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PDF TC911A Data sheet ( Hoja de datos )
| Número de pieza | TC911A | |
| Descripción | Monolithic Auto-Zeroed Operational Amplifers | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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TC911A
TC911B
Monolithic Auto-Zeroed Operational Amplifers
FEATURES
s First Monolithic Chopper-Stabilized Amplifier
With On-Chip Nulling Capacitors
s Offset Voltage .................................................... 5µV
s Offset Voltage Drift .................................. 0.05µV/°C
s Low Supply Current ...................................... 350µA
s High Common-Mode Rejection .................... 116dB
s Single Supply Operation ....................... 4.5V to 16V
s High Slew Rate ......................................... 2.5V/µsec
s Wide Bandwidth ............................................ 1.5MHz
s High Open-Loop Voltage Gain
(RL = 10kΩ) ..................................................... 120dB
s Low Input Voltage Noise
(0.1Hz to 1Hz) ............................................ 0.65µVP-P
s Pin Compatible With ICL7650
s Lower System Parts Count
ORDERING INFORMATION
Part No.
TC911ACOA
TC911ACPA
TC911BCOA
TC911BCPA
Temperature
Package
Range
8-Pin SOIC
8-Pin
Plastic DIP
8-Pin SOIC
8-Pin
Plastic DIP
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Maximum
Offset
Voltage
15µV
15µV
30µV
30µV
GENERAL DESCRIPTION
The TC911 CMOS auto-zeroed operational amplifier
is the first complete monolithic chopper-stabilized ampli-
fier. Chopper operational amplifiers like the ICL7650/7652
and LTC1052 require user-supplied, external offset com-
pensation storage capacitors. External capacitors are
not required with the TC911. Just as easy to use as the
conventional OP07 type amplifier, the TC911 significantly
reduces offset voltage errors. Pinout matches the OP07/
741/7650 8-pin mini-DIP configuration.
Several system benefits arise by eliminating the exter-
nal chopper capacitors: lower system parts count, reduced
assembly time and cost, greater system reliability, reduced
PC board layout effort and greater board area utilization.
Space savings can be significant in multiple-amplifier de-
signs.
Electrical specifications include 15µV maximum offset
voltage, 0.15µV/°C maximum offset voltage temperature
coefficient. Offset voltage error is five times lower than the
premium OP07E bipolar device. The TC911 improves off-
set drift performance by eight times.
The TC911 operates from dual or single power sup-
plies. Supply current is typically 350µA. Single 4.5V to 16V
supply operation is possible, making single 9V battery
operation possible. The TC911 is available in 2 package
types: 8-pin plastic DIP and SOIC.
PIN CONFIGURATION (SOIC and DIP)
NC 1
8 NC
– INPUT 2
+ INPUT 3
VSS 4
TC911ACPA
TC911BCPA
7 VDD
6 OUTPUT
5 NC
NC 1
– INPUT 2
+ INPUT 3
VSS 4
8 NC
TC911ACOA 7 VDD
TC911BCOA 6 OUTPUT
5 NC
FUNCTIONAL BLOCK DIAGRAM
NC = NO INTERNAL CONNECTION
VDD
VSS
–INPUT
2
47
VOS CORRECTION AMPLIFIER
+
A
–
B
*B
INTERNAL
OSCILLATOR
(fOSC ≈ 200 Hz)
+INPUT
3
A
*
+
– MAIN
AMPLIFIER
TC911
LOW IMPEDANCE
+ OUTPUT BUFFER
–
6
OUTPUT
© 2001 Microchip Technology Inc. DS21481A
*NOTE: Internal capacitors. No external capacitors required.
TC911/A/B-7 9/11/96
1 page  
Monolithic Auto-Zeroed Operational Amplifers
TC911A
TC911B
TYPICAL APPLICATIONS
10-Volt Precision Reference
18 kΩ
+15V
TC911
3+ 7
2–
4
6
6.4V
0.1 µF
3.6 kΩ
VOUT = 10V
Thermometer Circuit
+9V
TEMP
OUT
REF02
ADJ
TC911
R2
VREF
R1
–
+
R3
VOUT
6.4 kΩ
[ ( )] [ ]VOUT = VTEMP
1 + R2
R3 + R1
R3X R1
–
VREF
R2
R1
[ ( )]d VOUT =
dT
1 + R2
R +R
31
R3X R1
d (VTEMP) ≈K (2.1 mV/°C)
dT
K = 1 + R2
R3X R1
Programmable Gain Amplifier With Input Multiplexer
+5V –5V
GND
+5V –5V
IN1
IN2 IC1b
IN3
IN4 A1 A2 A3 A4WR
INPUT
CHANNEL
SELECT
IC1b
+
–
+5V –5V
TC911
VOUT
X 1 X 10
X 100 X1000
18 k Ω 99 k Ω 999 kΩ
68HC11
GAIN
SELECT
WR LATCH
A1 A2 A3 A4
GND
2 kΩ
1 kΩ
1 kΩ
IC1a, b, = Quad Analog Switch
© 2001 Microchip Technology Inc. DS21481A
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet TC911A.PDF ] | |
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