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PDF ( 数据手册 , 数据表 ) TS1001

零件编号 TS1001
描述 RAIL-TO-RAIL OP AMP
制造商 Touchstone
LOGO Touchstone LOGO 


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TS1001 数据手册, 描述, 功能
TS1001
THE ONLY 0.8V/0.6µA RAIL-TO-RAIL OP AMP
FEATURES
Single 0.65V to 2.5V Operation
Supply current: 0.6μA (typ)
Offset voltage: 0.5mV (typ)
Low TCVOS: 20µV/°C (max)
AVOL Driving 100kLoad: 90dB (min)
Unity Gain Stable
Rail-to-rail Input and Output
No Output Phase Reversal
5-pin SC70 Package
APPLICATIONS
Battery/Solar-Powered Instrumentation
Portable Gas Monitors
Low-voltage Signal Processing
Nanopower Active Filters
Wireless Remote Sensors
Battery-powered Industrial Sensors
Active RFID Readers
Powerline or Battery Current Sensing
Handheld/Portable POS Terminals
DESCRIPTION
The TS1001 is the industry’s first sub-1µA supply
current, precision CMOS operational amplifier rated
to operate at a nominal supply voltage of 0.8V.
Optimized for ultra-long-life battery-powered
applications, the TS1001 is Touchstone’s first
operational amplifier in the “NanoWatt Analog™”
high-performance analog integrated circuits portfolio.
The TS1001 exhibits a typical input offset voltage of
0.5mV, a typical input bias current of 25pA, and rail-
to-rail input and output stages. The TS1001 can
operate from single-supply voltages from 0.65V to
2.5V.
The TS1001’s combined features make it an excellent
choice in applications where very low supply current
and low operating supply voltage translate into very
long equipment operating time. Applications include:
nanopower active filters, wireless remote sensors,
battery and powerline current sensors, portable gas
monitors, and handheld/portable POS terminals.
The TS1001 is fully specified at VDD = 0.8V and over
the industrial temperature range (40°C to +85°C)
and is available in a PCB-space saving 5-lead SC70
surface-mount package.
TYPICAL APPLICATION CIRCUIT
A NanoWatt 2-Pole Sallen Key Low Pass Filter
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Patent(s) Pending
NanoWatt Analog and the Touchstone Semiconductor logo are registered
trademarks of Touchstone Semiconductor, Incorporated.
30%
Supply Current Distribution
VDD = 0.8V
25%
20%
15%
10%
5%
0%
0.53 0.58 0.63 0.68 0.73
Supply Current - µA
Page 1
© 2011 Touchstone Semiconductor, Inc. All rights reserved.







TS1001 pdf, 数据表
TS1001
The circuit in Figure 1 illustrates a typical
implementation used to amplify the output of an
oxygen detector. The TS1001 makes an
excellent choice for this application as it only draws
way to achieve this objective is to use an RC filter at
the noninverting terminal of the TS1001.
If additional attenuation is needed, a two-pole
Sallen-Key filter can be used to provide the
additional attenuation as shown in Figure 3.
Figure 1: A Nanopower, Precision Oxygen Gas Sensor
Amplifier.
0.6µA of supply current and operates on supply
voltages down to 0.65V. With the components
shown in the figure, the circuit consumes less than
0.7 μA of supply current ensuring that small form-
factor single- or button-cell batteries (exhibiting low
mAh charge ratings) could last beyond the operating
life of the oxygen sensor. The precision
specifications of the TS1001, such as its low offset
voltage, low TCVOS, low input bias current, high
CMRR, and high PSRR are other factors which
make the TS1001 an excellent choice for this
application. Since oxygen sensors typically exhibit
an operating life of one to two years, an oxygen
sensor amplifier built around a TS1001 can operate
from a conventionally-available single 1.5-V alkaline
AA battery for over 290 years! At such low power
consumption from a single cell, the oxygen sensor
could be replaced over 150 times before the battery
requires replacing!
NanoWatt, Buffered Single-pole Low-Pass Filters
When receiving low-level signals, limiting the
bandwidth of the incoming signals into the system is
often required. As shown in Figure 2, the simplest
Figure 3: A Nanopower 2-Pole Sallen-Key Low-Pass Filter.
For best results, the filter’s cutoff frequency should
be 8 to 10 times lower than the TS1001’s crossover
frequency. Additional operational amplifier phase
margin shift can be avoided if the amplifier
bandwidth-to-signal bandwidth ratio is greater than
8.
The design equations for the 2-pole Sallen-Key low-
pass filter are given below with component values
selected to set a 400Hz low-pass filter cutoff
frequency:
R1 = R2 = R = 1M
C1 = C2 = C = 400pF
Q = Filter Peaking Factor = 1
f–3dB = 1/(2 x π x RC) = 400 Hz
R3 = R4/(2-1/Q); with Q = 1, R3 = R4.
A Single +1.5 V Supply, Two Op Amp
Instrumentation Amplifier
The TS1001’s ultra-low supply current and ultra-low
voltage operation make it ideal for battery-powered
applications such as the instrumentation amplifier
shown in Figure 4.
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Figure 2: A Simple, Single-pole Active Low-Pass Filter.
Page 8
Figure 4: A Two Op Amp Instrumentation Amplifier.
The circuit utilizes the classic two op amp
instrumentation amplifier topology with four resistors
TS1001DS r1p0
RTFDS














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