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www.fairchildsemi.com
KM4112
Features
I I I I I I I I I I I
70µA, Low Cost, +2.7V & +5V, 7.3MHz Rail-to-Rail Amplifier
General Description
The KM4112 is an ultra-low power, low cost, voltage feedback amplifier. The KM4112 uses only 70µA of supply current and is designed to operate on +2.7V, +5V, or ±2.5V supplies. The input voltage range extends 300mV below the negative rail and 1.2V below the positive rail. The KM4112 offers high bipolar performance at a low CMOS price. The KM4112 offers superior dynamic performance with a 7.3MHz small signal bandwidth and 9V/µs slew rate. The combination of low power, high bandwidth, and rail-to-rail performance make the KM4112 well suited for battery-powered communication/computing systems. 70µA supply current 7.3MHz bandwidth Fully specified at +2.7V and +5V supplies Output voltage range: 0.04V to 4.96V; Vs = +5 Input voltage range: -0.3V to +3.8V; Vs = +5 9V/µs slew rate ±4mA linear output current ±9mA short circuit output current 29nV/√Hz input voltage noise Competes with low power CMOS amps Small package option (SOT23-5)
Applications
I I I I I
Normalized Magnitude (2dB/div)
Portable/battery-powered applications A/D buffer Active filters Signal conditioning Portable test instruments
Non-Inverting Freq. Response Vs = +5V
G=2 Rf = 10kΩ
KM4112 Package
SOT23-5
Out -Vs +In 1 2
+
5
+Vs
-
0.01
0.1
1
10
3
4
-In
Frequency (MHz)
REV. 2 July 2001
DATA SHEET
KM4112
KM4112 Electrical Characteristics
PARAMETERS Case Temperature Frequency Domain Response -3dB bandwidth full power bandwidth gain bandwidth product Time Domain Response rise and fall time settling time to 0.1% overshoot slew rate Distortion and Noise Response 2nd harmonic distortion 3rd harmonic distortion THD input voltage noise DC Performance input offset voltage average drift input bias current average drift input offset current power supply rejection ratio open loop gain quiescent current Input Characteristics input resistance input capacitance input common mode voltage range common mode rejection ratio Output Characteristics output voltage swing linear output current short circuit output current power supply operating range
(Vs = +2.7V, G = 2, RL = 10kΩ to Vs/2, Rf = 10kΩ; unless noted) TYP +25°C MIN & MAX +25°C MHz MHz MHz MHz ns ns % V/µs dBc dBc dB nV/√Hz ±5 250 100 58 65 95 mV µV/°C nA pA/°C nA dB dB µA MΩ pF V dB V V mA mA V 2 2 2 2 2 2 1 UNITS NOTES
CONDITIONS
G = +1, Vo = 0.05Vpp G = +2, Vo < 0.2Vpp G = -1, Vo = 2Vpp 0.2V step 1V step 1V step, 2V step, G = -1 1Vpp, 100kHz 1Vpp, 100kHz 1Vpp, 100kHz >10kHz
6.5 3 2 3.5 55 700 7 7 68 65 63 30 1 3 90 100 2.1 63 82 62 >10 1.6 -0.3 to 1.5 95
DC
DC, Vcm = 0V to Vs - 1.5 RL = 10kΩ to Vs/2 RL = 2kΩ to Vs/2
68
2 2
0.035 to 2.665 0.15 to 2.55 0.07 to 2.6 ±4 ±9 2.7 2.5 to 5.5
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
supply voltage 0 to +6V maximum junction temperature +175°C storage temperature range -65°C to +150°C lead temperature (10 sec) +260°C operating temperature range (recommended) -40°C to +85°C input voltage range +Vs +0.5V; -Vs -0.5V internal power dissipation see power derating curves
Package Thermal Resistance
Package
5 lead SOT23
θJA
256°C/W
2
REV. 2 July 2001
KM4112
DATA SHEET
KM4112 Electrical Characteristics
PARAMETERS Case Temperature Frequency Domain Response -3dB bandwidth full power bandwidth gain bandwidth product Time Domain Response rise and fall time settling time to 0.1% overshoot slew rate Distortion and Noise Response 2nd harmonic distortion 3rd harmonic distortion THD input voltage noise DC Performance input offset voltage average drift input bias current average drift input offset current power supply rejection ratio open loop gain quiescent current Input Characteristics input resistance input capacitance input common mode voltage range common mode rejection ratio Output Characteristics output voltage swing linear output current short circuit output current power supply operating range
(Vs = +5V, G = 2, RL = 10kΩ to Vs/2, Rf = 10kΩ; unless noted) TYP +25°C MIN & MAX +25°C MHz MHz MHz MHz ns ns % V/µs dBc dBc dB nV/√Hz ±5 250 100 58 65 100 mV µV/°C nA pA/°C nA dB dB µA MΩ pF V dB V V mA mA V 2 2 2 2 2 2 1 UNITS NOTES
CONDITIONS
G = +1, Vo = 0.05Vpp G = +2, Vo < 0.2Vpp G = -1, Vo = 2Vpp 0.2V step 2V step 2V step, 2V step, G = -1 2Vpp, 100kHz 2Vpp, 100kHz 2Vpp, 100kHz >10kHz
7.3 3.4 2.5 4 50 600 4 9 67 56 55 29 1 8 90 100 1.3 63 76 70 >10 1.6 -0.3 to 3.8 97 0.04 to 4.96 0.09 to 4.9 ±4 ±9 5
DC
DC, Vcm = 0V to Vs - 1.5 RL = 10kΩ to Vs/2 RL = 2kΩ to Vs/2
68 0.15 to 4.85
2 2
2.5 to 5.5
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.