February 2001
KM4270
Product Brief
Dual, Low Cost, +2.7V and +5V, Rail-to-Rail I/O Amplifier
Preliminary
Outperforms the competition in single-supply applications at a
SOIC-8 (not actual size) MSOP-8 (not actual size)
lower cost!
Advertised 5V Specifications G = 1 BW Noise Slew rate Supply current KM4270 4.3 27 9 160 A 5 22 2 850 Competitors B C 5.5 5.6 25 24 6.0 2 750 250
Features at 2.7V
I I I I I I I I I
160µA supply current per amplifier 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 MAX4126, OPA2340, LMV822, and TLV2462 in single supply applications Available in SOIC and MSOP package options
Available Packages
SOIC
Out1 1 2 3 4 8 7
+
Applications
I I I I I I I I I
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 KM4270 is a dual ultra-low cost, low power, voltage feedback amplifier. At 5V, the KM4270 uses only 160µA of supply current per amplifier and is designed to operate from a supply range of 2.5V to 5.5V. The input voltage range exceeds the negative and positive rails. The KM4170 (single) and KM4470 (quad) are also available. The KM4270 offers high bipolar performance at a low CMOS price. The KM4270 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 KM4270 well suited for battery-powered communication/computing systems.
© 2001 Fairchild Semiconductor Corporation Patents Pending
P
e r
m i l
-In1 +In1 -Vs
i
+
a n
+Vs Out1 Out2 -In2 +In2 -In1 +In1 -Vs 6 5
y r
D 6.4 11 1.6 550
Units
MHz nV/√Hz V/µs µA
MSOP
8
+
1 2 3 4
+Vs Out2 -In2 +In2
7
+
6 5
Ordering Information
Part No. Package KM4270IC8 SOIC-8 KM4270IC8TR3 SOIC-8 KM4270IM8 MSOP-8 KM4270IM8TR3 MSOP-8 Container Rail Reel Rail Reel Pack Qty 95 2500 50 4000 Eval Bd* KEB006 KEB006 KEB010 KEB010
Temperature range for all parts: -40°C to +85°C. * Evaluation boards are available to aid in the evaluation of these products. See the full data sheet or website for complete information.
www.fairchildsemi.com
KM4270
Typical Specifications
Electrical Characteristics
PARAMETERS Frequency Domain Response2 -3dB bandwidth full power bandwidth gain bandwidth product Time Domain Response rise and fall time overshoot slew rate CONDITIONS
(G = +2, Rf = 5kΩ, RL = 10kΩ to Vs/2, Ta = +25°C, unless noted) TYP
Vs = +2.7V
Typical Circuit Configuration
TYP
Vs = +5V
UNITS
+Vs
MHz MHz MHz MHz ns % V/µs dBc dBc % nV/Hz nV/Hz dB mV µV/°C nA pA/°C dB dB µA MΩ pF V dBc V V V mA mA V
G = +1, Vo = 0.02Vpp G = +2, Vo = 0.2Vpp G = +2, Vo = 2Vpp
4.9 3.7 1.4 2.2 163 2KHz 10KHz
Rg
Input Characteristics input resistance input capacitance input common mode voltage range common mode rejection ratio DC Output Characteristics output voltage swing
im
12 12 2 2 -0.25 to 2.95 -0.25 to 5.25 81 85 0.020 to 2.68 0.04 to 4.96 0.05 to 2.63 0.07 to 4.9 0.11 to 2.52 0.14 to 4.67 16 30 35 60 2.5 to 5.5
output current short circuit output current recommended power supply operating range
2) For G = +1, Rf = 0.
RL = 10kΩ to Vs/2 RL = 1kΩ to Vs/2 RL= 200Ω to Vs/2
in
Notes: 1) For +5V supply, a 2Vpp condition was used.
Absolute Maximum Ratings
supply voltage maximum junction temperature storage temperature range lead temperature (10 sec) operating temperature range input voltage range θja for 8 lead SOIC θja for 8 lead MSOP 0 to +6V +175°C -65°C to +150°C +300°C -40° to +85°C +Vs + 0.5V, -Vs - 0.5V 152°C/W 206°C/W
ar
y
LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Lit No. 600312-001
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