Datasheet

AFE031
SBOS531D –AUGUST 2010–REVISED MAY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS: Digital
At T
J
= +25°C, PA_V
S
= 16 V, V
AVDD
= V
DVDD
= 3.3 V, and 10 kΩ connected to PA_ISET (pin 46), unless otherwise noted.
AFE031
PARAMETER CONDITIONS MIN TYP MAX UNIT
Digital Inputs (SCLK, DIN, CS, DAC, SD)
Leakage input current 0 ≤ V
IN
≤ DV
DD
–1 0.01 1 μA
Input logic levels
High-level input voltage V
IH
0.7 • DV
DD
V
Low-level input voltage V
IL
0.3 • DV
DD
V
SD pin high SD > 0.7 • DV
DD
AFE031 in shutdown
SD pin low SD < 0.3 • DV
DD
AFE031 in normal operation
DAC pin high DAC > 0.7 • DV
DD
SPI access to DAC Register
SPI access to Command and Data
DAC pin low DAC < 0.3 • DV
DD
Registers
Digital Outputs (DO, ZC_OUT)
V
O
High-level output voltage I
OH
= 3 mA DV
DD
– 0.4 DV
DD
V
H
Low-level output voltage V
OL
I
OL
= –3 mA GND GND + 0.4 V
Digital Outputs (INT, Tx_Flag, Rx_Flag)
High-level output current I
OH
V
OH
= 3.3 V 1 μA
Low-level output voltage V
OL
I
OL
= 4 mA 0.4 V
Low-level output current I
OL
V
OL
= 400 mV 4 mA
INT pin high (open drain) INT sink current < 1 μA Normal operation
INT pin low (open drain)
(1)
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 DV
DD
≥ 2 V 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.
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