TLC32046MFKB datasheet(36/56 Pages) TI

36 / 56 page

3–6

3.4

Operating Characteristics Over Recommended Operating Free-Air

Temperature Range, VCC+ = 5 V, VCC– = –5 V, VDD = 5 V

3.4.1

Receive and Transmit Noise (measurement includes low-pass and band-pass

switched-capacitor filters)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Broadband with (sin x)/x

250

500

Broadband without (sin x)/x

200

450

0 to 30 kHz with (sin x)/x

200

400

0 to 30 kHz without (sin x)/x

200

400

Tit

0 to 3.4 kHz with (sin x)/x

DX i

00000000000000

180

300

Transmit

noise

0 to 3.4 kHz without (sin x)/x

DX input = 00000000000000,

Constant input code

160

300

µVrms

noise

0 to 6.8 kHz with (sin x)/x

(wide-band operation with 7.2 kHz

roll-off)

Constant in ut code

180

350

0 to 6.8 kHz without (sin x)/x

(wide-band operation with 7.2 kHz

roll-off)

160

350

Receive noise (see Note 10)

Inputs grounded

Gain = 1

300

500

µVrms

Receive noise (see Note 10)

In uts grounded,

Gain = 1

dBrnc0

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

NOTE 10: The noise is computed by statistically evaluating the digital output of the A/D converter.

3.5

Timing Requirements

3.5.1

Serial Port Recommended Input Signals, TLC32046C and TLC32046I

PARAMETER

MIN

MAX

UNIT

tc(MCLK)

Master clock cycle time

tr(MCLK)

Master clock rise time

tf(MCLK)

Master clock fall time

Master clock duty cycle

25%

75%

RESET pulse duration (see Note 11)

800

tsu(DX)

DX setup time before SCLK

↓

th(DX)

DX hold time after SCLK

↓

tc(SCLK)/4

NOTE 11: RESET pulse duration is the amount of time that the RESET is held below 0.8 V after the power supplies have

reached their recommended values.

3.5.2

Serial Port Recommended Input Signals, TLC32046M

PARAMETER

MIN

TYP†

MAX

UNIT

tc(MCLK)

Master clock cycle time

tr(MCLK)

Master clock rise time

tf(MCLK)

Master clock fall time

Master clock duty cycle

50%

RESET pulse duration (see Note 11)

800

tsu(DX)

DX setup time before SCLK

↓

th(DX)

DX hold time after SCLK

↓

tc(SCLK)/4

NOTE 11: RESET pulse duration is the amount of time that the RESET is held below 0.8 V after the power supplies have

reached their recommended values.

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