NEC UPC2798GR-E1, UPC2798GR Datasheet

DATA SHEET

BIPOLAR ANALOG INTEGRATED CI RCUIT

µµµµ

PC2798GR

IF DOWN CONVERTOR IC FOR DIGITAL CATV

DESCRIPTION

The µPC2798GR is a Silicon monolithic IC designed for use as QAM IF down convertor for digital CATV. This IC

consists of AGC amplifier, mixer, oscillator, and video amplifier.

The package is 20 pins SSOP suitable for high-density surface mount.

FEATURES

• Low distortion AGC amplifier IIP3 = −9 dBm

• On chip IF convertor fin = 30 to 250 MHz

• On chip video amplifier Vout = 3.0 V

• Supply voltage: 5 V

• Packaged in 20 pins SSOP suitable for high-density surface mount.

P-P

(differential, @ RL = 1kΩ)

ORDERING INFORMATION

PART NUMBER PACKAGE PACKAGE STYLE

µ

PC2798GR-E1 20 pins plastic SSOP (225 mil) Embossed tape 12 mm wide. 2. 5 k/REEL.

Pin 1 indicates pull-out di rection of tape

: For evaluation sample order, please contact your local NEC office.

*

(Part number for sample order:

Please refer to “Quality grade on NEC Semiconductor Devices” (Document number C11531E) published by NEC

Corporation to know the specification of quality grade on the devices and its recommended applications.

PC2798GR)

µ

The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version.

Not all devices/types available in every country. Please check with local NEC representative for availability and additional information.

Document No. P11998EJ3V0DS00 (3rd edition) Date Published October 1999 N CP(K) Printed in Japan

Caution electro-static sensitive device

The mark shows major revised points.

©

1996, 1999

INTERNAL BLOCK DIAGRAM AND PIN CONFIGURATION (Top View)

µµµµ

PC2798GR

AGC IN1

AGC IN2

AGC

V

VCC1

OSC OUT

GND

OSC B2

OSC C1

OSC C2

OSC B1

1

2

3

4

5

6

7

8

9

10

AGC Amp

OSC OUT Buffer Amp

OSC

MIXER

OSC Buffer Amp

VIDEO Amp

20

19

18

17

16

15

14

13

12

11

GND

MIX OUT2

MIX OUT1

G1A

G1B

INA

INB

CC

2

V

OUT1

OUT2

2

Data Sheet P11998EJ3V0DS00

PIN EXPLANATIONS

1

4

2

AGC control

Reg

3

4

AGC control

10

948

7

Reg Reg

µµµµ

PC2798GR

Pin No. Symbol

1 AGC IN1 1.5 Input pin of IF signal.

2 AGC IN2 1.5

3V

4 Vcc1 5.0 Power supply pin of IF down convertor block.

5OSC

AGC

OUT

Pin Voltage

(V, TYP.)

0 to 5

4.0

Explanation Equivalent Circuit

1pin is same phase and 2pin is oppos i te phase at balance input. In case of single input, 1pin or 2pin should be grounded through capacitor.

Automatic gain control pi n. This pin’s bias govern the A G C out put level.

AGC

= 0 V

= 5 V

Minimum gain at V Maximum gain at V Recommend to use by deviding AGC voltage with externally resis tor (ex. 100 kΩ).

Must be connected bypass capacitor to minimize ground impedance.

Output pin of Oscillator frequency. Connected to PLL symthesizer IC’s input pin.

4

6 GND 0.0 Ground pin.

7 OSC B2

8OSC C1

9OSC C2

10 OSC B1

2.4

4.6

2.4

Must be connected to the system ground with minimum inductanc e. Ground pattern on the board should be formed as wide as possible.

Internal oscillator consist in balance amplifier. 7 and 8pins, 9 and 10 pins should be externally connected to oscillate wit h active feedback loop. Connected LC resonator between 7pin and 10pin.

Data Sheet P11998EJ3V0DS00

5

Reg

3

PIN EXPLANATIONS

12 11

13

REG

Pin No. Symbol

Pin Voltage (V, TYP.) ( ) is value at Vcc2 = 9 V.

Explanation Equivalent Circuit

µµµµ

PC2798GR

11 OUT2 2.5

(4.7)

Output pin of video amplifi er.

L

In case of R voltage equal 3 V

= 1 kΩ, differential output

P-P

. OUT1 and INA are same phase. OUT2 and INB are same phase.

11 OUT1 2.5

(4.7)

13 Vcc2 5 to 9 Power supply pi n of video amplifier.

Must be connected bypass capacitor to minimize ground impedance.

14 INB

15 INA

2.5

(4.1)

2.5

Signal input pin of video ampl i f i er. This pin is high impedance.

(4.1)

16 G1B 1.7

(3.3)

Gain control pin of video ampli fier. Maximum gain at G1A-GIB = short . Minimum gain at G1A-G1B = open. Gain is able to adjust by i ns erting arbitrary resistor between 16pin and 17pin.

17 G1A

1.7

(3.3)

17

REG

15

13

14 16

18 MIX

19 MIX

20 GND

4

OUT1

3.7 Output pin of mixer. This output pin features low-i m pedance because of its emitter-follower output port.

18

3.7

REG

19

OUT2

0.0

Ground pin. Must be connected to the system ground with minimum inductanc e. Ground pattern on the board should be formed as wide as possible.

Data Sheet P11998EJ3V0DS00

µµµµ

PC2798GR

ABSOLUTE MAXIMUM RATINGS (TA = 25

C unless otherwise specified)

°°°°

PARAMETER SYMBOL RATING UNIT TEST CONDITIONS Supply Voltage 1 Vcc1 6.0 V Mixer block Supply Voltage 2 Vcc2 6.0 V Video Amp block Power Dissipation P Operating Ambient Temperature T Storage Temperature T

A

D

A

stg

430 mW

40 to +85

−

55 to +150

−

T

C

°

C

°

= 85 °C

*1

PARAMETER SYMBOL RATING UNIT TEST CONDITIONS Supply Voltage 1 Vcc1 6.0 V Mixer block Supply Voltage 2 Vcc2 11.0 V Video Amp block Power Dissipation P Operating Ambient Temperature T Storage Temperature T

Mounted on 50 × 50 × 1.6 mm double copper epoxy glass board.

*1.

D

A

stg

500 mW

40 to +75

−

55 to +150

−

A

T

C

°

C

°

= 75 °C

*1

RECOMMENDED OPERATING RANGE

PARAMETER SYMBOL MIN. TYP. MAX. UNIT Supply Voltage 1 Vcc1 4.5 5.0 5.5 V Supply Voltage 2 Vcc2 4.5 5. 0 10.0 V Operating Ambient Temperature 1 Operating Ambient Temperature 2

@Vcc1 = Vcc2 = 4.5 to 5.5 V

*2.

@Vcc1 = 4.5 to 5.5 V, Vcc2 = 4.5 to 10.0 V

*3.

ELECTRICAL CHARACTERISTICS (T

*2

*3

A

= 25

TA1 TA2

40 +25 +85

−

40 +25 +75

−

C)

°°°°

C

°

C

°

PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITIONS Total Block (RL = 1 kΩ, by measurement circ ui t 5) Circuit Current 1 Icc1 24.0 35.5 45.0 mA no i nput signal, Vcc1 = Vc c 2 = 5 V

AGC

V

Maximum Conversion Gain 1 CG Maximum Conversion Gain 2 CG Minimum Conversion Gain 1 CG Minimum Conversion Gain 2 CG

MAX

1 68.0 74.0 76.0 dB

MAX

2



MIN

1 32.0 39.0 43.0 dB

MIN

2



58.0

22.0



dB

= 4.0 V, G1A-G1B pins: s hort

AGC

V

= 4.0 V, G1A-G1B pins: open

AGC

V

= 1.0 V, G1A-G1B pins: s hort

AGC

V

= 1.0 V, G1A-G1B pins: open

Circuit Current 2 Icc1 32.0 47.0 60.0 mA no i nput signal, Vcc1 = 5 V, Vcc2 = 9 V

AGC

V

Maximum Conversion Gain 3 CG Maximum Conversion Gain 4 CG Minimum Conversion Gain 3 CG Minimum Conversion Gain 4 CG

MAX

3 72.0 78.5 81.0 dB

MAX

MIN

4



3



4



59.0

43.5

22.5

  

dB dB dB

= 4.0 V, G1A-G1B pins: s hort

AGC

V

= 4.0 V, G1A-G1B pins: open

AGC

V

= 1.0 V, G1A-G1B pins: s hort

AGC

V

= 1.0 V, G1A-G1B pins: open

*4

Data Sheet P11998EJ3V0DS00

5

µµµµ

PC2798GR

ELECTRICAL CHARACTERISTICS (TA = 25

C)

°°°°

PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITIONS

AGC Amplifier + Mixer Block (@Vcc1 = 5 V, RL = 50 Ω, by measurement circ ui t 1) Circuit Current 3 Icc3 15.0 23.0 28.0 mA no i nput signal RF Input Frequency Range f OSC Frequency Range f IF Output Frequency Range f Minimum Conversion Gain 5 CG Minimum Conversion Gain 5 CG AGC Dynamic Range GCR 26 32 Noise Figure NF AGC Voltage High Level V AGC Voltage Low Level V

RF

OSC

IF

MAX

MIN

30 30

DC

5



5

−



AGC

H4.0

AGC

L



  

25

7

250 Mhz 250 Mhz 150 Mhz

  

9





1.0 V @Minimum Gain

dB dB dB V dB

AGC

V

AGC

V

AGC

SSB, V

*4

= 4.0 V

*4

= 1.0 V

= 1.0 to 4.0 V

AGC

= 4.0 V (@Maximum Gain)

V @Maximum Gain

Video Amp. Block (@Vc c2 = 5 V, RL = 1 kΩ, Input: 51 Ω terminated, by measurement circuit 3) Circuit Current 4 Icc4 9.0 12.5 17.0 mA no input si gnal Differential Gain 1 G1



200



V/V G1A-G1B pins: short, Vout = 3.0 V

fin = 10 MHz

Differential Gain 2 G2



26.0



V/V G1A-G1B pins: open, Vout = 3.0 V

fin = 10 MHz Video Amp. Block (@Vc c2 = 9 V, RL = 1 kΩ, Input: 51 Ω terminated, by measurement circuit 3) Circuit Current 5 Icc5 17.0 24.0 32.0 mA no i nput signal Differential Gain 3 G3



385



V/V G1A-G1B pins: short, Vout = 3.0 V

fin = 10 MHz Differential Gain 4 G4



28.5



V/V G1A-G1B pins: open, Vout = 3.0 V

fin = 10 MHz Video Amp. Block (@V cc2 = 5 V or 9 V: Common, RL = 1 kΩ, Input: 51 Ω terminated, by measurement circuit 3) Output Voltage V

OUT

Bandwidth 1 BW Bandwidth 2 BW Input Resistance 1 Rin1 Input Resistance 2 Rin2 Input Capacitance Cin



G1

G2

    

3.0 50 50

3.5

9.7

1.6

     

P-P

V

RL = 1 kΩ, differential MHz G1 (G1A-G1B pi ns: short) MHz G2 (G1A-G1B pi ns: open)

k

G1 (G1A-G1B pins: short)

Ω

k

G2 (G1A-G1B pins: open)

Ω

pF

P-P

*4, 5

,

RF

= 45 MHz, f

.f

*4

. By measurement circuit 2

*5

6

OSC

= 55 MHz, P

OSC

= −10 dBm

Data Sheet P11998EJ3V0DS00

µµµµ

PC2798GR

STANDARD CHARACTERISTICS (TA = 25

PARAMETER SYMBOL

C)

°°°°

VALUE FOR

REFERENCE

UNIT TEST CONDITIONS

AGC Amplifier + Mixer B l ock (@Vcc1 = 5 V, by measurement circuit 1)

AGC

= 1.0 V @Minimum Gain

AGC Input Intercept Poi nt 1 AGC

IIP

9dBm

−

3

1

V

Video Amp. Block (RL = 50 Ω, input: 51 Ω terminated, by measurement circuit 4) Single-end Gain 1 AVS1 40.0 dB VCC2 = 5 V, G1A-G1B pins: short Single-end Gain 2 AVS2 22.5 dB VCC2 = 5 V, G1A-G1B pins: open Single-end Gain 3 AVS3 45.0 dB VCC2 = 9 V, G1A-G1B pins: short Single-end Gain 4 AVS4 23.5 dB VCC2 = 9 V, G1A-G1B pins: open Input Intercept Point 2 IIP32

11.5 dBm VCC2 = 5 V, G1A-G1B pins: open

−

fin1 = 9 MHz, fin2 = 11 MHz

Input Intercept Point 3 IIP33

5.0 dB m VCC2 = 9 V, G1A-G1B pins: open

−

fin1 = 9 MHz, fin2 = 11 MHz Video Amp. Block (@V cc2 = 5 V or 9 V: Common, by m eas urement circuit 3) Common Mode Rejection

CMRR 80 dB VCM = 1 V

P-P

, f = 100 kHz

Ratio Power Supply Rejection

PSRR 70 dB

Ratio Rise Time Propagation Delay Time

R

τ

PD

τ

2.6 ns

4.4 ns Total Block (RL = 1 kΩ, by measurement circ ui t 5) Input Intercept Point 4 IIP34

14.0 dBm VCC1 = VCC2 = 5 V, V

−

AGC

= 1 V,

G1A-G1B pins: short

Input Intercept Point 5 IIP35

8.0 dB m VCC1 = VCC2 = 5 V, V

−

AGC

= 1 V,

G1A-G1B pins: open

Input Intercept Point 6 IIP36

7.5 dB m VCC1 = 5 V, VCC2 = 9 V, V

−

AGC

G1A-G1B pins: open

*6

= 1 V,

*6

RF

1 = 44 MHz, fRF2 = 46 MHz, f

f

*6

OSC

= 55 MHz, P

Data Sheet P11998EJ3V0DS00

OSC

= −10 dBm

7

TYPICAL CHARACTERISTICS (by measurement circuit 5, TA = 25 °C, f

OSC

= fRF + 10 MHz, P

OSC

=

−−−−

10 dBm)

µµµµ

PC2798GR

CONVERSION GAIN vs. INPUT FREQUENCY

80

V

AGC

= 4 V

60

V

AGC

= 3 V

40

V

AGC

= 1 V

20

CG - Conversion Gain - dB

V

CC

1 = 5 V

CC

2 = 5 V

V 1 kΩ Load G1A–G1B: short

0

0 50 100 150 200 250

fRF - Input Freqency - MHz

CONVERSION GAIN vs. INPUT FREQUENCY

80

V

AGC

= 4 V

AGC

= 3 V

V

60

AGC

= 1 V

V

40

20

CG - Conversion Gain - dB

V

CC

1 = 5 V

CC

2 = 9 V

V 1 kΩ Load G1A–G1B: short

0

0 50 100 150 200 250

fRF - Input Frequency - MHz

CONVERSION GAIN vs. INPUT FREQUENCY CONVERSION GAIN vs. INPUT FREQUENCY

80

V

AGC

60

40

20

CG - Conversion Gain - dB

= 4 V

AGC

= 3 V

V

AGC

= 1 V

V

VCC1 = 5 V, VCC2 = 5 V G1A–G1B: open 1 kΩ load

0

0 50 100 150 200 250

fRF - Input Frequency - MHz

V

AGC

60

40

20

CG - Conversion Gain - dB

= 4 V

AGC

= 3 V

V

AGC

= 1 V

V

VCC1 = 5 V, VCC2 = 9 V G1A–G1B: open 1 kΩ load

0

0 50 100 150 200 250

fRF - Input Frequency - MHz

8

Data Sheet P11998EJ3V0DS00