Fairchild Semiconductor FAN4272 Datasheet

Features at 2.7V

• 130µA supply current per amplifier

• 4MHz bandwidth

• Output swings to within 25mV of either rail

• Input voltage range exceeds the rail by >250mV

• 4V/µs slew rate

• 16mA output current

• 22nV/√Hz input voltage noise

• Operating temperature range: -40°C to +125°C

• Directly replaces TLC2272 in single supply applications

•Available in SOIC-8 and MSOP-8 package options

•Available evaluation boards: KEB006 (SOIC) and KEB010 (MSOP)

Applications

• Automotive applications

• Portable/battery-powered applications

• PCMCIA, USB

• Mobile communications, cellular phones, pagers

•Notebooks and PDA’s

• Sensor Interface

• A/D buffer

• Active filters

• Signal conditioning

• Portable test instruments

Description

The FAN4272 is an ultra-low cost, low power, voltage feedback amplifier. At 5V, the FAN4272 uses only 160µA of supply current per amplifier and is designed to operate from a supply range of 2.5V to 5.5V (±1.25V to 2.75V). The input voltage range exceeds the negative and positive rails.

The FAN4272 offers high bipolar performance at a low CMOS price. The FAN4272 offers superior dynamic performance with a 4MHz small signal bandwidth and 4V/µs slew rate. The combination of low power, high bandwidth, and rail-torail performance make the FAN4272 well suited for batterypowered communication/computing systems.

FAN4272

Dual, Low Cost, +2.7V & +5V, Rail-to-Rail I/O Amplifier

www.fairchildsemi.com

Rev. 2 December 2002

FAN4272 Packages

MSOP

SOIC

Large Signal Freq. Response Vs = +5V

Vo = 1V

pp

Vo = 4V

pp

Vo = 2V

pp

Magnitude (1dB/div)

1100.1

Frequency (MHz)

+V

Out1

-In1

+In1

-V

Out1

-In1

+In1

-V

1

2

-

+

3

4

s

1

2

-

+

3

4

s

8

Out2

7

-In2

6

-

+

5

+In2

+V

8

Out2

7

-In2

6

-

+

5

+In2

Output Swing vs. Load Vs = +5V

2.5

2.0

s

1.5

1.0

0.5 0

-0.5

-1.0

-1.5

Output Voltage (0.25V/div)

-2.0

-2.5

-3 -2 -1 0 1 2

RL = 10kΩ

RL = 1kΩ

RL = 75Ω

Input Voltage (V)

RL = 100Ω

RL = 200Ω

3

DATA SHEET FAN4272

2 Rev. 2 December 2002

Absolute Maximum Ratings

Parameter Min. Max. Unit

Supply Voltages 0+6V Maximum Junction Temperature – +175 °C Storage Temperature Range -65 +150 °C Lead Temperature, 10 seconds – +260 °C Operating Temperature Range, recommended -40 +125 °C Input Voltage Range -

Vs-0.5 +Vs+0.5

V

Electrical Specifications

(Vs= +2.7V, G = 2, RL= 10kΩ to Vs/2, Rf= 5kΩ, Ta= 25°C; unless otherwise noted)

Parameter Conditions Min. Typ. Max. Unit AC Performance

-3dB Bandwidth

1

G = +1, Vo= 0.02V

pp

4 MHz

G = +2, Vo= 0.2V

pp

3.7 MHz

Large Signal Bandwidth G = +2, Vo= 2V

pp

1.1 MHz Gain Bandwidth Product 1.7 MHz Rise and Fall Time 1V step 215 ns Overshoot 1V step <1 % Slew Rate 1V step 4 V/µs 2nd Harmonic Distortion 1Vpp, 10kHz -74 dBc 3rd Harmonic Distortion 1Vpp, 10kHz -62 dBc THD 1Vpp, 10kHz 0.08 % Input Voltage Noise >10kHz 22 nV/√Hz Crosstalk >100kHz 95 dB

DC Performance

Input Offset Voltage <0.5 mV Average Drift 4 µV/°C Input Bias Current 90 nA Average Drift 100 pA/°C Power Supply Rejection Ratio

2

DC 70 85 dB

Open Loop Gain RL= 10kΩ 75 dB Quiescent Current Per Channel 130 µA

Input Characteristics

Input Resistance 12 MΩ Input Capacitance 1.8 pF Input Common Mode Voltage Range -0.25 to 2.95 V Common Mode Rejection Ratio DC, Vcm= 0V to V

s

78 dB

Output Characteristics

Output Voltage Swing RL= 10kΩ to Vs/2

2

0.06 to 2.64 0.025 to 2.68 V RL= 1kΩ to Vs/2 0.07 to 2.645 V RL= 200Ω to Vs/2 0.198 to 2.59 V

Output Current ±16 mA Power Supply Operating Range 2.5 2.7 5.5 V

Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined from tested parameters.

Notes:

1. For G = +1, Rf= 0.

2. Guaranteed by testing or statistical analysis at 25°C.

FAN4272 DATA SHEET

Rev. 2 December 2002 3

Electrical Specifications

(Vs= +5V, G = 2, RL= 10kΩ to Vs/2, Rf= 5kΩ, Ta= 25°C; unless otherwise noted)

Parameter Conditions Min. Typ. Max. Unit AC Performance

-3dB Bandwidth

1

G = +1, Vo= 0.02V

pp

4 MHz

G = +2, Vo= 0.2V

pp

4.7 MHz

Large Signal Bandwidth G = +2, Vo= 2V

pp

1.7 MHz Gain Bandwidth Product 1.8 MHz Rise and Fall Time 1V step 150 ns Overshoot 1V step <1 % Slew Rate 1V step 6 V/µs 2nd Harmonic Distortion 2Vpp, 10kHz -73 dBc 3rd Harmonic Distortion 2Vpp, 10kHz -75 dBc THD 2Vpp, 10kHz 0.03 % Input Voltage Noise >10kHz 23 nV/√Hz Crosstalk >100kHz 95 dB

DC Performance

Input Offset Voltage

2

-2 <0.5 +2 mV

Average Drift 8 µV/°C Input Bias Current

2

-420 90 420 nA Average Drift 100 pA/° Input Offset Current

2

-50 +50 nA

Power Supply Rejection Ratio

2

DC 70 85 dB Open Loop Gain RL= 10kΩ 72 dB Quiescent Current Per Channel

2

160 235 µA

Input Characteristics

Input Resistance 12 MΩ Input Capacitance 1.7 pF Input Common Mode Voltage Range -0.25 to 5.25 V Common Mode Rejection Ratio

2

DC, Vcm= 0V to V

s

58 85 dB

Output Characteristics

Output Voltage Swing RL= 10kΩ to Vs/2

2

0.09 to 4.91 0.031 to 4.976 V RL= 1kΩ to Vs/2 0.094 to 4.94 V RL= 200Ω to Vs/2 0.315 to 4.865 V

Output Current ±30 mA Power Supply Operating Range 2.5 2.7 5.5 V

Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined from tested parameters.

Notes:

1. For G = +1, Rf= 0.

2. Guaranteed by testing or statistical analysis at 25°C.

3. RL= 10kΩ to Vs/2.

Package Thermal Resistance

Package θ

JA

8 lead SOIC 152°C/W 8 lead MSOP 206°C/W

Typical Operating Characteristics

(Vs= +5V, G = 2, RL= 10kΩ to Vs/2, Rf= 5kΩ, Ta= 25°C; unless otherwise noted)

4 Rev. 2 December 2002

DATA SHEET FAN4272

Non-Inverting Freq. Response Vs = +5V

Vo = 0.2V

pp

G = 10

Rf = 5kΩ

R

G = 5

= 5kΩ

f

G = 1

Rf = 0

G = 2

Rf = 5kΩ

Normalized Magnitude (1dB/div)

0.01

0.1

1

Frequency (MHz)

Non-Inverting Freq. Response Vs = +2.7V

Vo = 0.2V

pp

G = 10

Rf = 5kΩ

G = 5

Rf = 5kΩ

G = 1

Rf = 0

G = 2

Rf = 5kΩ

Normalized Magnitude (1dB/div)

0.01

0.1

1

Frequency (MHz)

Inverting Freq. Response Vs = +5V

Vo = 0.2V

pp

G = -10

Rf = 5kΩ

R

f

Rf = 5kΩ

G = -5

= 5kΩ

G = -2

G = -1

Rf = 5kΩ

Normalized Magnitude (1dB/div)

10

0.01

0.1

1

10

Frequency (MHz)

Inverting Freq. Response Vs = +2.7V

Vo = 0.2V

pp

G = -10

Rf = 5kΩ

G = -5

Rf = 5kΩ

G = -2

G = -1

Rf = 5kΩ

Normalized Magnitude (1dB/div)

10

0.01

0.1

1

10

Frequency (MHz)

Frequency Response vs. CL Vs = +5V

CL = 50pf

R

s

C

L

0.1

CL = 200pf CL = 100pf

CL = 20pf

CL = 10pf

R

L

1

Rs = 0

+

-

Magnitude (1dB/div)

5kΩ

0.01

Frequency (MHz)

Large Signal Freq. Response Vs = +5V

Vo = 1V

Vo = 4V

pp

Vo = 2V

pp

Magnitude (1dB/div)

1100.1

Frequency (MHz)

Frequency Response vs. RL Vs = +5V

RL = 10kΩ

RL = 2kΩ

RL = 1kΩ

RL = 100kΩ

Magnitude (3dB/div)

10

0.01 0.1 1

10

Frequency (MHz)

Open Loop Gain & Phase vs. Frequency

140

pp

120

100

80

60

40

20

Open Loop Gain (dB)

0

-20

|Gain| R

= 10kΩ

L

|Gain| No Load

Phase No Load

Phase

= 10kΩ

R

L

1

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

Open Loop Phase (deg)

0

-45

-90

-135

-180

Frequency (Hz)