SP8715IGMPAS Просмотр технического описания (PDF) - Mitel Networks

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SP8715IGMPAS

1100MHz Very Low Current Multi-Modulus Divider

Mitel Networks 

SP8715

Electrical Characteristics (Continued)

Guaranteed over the following conditions (unless otherwise stated):

VCC=+2.7V to +5.25V (with respect to VEE), Output load (pin 4) = 10pF, Tamb = -40°C to +85°C (note 2)

Characteristic

Min.

Value

Typ.

Max.

Units

Conditions

Output level (pin 4)

500

600

Modulus set-up time, ts (notes 5,6,8)

20

Modulus hold time, th (notes 6,8)

Power down time, tpd (notes 7,8)

Power down recovery time, tpu

(notes 7,8)

mV p-p

ns RF input = 1GHz

1

ns RF input = 1GHz

10

µs See Figure 9

6

µs See Figure 9

NOTES

2. All electrical testing is performed at +85°C.

3. Typical values are measured at +25°C and VCC = +5V.

4. Modulus Control and Ratio Select are high impedance inputs which can be driven directly by standard

CMOS outputs.

5. Modulus control is latched at the end of the previous cycle.

6. See Figure 4.

7. See Figure 8.

8. These parameters are not tested but are guaranteee by design.

9. The ratio select pin is not intended to be switched dynamically.

OPERATING NOTES

The RF inputs are biased internally and are normally

coupled to the signal source with suitable capaitors.

The output stage has a novel design and is intended

to drive a CMOS synthesiser input. External pull-down

resistors or circuits are not required. The SP8715 is

not suitable for driving TTL or similar devices.

The device will operate down to DC frequencies for

non-sinusoidal signals provided that the input slew

rate is better than 100V/µs.

POWER DOWN (pin 7) is connected internally to a

pull-down resistor. If the battery economy facility is not

used, pin 7 should be either left unconnected or

connected to VEE.

3

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