AFE031

SBOS531D – AUGUST 2010 – REVISED MAY 2012

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ELECTRICAL CHARACTERISTICS: Digital

AFE031

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Digital Inputs (SCLK, DIN, CS, DAC, SD)

Leakage input current

0

–1

0.01

1

μA

Input logic levels

High-level input voltage

V

Low-level input voltage

V

SD pin high

AFE031 in shutdown

SD pin low

AFE031 in normal operation

DAC pin high

SPI access to DAC Register

SPI access to Command and Data

DAC pin low

Registers

Digital Outputs (DO, ZC_OUT)

High-level output voltage

V

H

Low-level output voltage

GND

GND + 0.4

V

Digital Outputs (INT, Tx_Flag, Rx_Flag)

High-level output current

1

μA

Low-level output voltage

0.4

V

Low-level output current

4

mA

INT pin high (open drain)

INT sink current < 1

μA

Normal operation

INT < 0.4 V

Indicates an interrupt has occurred

Tx_Flag high (open drain)

Tx_Flag sink current < 1

μA

Indicates Tx block is ready

Tx_Flag low (open drain)

Tx_Flag < 0.4 V

Indicates Tx block is not ready

Rx_Flag high (open drain)

Rx_Flag sink current < 1

μA

Indicates Rx block is ready

Rx_Flag low (open drain)

Rx_Flag < 0.4 V

Indicates Rx block is not ready

DIGITAL TIMING

Gain Timing

Gain select time

0.2

μs

Shutdown Mode Timing

Enable time

4.0

μs

Disable time

2.0

μs

POR Timing

Power-On Reset power-up time

50

μs

(1)

When an interrupt is detected (INT pin low), the contents of the I_Flag and T_Flag Registers can be read to determine the reason for the

interrupt.

8

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