April 2006 1 MIC6211
MIC6211 Micrel, Inc.
MIC6211
IttyBitty™ Operational Amplifier
General Description
The MIC6211 IttyBitty™ op amp is a general-purpose, high-
performance, single- or split-supply, operational amplifier in
a space-saving, surface-mount package.
The MIC6211 operates from 4V to 32V, single or differential
(split) supply. The input common-mode range includes ground.
The device features a 2.5MHz unity gain bandwidth, 6V/µs
slew rate, and is internally unity-gain compensated.
Inputs are protected against reverse polarity (input voltage
less than V–) and ESD (electrostatic discharge). Output is
current limited for both sourcing and sinking. Output short
circuits of unlimited duration are allowed, provided the power
dissipation specification is not exceeded.
The MIC6211 is available in the tiny, 5-lead SOT-23-5 sur-
face-mount package.
Functional Configuration
OUT
V+IN–
IN+
13
4 5
2
V–
SOT-23-5 (M5)
Features
• 4V to 32V operation
• Small footprint package
• Unity gain stable
• 2.5 MHz unity gain bandwidth
• 6V/µs typical slew rate
• Short circuit protected
Applications
• Analog blocks
• Active filtering
Pin Description
Pin Number Pin Name Pin Function
1 OUT Amplifier Output
2 V– Negative Supply: Negative supply for split supply application or ground for
single supply application.
3 IN+ Noninverting Input
4 IN– Inverting Input
5 V+ Positive Supply
Pin Configuration
Part
Identification
OUT
V+IN–
IN+
A11
13
4 5
2
V–
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
IttyBitty is a trademark of Micrel, Inc.
Ordering Information
Part Number Marking Temp. Range Package
Standard Pb-Free Standard Pb-Free
MIC6211-BM5 MIC6211-YM5 A11 A11 –40ºC to +85ºC SOT-23-5
MIC6211 Micrel, Inc.
MIC6211 2 April 2006
Electrical Characteristics (Differential Supply)
V+ = +15V, V– = –15V, VCM = 0V; RL = 2kΩ; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C, TA = TJ; unless noted
Symbol Parameter Condition Min Typ Max Units
VOS Input Offset Voltage 2 7 mV
TCVOS Average Input Offset Drift Note 1 7 µV/°C
IB Input Bias Current 50 250 nA
IOS Input Offset Current 8 30 nA
VCM Input Voltage Range +13.5 +13.8 V
–15.0 –15.3 V
CMRR Common Mode Rejection Ratio VCM = +13.5V, –15.0V 65 100 dB
PSRR Power Supply Rejection Ratio VS = ±2.5V to ±15V 65 110 dB
AVOL Large Signal Voltage Gain VO = ±10V 25 180 V/mV
VOUT Maximum Output Voltage Swing ±12.5 ±14 V
BW Bandwidth 2.5 MHz
SR Slew Rate 6 V/µs
ISC Output Short Circuit Current Sourcing or sinking 30 50 mA
IS Supply Current 1.3 2.0 mA
Electrical Characteristics (Single Supply)
V+ = +5V, V– = 0V, VCM = 0.1V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C, TA = TJ; unless noted
Symbol Parameter Condition Min Typ Max Units
VOS Input Offset Voltage 2 7 mV
TCVOS Average Input Offset Drift Note 1 7 µV/°C
IB Input Bias Current 65 250 nA
IOS Input Offset Current 8 30 nA
VCM Input Voltage Range +3.5 +3.7 V
0 –0.3 V
CMRR Common Mode Rejection Ratio VCM = 0V to 3.5V 45 70 dB
PSRR Power Supply Rejection Ratio VS = ±2.5V to ±15V 65 105 dB
AVOL Large Signal Voltage Gain VO = 1.5V to 3.5V, RL = 2k 15 170 V/mV
VOUT Maximum Output Voltage Swing RL = 10k to GND +3.8 +4.0 V
RL = 10k to +5V +1.0 +1.2 V
ISC Output Short Circuit Current Sourcing or sinking 20 40 mA
IS Supply Current 1.2 1.8 mA
General Note: Devices are ESD protected; however, handling precautions are recommended.
Note 1: Not production tested.
Absolute Maximum Ratings
Supply Voltage (VV+ – VV–) ............................. 36V or ±18V
Differential Input Voltage (VIN+ – VIN–) ........................ ±36V
Input Voltage (VIN+, VIN–) ......................(VV– – 0.3V) to VV+
Output Short Circuit Current Duration ...............................∞
Operating Ratings
Supply Voltage .....................................................4V to 32V
Ambient Temperature Range ...................... –40°C to +85°C
SOT-23-5 Thermal Resistance (θJA) .......................... 220°C/W
(mounted to printed circuit board)
April 2006 3 MIC6211
MIC6211 Micrel, Inc.
Typical Characteristics
GND
+10V
–10V
INPUT VOLTAGE OUTPUT VOLTAGE
Large-Signal Transient Response
–10V
GND
+10V
AV = +1
RL = 2k
CL = 10pF
VS = 15V
2µs/DIV
GND
+50mV
–50mV
INPUT VOLTAGE OUTPUT VOLTAGE
Small-Signal Transient Response
–50mV
GND
+50mV
AV = +1
RL = 2k
CL = 100pF
VS = 15V
500ns/DIV
30
40
50
60
70
80
90
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Input Bias Current
vs. Temperature
V
S
= 5V
V
S
= ±15V
0
5
10
15
20
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Input Offset Current
vs. Temperature
V
S
= ±15V
V
S
= 5V
0
0.5
1.0
1.5
0 5 10 15 20 25 30
SUPPLY VOLTAGE (V)
Supply Current
vs. Supply Voltage
-20
0
20
40
60
80
100
120
10.
0
1.0
1
01
001
00
0
,1
000,01
FREQUENCY (kHz)
Voltage Gain
vs. Frequency
V
S
= ±15V
-20
-10
0
10
20
30
270
225
180
135
90
45
0.1 1.0 10
(ESAHP °)
FREQUENCY (MHz)
GAIN
PHASE
Gain and Phase
vs. Frequency
V
S
= ±15V
72°
1.0
1.1
1.2
1.3
1.4
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Supply Current
vs. Temperature
VS = ±15V
VS = 5V
MIC6211 Micrel, Inc.
MIC6211 4 April 2006
NOISE VOLTAGE (4µV/DIV)
0.1Hz to 10Hz Noise
VS = 15V
1s/DIV
NOISE VOLTAGE (5µV/DIV)
Wideband Noise
VS = 15V
5ms/DIV
0
5
10
15
20
25
30
10 100 1000 3000
FREQUENCY (kHz)
Large-Signal
Frequency Response
VS = ±15V
RL = 2k
TA = 25°C
50
60
70
80
90
100
110
0.01 0.1 1 10 100 1000
FREQUENCY (kHz)
Common Mode Rejection Ratio
vs. Frequency
V
S
= ±15V
40
45
50
55
60
65
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Short Circuit Current
vs. Temperature
V
S
= ±15V
50
60
70
80
90
100
110
120
130
0.001 0.01 0.1 1 10 100
FREQUENCY (kHz)
Power Supply Rejection
Ratio vs. Frequency
V
S
= ±15V
+PSRR
-PSRR
April 2006 5 MIC6211
MIC6211 Micrel, Inc.
Functional Diagram
20Ω
20Ω
V+
VOUT
V–
(GND)
–IN
+IN
MIC6211
CC
4
3
5
1
2
MIC6211 Micrel, Inc.
MIC6211 6 April 2006
Applications Information
Common-Mode Range and Output Voltage
The input common-mode range of the MIC6211 is from the
negative supply voltage to 1.2V below the positive supply
voltage. The output voltage swings within 1V of the positive
and negative supply voltage.
Voltage Buffer
Figure 1 shows a standard voltage follower/buffer. The output
voltage equals the input voltage. This circuit is used to buffer
a high impedance signal source. This circuit works equally
well with single or split supplies.
3
1
4
VIN
VOUT= VIN
VOUT
Figure 1. Voltage Buffer
Inverting Amplifier
Figure 2 shows an inverting amplifier with its gain set by the
ratio of two resistors. This circuit works best with split supplies,
but will perform with single supply systems if the non-invert-
ing input (+ input) is biased up above ground.
3
1
4
VIN
VOUT
R1
R2
VOUT = –VIN
R1
R2
Figure 2. Inverting Amplifer
Voltage Controlled Current Sink
Figure 3 is a voltage controlled current sink. A buffer transis-
tor forces current through a programming resistor until the
feedback loop is satisfied. Current flow is VIN/R. This circuit
works with single or split supplies.
3
1
4
VIN
R
IV
IN
R
Figure 3. Voltage Controlled Current Sink
High-Pass Filter
Figure 4 is an active filter with 20dB (10×) gain and a low-
frequency cutoff of 10Hz. The high gain-bandwidth of the
MIC6211 allows operation beyond 100kHz. This filter con-
figuration is designed for split supplies.
1µF 1µF
4
3
332k
0.1µF
7.5k
VIN
VOUT
1
Figure 4a. High-Pass Filter
-20
-10
0
10
20
30
1
10
100
1,000
10,000
100,000
VOUT (dB)
FREQUENCY (Hz)
1 10 1k 100k
Figure 4b. High-Pass Filter Response
Summing Amplifier
Figure 5 is a single supply summing amplifier. In this con-
figuration, the output voltage is the sum of V1 and V2, minus
the sum of V3 and V4. By adding more resistors to either
the inverting or non-inverting input, more voltages may be
summed. This single supply version has one important re-
striction: the sum of V1 and V2 must exceed the sum of V3
and V4, since the output voltage cannot pull below zero with
only a single supply.
VOUT
V2
V4
V3
V1 R
R
R
R
R
R
All resistors are equal.
VOUT
= V1 + V2 – V3 – V4
V1 + V2 > V3 + V4 for single supply operation
1
3
4
Figure 5. Summing Amplifier
April 2006 7 MIC6211
MIC6211 Micrel, Inc.
Package Information
SOT-23-5 (M5)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 1999 Micrel, Incorporated.
