© 1999 Consumer Microcircuits Limited

12

D/663/3

Operating Characteristics

For the following conditions unless otherwise specified:

Xtal Frequency = 3.579545MHz

0dB = 775 mVrms, S/N = 20dB

Noise Bandwidth = 5kHz Band Limited Gaussian

Notes

Min.

Typ.

Max.

Units

DC Parameters

1, 2

-

30

-

µA

1

-

0.5

1

mA

1

-

1.0

2

mA

Logic Interface

Input Logic '1'

70%

-

-

Input Logic '0'

-

-

30%

Input Leakage Current (Logic '1' or '0')

-1.0

-

1.0

µA

Input Capacitance

-

-

7.5

pF

90%

-

-

-

-

10%

'Off' State Leakage Current

3

-

-

10.0

µA

AC Parameters

SIGIN Pin

Input Impedance

4

-

0.35

-

M

Ω

Minimum Input Signal Level

-

-40.0

-

dB

Input Signal Dynamic Range

40.0

-

-

dB

Level Detector

Detection Signal Level

(measured at AMPOP pin)

5

-

-19.0

-

dB

OPAMP

Input Impedance

6

10.0

-

-

M

Ω

Voltage gain

-

500

-

V/V

Xtal/Clock Input

Pulse Width ('High' or 'Low')

7

40.0

-

-

ns

Input Impedance (at 100Hz)

10.0

-

-

M

Ω

Gain (I/P = 1mV rms at 1kHz)

20.0

-

-

dB

Notes:

1.

Not including any current drawn from the device pins by external circuitry.

2.

3.

IRQN pin, D0 to D3 pins.

4.

Small signal impedance over the frequency range 100Hz to 2300Hz and at 5.0V.

5.

Input signal level is multiplied by the voltage gain (-R2/R1). The overall signal should be

6.

Open loop, small signal low frequency measurements.

7.

Timing for an external input to the XTAL/CLOCK pin.