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MIC923
Micrel, Inc.
MIC923
410MHz Low-Power SC70 Op Amp
General Description
The MIC923 is a high-speed operational amplifier with a
gain-bandwidth product of 410MHz. The part is unity gain
stable. It has a very low 2.5mA supply current, and features
the Teeny™ SC70 package.
Supply voltage range is from ±2.5V to ±9V, allowing the
MIC923 to be used in low-voltage circuits or applications
requiring large dynamic range.
The MIC923 requires a minimum gain of +2 or –1 but is stable
driving any capacitive load. It has excellent PSRR and CMRR,
making it much easier to use than most conventional high-
speed devices. Low supply voltage, low power consumption,
and small packaging makes the MIC923 ideal for portable
equipment. The ability to drive capacitative loads also makes
it possible to drive long coaxial cables.
Features
•
•
•
•
•
•
•
•
•
•
•
410MHz gain bandwidth product
2.5mA supply current
Teeny™ SC70 packaging
2200V/µs slew rate
Drives any capacitive load
Stable with gain ≥2 or –1
Video
Imaging
Ultrasound
Portable equipment
Line drivers
Applications
Ordering Information
Part Number
Standard
MIC923BC5
Marking
A40
Pb-Free
MIC923YC5
Marking
A40
Ambient Temperature
–40ºC to +85ºC
Package
SC-70-5
Pin Configuration
IN– V– IN+
3
Functional Pinout
2
1
A40
4
5
Part
Identification
IN–
3
V– IN+
2
1
4
5
OUT
V+
OUT
V+
SC-70
SC-70
Pin Description
Pin Number
1
2
3
4
5
Teeny is a trademark of Micrel, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Pin Name
IN+
V–
IN–
OUT
V+
Pin Function
Noninverting Input
Negative Supply (Input)
Inverting Input
Output: Amplifier Output
Positive Supply (Input)
May 2006
1
MIC923
MIC923
Micrel, Inc.
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
V+
– V
V–
) ........................................... 20V
Differential Input Voltage (V
IN+
– V
IN–
)
........... 4V,
Note 3
Input Common-Mode Range (V
IN+
, V
IN–
) ............V
V+
to V
V–
Lead Temperature (soldering, 5 sec.) ........................ 260°C
Storage Temperature (T
S
) ......................................... 150°C
ESD Rating,
Note 4
................................................... 1.5kV
Operating Ratings
(Note 2)
Supply Voltage (V
S
) .........................................±2.5V to ±9V
Junction Temperature (T
J
) .......................... –40°C to +85°C
Package Thermal Resistance
SC70-5
(θ
JA
) ...................................................... 450°C/W
Electrical Characteristics (±5V)
Symbol
V
OS
V
OS
I
B
I
OS
V+ = +5V, V– = –5V, V
CM
= 0V, R
L
= 10MΩ; T
J
= 25°C,
bold
values indicate –40°C ≤ T
J
≤ +85°C; unless noted.
Parameter
Condition
Min
-5
Input Offset Voltage
V
OS
Temperature Coefficient
Input Bias Current
Input Offset Current
Input Common-Mode Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing
±3.5V < V
S
< ±9V
–2.5V < V
CM
< +2.5V
R
L
= 2kΩ, V
OUT
= ±2V
positive, R
L
= 2kΩ
-2
–3.25
75
68
65
+3
+2.7
80
87
74
77
3.6
–3.6
3.0
–2.6
320
970
65
40
78
47
2.5
9
1.1
3
–2.3
–3
Typ
0.8
15
1.7
0.3
4.5
2
+3.25
Max
5
Units
mV
µV/°C
µA
µA
V
dB
dB
dB
dB
V
V
V
V
MHz
V/µs
mA
mA
mA
nV/√Hz
pA/√Hz
V
CM
CMRR
PSRR
A
VOL
V
OUT
R
L
= 100Ω, V
OUT
= ±1V
negative, R
L
= 2kΩ
positive, R
L
= 100Ω
GBW
SR
I
SC
I
S
Gain-Bandwidth Product
Slew Rate
Short-Circuit Output Current
Supply Current
Input Voltage Noise
Input Current Noise
C
L
= 1.7pF
negative, R
L
= 100Ω,
Note 5
C=1.7pF, Av =2, R
L
= 1MΩ, R
F
= 2kΩ
negative SR = 720V/µs
source
sink
No Load
f = 10kHz
f = 10kHz
Electrical Characteristics
Symbol
V
OS
V
OS
I
B
V+ = +9V, V– = –9V, V
CM
= 0V, R
L
= 10MΩ; T
J
= 25°C,
bold
values indicate –40°C ≤ T
J
≤ +85°C; unless noted
Parameter
Condition
Min
-5
Input Offset Voltage
Input Offset Voltage
Temperature Coefficient
Input Bias Current
Input Offset Current
Input Common-Mode Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
±3.5V < V
S
< ±9V
–6.5V < V
CM
< +6.5V
–7.25
58
68
83
87
Typ
0.4
15
1.7
0.3
4.5
2
+7.25
Max
5
Units
mV
µV/°C
µA
µA
V
dB
dB
I
OS
V
CM
CMRR
PSRR
MIC923
2
May 2006
MIC923
Symbol
A
VOL
V
OUT
GBW
SR
I
SC
I
S
Parameter
Large-Signal Voltage Gain
Maximum Output Voltage Swing
Gain-Bandwidth Product
Slew Rate
Short-Circuit Output Current
Supply Current
Input Voltage Noise
Input Current Noise
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Micrel, Inc.
Condition
R
L
= 100Ω, V
OUT
= ±1V
negative, R
L
= 2kΩ
positive, R
L
= 2kΩ
R
L
= 2kΩ, V
OUT
= ±3V
Min
65
7
Typ
76
86
7.5
–7.5
410
2200
70
40
84
50
2.5
9
1.1
3
–7
Max
Units
dB
dB
V
V
MHz
V/µs
mA
mA
mA
nV/√Hz
pA/√Hz
C=1.7pF, Av =2, R
L
= 1MΩ, R
F
= 2kΩ
positive SR = 2100V/µs
source
sink
No Load
f = 10kHz
f = 10kHz
C
L
= 1.7pF, R
L
= 100Ω
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is
likely to change).
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in “Typical Characteristics.”
May 2006
3
MIC923
MIC923
Micrel, Inc.
V+
10µF
Test Circuits
Input
BNC
50Ω
0.1µF
10k
3
0.1µF
V+
R2
5k
10µF
2k
5
10k
10k
1
MIC923
2
4
BNC
Output
Input
BNC
R1 5k
R7c 2k
R7b 200Ω
R7a 100Ω
3
5
0.1µF
4
BNC
1
MIC923
2
Output
50Ω
0.1µF
Input
BNC
0.1µF
R6
5k
R3
200k
R4
250Ω
R5
5k
10µF
50Ω
0.1µF
All resistors 1%
V–
All resistors:
1% metal film
10µF
V–
R2 R2 + R 5 + R4
V
OUT
= V
ERROR
1 +
+
R1
R7
PSRR vs. Frequency
CMRR vs. Frequency
100pF
R2 4k
V+
10µF
3
V+
10µF
10pF
R1
20Ω
R3 27k
S1
S2
3
5
0.1µF
4
BNC
5
0.1µF
4
1
MIC923
2
R5
20Ω
R4 27k
10pF
0.1µF
To
Dynamic
Analyzer
V
IN
1
MIC923
2
300Ω
V
OUT
FET Probe
0.1µF
50Ω
1k
C
L
10µF
10µF
V–
V–
Noise Measurement
Closed Loop Frequency Response Measurement
MIC923
4
May 2006
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