M685 datasheet(3/7 Pages) ICST

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M685 Datasheet Rev 0.4

3 of 7

Revised 16Nov2004

Integr ated Circuit Systems , Inc. ● Netw o r ki ng & C o mmun ica t io ns ● ww w. icst.com ● tel (5 08) 85 2-54 00

M685

DUAL SAW, SELECTABLE FREQUENCY VCSO

Preliminar y In f o r m atio n

Integrated

Circuit

Systems, Inc.

ELECTRICAL SPECIFICATIONS FOR M685-01

DC Characteristics for M685-01

Unless stated otherwise, V

CC = 3.3 Volts + 10%, TA = 0 to 85

oC, VCSO Freq.’s = 155.52, 167.3316MHz, Outputs terminated into 180Ω to ground

Symbol Parameter

Min

Typ

Max

Unit

Power Supply V

Positive Supply Voltage

VCC

2.97

3.3

3.63

Power Supply Current

125

Control

Voltage

Input Control Voltage Range

VIN

3.3

IN Input Impedence

100

Ω

Frequency

Select1

Note 1: Internally pulled down to Logic 0 (Frequency 1) if left unselected.

Input High Voltage

F_SEL

Vcc + 0.3 V

Input Low Voltage

-0.3

0.8

Input High Current

µA

Input Low Current

-150

µA

Rpulldown Internal Pull-down Resistor

Ω

Differential

Outputs

Output High Voltage

FOUT, nFOUT

Vcc - 0.98

Vcc - 0.75 V

Output Low Voltage

Vcc - 1.95

Vcc - 1.63 V

-P

Peak to Peak Output Voltage2

Note 2: Single-ended measurement. See Figure 3, Output Rise and Fall Time, on pg. 5.

0.450

0.625

0.85

-P

OUT

Output Current

Table 5: DC Characteristics for M685-01

AC Characteristics for M685-01

Unless stated otherwise, V

CC = 3.3 Volts + 10%, TA = 0 to 85

oC, VCSO Freq.’s = 155.52, 167.3316MHz, Outputs terminated into 180Ω to ground

Symbol Parameter

Min

Typ

Max

Unit Notes

Control Voltage V

Modulation Bandwidth

VIN

600

kHz

Output

OUT

Output Center Frequency Range M685-01

125

175

MHz

APR

Absolute (Guaranteed) Pull-Range 1

Note 1: Also fully meets ±50 ppm minimum pull-range specification that is commonly required.

±120

ppm

STAB

Frequency Stability

100

ppm p-p At any givin VIN

Tuning Linearity

VIN = 0.3 to 3.0V

Best fit straight line

VCO

VCO Gain

@155.52MHz

400

ppm/V VIN = 0.3 to 3.0V

Non-harmonic Spurious

-50

-77

dBc

Φn

SSB (single sideband)

Phase Noise, offset

from carrier

@155.52MHz

100Hz Offset

-48

dBc/Hz

1kHz Offset

-75

dBc/Hz

10kHz Offset

-99

dBc/Hz

100kHz Offset

-124

dBc/Hz

1MHz Offset

-142

dBc/Hz

J(t)

Jitter (rms)

@155.52MHz

12kHz to 20MHz

0.30

ps rms

50kHz to 80MHz

0.18

ps rms

odc

Output Duty Cycle 2

Note 2: See Parameter Measurement Information on pg. 5.

Output Rise Time 2 for FOUT, nFOUT

275

425

% to 80%

Output Fall Time 2 for FOUT, nFOUT

275

425

% to 80%

Table 6: AC Characteristics for M685-01

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