TRF2056

LOW VOLTAGE 1.2 GHz FRACTIONAL N/INTEGER N SYNTHESIZER

SLWS111 NOVEMBER 2000

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

1.2-GHz Operation

Two Operating Modes:
Philips SA7025 Emulation Mode

Terminal-for-Terminal and Programming
Compatible

 Extended Performance Mode (EPM)

Dual RF-IF Phase-Locked Loops

Fractional-N or Integer-N Operation

Programmable EPM Fractional
Modulus of 116

Normal, Speed-Up, and Fractional
Compensation Charge Pumps

Low-Power Consumption

description

The TRF2056 device is a low-voltage, low-power consumption 1.2-GHz fractional-N/integer-N frequency
synthesizer component for wireless applications. Fractional-N division and an integral speed-up charge pump
achieve rapid channel switching. Two operating modes are available: 1) SA7025 emulation mode in which the
device emulates the Philips SA7025 fractional-N synthesizer and 2) extended performance mode (EPM), which
provides additional features, including fractional accumulator modulos from 1 to 16 (compared to only 5 or 8
for the SA7025 synthesizer).

The TRF2056 device provides external loop filters and all functions necessary for voltage-controlled oscillator
(VCO) control in a dual phase-locked loop (PLL) frequency synthesizer system. A main channel is provided for
radio frequency (RF) channels and an auxiliary channel for intermediate frequency (IF) channels. The
current-output charge pumps directly drive passive resistance-capacitance (RC) filter networks to generate
VCO control voltages. Rapid main-channel frequency switching is achieved with a charge pump arrangement
that increases the current drive and alters the loop-filter frequency response during the speed-up mode portion
of the switching interval.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

CLOCK

DATA

STROBE

RFIN
RFIN

CCP

REFIN

AUXIN

TSETUP
LOCK/TEST
RF
RN
V

DDA

PHP
PHI
V

SSA

PHA

PW PACKAGE

(TOP VIEW)

2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

TRF2056

LOW VOLTAGE 1.2 GHz FRACTIONAL N/INTEGER N SYNTHESIZER

SLWS111 NOVEMBER 2000

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

functional block diagram

Serial Control Shift Registers

Common Registers

EPM Registers SA7025 Registers

Conversion and Selection

CLOCK

STROBE

Fractional

Accumulator

FMOD

Fractional

Compensation

Control Lines

Compensation

Charge Pump

Phase

Detector

Proportional

Charge Pump

Reference

Divider

Integral

Charge Pump

Phase

Detector

Auxiliary

Charge Pump

Auxiliary

Divider

4/1

REFIN

AUXIN

PHI

LOCK/
TEST

PHA

Main Divider

(N/N+1)

RFIN

32/33
Prescaler

PHP

Select

DATA

Terminals 4, 7, 12, 15, and 20 are for supply voltage. Terminal 19 is for testing. These terminals are not shown.
Conversion and selection block provides emulation of SA7025 64/65/72 triple-modulus prescaler operation using the TRF2056 32/33

dual-modulus prescaler.

EM+EA

TRF2056

LOW VOLTAGE 1.2 GHz FRACTIONAL N/INTEGER N SYNTHESIZER

SLWS111 NOVEMBER 2000

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

ÁÁÁÁ

AUXIN

ÁÁÁ

ÁÁ

Auxiliary channel RF input

ÁÁÁÁ

CLOCK

ÁÁÁ

ÁÁ

Serial interface clock signal

ÁÁÁÁ

DATA

ÁÁÁ

ÁÁ

Serial interface data signal

ÁÁÁÁ

ÁÁ

ÁÁÁÁ

LOCK/
TEST

ÁÁÁ

ÁÁ

ÁÁÁ

ÁÁ

Lock detector/test mode output

ÁÁÁÁ

PHA

ÁÁÁ

ÁÁ

Auxiliary charge pump output

ÁÁÁÁ

PHI

ÁÁÁ

ÁÁ

Integral charge pump output

ÁÁÁÁ

PHP

ÁÁÁ

ÁÁ

Proportional charge pump output

ÁÁÁÁ

ÁÁÁ

ÁÁ

Resistor to VSSA sets auxiliary charge pump reference current

ÁÁÁÁ

REFIN

ÁÁÁ

ÁÁ

Reference frequency input signal

ÁÁÁÁ

ÁÁÁ

ÁÁ

Resistor to VSSA sets compensation charge pump reference current

ÁÁÁÁ

RFIN

ÁÁÁ

ÁÁ

Prescaler positive RF input

ÁÁÁÁ

RFIN

ÁÁÁ

ÁÁ

Prescaler negative RF input

ÁÁÁÁ

ÁÁÁ

ÁÁ

Resistor to VSSA sets proportional and integral charge pump reference current

ÁÁÁÁ

STROBE

ÁÁÁ

ÁÁ

Serial interface strobe signal

ÁÁÁÁ

ÁÁ

ÁÁÁÁ

TSETUP

ÁÁÁ

ÁÁ

ÁÁÁ

ÁÁ

Test setup for terminal 18. For lock detect output, terminal 19 connects to VCC through a pullup resistor; for test mode
output, terminal 19 terminates to ground.

ÁÁÁÁ

VCCP

ÁÁÁ

ÁÁ

Prescaler positive supply voltage

ÁÁÁÁ

VDD

ÁÁÁ

ÁÁ

Digital supply voltage

ÁÁÁÁ

VDDA

ÁÁÁ

ÁÁ

Analog supply voltage

ÁÁÁÁ

VSS

ÁÁÁ

ÁÁ

Digital ground

ÁÁÁÁ

VSSA

ÁÁÁ

ÁÁ

Analog ground

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, V

CCP,

, V

DDA

(see Note 1)

0.6 V to 5.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, logic signals

0.6 V to 5.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating ambient temperature range, T

C to 85

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

C to 150

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under

recommended operating conditions is not implied.

Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: Voltage values are with respect to VSSA.

TRF2056

LOW VOLTAGE 1.2 GHz FRACTIONAL N/INTEGER N SYNTHESIZER

SLWS111 NOVEMBER 2000

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

recommended operating conditions

MIN

NOM

MAX

UNIT

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Supply voltage, VDDA

ÁÁÁÁ

3.3

ÁÁÁ

ÁÁÁÁÁ

3.9

ÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Supply voltage, VCCP

VDD

ÁÁÁÁ

2.9

ÁÁÁ

3.3

ÁÁÁÁÁ

3.9

ÁÁÁ

Operating free-air temperature, TA

dc electrical characteristics V

= V

DDA

= V

CCP

3.3 V, T

=25

internal registers: CN = 128, CL = 1, CK = 3, PA = 1
external components: RN = 18 k

, RF = 20 k

, RA = 100 k

(unless otherwise noted)

supply current: I = I

+ I

CCP

+ I

DDA

PARAMETER

TEST CONDITIONS

ÁÁÁ

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁÁ

ISTANDBY

Total standby supply currents

EM = EA = 0 (see Note 2)

ÁÁÁ

200

ÁÁÁ

ÁÁÁÁÁ

IMAIN

Operational supply currents

EM = 1, EA = 0

ÁÁÁ

7.0

ÁÁÁ

ÁÁÁÁÁ

IAUX

Operational supply currents

EM = 0, EA = 1

ÁÁÁ

1.5

ÁÁÁ

ÁÁÁÁÁ

ITOTAL

Operational supply currents

ÁÁÁÁÁÁÁÁÁÁ

EM = EA = 1

ÁÁÁ

7.5

ÁÁÁ

NOTE 2: VRN = VRA = VRF = VDDA

digital interface

PARAMETER

MIN

TYP

MAX

UNIT

VIH

High-level input voltage

DATA CLOCK STROBE

0.7 VDD

VDD + 0.3

VIL

Low-level input voltage

DATA, CLOCK, STROBE

0.3

0.3 VDD

IIH

High-level input current

DATA CLOCK STROBE

IIL

Low-level input current

DATA, CLOCK, STROBE

charge pump currents (see Figure 1)

auxiliary charge pump

PARAMETER

ÁÁÁÁÁÁÁ

TEST CONDITIONS

ÁÁÁ

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁÁ

|IPHA|

Output current PHA

ÁÁÁÁÁÁÁ

VPHA = 0.5 VDDA

ÁÁÁ

200

ÁÁÁ

250

ÁÁÁ

300

ÁÁÁ

ÁÁÁÁÁ

ÁÁÁ

ÁÁÁÁÁ

IPHA

|IPHA|

Relative output current variation PHA (see Figure 1)

ÁÁÁÁÁÁÁ

ÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁ

10%

ÁÁÁ

ÁÁÁÁÁ

IPHA

Output current matching PHA (see Figure 1)

ÁÁÁÁÁÁÁ

VPHA = 0.5 VDDA

ÁÁÁ

proportional charge pump

normal mode, V

= V

DDA

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

PARAMETER

ÁÁÁÁÁÁÁ

TEST CONDITIONS

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁÁ

|IPHP-NM|

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Output current PHP

ÁÁÁÁÁÁÁ

VPHP = 0.5 VDDA

400

ÁÁÁ

500

ÁÁÁ

600

ÁÁÁ

ÁÁÁÁÁ

ÁÁÁ

ÁÁÁÁÁ

IPHP-NM

|IPHP-NM|

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Relative output current variation PHP (see Figure 1)

ÁÁÁÁÁÁÁ

ÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁ

10%

ÁÁÁ

ÁÁÁÁÁ

IPHP-NM

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Output current matching PHP (see Figure 1)

ÁÁÁÁÁÁÁ

VPHP = 0.5 VDDA

ÁÁÁ

TRF2056

LOW VOLTAGE 1.2 GHz FRACTIONAL N/INTEGER N SYNTHESIZER

SLWS111 NOVEMBER 2000

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

charge pump currents (see Figure 1) (continued)

proportional charge pump

speed-up mode, V

= V

DDA

(see

speed-up mode operation)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

PARAMETER

TEST CONDITIONS

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁÁ

|IPHP-SM|

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Output current PHP

VPHP = 0.5 VDDA

ÁÁÁ

2.5

ÁÁÁ

ÁÁÁÁÁ

ÁÁÁ

ÁÁÁÁÁ

IPHP-SM

|IPHP-SM|

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Relative output current variation PHP (see Figure 1)

ÁÁÁ

10%

ÁÁÁ

ÁÁÁÁÁ

IPHP-SM

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Output current matching PHP (see Figure 1)

VPHP = 0.5 VDDA

ÁÁÁ

300

ÁÁÁ

integral charge pump, speed-up mode, V

= V

DDA

(see

speed-up mode operation)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

PARAMETER

TEST CONDITIONS

ÁÁÁ

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁÁ

|IPHI-SM|

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Output current PHI

VPHI = 0.5 VDDA

ÁÁÁ

4.8

ÁÁÁ

7.2

ÁÁÁ

ÁÁÁÁÁ

ÁÁÁ

ÁÁÁÁÁ

IPHI-SM

|IPHI-SM|

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Relative output current variation PHI (see Figure 1)

ÁÁÁ

ÁÁÁÁÁ

IPHI-SM

Output current matching PHI (see Figure 1)

VPHI = 0.5 VDDA

ÁÁÁ

600

ÁÁÁ

fractional compensation proportional charge pump, normal mode, V

= V

DDA

PARAMETER

TEST CONDITIONS

ÁÁÁ

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁÁ

ÁÁÁ

ÁÁÁÁÁ

|IPHP-F-NM|

Output current PHP vs fractional numerator
(see Note 3)

VPHP = 0.5 VDDA, FNUM = 1

ÁÁÁ

1.25

ÁÁÁ

NOTE: 3. Fractional compensation current is proportional to the numerator content of the fractional accumulator (FNUM).

charge pump leakage currents,

= V

DDA

PARAMETER

ÁÁÁÁÁÁ

TEST CONDITIONS

ÁÁÁ

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁ

IPHP

Output current PHP

ÁÁÁÁÁÁ

VPHP = 0.5 VDDA

ÁÁÁ

ÁÁÁÁ

IPHI

Output current PHI

ÁÁÁÁÁÁ

VPHI = 0.5 VDDA

ÁÁÁ

ÁÁÁÁ

IPHA

Output current PHA

ÁÁÁÁÁÁ

VPHA = 0.5 VDDA

ÁÁÁ

ac electrical characteristics, V

= V

CCP

= 2.9 V, V

DDA

= 3.9 V, T

= 25

C (unless otherwise noted)

main divider

PARAMETER

TEST CONDITIONS

ÁÁÁ

MIN

ÁÁÁ

TYP

ÁÁÁ

MAX

ÁÁÁ

UNIT

ÁÁÁÁ

fRFIN

RF input frequency

ÁÁÁ

1.2

ÁÁÁ

GHz

ÁÁÁÁ

VID_RFIN

Differential RF input power

50-

single-ended characteristic impedance; ac-coupled

ÁÁÁ

dBm

Part Number TRF2056