AD9901KQ 查看數據表（PDF） - Analog Devices

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AD9901KQ

Ultrahigh Speed Phase/Frequency Discriminator

Analog Devices 

AD9901

TTL/CMOS MODE FUNCTIONAL PIN DESCRIPTIONS

GROUND

Ground connections for AD9901. Connect

all grounds together and to low impedance

ground plane as close to the device as

possible.

+VS

Positive supply connection; nominally +5.0 V

for TTL operation.

BIAS

Connect to +VS (+5 V) for TTL operation.

VCO INPUT

OUTPUT

TTL compatible input; normally connected

to the VCO output signal. VCO INPUT and

REFERENCE INPUT are equivalent to one

another.

The noninverted output. In TTL/CMOS

mode, the output swing is approximately

+3.2 V to +5 V.

RSET

OUTPUT

External RSET connection. The current

through the RSET resistor is equal to the maxi-

mum full-scale output current. RSET should

be connected to ground through an external

resistor in TTL mode. ISET = 0.47 V/RSET =

ILOAD (max).

The inverted output. In TTL/CMOS mode,

the output swing is approximately +3.2 V to

+5 V.

REFERENCE

INPUT

TTL compatible input, normally connected

to the reference input signal. The VCO

INPUT and the REFERENCE INPUT are

equivalent.

+VS

R2

REFERENCE

OUTPUT +VS OUTPUT

R1

RSET

ECL MODE FUNCTIONAL PIN DESCRIPTIONS

–VS

Negative supply connection, nominally

–5.2 V for ECL operation.

BIAS

VCO INPUT

Connect to –5.2 V for ECL operation.

Inverted side of ECL compatible differential

input, normally connected to the VCO output

signal.

VCO INPUT

Noninverted side of ECL-compatible

differential input, normally connected to the

VCO output signal.

OUTPUT

The noninverted output. In ECL mode, the

output swing is approximately 0 V to –1.8 V.

GROUND

Ground connections for AD9901. Connect

all grounds together and to low-impedance

ground plane as close to the device as

possible.

RSET

OUTPUT

External RSET connection. The current

through the RSET resistor is equal to the maxi-

mum full-scale output current. RSET should

be connected to –VS through an external

resistor in ECL mode. ISET = 0.47 V/RSET =

ILOAD (max).

The inverted output. In ECL mode, the out-

put swing is approximately 0 V to –1.8 V.

REFERENCE

INPUT

REFERENCE

INPUT

Noninverted side of ECL-compatible

differential input, normally connected to the

reference input signal. The VCO INPUT and

the REFERENCE INPUT are equivalent to

one another.

Inverted side of ECL-compatible differential

input, normally connected to the reference

input signal. The VCO INPUT and the

REFERENCE INPUT are equivalent.

REFERENCE REFERENCE

INPUT

INPUT –VS

R2

OUTPUT

–VS

R1

RSET

AD9901

AD9901

REG

BIAS

+VS

VCO OUTPUT

+VS

INPUT

R3

+VS

Figure 1. TTL Mode (Based on DIP Pinouts)

REG

BIAS

–VS

VCO VCO –VS OUTPUT

INPUT INPUT

R3

Figure 2. ECL Mode (Based on DIP Pinouts)

–4–

REV. B

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