ACE9030IW Просмотр технического описания (PDF) - Mitel Networks

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производитель

ACE9030IW

Radio Interface and Twin Synthesiser

Mitel Networks 

ACE9030

ABSOLUTE MAXIMUM RATINGS

Supply voltage from ground

– 0·3 V to + 6·0 V

(any VDD to any VSS)

Supply voltage difference

– 0·3 V to + 0·3 V

(any VDD to any other VDD)

Input voltage

VSS – 0·3 V to VDD + 0·3 V

(any input pin to its local VSS and VDD)

Output voltage

VSS – 0·3 V to VDD + 0·3 V

(any output pin to its local VSS and VDD)

Storage temperature

– 55 °C to + 150 °C

Operating temperature

– 40 °C to + 85 °C

These are not the operating conditions, but are the

absolute limits which if exceeded even momentarily may

cause permanent damage. To ensure sustained correct op-

eration the device should be used within the limits given under

Electrical Characteristics.

To avoid any possibility of latch-up the substrate connec-

tions VDDSUB and VDDSUB2 must be the most positive of all VDD’s

at all times including during power on and off ramping. As the

current taken through these VDD’s is significantly less than

through the other VDD’s this requirement can be easily met by

directly connecting all VDD pins to a common point on the

circuit board but with the decoupling capacitors distributed to

minimise cross-talk caused by common mode currents. If low

value series resistors are to be included in the VDD connec-

tions, with decoupling capacitors by the ACE9030 pins to

further reduce interference, the VDDSUB and VDDSUB2 pins should

not have such a resistor in order to guarantee that their

voltage is not slowed down at power-on. Power switches to

DOUT0 and DOUT1 are supplied from VDDX and are specified

for a total current of up to 40 mA so any resistor in the VDDX

connection must be very low, around 1Ω, in order to avoid

excessive voltage drop; it is recommended that this supply

has no series resistor. These two methods are shown in circuit

diagrams, figures 4 and 5. In both circuits the main VDD must

also have good decoupling.

Main VDD

VDDSUB

VDDSUB2

VDDL

VDDA

VDDX

VDDD

VDDSA

Fig.4 Typical VDD local decoupling networks without series resistors

Main VDD

No Resistor

VDDSUB

No Resistor

VDDSUB2

VDDL

VDDA

Very

Small

VDDX

VDDD

VDDSA

Fig.5 Typical VDD local decoupling networks with series resistors

4

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