Datasheet

LM1971
www.ti.com SNAS104B –FEBRUARY 1995–REVISED APRIL 2013
Electrical Characteristics
(1)(2)
The following specifications apply for V
DD
= +12V (V
REF
IN = +6V), V
IN
= 5.5 V
pk
, and f = 1 kHz, unless otherwse specified.
Limits apply for T
A
= 25°C. Digital inputs are TTL and CMOS compatible.
LM1971
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)
I
S
Supply Current Digital Inputs Tied to 6V 1.8 3 mA (max)
THD Total Harmonic Distortion V
IN
= 0.5V
pk
@ 0 dB Attenuation 0.0008 0.003 % (max)
e
IN
Noise Input is AC Grounded @ −12 dB 4.0 μV
Attenuation
A-Weighted
(5)
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 @ 0 dB 0.1 0.5 dB (min)
Attenuation @ −20 dB −20.3 −19.0 dB (min)
Attenuation @ −40 dB −40.5 −38.0 dB (min)
Attenuation @ −60 dB −60.6 −57.0 dB (min)
Attenuation @ −62 dB −62.6 −59.0 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 V
pk
, f = 1 kHz 40 20 kΩ (min)
60 kΩ (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)
(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 specify specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(2) All voltages are measured with respect to the GND pin (pin 3), unless otherwise specified.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specifications that all parts are tested in production to meet the stated values.
(5) Due to production test limitations, there is no limit for the Noise test. Please refer to Figure 5 and Figure 8 in Typical Performance
Characteristics.
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