ANALOG DEVICES AD9901 Service Manual

Ultrahigh Speed

LOW­PASS

FILTER

1/N

VCO

AD9901

REFERENCE

INPUT

OSCILLATOR
OUTPUT

OPTIONAL 1/N PRESCALER

TYPICAL OF DIGITAL PLLs

a

FEATURES
Phase and Frequency Detection
ECL/TTL/CMOS Compatible
Linear Transfer Function
No “Dead Zone”
MIL-STD-883 Compliant Versions Available

APPLICATIONS
Low Phase Noise Reference Loops
Fast-Tuning “Agile” IF Loops
Secure “Hopping” Communications
Coherent Radar Transmitter/Receiver Chains

GENERAL DESCRIPTION

The AD9901 is a digital phase/frequency discriminator capable
of directly comparing phase/frequency inputs up to 200 MHz.
Processing in a high speed trench-oxide isolated process, com­bined with an innovative design, gives the AD9901 a linear
detection range, free of indeterminate phase detection zones
common to other digital designs.

With a single +5 V supply, the AD9901 can be configured to
operate with TTL or CMOS logic levels; it can also operate
with ECL inputs when operated with a –5.2 V supply. The
open-collector outputs allow the output swing to be matched to
post-filtering input requirements. A simple current setting resis­tor controls the output stage current range, permitting a reduc­tion in power when operated at lower frequencies.

Phase/Frequency Discriminator

AD9901

PHASE-LOCKED LOOP

A major feature of the AD9901 is its ability to compare
phase/frequency inputs at standard IF frequencies without
prescalers. Excessive phase uncertainty which is common with
standard PLL configurations is also eliminated. The AD9901
provides the locking speed of traditional phase/frequency dis­criminators, with the phase stability of analog mixers.

The AD9901 is available as a commercial temperature range

device, 0°C to +70°C, and as a military temperature device,
–55°C to +125°C. The commercial versions are packaged in a

14-lead ceramic DIP and a 20-lead PLCC.

The AD9901 Phase/Frequency Discriminator is available in
versions compliant with MIL-STD-883. Refer to the Analog
Devices Military Products Databook or current AD9901/883B
data sheet for specifications.

FUNCTIONAL BLOCK DIAGRAM

DQ

REFERENCE

INPUT

REFERENCE

INPUT

OSCILLATOR

INPUT

FLIP-FLOP

DQ

OSCILLATOR

FLIP-FLOP

Q

XOR

INPUT

Q

REV. B

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

DQ

REFERENCE

FREQUENCY

DISCRIMINATOR

FLIP-FLOP

DQ

OSCILLATOR
FREQUENCY

DISCRIMINATOR

FLIP-FLOP

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1999

Q

R

S

Q

OUTPUT

OUTPUT

AD9901–SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

1

Positive Supply Voltage (+VS for TTL Operation) . . . . . +7 V

Negative Supply Voltage (–V

for ECL Operation) . . . . . –7 V

S

Input Voltage Range (TTL Operation) . . . . . . . 0 V to +5.5 V

Differential Input Voltage (ECL Operation) . . . . . . . . . .4.0 V

Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mA

I

SET

Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA

ELECTRICAL CHARACTERISTICS

(ⴞVS = +5.0 V [for TTL] or –5.2 V [for ECL], unless otherwise noted)

Operating Temperature Range

AD9901KQ/KP . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Junction Temperature

2

Plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C

Ceramic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+175°C

Lead Soldering Temperature (10 sec) . . . . . . . . . . . . .+300°C

Commercial Temperature

0ⴗC to +70ⴗC

AD9901KQ/KP

Test

Temp Level Min Typ Max Units

INPUT CHARACTERISTICS

TTL Input Logic “1” Voltage Full VI 2.0 V
TTL Input Logic “0” Voltage Full VI 0.8 V
TTL Input Logic “1” Current
TTL Input Logic “0” Current

3

3

Full VI 0.6 mA
Full VI 1.6 mA

ECL Differential Switching Voltage Full VI 300 mV

ECL Input Current Full VI 20 µA

OUTPUT CHARACTERISTICS

Peak-to-Peak Output Voltage Swing

4

Full VI 1.6 1.8 2.0 V

TTL Output Compliance Range Full V 3–7 V

ECL Output Compliance Range Full V ±2V

Range Full V 0.9–11 mA

I

OUT

Internal Reference Voltage Full VI 0.42 0.47 0.52 V

AC CHARACTERISTICS

Linear Phase Detection Range

4

40 kHz +25°C V 360 Degrees
30 MHz +25°C V 320 Degrees
70 MHz +25°C V 270 Degrees

Functionality @ 70 MHz +25°C I Pass/Fail

POWER SUPPLY CHARACTERISTICS

TTL Supply Current (+5.0 V)

ECL Supply Current (–5.2 V)

5, 6

5, 6

+25°C I 43.5 54.0 mA

Full I 43.5 54.0 mA

+25°C I 42.5 52.5 mA

Full I 42.5 52.5 mA

Nominal Power Dissipation +25°C V 218 mW

NOTES

1

Absolute maximum ratings are limiting values, to be applied individually, and beyond which the service ability of the circuit may be impaired. Functional operability

is not necessarily implied. Exposure to absolute maximum rating conditions for an extended period of time may affect device reliability.

2

Maximum junction temperature should not exceed +175 °C for ceramic packages, +150°C for plastic packages. Junction temperature can be calculated by:

t

= PD (θ

J

where:

PD = power dissipation

θJA = thermal impedance from junction to air (°C/W)
θJC = thermal impedance from junction to case (°C/W)

t

= ambient temperature (°C)

A

t

= case temperature (°C)

C

typical thermal impedances:

AD9901 Ceramic DIP = θJA = 74°C/W; θJC = 21°C/W
AD9901 LCC = θJA = 80°C/W; θJC = 19°C/W
AD9901 PLCC = θJA = 88.2°C/W; θJC = 45.2°C/W

3

VL = +0.4 V; VH = +2.4 V.

4

R

= 47.5 Ω; RL = 182 Ω.

SET

5

lncludes load current of 10 mA (load resistors = 182 Ω).

6

Supply should remain stable within ±5% for normal operation.

Specifications subject to change without notice.

) +t

= PD (θ

JA

A

) +t

JC

C

REV. B–2–

S

+5.0V

0.47V

REFERENCE

TTL MODE = GROUND

ECL MODE = V

S

(–5.2V)

R

SET

TTL MODE = +VS (+5.0V)

ECL MODE = GROUND

AD9901

INPUT/OUTPUT EQUIVALENT CIRCUITS

(Based on DIP Pinouts)

VCO/REF, INPUT

DA3

V

MID

1kV

AD9901

5/12

VCO/REF, INPUT

VCO/REF, INPUT

4/13

3/14

–5.2V

TTL Input ECL Input Output

AD9901 BURN-IN CIRCUIT

(Based on DIP ECL Pinouts)

180V

50V

REG

0.01mF

–V

(–5.2V)

S

DIE LAYOUT AND MECHANICAL INFORMATION

GND (REFERENCE IN)

GND (REFERENCE IN)

GND (VCO IN)

REFERENCE IN (–VS)+VS (GND) OUTPUT

GND (–V

)

S

VS (–VS)

VCO IN (–V

)GND (VCO IN)

OUTPUT

R

SET

GND (–VS)

(GND)

+V

S

MID

180V

ALL RESISTORS 65%
ALL CAPACITORS 620%
ALL SUPPLY VOLTAGES 65%
V

= –1.3V 65%

MID

STATIC: DA2 = ECL HIGH; DA3 = ECL LOW
DYNAMIC: ECL HIGH

ORDERING GUIDE

Temperature Package Package

DA2

ECL HIGH

DA2

ECL LOW

ECL HIGH

DA3

ECL LOW

1kV

V

Model Ranges Descriptions Options

AD9901KQ 0°C to +70°C 14-Lead Cerdip Q-14
AD9901KP 0°C to +70°C 20-Lead Plastic Leaded Chip Carrier P-20A

AD9901TQ/883
AD9901TE/883

NOTE

1

For specifications, refer to Analog Devices Military Products Databook.

1

–55°C to +125°C 14-Lead Cerdip Q-14

1

–55°C to +125°C 20-Terminal Ceramic Leadless Chip Carrier E-20A

REV. B –3–

Die Dimensions . . . . . . . . . . . . . . . . . 63 × 118 × 16 (±2) mils

Pad Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 × 4 mils

Metalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum

Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . None

Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –V

Passivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nitride

Die Attach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gold Eutectic

Bond Wire . . . . . . . . 1.25 mil Aluminum; Ultrasonic Bonding

S