56F6751E BD5291 ss(EN)

New Product Bulletin
Input/Output Full Swing OpAmps for Motion Sensors
BD5291 Series
High CMMR ensures ultra-precise signal amplification,
while low 1.7V operation and input/output full swing
mode results in superior performance
Product Outline
SSOP5
These opamps feature a Common-Mode Rejection Ratio (CMRR) of 70dB (min), enabling high-accuracy
amplification of ultra-small signals. This makes them ideal for sensor amp applications for acceleration (shock),
angular velocity, pressure, and more. In addition, unlike conventional input/output full-swing opamps that can
operate only as low as 1.8V, the BD5291 series supports operation from 1.7V, providing a greater margin against
supply voltage fluctuations in 1.8V systems.
VSOF5
■ Applications
■ Product Comparison
Supply
Input/Output
Voltage
Range
Range VDD [V]
[V]
Part No.
CMRR
(Min) [dB]
Input Offset
Voltage
(Max) [mV]
70
±2.5
SSOP5
(2.9x2.8x1.25)
BD5291G
1.7 to 5.5
Ideal for sensor amp applications for motion sensing (i.e. acceleration,
angular velocity, and pressure in portable gaming systems,
smartphones, and tablet PCs. Also suitable for general use, such as
microphone amps and active filters.
Package
[mm]
0 to VDD
VSOF5
(1.6x1.6x0.6)
BD5291FVE
1.8 to 5.5
Conventional
0 to VDD
45
±9
SSOP5
(2.9x2.8x1.25)
: Under development
■ Combining ease-of-use with high accuracy signal amplification
10
1.2
Output Voltage Comparison
1.1 (At Low Voltages)
8
VDD=1.8V
Common-Mode
Common-Mode
VSS=0V
Input
Input Range
Range Comparison
Comparison
6
0.9
BD5291G
Linearity maintained even at
low voltages
Offset Voltage [mV]
Output Voltage [V]
1.0
0.8
0.7
0.6
0.4
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
BD5291G
Very little change
vs. common-mode
input
0
-2
-4
-6
Conventional Full Swing Product
Small operating margin below 1.7V
0.5
4
Common
Common-Mode
Mode Input Rnage
Range
Conventional Product
Significant change
Poor CMRR
-8
-10
-0.4 -0.2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 1.9
2.0
Common-Mode Input Voltage [V]
Supply Voltage [V]
Easier to use with low-voltage operation and input/output
full-swing mode
Enables input/output full-swing operation at a supply voltage of 1.7V. This
makes it possible to maintain a wide dynamic range, even at low voltages.
Also, sufficient operating margin is ensured at 1.8V, contributing to lower
application voltages.
High Accuracy Signal Amplification
The offset voltage change point at the differential input stage does not exist,
increasing the minimum Common-Mode Rejection Ratio (CMRR) from the
conventional 45dB to 70dB. This minimizes errors due to common-mode
signals that appear at the output, ensuring high-accuracy signal amplification.
10th October,2013.
.56F6751E 10.2013
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