TLV320AIC21 datasheet(6/56 Pages) TI1

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Digital Inputs and Outputs

ADC PATH FILTER

ADC DYNAMIC PERFORMANCE

TLV320AIC20, TLV320AIC21

TLV320AIC24, TLV320AIC25

TLV320AIC20K, TLV320AIC24K

SLAS363D – MARCH 2002 – REVISED APRIL 2005

FS = 8 KHz, outputs not loaded

PARAMETER

MIN

TYP

MAX

UNIT

VOH

High-level output voltage, DOUT

0.8 IOVDD

VOL

Low-level output voltage, DOUT

0.1 IOVDD

IIH

High-level input current, any digital input

µA

IIL

Low-level input current, any digital input

µA

Input capacitance

Output capacitance

FS = 8 KHz (1)(2)

TEST

PARAMETER

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

CONDITIONS

PATH FILTER

FIR FILTER

IIR FILTER

0 Hz to 60 Hz

-27 / 0.07

-27 / 0.15

60 Hz to 200 Hz

-1 / 0.07

-0.75 / 0.15

200 Hz to 300 Hz

-0.03 / 0.05

0. 11 / 0.15

300 Hz to 2.4 KHz

-0.1

0.15

-0.1

0.25

Filter gain relative to gain

2.4 kHz to 3 kHz

-0.05

0.15

-0.5

0.2

at 1020 Hz

3 kHz to 3.4 KHz

-0.5

0.1

-0.5

0.2

3.4 kHz to 3.6 KHz

-0.4

0.15

4 KHz

-26

-42

4.5 KHz to 72 kHz

-52

(1)

The filter gain outside of the passband is measured with respect to the gain at 1020 Hz. The analog input test signal is a sine wave with

0 dB = 4 VI(PP) as the reference level for the analog input signal. The pass band is 0 to 3600 Hz for an 8-KHz sample rate. This pass

band scales linearly with the sample rate.

(2)

The filter characteristics are specified by design and are not tested in production. In places where more than one value is specified, the

first value is with the High Pass Filter on and the second value is with the HPF off

With FIR Filter, FS = 8 KHz (1)

TEST

PARAMETER

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

CONDITIONS

Line In Driver

AIC20/21/24/25

AIC20k/24k

VI = -3 dB

SNR

Signal-to-noise ratio

VI = -9 dB

VI = -3 dB

THD

Total harmonic distortion

VI = -9 dB

VI = -3 dB

Signal-to-harmonic

THD+N

distortion + noise

VI = -9 dB

(1)

The test condition is a differential 1020-Hz input signal with an 8-KHz conversion rate. Input and output common mode is 1.35 V.

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