Datasheet SP8713 Datasheet (MITEL)

CC

Q

CC

O

O

C

C

Q

C

RF INPUT

V

MODULUS CONTROL 1

OUTPUT

1100MHz Very Low Current Three Modulus Divider

The SP8713 is a switchable divide by 64/65/72
programmable divider which is guaranteed to operate up to
1100MHz. It will operate from a supply of 2.7V to 5.25V and
requires typically 4.1mA (including the output current). It also
features a power down facility for battery economy.

The RF inputs are internally biased and should be capacitively
coupled to the signal source. The output is designed to interface
with CMOS synthesisers, such as the NJ88C50.

FEATURES

■ Operation to 1100MHz

■ Very Low Power

■ Single Supply Operation 2.7V to 5.25V

■ Power Down Facility for Battery Economy

■ Latched Modulus Control Inputs

■ Push Pull Output Drive

■ ESD Protection on All Pins

†

SP8713

DS3934 - 4.0 November 1997

1 8

CC

2 7

SP8713

3 6
4 5

Fig. 1 Pin connections - top view

RF INPUT

POWER DOWN

MODULUS CONTROL 2

V

EE

SP8713

MP8

APPLICATIONS

■ Cellular Telephones

■ Cordless Telephones

■ Mobile Radio

†

ESD precautions must be observed

6

1

M

3

2

M

RF
INPUT
(CLOCK)

1

8

V

D

D

D TYPE

D TYPE

K

D TYPE

ORDERING INFORMATION

SP8713 IG MPAS Industrial Temperature Range
SP8713 IG MPAC As above supplied on Tape and Reel

CONTROL

LOGIC

DIVIDE BY

4 / 5

DIVIDE BY

Miniature Plastic DIL Package

V

2

250K
NOMINAL

BIAS

16

7

P
DOWN

5

4

V

EE

UTPUT

WER

V

EE

Fig. 2 Block diagram

1

SP8713

ABSOLUTE MAXIMUM RATINGS

Supply voltage (VEE=0V) (note 1) -0.5V to 7V

Control and RF inputs,

RF output (V

RF input current (note 1) 10mA

Operating temperature -40°C to +85°C

Storage temperature range -55°C to +150°C

Maximum junction temperature +150°C

NOTE 1. Duration <2 minutes.

ELECTRICAL CHARACTERISTICS

Guaranteed over the following conditions (unless otherwise stated):

VCC=+2.7V to +5.25V (with respect to VEE), Output load (pin 4) = 10pF, T

=0V) (note 1)-0.5V to VCC+0.5V

EE

= -40°C to +85°C (note 2)

amb

Characteristic Units Conditions

Value

Min. Typ. Max.

Supply current (note 3) 4.1 4.7 mA Power down input low
Supply current (note 3) 8 50 µA Power down input high
Power down high VCC-0.5 V

CC

V
Power down low 0 VCC-2.0 V
Modulus control 1 high (note 4) 0.6V

CC

Modulus control 1 low (note 4) 0 0.4V
Modulus control 2 high (note 4) 0.6V

CC

Modulus control 2 select low (note 4) 0 0.4V

V

CC

CC

V

CC

CC

V Divide by 64 or 72

V Divide by 65 or 72

V Divide by 72

V Divide by 64 or 65
Max. sinewave input frequency 1100 MHz See Figure 5
Min. sinewave input frequency 200 MHz See Figure 5
Min. RF input voltage 50 mV RMS RF input 200MHz to

1100MHz. See Figure 5

Max. RF input voltage 200 mV RMS RF input 200MHz to

1100MHz. See Figure 5

Output level (pin 4) 500 600 mV p-p
Modulus set-up time, t
Modulus hold time, t
Power down time, t

h

pd

(notes 5,6,8) 20 ns RF input = 1GHz

s

(notes 6,8) 1 ns RF input = 1GHz
(notes 7,8) 10 µs See Figure 9

Power down recovery time, tpu(notes 7,8) 6 µs See Figure 9

NOTES

2. All electrical testing is performed at +85°C.

3. Typical values are measured at +25°C and V

= +5V.

CC

4. Modulus Control and Ratio Select are high impedance inputs which can be driven directly by standard CMOS outputs.

5. Modulus control is latched at the end of the previous cycle.

6. See Figure 4.

7. See Figure 8.

8. These parameters are not tested but are guranteed by design.

2

SP8713

O

S

O

OPERATING NOTES

The RF inputs are biased internally and are normally coupled to the signal source with suitable capacitors.
The output stage has a novel design and is intended to drive a CMOS synthesiser input. External pull-down resistors or

circuits are not required. The SP8713 is

The device will operate down to DC frequencies for non-sinusoidal signals provided that the input slew rate is better than

100V/µs.

POWER DOWN (pin 7) is connected internally to a pull-up resistor. If the battery economy facility is not used, pin 7 should

be connected to V

EE

.

not suitable for driving TTL or similar devices.

1000

Modulus Modulus Division

Control 1 Control 2 Ratio

(Pin 3) (Pin 6)

LL65
HL64
HH72

LH72

Table 1 Truth table

RF INPUT

CLOCK

DULU

M
CONTROL

INPUTS

800

600

400

RF INPUT VOLTAGE (mV RMS)

200

0

200 400 600 800 1000 1200

GUARANTEED*

OPERATING WINDOW

OVERLOAD

SENSITIVITY

FREQUENCY (MHZ)

* Tested as specified in table of Electrical Characteristics

Fig. 3 Typical input characteristics

DON'T CAREDON'T CARE

TYPICAL

TYPICAL

UTPUT

t

s

t

h

32 or 36 32, 33 or 36

Fig. 4 Modulus control timing diagram

3

SP8713

CC

CC

O

C

O

O

S

C

O

S

MONITOR

V

100n

50Ω

50Ω

SIGNAL

SOURCE

1n

1n

10n 10n

CONTROL 1 INPUT

V

RF INPUT

RF INPUT

DULU

M

SP8713

MODULU

CONTROL 2 INPUT

V

EE

P

WER

DOWN

UTPUT

2MC 1

M

Fig. 5 Toggle frequency test circuit

j1

UTPUT

L

S11
PLOT 50 OHM
NORMALISED

f1: 130MHz
f2: 1310MHz

j0.5

j0.2

0.2 0.5 1 2

-j0.2

f2

-j0.5 -j2

-j1

Fig. 6 Typical S11 parameter for pin 1. VCC = +5.0V

j2

f1

4

300

200

R( )

R(Ω)

100

-100

SP8713

0

-200

-300

jx ( )

jx(Ω)

-400

-500

-600

-700

-800
100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400

INPUT FREQUENCY (MHz)

Fig. 7 Typical input impedance v. frequency

5

SP8713

FREQ-MHZ

130.000

153.600

177.200

200.800

224.400

248.000

271.600

295.200

318.800

342.400

366.000

389.600

413.200

436.800

460.400

484.000

507.600

531.200

554.800

578.400

602.000

625.600

649.200

672.800

696.400

720.000

743.600

767.200

790.800

814.400

838.000

861.600

885.200

908.800

932.400

956.000

979.600

1003.20

1026.80

1050.40

1074.00

1097.60

1121.20

1144.80

1168.40

1192.00

1215.60

1239.20

1262.80

1286.40

1310.00

R (Ω)

255.068

153.362

153.330

115.187

88.649

80.815

71.050

56.207

39.526

41.338

38.779

39.210

23.809

21.221

27.545

23.333

22.227

19.931

17.767

17.636

14.607

12.479

13.075

12.891

12.583

11.250

10.213

10.187

11.269

11.081

10.509

10.063

10.172

10.745

10.841

10.884

12.260

12.984

14.508

16.625

19.260

22.799

23.285

21.149

18.956

16.434

14.377

13.743

12.711

12.776

12.598

jx (Ω)

-733.538

-688.623

-583.339

-545.839

-482.377

-441.798

-411.502

-369.645

-346.620

-323.129

-304.804

-280.556

-269.674

-255.279

-245.161

-234.680

-224.572

-211.375

-203.241

-194.613

-186.545

-182.049

-174.839

-168.320

-160.468

-156.267

-149.642

-145.328

-143.144

-137.557

-132.750

-129.254

-124.495

-120.568

-118.100

-113.395

-109.552

-105.975

-103.110

-99.886

-98.149

-98.605

-99.907

-100.925

-99.639

-98.425

-95.033

-92.553

-89.249

-86.081

-82.581

Table.2 Coefficients for Fig.7

6

SP8713

C

O

S

OSC

OSCO

VOLTAGE

V - 0.5V

CC

V - 2.0V

CC

POWER

DOWN
INPUT

VOLTAGE

t

pu

SUPPLY

CURRENT

TIME

Fig. 8 Power up and power down

CURRENT

I

0.95

C

I

0.05

t

pd

C

GENERATOR

WER

P
SUPPLY

PUL

INPUT

E

47Ω

8

SP8713

1

+

-

PROBE POINT

URRENT SENSE

ILL

RESISTOR

PE

10nF

Fig. 9 Power-down time test circuit

7

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