TLC320AC02IPM datasheet(43/84 Pages) TI

43 / 84 page

3–4

3.5.5

DAC Channel Signal-to-Distortion Ratio, VDD = 5 V, fs = 8 kHz (Unless

Otherwise Noted)

PARAMETER

TEST CONDITIONS

AV = 0 dB

AV = – 6 dB

AV = – 12 dB

UNIT

PARAMETER

TEST CONDITIONS

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

VO = – 6 dB to 0 dB

—

VO = – 12 dB to – 6 dB

—

VO = – 18 dB to – 12 dB

DAC channel signal-to-

distortion ratio

VO = – 24 dB to – 18 dB

distortion ratio

(see Note 8)

VO = – 30 dB to – 24 dB

(see Note 8)

VO = – 36 dB to – 30 dB

VO = – 42 dB to – 36 dB

VO = – 48 dB to – 42 dB

NOTE 8: The input signal, VI, is the digital equivalent of a 1020-Hz sine wave (full-scale analog output at full-scale digital

input = 0 dB). The nominal differential DAC channel output with this input condition is 6 V peak to peak. The

load impedance for the DAC output buffer is 600

Ω from OUT+ to OUT–.

3.5.6

System Distortion, VDD = 5 V, fs = 8 kHz, FCLK = 144 kHz (Unless Otherwise

Noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Single ended input (see Note 9)

Second harmonic

Single-ended input (see Note 9)

ADC channel

Second harmonic

Differential input (see Note 9)

attenuation

Third harmonic and

Single-ended input (see Note 9)

higher harmonics

Differential input (see Note 9)

Single-ended output

(buffered DAC VMID)

Second harmonic

(buffered DAC VMID)

(see Note 10)

DAC channel

attenuation

Differential output (see Note 10)

attenuation

Third harmonic and

higher harmonics

Single-ended output

(see Note 10)

higher harmonics

Differential output (see Note 10)

† All typical values are at VDD = 5 V and TA = 25°C.

NOTES:

9. The input signal is a 1020-Hz sine wave for the ADC channel. Harmonic distortion is defined for an input

level of – 1 dB.

10. The input signal is the digital equivalent of a 1020-Hz sine wave (digital full scale = 0 dB). The nominal

differential DAC channel output with this input condition is 6 V peak to peak. The load impedance for the

DAC output buffer is 600

Ω from OUT+ to OUT–. Harmonic distortion is specified for a signal input level

of 0 dB.

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