HT9291/HT9292/HT9294 TinyPowerTM Operation Amplifier

HT9291/HT9292/HT9294
TinyPowerTM Operation Amplifier
Features
General Description
• Wide operating voltage: 1.4V to 5.5V
The Holtek HT9291/HT9292/HT9294 range of Low
Power Operation Amplifiers offer the advantage of
a single supply voltage down to as low as 1.4V as
well as the advantages of an extremely low quiescent
current of only 0.6µA/amplifier. One other major
advantage of these devices lie in their rail-to-rail
voltage operation for maximum range. The devices
also provide a typical gain bandwidth product of
11kHz and are also unity gain stable. The devices are
available in a range of packages according the number
of internal amplifiers. The special characteristics
of these devices will ensure their excellent use in
applications with stringent low power demands such
as portable products, battery powered equipment, low
power sensor signal processing etc.
• Low quiescent current: typical 0.6µA/amplifier
• Rail-to-Rail output
• Gain bandwidth: 11kHz typical
• Unity gain stable
• Available in Single, Dual and Quad OP′s package
types
• Package type:
♦♦ HT9291: SOT23-5
♦♦ HT9292: 8-pin DIP/SOP
♦♦ HT9294: 14-pin DIP/SOP
Applications
• Wearable products
Selection Table
• Temperature measurement
• Battery powered products
• Portable equipment
• Low power sensors
Part No.
Amplifiers
Package
HT9291
1
SOT23-5
HT9292
2
8DIP/SOP
HT9294
4
14DIP/SOP
Block Diagram
Pin Assignment
Rev. 1.20
1
September 10, 2013
HT9291/HT9292/HT9294
Pin Descriptions
HT9291
Pin No.
Pin Name
1
OUT
Analog output
Description
2
VSS
Negative power supply
3
IN+
Non-inverting input
4
IN-
Inverting input
5
VDD
Pin No.
Pin Name
1
1OUT
Analog output (operation amplifier 1)
2
1IN-
Inverting input (operation amplifier 1)
3
1IN+
Non-inverting input (operation amplifier 1)
4
VSS
Negative power supply
5
2IN+
Non-inverting input (operation amplifier 2)
6
2IN-
Inverting input (operation amplifier 2)
7
2OUT
Analog output (operation amplifier 2)
8
VDD
Positive power supply
Pin No.
Pin Name
1
1OUT
Analog output (operation amplifier 1)
2
1IN-
Inverting input (operation amplifier 1)
3
1IN+
Non-inverting input (operation amplifier 1)
4
VDD
Positive power supply
5
2IN+
Non-inverting input (operation amplifier 2)
6
2IN-
Inverting input (operation amplifier 2)
7
2OUT
Analog output (operation amplifier 2)
8
3OUT
Analog output (operation amplifier 3)
9
3IN-
Inverting input (operation amplifier 3)
10
3IN+
Non-inverting input (operation amplifier 3)
11
VSS
Negative power supply
12
4IN+
Non-inverting input (operation amplifier 4)
13
4IN-
Inverting input (operation amplifier 4)
14
4OUT
Analog output (operation amplifier 4)
Positive power supply
HT9292
Description
HT9294
Rev. 1.20
Description
2
September 10, 2013
HT9291/HT9292/HT9294
Absolute Maximum Ratings
Supply Voltage ......................................................6.0V
Input Voltage ............................... VSS-0.3V~VDD+0.3V
Difference Input Voltage ............................ ±(VDD-VSS)
ESD protection on all pins (HBM;MM)....≥4kV; 400V
Storage Temperature......................... −65°C to +150°C
Operating Temperature......................... −40°C to 85°C
Junction Temperature.......................................... 150°C
Note: These are stress ratings only. Stresses exceeding the range specified under ″Absolute Maximum Ratings″
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
Electrical Characteristics
Unless otherwise indicated, VSS=GND, Ta=25°C, VCM=VDD/2, VL=VDD/2, and RL=1MΩ to VL, CL=60pF
Symbol
Parameter
Test Conditions
Conditions
VDD
Typ.
Max.
Unit
VDD
Supply Voltage
—
1.4
—
5.5
V
VOS
Input Offset Voltage
5V
VIN=VCM/2
−5.0
—
5.0
mV
5V
VIN=VCM/2
—
±2
—
µV/°C
∆VOS/∆T Drift with Temperature
—
Min.
IOS
Input Offset Current
5V
Ta=25°C
—
±5
—
pA
IB
Input Bias Current
5V
Ta=25°C
—
±50
—
pA
VCM
Input Common Mode Range
5V
0
—
VDD−1.2
V
VSS+10
—
VDD−10
mV
VSS+20
—
VDD−50
mV
—
VOH
Maximum Output Voltage Swing
5V
0.5V input overdrive
RL=1MΩ to VL
VOL
Maximum Output Voltage Swing
5V
0.5V input overdrive
RL=50kΩ to VL
AOL
DC Open-Loop Gain
(large signal)
5V
VOUT=0.2V to VDD−0.2V,
VIN=VCM/2
70
100
—
dB
GBW
Gain BandWidth Product
5V
RL=1MΩ, CL=60pF, VIN=VCM/2
—
11
—
kHz
—
50
—
°
Φm
Phase Margin
5V
RL=1MΩ, CL=60pF
G=+1V/V, VIN+= VDD/2
CMRR
Common Mode Rejection Ratio
5V
VCM=0V to VDD−1.4V
60
90
—
dB
PSRR
Power Supply Rejection Ratio
5V
VCM = 0.2V
65
95
—
dB
ICC
Supply Current Per Single Amplifier
5V
Io=0A for HT9291
0.50
0.80
1.20
µA
Io=0A for HT9292/HT9294
0.30
0.60
1.00
µA
SR
Slew Rate at Unity Gain
5V
RL=1MΩ, CL=60pF
—
5
—
V/ms
5V
VIN+ − VIN- ≥ 10mV
−0.3
−1.2
—
mA
5V
VIN- − VIN+ ≥ 10mV
1
4
—
mA
IO_SOURCE Output Short Circuit Source Current
IO_SINK
Rev. 1.20
Output Short Circuit Sink Current
3
September 10, 2013
HT9291/HT9292/HT9294
Functional Description
Input Stage
Output Stage
The input stage of op amps are nominal PMOS
differential amplifiers (see the following diagram),
therefore the common mode input voltage can extend
to VSS-0.6V. On the other hand the common mode
input voltage has to be maintained below (VDD−1.2V)
to keep the input device (M2 and M3) active. This
implies that when using HT9291/HT9292/HT9294 as
a voltage follower, the input as well as output active
range will be limited between VSS~VDD-1V (approx.).
Avoid applying any voltage greater than VDD+0.6V
or less than VSS-0.6V to the input pins, otherwise the
internal input protection devices may be damaged.
The HT9291/HT9292/HT9294 uses push-pull CMOS
configuration as the output stage of op amps to
minimize low power consumption and to provide
adequate output driving current.
V
Note that the output is an unbuffered structure,
therefore the open loop gain will be affected by the
load resistor since the voltage gain of this stage can be
expressed as (gm5+ gm6)×RL.
D D
V
B IA S
M 1
N o n in v e r tin g In
In v e r tin g In
M 2
P M O S
M 4
S S
M 3
P M O S
M 5
V
Because of the consideration for minimized power
consumption, the output short circuit current is
limited to about -1.2mA for source drive and 4mA for
sink drive. This is believed to be enough for most low
power systems, however it is recommended to use
the load resistor of >1MΩ for normal applications. In
case of heavy load driving, an external buffer stage
using bipolar transistors is recommended.
T o O u tp u t S ta g e
V
S S
Since the input impedance of PMOS is inherently
very high, it can directly couple to high impedance
elements without loading effect. For example,
coupling to ceramic transducers, integrating capacitor
and resistor networks.
The HT9291/HT9292/HT9294 is internally
compensated for AC stability and capable to withstand
up to a 60pF capacitive load.
Actually the extremly high input impedance is its
major advantage over the bipolar counterpart, in some
application fields such as integrators where the input
current of op amp can cause significant error.
Application Circuits
Two Op Amp Instrumentation Amplifier
High Side Battery Current Sensor
Rev. 1.20
4
September 10, 2013
HT9291/HT9292/HT9294
Package Information
Note that the package information provided here is for consultation purposes only. As this information may be
updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package
information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be
transferred to the relevant website page.
• Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
• Packing Meterials Information
• Carton information
• PB FREE Products
• Green Packages Products
Rev. 1.20
5
September 10, 2013
HT9291/HT9292/HT9294
5-pin SOT23-5 Outline Dimensions
Symbol
Min.
Nom.
Max.
A
0.030
—
0.031
A1
0.000
—
0.002
A2
0.028
0.030
0.031
b
0.014
—
0.020
C
0.004
—
0.008
D
—
0.114 BSC
—
E
—
0.110 BSC
—
E1
—
0.063 BSC
—
e
—
0.037 BSC
—
e1
—
0.075 BSC
—
L
0.015
0.018
0.024
L1
—
0.024 BSC
—
θ
0°
—
8°
Symbol
Rev. 1.20
Dimensions in inch
Dimensions in mm
Min.
Nom.
Max.
A
0.75
—
0.80
A1
0.00
—
0.05
A2
0.70
0.75
0.78
b
0.35
—
0.50
C
0.10
—
0.20
D
—
2.90 BSC
—
E
—
2.80 BSC
—
E1
—
1.60 BSC
—
e
—
0.95 BSC
—
e1
—
1.90 BSC
—
L
0.37
0.45
0.60
L1
—
0.60 BSC
—
θ
0°
—
8°
6
September 10, 2013
HT9291/HT9292/HT9294
8-pin DIP (300mil) Outline Dimensions
Symbol
Nom.
Max.
A
0.355
0.365
0.400
B
0.240
0.250
0.280
C
0.115
0.130
0.195
D
0.115
0.130
0.150
E
0.014
0.018
0.022
F
0.045
0.060
0.070
G
—
0.100 BSC
—
H
0.300
0.310
0.325
I
—
—
0.430
Symbol
Rev. 1.20
Dimensions in inch
Min.
Dimensions in mm
Min.
Nom.
Max.
10.16
A
9.02
9.27
B
6.10
6.35
7.11
C
2.92
3.30
4.95
D
2.92
3.30
3.81
E
0.36
0.46
0.56
F
1.14
1.52
1.78
G
—
2.54 BSC
—
H
7.26
7.87
8.26
I
—
—
10.92
7
September 10, 2013
HT9291/HT9292/HT9294
14-pin DIP (300mil) Outline Dimensions
Symbol
Min.
Nom.
Max.
A
0.735
0.750
0.775
B
0.240
0.250
0.280
C
0.115
0.130
0.195
D
0.115
0.130
0.150
E
0.014
0.018
0.022
F
0.045
0.060
0.070
G
—
0.10 BSC
—
H
0.300
0.310
0.325
I
—
—
0.430
Symbol
Rev. 1.20
Dimensions in inch
Dimensions in mm
Min.
Nom.
Max.
A
18.67
19.05
19.69
B
6.10
6.35
7.11
C
2.92
3.30
4.95
D
2.92
3.30
3.81
E
0.36
0.46
0.56
F
1.14
1.52
1.78
G
—
2.54 BSC
—
H
7.62
7.87
8.26
I
—
—
10.92
8
September 10, 2013
HT9291/HT9292/HT9294
8-pin SOP (150mil) Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
—
0.236 BSC
—
B
—
0.154 BSC
—
C
0.012
—
0.020
C′
—
0.193 BSC
—
D
—
—
0.069
E
—
0.050 BSC
—
F
0.004
—
0.010
G
0.016
—
0.050
H
0.004
—
0.010
α
0°
—
8°
Symbol
Rev. 1.20
Dimensions in mm
Min.
Nom.
Max.
A
—F
6.00 BSC
—
B
—
3.90 BSC
—
C
0.31
—
0.51
C′
—
4.90 BSC
—
D
—
—
1.75
E
—
1.27 BSC
—
F
0.10
—
0.25
G
0.40
—
1.27
H
0.10
—
0.25
α
0°
—
8°
9
September 10, 2013
HT9291/HT9292/HT9294
14-pin SOP (150mil) Outline Dimensions
Symbol
A
Dimensions in inch
Min.
Nom.
Max.
—
0.236 BSC
—
B
—
0.154 BSC
—
C
0.012
—
0.020
C′
—
0.341 BSC
—
D
—
—
0.069
E
—
0.050 BSC
—
F
0.004
—
0.010
G
0.016
—
0.050
H
0.004
—
0.010
α
0°
—
8°
Symbol
Rev. 1.20
Dimensions in mm
Min.
Nom.
Max.
—
A
—
6.00 BSC
B
—
3.90 BSC
—
C
0.31
—
0.51
C′
—
8.65 BSC
—
D
—
—
1.75
E
—
1.27 BSC
—
F
0.10
—
0.25
G
0.40
—
1.27
H
0.10
—
0.25
α
0°
—
8°
10
September 10, 2013
HT9291/HT9292/HT9294
Copyright© 2013 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time
of publication. However, Holtek assumes no responsibility arising from the use of
the specifications described. The applications mentioned herein are used solely
for the purpose of illustration and Holtek makes no warranty or representation that
such applications will be suitable without further modification, nor recommends
the use of its products for application that may present a risk to human life due to
malfunction or otherwise. Holtek's products are not authorized for use as critical
components in life support devices or systems. Holtek reserves the right to alter
its products without prior notification. For the most up-to-date information, please
visit our web site at http://www.holtek.com.tw.
Rev. 1.20
11
September 10, 2013