over recommended operating conditions (unless otherwise noted)
PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNIT |
General |
CVDDIO(1)(2) |
VDDIO Capacitance Per Pin(7) |
|
0.1 |
|
|
uF |
CVDDA(1)(2) |
VDDA Capacitance Per Pin(7) |
|
2.2 |
|
|
uF |
SRVDD33(3) |
Supply Ramp Rate of 3.3V Rails (VDDIO, VDDA) |
|
20 |
|
100 |
mV/us |
VBOR-VDDIO-GB(5) |
VDDIO Brown Out Reset Voltage Guard Band |
|
|
0.1 |
|
V |
External VREG |
CVDD TOTAL(1)(4) |
Total VDD Capacitance(7) |
|
|
10 |
|
uF |
SRVDD12(3) |
Supply Ramp Rate of 1.2V Rail (VDD) |
|
10 |
|
100 |
mV/us |
VDDIO - VDD Delay(6) |
Ramp Delay Between VDDIO and VDD |
|
0 |
|
|
us |
Internal VREG |
CVDD TOTAL(1)(4) |
Total VDD Capacitance(7) |
|
|
10 |
|
uF |
(1) A bulk capacitor should also be used. The exact value of the decoupling capacitance depends on the system voltage regulation solution that is supplying these pins.
(2) It is recommended to tie the 3.3V rails (VDDIO, VDDA) together and supply them from a single source.
(3) See the Supply Slew Rate section. Supply ramp rate faster than the maximum can trigger the on-chip ESD protection.
(4) See the Power Management Module (PMM) section on possible configurations for the total decoupling capacitance.
(5) TI recommends VBOR-VDDIO-GB to avoid BOR-VDDIO resets due to normal supply noise or load-transient events on the 3.3-V VDDIO system regulator. Good system regulator design and decoupling capacitance (following the system regulator specifications) are important to prevent activation of the BOR-VDDIO during normal device operation. The value of VBOR-VDDIO-GB is a system-level design consideration; the voltage listed here is typical for many applications.
(6) Delay between when the 3.3-V rail ramps up and when the 1.2-V rail ramps up. See the VREG Sequence Summary table for the allowable supply ramp sequences.
(7) Max capacitor tolerance should be 20%.