Fairchild Semiconductor KM7101IT5TR3 Datasheet
Features
■
136µA supply current
■
4.9MHz bandwidth
■
Output swings to within 20mV of either rail
■
Input voltage range exceeds the rail by >250mV
■
5.3V/µs slew rate
■
35mA short circuit output current
■
24nV/√Hz input voltage noise
■
Directly replaces LMC7101 in single supply
applications
■
Available in SOT23-5 package
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
General Description
The KM7101 is an ultra-low cost, low power, voltage
feedback amplifier that is pin compatible to the
LMC7101. If a standard pinout is required, use the
KM4170. The KM7101 uses only 136µA of supply
current and offers no crossover distortion. The input
common mode voltage range exceeds the negative
and positive rails.
The KM7101 offers high bipolar performance at a
low CMOS price. The KM7101 offers superior
dynamic performance with a 4.9MHz small signal
bandwidth and 5.3V/µs slew rate. The combination
of low power, high bandwidth, and rail-to-rail performance make the KM7101 well suited for batterypowered communication/computing systems.
KM7101
Ultra-Low Cost, 139µA, +2.7V, 4.9MHz Rail-to-Rail I/O Amplifier
www.fairchildsemi.com
REV. 1B March 2001
KM7101 Package
SOT23-5
Large Signal Frequency Response
Vs = 5V
Vo = 1V
pp
1
Out
+V
2
+In
s
3
-
+
Vo = 4V
pp
Magnitude (1dB/div)
-V
5
s
0.01
Frequency (MHz)
4
-In
Output Swing vs. Load
1.35
RL = 75Ω
0
Output Voltage (0.27V/div)
-1.35
RL = 100Ω
-2.0
Input Voltage (0.4V/div)
0.1
RL = 10kΩ
RL = 1kΩ
RL = 200Ω
Vo = 2V
0
pp
1
RL = 75/100Ω
10
2.0
DATA SHEET KM7101
2 REV. 1B March 2001
Parameters Conditions TYP Min & Max UNITS NOTES
Case Temperature +25°C +25°C
Frequency Domain Response
-3dB bandwidth G = +1, Vo= 0.02V
pp
4.9 MHz 1
G = +2, Vo= 0.2V
pp
3.7 MHz
full power bandwidth G = +2, Vo= 2V
pp
1.4 MHz
gain bandwidth product 2.2 MHz
Time Domain Response
rise and fall time 1V step 163 ns
overshoot 1V step <1 %
slew rate 1V step 5.3 V/µs
Distortion and Noise Response
2nd harmonic distortion 1Vpp, 10kHz -75 dBc
3rd harmonic distortion 1Vpp, 10kHz -76 dBc
THD 1Vpp, 10kHz 0.03 %
input voltage noise >1MHz 24 nV/√Hz
DC Performance
input offset voltage 0.5 ±6 mV 2
average drift 5 µV/°C
input bias current 90 220 nA 2
average drift 32 pA/°C
power supply rejection ratio DC 83 55 dB 2
open loop gain RL= 10kΩ 90 dB
quiescent current 136 190 µA2
Input Characteristics
input resistance 12 MΩ
input capacitance 2 pF
input common mode voltage range -0.25 to 2.95 V
common mode rejection ratio DC, Vcm= 0V to V
s
81 55 dB 2
Output Characteristics
output voltage swing RL= 10kΩ to Vs/2 0.02 to 2.68 0.06 to 2.64 V 2
RL= 1kΩ to Vs/2 0.05 to 2.63 V
RL= 200Ω to Vs/2 0.11 to 2.52 V
output current ±16 mA
short circuit output current ±35 mA
power supply operating range 2.7 2.5 to 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) 100% tested at +25°C.
Absolute Maximum Ratings Package Thermal Resistance
supply voltage 0 to +6V
Package θ
JA
maximum junction temperature +175°C
5 lead SOT23 256°C/W
storage temperature range -65°C to +150°C
lead temperature (10 sec) +300°C
operating temperature range (recommended) -40°C to +85°C
input voltage range +V
s
+ 0.5V, -Vs - 0.5V
internal power dissipation see power derating curves
KM7101 Electrical Characteristics
(Vs= +2.7V, G = 2, RL= 10kΩ to Vs/2, Rf= 5kΩ; unless noted)
KM7101 DATA SHEET
REV. 1B March 2001 3
Parameters Conditions TYP Min & Max UNITS NOTES
Case Temperature +25°C +25°C
Frequency Domain Response
-3dB bandwidth G = +1, Vo= 0.02V
pp
4.3 MHz 1
G = +2, Vo= 0.2V
pp
3.0 MHz
full power bandwidth G = +2, Vo= 2V
pp
2.3 MHz
gain bandwidth product 2.0 MHz
Time Domain Response
rise and fall time 1V step 110 ns
overshoot 1V step <1 %
slew rate 1V step 9 V/µs
Distortion and Noise Response
2nd harmonic distortion 2Vpp, 10kHz -73 dBc
3rd harmonic distortion 2Vpp, 10kHz -75 dBc
THD 2Vpp, 10kHz 0.03 %
input voltage noise >1MHz 27 nV/√Hz
DC Performance
input offset voltage 1.5 ±8 mV 2
average drift 15 µV/°C
input bias current 90 270 nA 2
average drift 40 pA/°C
power supply rejection ratio DC 60 40 dB 2
open loop gain RL= 10kΩ 80 dB
quiescent current 160 235 µA2
Input Characteristics
input resistance 12 MΩ
input capacitance 2 pF
input common mode voltage range -0.25 to 5.25 V
common mode rejection ratio DC, Vcm= 0V to V
s
85 58 dB 2
Output Characteristics
output voltage swing RL= 10kΩ to Vs/2 0.04 to 4.96 0.08 to 4.92 V 2
RL= 1kΩ to Vs/2 0.07 to 4.9 V
RL= 200Ω to Vs/2 0.14 to 4.67 V
output current ±30 mA
short circuit output current ±60 mA
power supply operating range 5.0 2.5 to 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) 100% tested at +25°C.
KM7101 Electrical Characteristics
(Vs= +5V, G = 2, RL= 10kΩ to Vs/2, Rf= 5kΩ; unless noted)
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