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PDF BU7271G Data sheet ( Hoja de datos )
| Número de pieza | BU7271G | |
| Descripción | Ultra Low Supply Current CMOS Operational Amplifiers | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Operational Amplifiers
Ultra Low Supply Current
CMOS Operational Amplifiers
BU7271G BU7271SG
General Description
The BU7271G is low voltage operation input/output full
swing ultra-low supply current CMOS operational
amplifiers. The BU7271SG has an extended operating
temperature range. They have feature of low supply
current and low input bias current. There are suitable
for battery-powered equipments and sensor amplifiers.
Features
Ultra Low Supply Current
Low Operating Supply Voltage
Wide Operating Temperature Range
Low Input Bias Current
Key Specifications
Operating Supply Voltage (single supply):
+1.8V to +5.5V
Supply Current:
8.6µA(Typ)
Temperature Range:
BU7271G
-40°C to +85°C
BU7271SG
-40°C to +105°C
Input Offset Current:
1pA (Typ)
Input Bias Current:
1pA (Typ)
Packages
SSOP5
W(Typ) x D(Typ) x H(Max)
2.90mm x 2.80mm x 1.25mm
Applications
Sensor Amplifier
Consumer Equipment
Battery-powered Equipment
Portable Equipment
Simplified Schematic
VDD
Vbias
IN+
Class
AB control
OUT
IN-
VSS
Vbias
Figure 1. Simplified Schematic
○Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
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BU7271G BU7271SG
Typical Performance Curves
○BU7271G, BU7271SG
0.8
0.8
Datasheet
0.6
BU7271G
0.4
0.6
BU7271SG
0.4
0.2 0.2
0.0
0
85
25 50 75 100
Ambient Temperature [°C]
125
Figure 2.
Power Dissipation vs Ambient Temperature
(Derating Curve)
0.0
0
105
25 50 75 100
Ambient Temperature [°C]
125
Figure 3.
Power Dissipation vs Ambient Temperature
(Derating Curve)
16 16
14 14
105°C
5.5V
12
85°C
12
3.0V
10 10
8
25°C
6
-40°C
4
8
1.8V
6
4
22
0
123456
Supply Voltage [V]
Figure 4.
Supply Current vs Supply Voltage
0
-50
-25 0 25 50 75 100 125
Ambient Temperature [°C]
Figure 5.
Supply Current vs Ambient Temperature
(*)The above characteristics are measurements of typical sample, they are not guaranteed.
BU7271G: -40C to +85C BU7271SG: -40C to +105C
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
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BU7271G BU7271SG
Application Information
NULL method condition for Test circuit1
Parameter
Input Offset Voltage
Large Signal Voltage Gain
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
Power Supply Rejection Ratio
- Calculation -
1. Input Offset Voltage (VIO)
2. Large Signal Voltage Gain (AV)
3. Common-mode Rejection Ration (CMRR)
4. Power supply rejection ratio (PSRR)
Datasheet
VDD, VSS, EK, VICM Unit:V
VF SW1 SW2 SW3 VDD VSS EK VICM Calculation
VF1 ON ON OFF 3
VF2 ON ON ON
VF3
3
VF4 ON ON OFF
VF5
3
VF6 ON ON OFF 1.8
VF7 ON ON OFF 5.5
0 -1.5 3
-0.5
0 1.5
-2.5
0
0 -1.5
3
0 -0.9 0
0 -0.9 0
1
2
3
4
VIO =
|VF1|
1 + RF/RS
[V]
EK × (1+RF/RS)
Av = 20Log
|VF3 - VF2|
[dB]
VICM × (1+RF/RS)
CMRR = 20Log
|VF5 - VF4|
[dB]
VDD × (1+ RF/RS)
PSRR = 20Log
|VF7 - VF6|
[dB]
0.1μF
SW1
VDD
RF=50kΩ
500kΩ
RS=50Ω
RI=1MΩ
0.015μF 0.015μF
DUT
EK
Vo
500kΩ
VICM
RS=50Ω
RI=1MΩ
SW3
RL
1000pF
50kΩ
SW2
VSS
VRL
Figure 25. Test Circuit 1
0.01μF
15V
NULL
-15V
V VF
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
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11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet BU7271G.PDF ] | |
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