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PDF LMR821G Data sheet ( Hoja de datos )
| Número de pieza | LMR821G | |
| Descripción | Low Power Ground Sense Operational Amplifiers | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Operational Amplifiers
Low Power Ground Sense
Operational Amplifiers
LMR821G
●General Description
Ground Sense Low Voltage Op-Amp integrates single
Op-Amp on a single chip. Especially, these series are
operable with low voltage and low supply current.
●Features
Low operating supply voltage
Input Ground Sense, Output Full Swing
High large signal voltage gain
High Slew Rate
Low supply current
Low input offset voltage
●Applications
Customer electronics
Buffer
Active filter
Mobile equipment
●Key Specifications
Low Operating Supply Voltage (single supply):
High voltage gain (RL=600Ω):
Wide Temperature Range:
High Slew Rate:
Low Input Offset Voltage:
Low Input Bias Current:
+2.5V to +5.0V
105dB (Typ.)
-40°C to +85°C
2.0V/μs (Typ.)
3.5mV (Max.)
30nA (Typ.)
●Package
SSOP5
W(Typ.) xD(Typ.) xH(Max.)
2.90mm x 2.80mm x 1.25mm
●Simplified Schematic
VDD
+IN
OUT
-IN class
AB control
VSS
Figure 1. Simplified Schematic (1 channel only)
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays.
www.rohm.com
©2013 ROHM Co., Ltd. All rights reserved.
TSZ22111･14･001
1/18
TSZ02201-0RAR1G200490-1-2
18.JAN.2013 Rev.001
Free Datasheet http://www.datasheet4u.com/
1 page  
LMR821G
Datasheet
Description of electrical characteristics
Described here are the terms of electric characteristics used in this datasheet. Items and symbols used are also shown.
Note that item name and symbol and their meaning may differ from those on another manufacture’s document or general
document.
1. Absolute maximum ratings
Absolute maximum rating item indicates the condition which must not be exceeded. Application of voltage in excess of absolute
maximum rating or use out of absolute maximum rated temperature environment may cause deterioration of characteristics.
1.1 Power supply voltage (VDD/VSS)
Indicates the maximum voltage that can be applied between the positive power supply terminal and negative power
supply terminal without deterioration or destruction of characteristics of internal circuit.
1.2 Differential input voltage (Vid)
Indicates the maximum voltage that can be applied between non-inverting terminal and inverting terminal without
deterioration and destruction of characteristics of IC.
1.3 Input common-mode voltage range (Vicm)
Indicates the maximum voltage that can be applied to non-inverting terminal and inverting terminal without
deterioration or destruction of characteristics. Input common-mode voltage range of the maximum ratings not assures
normal operation of IC. When normal Operation of IC is desired, the input common-mode voltage of characteristics
item must be followed.
1.4 Power dissipation (Pd)
Indicates the power that can be consumed by specified mounted board at the ambient temperature 25℃(normal temperature).
As for package product, Pd is determined by the temperature that can be permitted by IC chip in the package
(maximum junction temperature) and thermal resistance of the package.
2.Electrical characteristics item
2.1 Input offset voltage (Vio)
Indicates the voltage difference between non-inverting terminal and inverting terminal. It can be translated into the
input voltage difference required for setting the output voltage at 0 V.
2.2 Input offset voltage drift (△Vio/△T)
Denotes the ratio of the input offset voltage fluctuation to the ambient temperature fluctuation.
2.3 Input offset current (Iio)
Indicates the difference of input bias current between non-inverting terminal and inverting terminal.
2.4 Input bias current (Ib)
Indicates the current that flows into or out of the input terminal. It is defined by the average of input bias current at
non-inverting terminal and input bias current at inverting terminal.
2.5 Circuit current (IDD)
Indicates the IC current that flows under specified conditions and no-load steady status.
2.6 Maximum Output Voltage(High) / Maximum Output Voltage(Low) (VOH/VOL)
Indicates the voltage range that can be output by the IC under specified load condition. It is typically divided into
maximum output voltage High and low. Maximum output voltage high indicates the upper limit of output voltage.
Maximum output voltage low indicates the lower limit.
2.7 Output source current/ output sink current (Isource/Isink)
The maximum current that can be output under specific output conditions, it is divided into output source current and
output sink current. The output source current indicates the current flowing out of the IC, and the output sink current
the current flowing into the IC.
2.8 Large signal voltage gain (Av)
Indicates the amplifying rate (gain) of output voltage against the voltage difference between non-inverting terminal
and inverting terminal. It is normally the amplifying rate (gain) with reference to DC voltage.
Av = (Output voltage fluctuation) / (Input offset fluctuation)
2.9 Input common-mode voltage range (Vicm)
Indicates the input voltage range where IC operates normally.
2.10 Common-mode rejection ratio (CMRR)
Indicates the ratio of fluctuation of input offset voltage when in-phase input voltage is changed. It is normally the
fluctuation of DC.
CMRR = (Change of Input common-mode voltage)/(Input offset fluctuation)
2.11 Power supply rejection ratio (PSRR)
Indicates the ratio of fluctuation of input offset voltage when supply voltage is changed. It is normally the fluctuation of
DC. PSRR= (Change of power supply voltage)/(Input offset fluctuation)
2.12 Slew rate (SR)
Indicates the time fluctuation ratio of voltage output when step input signal is applied.
2.13 Gain Band Width (GBW)
Indicates to multiply by the frequency and the gain where the voltage gain decreases 6dB/octave.
2.14 Phase Margin (θ)
Indicates the margin of phase from 180 degree phase lag at unity gain frequency.
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©2013 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
5/18
TSZ02201-0RAR1G200490-1-2
18.JAN.2013 Rev.001
Free Datasheet http://www.datasheet4u.com/
5 Page 
LMR821G
●Typical Performance Curves (Reference data) – Continued
○LMR821G
140
130
120
110
-40℃
100
90
85℃
25℃
80
2
3 45
SUPPLY VOLTAGE [V]
6
Figure 18.
Common Mode Rejection Ratio – Supply Voltage
(VDD=2.7V)
Datasheet
140
130
120
110
100
5.0V
2.7V
90
80
-50
-25 0 25 50 75 100
AMBIENT TEMPERATURE [℃]
Figure 19.
Common Mode Rejection Ratio – Ambient Temperature
140
130
120
110
100
90
80
-50
-25 0 25 50 75 100
AMBIENT TEMPERATURE [℃]
Figure 20.
Power Supply Rejection Ratio – Ambient Temperature
(VDD=2.7V~5.0V)
3.0
2.5
2.0
1.5
5.0V
2.7V
1.0
0.5
0.0
-50
-25 0 25 50 75 100
AMBIENT TEMPERATURE [℃]
Figure 21.
Slew Rate L-H – Ambient Temperature
(*)The data above is measurement value of typical sample, it is not guaranteed.
www.rohm.com
©2013 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
11/18
TSZ02201-0RAR1G200490-1-2
18.JAN.2013 Rev.001
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
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| PDF Descargar | [ Datasheet LMR821G.PDF ] | |
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