AMC7832_15 Datasheet, PDF (59/72 Pages) Texas Instruments – AMC7832 12-Bit Analog Monitor and Control Solution with Multi-Channel ADC, Bipolar DACs, Temperature Sensor and GPIO Ports

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AMC7832
SLAS836 – MARCH 2014
10 Power Supply Recommendations
The preferred (not required) order for applying power is IOV_DD, DV_DD/AV_DD and then AV_CC/AV_EE. When power
sequencing, ensure that all digital terminals are not powered, or in an active state while IOV_DD ramps. This can
be accomplished by attaching 10-kΩ pull-up resistors to IOV_DD, or pull-down resistors to DGND.
The supply voltage ranges are specified in the Recommended Operating Conditions but are repeated here for
convenience.
PARAMETER
SUPPLY VOLTAGE RANGE
AV_DD
DV_DD
IOV_DD
AV_CC
AV_EE
AVSS_A,B,C,D
OPERATING RANGE
Specified temperature
range
TEST CONDITIONS
DV_DD must be equal to AV_DD
IOV_DD must be equal or less than DV_DD
MIN
4.5
4.5
1.8
4.5
–12.5
AV_EE
–40
TYP
MAX UNIT
5
5.5 V
5
5.5 V
5.5 V
12
12.5 V
–12
0V
0V
25
105 °C
All registers initialize to the default values after these supplies have been established. Communication with the
AMC7832 will be valid after a 250-µS maximum power-on reset delay. The default state of all analog blocks is off
as determined by the power-down registers (0xB2 and 0xB3). Before writing to this register, a hardware reset
should be issued to ensure specified operation of the AMC7832. Communication to the AMC7832 will be valid
after a maximum 250-µS reset delay from the rising edge of RESET.
If DV_DD falls below +4.5-V, the minimum supply value of DV_DD, either a hardware or power-on reset should be
issued before proper operation can be resumed.
When powered on, the internal POR circuit invokes a power-on reset, which performs the equivalent function of
the RESET terminal. To ensure a POR, DV_DD must start from a level below 750-mV.
Copyright © 2014, Texas Instruments Incorporated
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