Datenblatt-pdf.com


TS9001 Schematic ( PDF Datasheet ) - Silicon Laboratories

Teilenummer TS9001
Beschreibung 1.6V Nanopower Comparator
Hersteller Silicon Laboratories
Logo Silicon Laboratories Logo 




Gesamt 14 Seiten
TS9001 Datasheet, Funktion
TS9001
1.6V Nanopower Comparator with Internal Reference
FEATURES
♦ Improved Electrical Performance
over MAX9117-MAX9118
♦ Guaranteed to Operate Down to +1.6V
♦ Ultra-Low Supply Current: 600nA
♦ Internal 1.252V ±1% Reference
♦ Input Voltage Range Extends 200mV Outside-
the-Rails
♦ No Phase Reversal for Overdriven Inputs
♦ Output Stage: Push-pull (TS9001-1)
Open-Drain (TS9001-2)
♦ Crowbar-Current-Free Switching
♦ Internal Hysteresis for Clean Switching
♦ 5-pin SC70 Packaging
APPLICATIONS
2-Cell Battery Monitoring/Management
Medical Instruments
Threshold Detectors/Discriminators
Sensing at Ground or Supply Line
Ultra-Low-Power Systems
Mobile Communications
Telemetry and Remote Systems
DESCRIPTION
The nanopower TS9001-1/2 analog comparators
guarantee +1.6V operation, draw very little supply
current, and have robust input stages that can
tolerate input voltages beyond the power supply. Both
products are the first analog comparator products in
the “NanoWatt Analog” high-performance analog
integrated circuits portfolio. The TS9001-1/2 draws
600nA of supply current and includes an on-board
+1.252V±1% reference. These comparators are also
electrically and form-factor identical to the MAX9117
and the MAX9118 family of analog comparators. Both
comparators offer a 33% improvement in voltage
reference initial accuracy and the TS9001-1 offers
73% higher output current drive.
The TS9001-1’s push-pull output drivers were
designed to drive 5mA loads from one supply rail to
the other supply rail. The TS9001-2’s open-drain
output stage make it easy to incorporate this analog
comparator into systems that operate on different
supply voltages. Both devices are available in an
ultra-small 5-pin SC70 package.
TYPICAL APPLICATION CIRCUIT
PART
TS9001-1
TS9001-2
INTERNAL
REFERENCE
Yes
Yes
OUTPUT
STAGE
Push-Pull
Open-Drain
IN-
Connection
REF
REF
SUPPLY
CURRENT (nA)
600
600
Page 1
© 2014 Silicon Laboratories, Inc. All rights reserved.






TS9001 Datasheet, Funktion
TS9001
TYPICAL PERFORMANCE CHARACTERISTICS
VCC = +5V; VEE = 0V; CL = 15pF; VOVERDRIVE = 100mV; TA = +25°C, unless otherwise noted.
Reference Voltage vs Supply Voltage
1.254
Reference Voltage vs Reference Source Current
1.260
1.258
1.253
1.252
46
1.256
1.254
1.252
1.250
VCC =+1.8V
1.251
1.248
1.246
VCC =+3V, 5V
1.250
1.244
1.242
1.249
1.5 2.5 3.5 4.5 5.5
1.240
0 2 4 6 8 10
SUPPLY VOLTAGE - Volt
SOURCE CURRENT- nA
1.260
1.258
1.256
1.254
1.252
1.250
1.248
1.246
1.244
1.242
1.240
0
Reference Voltage
vs Reference Sink Current
VCC =+1.8V
VCC =+3V, 5V
2468
SINK CURRENT- nA
10
Propagation Delay (tPD-) vs Temperature
28
26
24
22 VCC =+5V
20 VCC =+3V
18
16
14
12
10 VCC =+1.8V
8
6
-40 -15 10 35 60 85
TEMPERATURE - °C
TS9001-1 Propagation Delay (tPD+) vs Temperature
70
60 VCC =+5V
50 VCC =+3V
40
30
VCC =+1.8V
20
10
0
-40
-15 10 35 60
TEMPERATURE - °C
85
Page 6
Propagation Delay (tPD-) vs Capacitive Load
200
180
160
140
120
100
80
60
40
20
0
0.01
VCC =+5V
VCC =+3V
VCC =+1.8V
0.1 1
10 100 1000
CAPACITIVE LOAD - nF
TS9001 Rev. 1.0

6 Page









TS9001 pdf, datenblatt
TS9001
out of the region where oscillation occurs. Figure 2
illustrates the case in which an IN- input is a fixed
voltage and an IN+ is varied. If the input signals
were reversed, the figure would be the same with an
inverted output. To save cost and external pcb area,
an internal 4mV hysteresis circuit was added to the
TS9001-1/2.
Figure 2: TS9001 Threshold Hysteresis Band
Adding Hysteresis to the TS9001-1 Push-pull
Output Option
The TS9001-1 exhibits an internal hysteresis band
(VHYSB) of 4mV. Additional hysteresis can be
Figure 3: Using Three Resistors Introduces
Additional Hysteresis in the TS9001-1.
generated with three external resistors using positive
feedback as shown in Figure 3. Unfortunately, this
method also reduces the hysteresis response time.
The procedure to calculate the resistor values for the
TS9001-1 is as follows:
1) Setting R2. As the leakage current at the IN
pin is less than 2nA, the current through R2
should be at least 0.2μA to minimize offset
voltage errors caused by the input leakage
current. The current through R2 at the trip
Page 12
point is (VREF - VOUT)/R2.
In solving for R2, there are two formulas –
one each for the two possible output states:
R2 = VREF/IR2
or
R2 = (VCC - VREF)/IR2
From the results of the two formulae, the
smaller of the two resulting resistor values is
chosen. For example, when using the
TS9001-1 (VREF = 1.252V) at a VCC = 3.3V
and if IR2 = 0.2μA is chosen, then the
formulae above produce two resistor values:
6.26MΩ and 10.24MΩ - the 6.2MΩ standard
value for R2 is selected.
2) Next, the desired hysteresis band (VHYSB) is
set. In this example, VHYSB is set to 100mV.
3) Resistor R1 is calculated according to the
following equation:
R1 = R2 x (VHYSB/VCC)
and substituting the values selected in 1)
and 2) above yields:
R1 = 6.2MΩ x (100mV/3.3V) = 187.88kΩ.
The 187kΩ standard value for R1 is chosen.
4) The trip point for VIN rising (VTHR) is chosen
such that VTHR > VREF x (R1 + R2)/R2 (VTHF
is the trip point for VIN falling). This is the
threshold voltage at which the comparator
switches its output from low to high as VIN
rises above the trip point. In this example,
VTHR is set to 3V.
5) With the VTHR from Step 4 above, resistor R3
is then computed as follows:
R3 = 1/[VTHR/(VREF x R1) - (1/R1) - (1/R2)]
R3 = 1/[3V/(1.252V x 187kΩ)
- (1/187kΩ) - (1/6.2MΩ)] = 136.9kΩ
In this example, a 137kΩ, 1% standard
value resistor is selected for R3..
TS9001 Rev. 1.0

12 Page





SeitenGesamt 14 Seiten
PDF Download[ TS9001 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
TS9001300mA CMOS Low Dropout Voltage RegulatorTaiwan Semiconductor Company
Taiwan Semiconductor Company
TS90011.6V Nanopower ComparatorTouchstone Semiconductor
Touchstone Semiconductor
TS90011.6V Nanopower ComparatorSilicon Laboratories
Silicon Laboratories
TS9002300mA CMOS LDOTaiwan Semiconductor Company
Taiwan Semiconductor Company
TS9004300mA CMOS LDO Adjustable VoltageTaiwan Semiconductor
Taiwan Semiconductor

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche