AFE4490 datasheet(6/69 Pages) TI

6 / 69 page

AFE4400

SBAS601D – DECEMBER 2012 – REVISED MAY 2013

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

Minimum and maximum specifications are at TA = –20°C to +85°C. Typical specifications are at +25°C.

All specifications are at RX_ANA_SUP = RX_DIG_SUP = 3 V, TX_CTRL_SUP = LED_DRV_SUP = 3.3 V, and fCLK = 8 MHz,

unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

EXTERNAL CLOCK

Maximum allowable external clock jitter

External clock input frequency

±10%

MHz

Voltage input high (VIH)

0.75 × RX_DIG_SUP

External clock input voltage

Voltage input low (VIL)

0.25 × RX_DIG_SUP

TIMING

Wake-up time from complete power-down

1000

Wake-up time from Rx power-down

100

µs

Wake-up time from Tx power-down

1000

tRESET

Active low RESET pulse duration

DIAG_END pulse duration at the completion of

CLKOUT

tDIAGEND

diagnostics

cycles

CLKOUT

tADCRDY

ADC_RDY pulse duration

cycle

DIGITAL SIGNAL CHARACTERISTICS

AFE_PDN, SCLK, SPISIMO, SPISTE,

DVDD +

VIH

Logic high input voltage

0.8 DVDD

> 1.3

RESET

0.1

AFE_PDN, SCLK, SPISIMO, SPISTE,

VIL

Logic low input voltage

–0.1

< 0.4

0.2 DVDD

RESET

IIN

Logic input current

0 V < VDigitalInput < DVDD

–10

µA

DIAG_END, LED_ALM, PD_ALM, SPISOMI,

> (RX_DIG_SUP –

VOH

Logic high output voltage

0.9 DVDD

ADC_RDY, CLKOUT

0.2 V)

DIAG_END, LED_ALM, PD_ALM, SPISOMI,

VOL

Logic low output voltage

< 0.4

0.1 DVDD

ADC_RDY, CLKOUT

SUPPLY CURRENT

RX_ANA_SUP = 3.0 V, with 8-MHz clock

0.6

running, Rx stage 2 disabled

Receiver analog supply current

RX_ANA_SUP = 3.0 V, with 8-MHz clock

0.7

running, Rx stage 2 enabled

Receiver digital supply current

RX_DIG_SUP = 3.0 V

0.27

LED_DRV

LED driver supply current

With zero LED current setting

µA

_SUP

TX_CTRL

Transmitter control supply current

µA

_SUP

Receiver current only

µA

(RX_ANA_SUP)

Receiver current only

µA

(RX_DIG_SUP)

Complete power-down (using AFE_PDN pin)

Transmitter current only

µA

(LED_DRV_SUP)

Transmitter current only

µA

(TX_CTRL_SUP)

Receiver current only

220

µA

(RX_ANA_SUP)

Power-down Rx alone

Receiver current only

220

µA

(RX_DIG_SUP)

Transmitter current only

µA

(LED_DRV_SUP)

Power-down Tx alone

Transmitter current only

µA

(TX_CTRL_SUP)

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