TMS320C10 datasheet(39/61 Pages) TI

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3–5

3.3.8

Transmit Channel Signal-to-Distortion Ratio (see Note 7)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

VI = – 6 dB to – 0.1 dB

VI = – 12 dB to – 6 dB

VI = – 18 dB to – 12 dB

VI = – 24 dB to – 18 dB

D/A channel signal-to-distortion ratio

VI = – 30 dB to – 24 dB

VI = – 36 dB to – 30 dB

VI = – 42 dB to – 36 dB

VI = – 48 dB to – 42 dB

VI = – 54 dB to – 48 dB

NOTE 7: The test condition is a 1-kHz input signal with a 24-kHz conversion rate. The load impedance for the DAC is

600

Ω. Input and output voltages are referred to Vref.

3.3.9

Receive and Transmit Gain and Dynamic Range (see Note 8)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Transmit gain tracking error

VO = – 48 dB to 0 dB signal range

±0.05 ±0.25

Receive gain tracking error

VI = – 48 dB to 0 dB signal range

±0.05 ±0.25

NOTE 8: Gain tracking is relative to the absolute gain at 1 kHz and 0 dB (0 dB relative to Vref).

3.3.10

Receive Channel Band-Pass Filter Transfer Function, SCF fclock = 432 kHz,

Input (IN+ – IN –) is a

±3-V Sine Wave‡ (see Note 9)

PARAMETER

TEST

CONDITION

FREQUENCY

ADJUSTMENT

MIN

TYP†

MAX

UNIT

≤ 150 Hz

× 0 dB

–33

–29

–25

f = 300 Hz

× –0.26 dB

–4

–2

–1

f = 450 Hz to 9300 Hz

× 0 dB

– 0.25

0.25

Input signal

f = 9300 Hz to 9900 Hz

× 0 dB

– 0.3

0.3

Filter gain

Input signal

reference is 0 dB

f = 9900 Hz to 10950 Hz

× 0 dB

– 0.5

0.5

reference is 0 dB

f = 11.4 kHz

× 2.3 dB

–2

– 0.5

f = 12 kHz

× 2.7 dB

–16

–14

≥ 13.2 kHz

× 3.2 dB

–40

≥ 15 kHz

× 0 dB

–60

† All typical values are at TA = 25°C.

‡ The MIN, TYP, and MAX specifications are given for a 432-kHz SCF clock frequency. A slight error in the 432-kHz SCF

can result from inaccuracies in the MSTR CLK frequency, resulting from crystal frequency tolerances. If this frequency

error is less than 0.25%, the ADJUSTMENT ADDEND should be added to the MIN, TYP, and MAX specifications, where

K1 = 100

× [(SCF frequency – 432 kHz)/432 kHz]. For errors greater than 0.25%, see Note 9.

NOTE 9: The filter gain outside of the pass band is measured with respect to the gain at 1 kHz. The filter gain within the

pass band is measured with respect to the average gain within the pass band. The pass bands are 450 Hz

to 10.95 kHz and 0 to 10.95 kHz for the band-pass and low-pass filters, respectively. For switched-capacitor

filter clocks at frequencies other than 432 kHz, the filter response is shifted by the ratio of switched-capacitor

filter clock frequency to 432 kHz.

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