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+ Reference. CN951 Datasheet |
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CONSONANCE
Low-Power, Single-Supply
Op Amp + Comparator + Reference
CN951
General Description
The CN951 features combinations of a low power
operational amplifier, comparator and reference in an
8-pin SOP package. In the CN951, the comparator’s
inverting input is connected to an internal 1.211V
±2% bandgap reference. The CN951 operates from a
single 2.5V to 5.5V supply with a typical supply
current of 15uA. Both the op amp and comparator
feature a common-mode input voltage range that
extends from the negative supply rail to the positive
supply rail, as well as output stages that swing
Rail-to-Rail.
The op amp in the CN951 is internally compensated
to be unity-gain stable with 20V/ms slew rate. The
op amp has a unique output stage that enables it to
operate with a low supply current while maintaining
linearity under loaded conditions. In addition, the
device has been designed to exhibit good DC
characteristics over the entire operating temperature
range. In addition, the comparator contains a ±7mV
(14mV) internal hysteresis to ensure clean output
switching, even with slow-moving input signals.
Applications
Instruments, Terminals, and Bar-Code Readers
Battery-Powered Systems
Automotive Keyless Entry
Low-Frequency, Local-Area Alarms/Detectors
Photodiode Preamps
Smart Cards
Infrared Receivers for Remote Controls
Smoke Detectors and Safety Sensors
Features
Op Amp + Comparator + Reference
Operating Current: 15uA
Rail-to-Rail Inputs and Outputs
2.5V to 5.5V Supply Voltage Range
Unity-Gain Stable
Internal 1.211V ±2% Bandgap Reference
Internal Comparator Hysteresis: ±7mV(14mV)
Op Amp Capable of Driving up to 1nF Load
Operating Temperature Range:
－40℃ to 85℃
Available in SOP8 Package
Lead-free, Rohs-compliant and Halogen-free
Pin Assignment
www.consonance-elec.com
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CONSONANCE
Typical Application Circuit
Figure 1 Typical Application Circuit
Ordering Information：
Part No.
CN951
Package
Shipping
Operating Temperature Range
SOP-8 Tape and Reel, 4000/Reel
－40℃ to ＋85℃
Block Diagrams
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Figure 2 Block Diagram
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CONSONANCE
Pin Description
Pin No.
1
2
3
4
5
Symbol
AMPOUT
AMPIN-
AMPIN+
GND
COMPIN+
6 REF
7 COMPOUT
8 VCC
Description
Op Amp Output.
Inverting Op Amp Input.
Non-inverting Op Amp Input.
Negative Terminal of Power Supply or Ground.
Non-inverting Comparator Input.
Reference Voltage Output. The reference voltage is 1.211V
typical with ±2% accuracy. This pin is also connected to the
inverting input of comparator.
Comparator Output.
Positive Terminal of Power Supply.
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (With Respect to GND)
VCC..............…...…......-0.3V to +6.5V
The other Pins……..…....-0.3V to VCC
Input/Output Current
All Pins……………....................20mA
Short-Circuit Duration
REF and AMPOUT……….Continuous
COMPOUT………………………….2s
Maximum Junction Temperatures...........+150°C
Thermal Resistance…………………....200°C/W
Operating Temperature.…..….…....-40 to +85°C
Storage Temperature.......…….......-65 to +150°C
Lead Temperature (soldering, 10s) ..........+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
www.consonance-elec.com
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Rev 1.0
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