Datasheet CXA3221N Datasheet (Sony)

RX Gain Control Amplifier

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Description

CXA3221N is an RX gain control amplifier suitable

for CDMA cellular/PCS phone.

Features

• Wide gain control range

• Linear gain slope

• Wideband operation (50MHz to 300MHz)

• Very small package (8 Pin SSOP)

• Low voltage operation

• Power save function included

Absolute Maximum Ratings

• Supply voltage VCC 6V

•Operating temperature Topr –55 to +125 °C

• Storage temperature Tstg –65 to +150 °C

• Supply voltage range –0.3 to 6 V

• Logic input voltage –0.3 to VCC + 0.3V

• Signal input voltage –0.3 to VCC + 0.3V

•

Differental signal input voltage

0 to 2.5 V

CXA3221N

8 pin SSOP (Plastic)

Operating Condition

Supply voltage VCC 2.7 to 3.8 V

Applications

CDMA cellular/PCS phone

Structure

Bipolar silicon monolithic IC

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

– 1 –

E97809-PS

Block Diagram

CXA3221N

IF Input for CDMA

Gain control

Supply Voltage

Ground

Power Save

CDMA IN

CDMA INX

GCTL

VCC

GND

PSV

Bias Driver

OUT

OUTX

IF Output

Pin Configuration

GND

CDMA IN

CDMA INX

PSV

8

1

2

3

4

GCTL

V

CC

7

OUTX

6

OUT

5

– 2 –

Pin Description

CXA3221N

Pin No.

1

Symbol

GND

2 CDMA IN

CDMA INX

3

4 PSV

Pin voltage

TYP (V)

0

1.15

—

Equivalent circuit Description

Ground.

2k2k

Differential input pins for received CDMA IF signal.

GND

2

3

VCC1

Power save function pin.

4

135k

High: Active Low: Power save

5 OUT

OUTX

6

7

VCC

8 GCTL

—

3.0

—

5

12.3k 12.3k

8

GND

6

460460

VCC

Differential output pins for received CDMA IF signal. Open collector output.

GND

Positive power supply.

CC1

8k8k

V

Gain control pin.

– 3 –

6k6k

GND

Electrical Characteristics

CXA3221N

DC Characteristics

Parameter Symbol Conditions Min. Unit Current consumption 1 Current consumption 2 Input current pin 8H Input current pin 8L Input current pin 16H Input current pin 16L PSV high voltage PSV low voltage

AC Characteristics

Parameter Symbol Conditions Min. Operating frequency

range

ICC1 ICC2 IpsvH IpsvL IgctlH IgctlL VpsH VpsL

Fr

Vpsv = 3.0V, Vgctl = 1.5V, Pin 7 Vpsv = 0 V, Vgctl = 1.5V, Pin 7 Vpsv = 3.0V Vpsv = 0 V Vgctl = 3.0V Vgctl = 0.5V Pin 4 Pin 4

(VCC = 3.0V, Ta = 27°C)

Typ.

Max.

10.2

7

18

5

15 40

mA

1

–15

µA

1

–1

2.5 V

0.5

(VCC = 3.0V, Ta = 27°C)

50

Typ.

Max.

300

Unit

MHz

Gain 2.4 Gain 1.5 Gain 0.6 Gain slope

Input level 3rd order intercept point

Noise Figure

∗1

Adjust GCTL voltage, and set the overall gain to 40dB.

G2.4 G1.5 G0.6 GCLIN

IIP3

NF

f = 210.38MHz, Vgctl = 2.4V Vgctl = 1.5V Vgctl = 0.6V Gain at Vgctl = 2.0V – Gain at Vgctl = 1.0V G = 40dB

f1 = 209.38MHz, f2 = 211.38MHz Measure of 210.38MHz

G = 40dB Measure of 210.38MHz

∗1

42 –7

–59

58

–42

46 –3

–55

61

–38

5

50

1

–51

64

8

dB

dB/V

dBm

dB

– 4 –

Measurement Circuit

CXA3221N

CDMA INPUT

Application Circuit

GND

1

GCTL

8

1k

V8

A8

0.01µ

180n

∗1

1000p

2

∗

A4

CDMA IN

2

CDMA INX

3

PSV

4

V

CC

OUTX

OUT

7

3

∗

150n

6

A7

0.01µ

∗1

1.6k

5

∗

1

TOKO, Inc. B5FL 616DS-1135

∗

2

Coilcraft, Inc. 0805HS-181TKBC

∗

3

Coilcraft, Inc. 0805HS-151TKBC

OUTPUT

VCC

CDMA RX IF INPUT

∗

1000p

∗

1000p

Active

Sleep

GND

1

CDMA IN

2

CDMA INX

3

PSV

4

GCTL

CC

V

OUTX

OUT

0.01µ

1k

8

100p

7

0.01µ

6

∗

5

Gain Control Voltage

1000p

RX IF OUTPUT

1000p

∗

Must be adjusting values to result a best impedance matching between BPF filter and this IC.

Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.

– 5 –

CXA3221N

Design Reference Values

Single ended measurement (VCC = 3.0V, Ta = 27°C)

Item Input resistance Input capacitance

Symbol Rin Cin

Conditions

Typ.

2.7

1.3

Unit

kΩ pF

f = 210.38MHz, Vgctl = 1.5V

Output resistance Output capacitance

Rout Cout

5.9

0.73

kΩ pF

Notes on Operation

1) This IC is a wideband amplifier with wide gain control range. The decouping capacitors between GND Pin and VCC Pin should be as close to the IC as possible.

2) The resistors connected to Pins 5 and 6 should be as close to the IC as possible.

3) This IC assumes the excellent characteristics when the differential input impedance between Pins 2 and 3 is 500Ω. Refer to the Measurement Circuit for the external element settings, etc.

4) Pay attention to handling this IC because its electrostatic discharge strength is weak.

– 6 –

CXA3221N

60

VCC = 3.0V

40

20

0

–20

Power gain [dB]

–40

–60

–80

0

25

20

Sensitivity

T = –40°C T = 27°C T = 85°C

0.5 1 1.5 2 2.5 3 Vgctl [V]

Noise Figure

VCC = 3.0V

0

–10

–20

–30

IIP3 [dBm]

–40

–50

–60

–80

6

4

IIP3

VCC = 3.0V

T = –40°C T = 27°C T = 85°C

–40

–60 –20 0 20 40 60

Power gain [dB]

Gain Error from Room Temp

VCC = 3.0V

15

10

Noise figure [dB]

5

0

–10

0 2030405060

T = –40°C T = 27°C T = 85°C

10

Power gain [dB]

2

0

Gain error [dB]

–2

–4

–6

–80

–60 –40 –20

Power gain [dB]

T = –40°C T = 85°C

0204060

– 7 –

Package Outline Unit: mm

∗3.0 ± 0.1

8PIN SSOP (PLASTIC)

+ 0.2

1.25 – 0.1

CXA3221N

+ 0.08

0.24 – 0.07

B

0.24 – 0.07

1

+ 0.08

(0.22)

58

0.1

A

∗4.4 ± 0.1

6.4 ± 0.2

4

0.65

0.25

0.13

M

0.1 ± 0.05

0.6 ± 0.15

(0.5)

0° to 10°

+ 0.025

(0.15)

DETAIL

0.17 – 0.015

A

DETAIL B

NOTE: Dimension “∗” does not include mold protrusion.

SONY CODE EIAJ CODE

JEDEC CODE

SSOP-8P-L01

SSOP008-P-0044

PACKAGE STRUCTURE

PACKAGE MATERIAL

LEAD TREATMENT

LEAD MATERIAL PACKAGE MASS

EPOXY RESIN

SOLDER / PALLADIUM

COPPER ALLOY

0.04g

PLATING

– 8 –