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LM1972MNOPB Scheda tecnica(PDF) 3 Page - Texas Instruments

Il numero della parte LM1972MNOPB
Spiegazioni elettronici  LM1972 關Pot 2-Channel 78dB Audio Attenuator with Mute
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Homepage  http://www.ti.com
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LM1972
www.ti.com
SNAS094D – APRIL 1995 – REVISED MARCH 2013
Electrical Characteristics
(1) (2)
The following specifications apply for all channels with VDD = +6V, VSS = −6V, VIN = 5.5 Vpk, and f = 1 kHz, unless otherwise
specified. Limits apply for TA = 25°C. Digital inputs are TTL and CMOS compatible.
Symbol
Parameter
Conditions
LM1972
Units
(Limits)
Typical(3)
Limit (4)
IS
Supply Current
Inputs are AC Grounded
2
4
mA (max)
THD+N
Total Harmonic Distortion plus Noise
VIN = 0.5 Vpk @ 0dB Attenuation
0.0008
0.003
% (max)
XTalk
Crosstalk (Channel Separation)
0dB Attenuation for VIN
110
100
dB (min)
VCH measured @ −78dB
SNR
Signal-to-Noise Ratio
Inputs are AC Grounded
@
−12dB Attenuation
120
110
dB (min)
A-Weighted
AM
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)
ILEAK
Analog Input Leakage Current
Inputs are AC Grounded
10.0
100
nA (max)
RIN
AC Input Impedance
Pins 4, 20, VIN = 1.0 Vpk, f = 1 kHz
40
20
k
Ω (min)
60
k
Ω (max)
IIN
Input Current
@ Pins 9, 10, 11 @ 0V < VIN < 5V
1.0
±100
nA (max)
fCLK
Clock Frequency
3
2
MHz (max)
VIH
High-Level Input Voltage
@ Pins 9, 10, 11
2.0
V (min)
VIL
Low-Level Input Voltage
@ Pins 9, 10, 11
0.8
V (max)
Data-Out Levels (Pin 12)
VDD=6V, VSS=0V
0.1
V (max)
5.9
V (min)
(1)
All voltages are measured with respect to GND pins (1, 3, 5, 6, 14, 16, 19), unless otherwise specified.
(2)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional. Electrical Characteristics state DC and AC electrical specifications under particular test conditions. This
assumes that the device is within the Operating Ratings. The typical value is a good indication of device performance.
(3)
Typicals are measured at 25°C and represent the parametric norm.
(4)
Limits are specified to Texas Instrument's AOQL (Average Output Quality Level).
Copyright © 1995–2013, Texas Instruments Incorporated
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