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PDF TS9001 Data sheet ( Hoja de datos )
| Número de pieza | TS9001 | |
| Descripción | 1.6V Nanopower Comparator | |
| Fabricantes | Touchstone Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TS9001 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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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 Touchstone Semiconductor’s first
analog comparator products in its “NanoWatt Analog”
high-performance analog integrated circuits portfolio.
The TS9001-1/2 draw 600nA of supply current and
include 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-push 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
NanoWatt Analog and the Touchstone Semiconductor logo are
registered trademarks of Touchstone Semiconductor, Incorporated.
www.DataSheet4U.net
Page 1
© 2011 Touchstone Semiconductor, Inc. All rights reserved.
1 page  
TS9001
Output Stage Circuitry
Many conventional analog comparators can draw
orders of magnitude higher supply current when
switching. Because of this behavior, additional
power supply bypass capacitance may be required
to provide additional charge storage during
switching. The design of the TS9001-1’s rail-to-rail
output stage implements a technique that virtually
eliminates supply-current surges when output
transitions occur. The supply-current change as a
function of output transition frequency exhibited by
these analog comparators is very small. Material
benefits of this attribute to battery-power
applications are the increase in operating time and
in reducing the size of power-supply filter capacitors.
Internal Voltage Reference
The TS9001-1/2’s internal +1.252V voltage
reference exhibits a typical temperature coefficient
of 40ppm/°C over the full -40°C to +85°C
temperature range. An equivalent circuit for the
reference section is illustrated in Figure 1. Since the
output impedance of the voltage reference Is
typically 200kΩ, its output can be bypassed with a
low-leakage capacitor and is stable for any
capacitive load.
Figure 1: TS9001’s Internal VREF Output
Equivalent Circuit
An external buffer – such as the TS1001 – can be
used to buffer the voltage reference output for higher
output current drive or to reduce reference output
impedance.
APPLICATIONS INFORMATION
Low-Voltage, Low-Power Operation
Because they were designed specifically for low-
power, battery-operated applications, the TS9001-
1/2 comparators are an excellent choice. Under
nominal conditions, approximate operating times for
this analog comparator family is illustrated in Table 1
for a number of battery types and their
corresponding charge capacities.
Internal Hysteresis
As a result of circuit noise or unintended parasitic
feedback, many analog comparators often break into
oscillation within their linear region of operation
especially when the applied differential input voltage
approaches 0V (zero volt). Externally-introduced
hysteresis is a well-established technique to
stabilizing analog comparator behavior and requires
external components. As shown in Figure 2, adding
comparator hysteresis creates two trip points: VTHR
(for the rising input voltage) and VTHF (for the falling
input voltage). The hysteresis band (VHB) is defined
as the voltage difference between the two trip points.
When a comparator’s input voltages are equal,
hysteresis effectively forces one comparator input to
move quickly past the other input, moving the input
Table 1: Battery Applications using the TS9001
BATTERY TYPE
RECHARGEABLE
VFRESH
(V)
Alkaline (2 Cells)
Nickel-Cadmium (2 Cells)
Lithium-Ion (1 Cell)
Nickel-Metal- Hydride
(2 Cells)
No
Yes
Yes
Yes
3.0
2.4
3.5
2.4
VEND-OF-LIFE (V)
1.8
1.8
2.7
1.8
CAPACITY, AA
SIZE (mA-h)
2000
750
1000
1000
TS9001/TSM9003
OPERATING TIME
(hrs)
2.5 x 106
937,500
1.25 x 106
1.25 x 106
TS9001DS r1p0
Page 5
RTFDS
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TS9001.PDF ] | |
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