MICRF009 datasheet(9/16 Pages) MICREL

Part #	MICRF009

Description	QwikRadio Low-Power UHF Receiver

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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9 / 16 page

Micrel

MICRF009

January 18, 2005

M9999-011805

(408) 955-1690

CAGC = AGC capacitor value

∆t = droop recovery time

∆V = droop voltage

For example, if user desires

∆t = 10ms and chooses a

4.7µF CAGC, then the allowable droop is about 144mV.

Using the same equation with 200nA, the worst-case pin

leakage, and assuming 1µA of capacitor leakage in the

same direction, the maximum allowable

∆t (shutdown time)

is about 0.56s for droop recovery in 10ms.

The ratio of decay-to-attack time-constant is fixed at 1:10

(that is, the attack time constant is 10 times of the decay

time constant). Generally the design value of 1:10 is

adequate for the vast majority of applications. If adjustment

is required, adding a resistor in parallel of the CAGC

capacitor may vary the ratio. The value of the resistor must

be determined on a case-by-case basis.

MICRF009 Datasheet(PDF) 9 Page - Micrel Semiconductor