
0.5
dB (min)
Attenuation @ 20dB
19.8
19.0
dB (min)
Attenuation @ 40dB
39.5
38.5
dB (min)
Attenuation @ 60dB
59.3
57.5
dB (min)
Attenuation @ 78dB
76.3
74.5
dB (min)
Channel-to-Channel Attenuation
Attenuation @ 0dB, 20dB, 40dB, 60dB
±0.5
dB (max)
Tracking Error
Attenuation @ 78dB
±0.75
dB (max)
I
LEAK
Analog Input Leakage Current
Inputs are AC Grounded
10.0
100
nA (max)
R
IN
AC Input Impedance
Pins 4, 20, V
IN = 1.0 Vpk, f = 1 kHz
40
20
k
Ω (min)
60
k
Ω (max)
I
IN
Input Current
@ Pins 9, 10, 11 @ 0V < V
IN < 5V
1.0
±100
nA (max)
f
CLK
Clock Frequency
3
2
MHz (max)
V
IH
High-Level Input Voltage
@ Pins 9, 10, 11
2.0
V (min)
V
IL
Low-Level Input Voltage
@ Pins 9, 10, 11
0.8
V (max)
Data-Out Levels (Pin 12)
V
DD=6V, VSS=0V
0.1
V (max)
5.9
V (min)
Note 1:
All voltages are measured with respect to GND pins (1, 3, 5, 6, 14, 16, 19), unless otherwise specified.
Note 2:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions
which guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters
where no limit is given, however, the typical value is a good indication of device performance.
Note 3:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX, θJA, and the ambient temperature TA. The maximum
allowable power dissipation is PD = (T
JMAX TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM1972, TJMAX = +150°
C, and the typical junction-to-ambient thermal resistance, when board mounted, is 65°C/W.
Note 4:
Human body model, 100 pF discharged through a 1.5 k
Ω resistor.
Note 5:
Typicals are measured at 25°C and represent the parametric norm.
Note 6:
Limits are guaranteed to National's AOQL (Average Output Quality Level).
www.national.com
2
LM1972
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| LM1972MX | 功能描述:衰减器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰减:18 dB 容差: 阻抗: 功率额定值:30 dBm 安装风格:SMD/SMT 工作温度范围:- 40 C to + 85 C |
| LM1972MX/NOPB | 功能描述:有源衰减器 RoHS:否 制造商:TriQuint Semiconductor 通道数量: 最大频率: 阻抗: 最大 VSWR: 位数: 最大工作温度: 最小工作温度: |
| LM1972N | 功能描述:IC AUDIO ATTENUATOR 2CH 20-DIP RoHS:否 类别:集成电路 (IC) >> 线性 - 音频处理 系列:- 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
| LM1972N | 制造商:Texas Instruments 功能描述:AUDIO ATTENUATOR 78DB 1972 DIP20 |
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