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LM1971M Datenblatt(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Teilenummer LM1971M
Bauteilbeschribung  LM1971 Overture??Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with/Mute
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

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Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, V
DD
15V
Voltage at any pin
(GND −0.2V) to (V
DD +0.2V)
ESD Susceptibility (Note 4)
3000V
Soldering Information
N Package (10s)
M Package
Vapor Phase (60s)
Infrared (15s)
260˚C
215˚C
220˚C
Power Dissipation (Note 3)
150 mW
Junction Temperature
150˚C
Storage Temperature
−65˚C to +150˚C
Operating Ratings (Notes 1, 2)
Temperature Range
T
MIN ≤ TA ≤ TMAX
−20˚C
≤ T
A ≤ +85˚C
Thermal Resistance
M08A Package,
θ
JA
167˚C/W
N08E Package,
θ
JA
102˚C/W
Supply Voltage
4.5V to 12V
Electrical Characteristics (Notes 1, 2)
The following specifications apply for V
DD = +12V (VREFIN = +6V), VIN = 5.5 Vpk, and f = 1 kHz, unless otherwse specified.
Limits apply for T
A = 25˚C. Digital inputs are TTL and CMOS compatible.
Symbol
Parameter
Conditions
LM1971
Units
(Limits)
Typical
(Note 5)
Limit
(Note 6)
I
S
Supply Current
Digital Inputs Tied to 6V
1.8
3
mA (max)
THD
Total Harmonic Distortion
V
IN = 0.5Vpk@ 0 dB Attenuation
0.0008
0.003
% (max)
e
IN
Noise
Input is AC Grounded
@ −12 dB Attenuation
A-Weighted (Note 7)
4.0
µV
DR
Dynamic Range
Referenced to Full Scale = +6 V
pk
115
dB
A
M
Mute Attenuation
102
96
dB (min)
Attenuation Step Size Error
0 dB to −62 dB
0.009
0.2
dB (max)
Absolute Attenuation
Attenuation @ 0dB
Attenuation @ −20 dB
Attenuation @ −40 dB
Attenuation @ −60 dB
Attenuation @ −62 dB
0.1
−20.3
−40.5
−60.6
−62.6
0.5
−19.0
−38.0
−57.0
−59.0
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
I
LEAK
Analog Input Leakage Current
Input is AC Grounded
5.8
100
nA (max)
Frequency Response
20 Hz–100 kHz
±0.1
dB
R
IN
AC Input Impedance
Pin 8, V
IN = 1.0 Vpk,f = 1 kHz
40
20
60
k
Ω (min)
k
Ω (max)
I
IN
Input Current
@ Pins 4, 5, 6 @ 0V < V
IN < 5V
1.0
100
nA (max)
f
CLK
Clock Frequency
3
2
MHz (max)
V
IH
High-Level Input Voltage
@ Pins 4, 5, 6
2.0
V (min)
V
IL
Low-Level Input Voltage
@ Pins 4, 5, 6
0.8
V (max)
Note 1:
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 2: All voltages are measured with respect to the GND pin (pin 3), unless otherwise specified.
Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum
allowable power dissipation is PD = (TJMAX –TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM1971N and LM1971M,
TJMAX = +150˚C, and the typical junction-to-ambient thermal resistance, θJA, when board mounted is 102˚ C/W and 167˚ C/W, respectively.
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 guarantees that all parts are tested in production to meet the stated values.
Note 7: Due to production test limitations, there is no limit for the Noise test. Please refer to the noise measurements in the Typical Performance Characteristics sec-
tion.
www.national.com
3


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