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Featured Products
Operation from 1.7V
- ideal for portable motion sensors
Compact Sensor Amps
BD5291 Series
Optimized for 1.8V system power supplies
Robust design enables
operation even from 1.7V
Superior
common-mode
rejection ratio
Low-voltage
operation
Input-output
full swing
VSOF5
SSOP5
Low input
offset
voltage
Compact
package
Combining ease-of-use with high accuracy signal amplification
1.2
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.
Output Voltage Comparison
1.1 (At Low Voltages)
Output Voltage [V]
Input/output full-swing operation is
enabled at a supply voltage of 1.7V,
making 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
1.0
0.9
BD5291G
Linearity maintained
even at low voltages
0.8
0.7
0.6
Conventional
Full Swing Product
0.5
0.4
1.2
Small operating margin
below 1.7V
1.3
1.4
1.5
1.6
1.7
Supply Voltage [V]
1.8
1.9
: +1.7V to +5.5V
: 2.5V/μs
: -40°C to +85°C
: VSS to VDD
: 2.5mV (Max.)
: 1pA (Typ.)
8
6
4
2
Common-Mode
Input Range Comparison
Common-Mode Input Range
BD5291G
Very little change vs.
common-mode input
0
-2
-4
-6
-8
Conventional
Product
Significant change
→ Poor CMRR
Common-Mode Input Voltage [V]
Applications
■ Small-signal output sensor amps
■ Acceleration/angular velocity
sensor signal processing
■ Portable devices
■ Low voltage, small-signal
processing circuits
■ Active filters
■ Microphone amps
Characteristics Comparison
Part No.
Supply Voltage Range
(VDD) [V]
Input/Output Range
[V]
CMRR
(Min.) [dB]
Input Offset Voltage
(Max.) [mV]
Package
(mm)
1.7 to 5.5
0 to VDD
70
± 2.5
SSOP5
(2.9 × 2.8 × 1.25)
VSOF5
(1.6 × 1.6 × 0.6)
1.8 to 5.5
0 to VDD
45
±9
SSOP5
(2.9 × 2.8 × 1.25)
BD5291G
BD5291FVE
Conventional
: Under development
VDD=1.8V
VSS=0V
-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
Key Characteristics
■ Supply Voltage Range (Single Source)
■ Slew Rate
■ Operating Temp. Range
■ Common-Mode Input Range
■ Input Offset Voltage
■ Input Bias Current
10
Offset Voltage [mV]
Easier to use with low-voltage operation and input/output full-swing mode
And more
Application Block Diagram
BD5291 Series
Control System
Sensor Opeamp.
(Amplification)
VDD
1.8V
VBIAS1
1.7V to 5.5V
Sensor
(Detection)
+IN
-IN
1.8V MCU
OUT
Class AB
Control
A/D
Converter
VBIAS2
VSS
Performs high-accuracy full-swing amplification
of small signals detected by the sensor
ROHM Opamp. Lineup (Ideal for Sensors)
Part No.
BD5291G
BD5291FVE
BU7295HFV
BU7261G
BU7262F
BU7262FVM
BU7262NUX
BU7264F
BU7264FV
BU7275HFV
BU7241G
BU7242F
BU7242FVM
BU7242NUX
BU7244F
BU7244FV
BU7271G
BU7205HFV
BU7265G
BU7266F
BU7266FV
BU7266FVM
BU7255HFV
BU7291G
:Under development
Operating
No.
Voltage Range Circuit Current
of
(Typ.) [µA]
(VDD)[V]
Circuits
Input Offset
Voltage
(Max.) [mV]
CMRR
(Min.) [dB]
Gain Bandwidth
Product
(Typ.) [MHz]
Slew Rate
(Typ.) [V/µs]
1
1.7 to 5.5
650
± 2.5
70
3.2
2.5
1
1
1.8 to 5.5
1.8 to 5.5
150
250
±6
±9
45
45
1
2
1
1.1
2
1.8 to 5.5
550
±9
45
2
1.1
4
1.8 to 5.5
1100
±9
45
2
1.1
1
1
1.8 to 5.5
1.8 to 5.5
40
70
±6
±9
45
45
0.6
0.9
0.3
0.4
2
1.8 to 5.5
180
±9
45
0.9
0.4
4
1.8 to 5.5
360
±9
45
0.9
0.4
1
1
1
1.8 to 5.5
1.8 to 5.5
1.8 to 5.5
8.6
0.4
0.35
±8
± 9.5
± 8.5
45
45
45
0.09
0.0025
0.004
0.05
0.0025
0.0024
2
1.8 to 5.5
0.7
± 8.5
45
0.004
0.0024
1
1
2.4 to 5.5
2.4 to 5.5
±9
±9
40
40
4
2.8
3.4
3
540
470
Package
SSOP5
VSOF5
HVSOF5
SSOP5
SOP8
MSOP8
VSON008X2030
SOP14
SSOP-B14
HVSOF5
SSOP5
SOP8
MSOP8
VSON008X2030
SOP14
SSOP-B14
SSOP5
HVSOF5
SSOP5
SOP8
SSOP-B8
MSOP8
HVSOF5
SSOP5
The content specified in this document is correct as of December 1st, 2013.
[O_028] Catalog No.56O6749E 12.2013 ROHM © PDF
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