Datasheet

LM1972
www.ti.com SNAS094D –APRIL 1995–REVISED MARCH 2013
Electrical Characteristics
(1)(2)
The following specifications apply for all channels with V
DD
= +6V, V
SS
= −6V, V
IN
= 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
(3)
Limit
(4)
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 kΩ (min)
60 kΩ (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, V
SS
=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).
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