MAX4473ESA(1999) Просмотр технического описания (PDF) - Maxim Integrated

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MAX4473ESA
(Rev.:1999)

Low-Cost, Low-Voltage, PA Power Control Amplifier for GSM Applications

Maxim Integrated 

Low-Cost, Low-Voltage, PA Power Control

Amplifier for GSM Applications in 8-Pin µMAX

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +2.7V to +6.5V, SHDN > +2.4V, MAX4473 test circuit, RG1 = RG2 = 1kΩ ±1%, RG3 = 2.5kΩ ±1%, RSENSE = 100Ω ±1%, RL

= 10kΩ, CL = 300pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +6.0V, VPC = +1.0V, TA = +25°C.)

(Note 1)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Capacitive Load Stability

No sustained oscillations (Note 3)

Enable/Disable Time

From 50% of SHDN edge to VOUT = 1V, VPC = 2V

GAIN CONTROL BUFFER AND V-TO-I CONVERTER

0

300

pF

0.9

1.5

µs

PC Input Bias Current

SR3 Output Current Limit

VPC to VRG1 Ratio

PC Input Bandwidth

GND < VPC < VCC - 0.15V

VPC = 2.55V, SR1 = SR2 = VCC

Measure voltage across RG1, 0.3V < VPC < 2.55V (Note 4)

Bandwidth from VPC to VRG1

0.750

0.095

±0.04

4

0.1

2

±1

0.105

µA

mA

V/V

MHz

Note 1: Limits over temperature are guaranteed by design.

Note 2: No output phase-reversal for input common-mode voltage range from GND to VCC. Common-mode range limited by voltage

drop across Q1 and RG3.

Note 3: Guaranteed by design.

Note 4: Error dependent on tolerance of RG1, RG2, and RG3. Specified with 0.1% tolerance resistors.

(See Test Circuit, TA = +25°C, unless otherwise noted.)

Typical Operating Characteristics

SUPPLY CURRENT vs. SUPPLY VOLTAGE

1.4

TA = -40°C

1.2

TA = +25°C

1.0

TA = +85°C

0.8

0.6

SHDN = VCC

PC = GND

0.4

2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5

SUPPLY VOLTAGE (V)

ENABLE/DISABLE TIME

SHDN

2V/div

GND

VCC = 6.5V

VPC = 2V

OUT

500mV/div

GND

500ns/div

VRG1 / VPC RATIO vs. VPC RESPONSE

0.1100

VCC = 6.0V

0.1075

0.1050

0.1025

0.1000

0.0975

0.0950

0.0925

0.0900

0

1

2

3

4

5

6

VPC (V)

ERROR-AMPLIFIER

OUTPUT LOW VOLTAGE vs. TEMPERATURE

0.30 VCC = 6.5V, RL = 500Ω to VCC / 2

0.25

0.20

0.15 VCC = 2.7V, RL = 500Ω to VCC / 2

0.10

0.05

0

-40

VCC = 2.7V, RL = 10kΩ to VCC / 2

VCC = 6.5V, RL = 10kΩ to VCC / 2

-15

10

35

60

85

TEMPERATURE (°C)

ERROR-AMPLIFIER RESPONSE

70

60

50

40

30

PHASE

0 MAX4473 toc03

AVCL = 1000

VCC = 6.5V -18

VCM = VCC / 2

VPC = 0

-36

-54

GAIN

-72

20

-90

10

ERROR

-108

AMPLIFIER

0

-126

-10

100k

10k

300pF

-144

-20

100Ω

-162

-30

-180

10 100 1k 10k 100k 1M 10M

FREQUENCY

ERROR-AMPLIFIER

OUTPUT HIGH VOLTAGE vs. TEMPERATURE

0.45

0.40 VCC = 6.5V, RL = 500Ω to VCC / 2

0.35

0.30

0.25

VCC = 2.7V, RL = 500Ω to VCC / 2

0.20

0.15

0.10

VCC = 6.5V, RL = 10kΩ to VCC / 2

0.05

0

-40

VCC = 2.7V, RL = 10kΩ to VCC / 2

-15

10

35

60

85

TEMPERATURE (°C)

_______________________________________________________________________________________ 3

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