LM1972 datasheet(3/21 Pages) TI1

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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)

Supply Current

Inputs are AC Grounded

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

Mute Attenuation

104

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

Ω (min)

Ω (max)

IIN

Input Current

@ Pins 9, 10, 11 @ 0V < VIN < 5V

1.0

±100

nA (max)

fCLK

Clock Frequency

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).

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