TS3003ITD1033T [TOUCHSTONE]
A 1.55V to 5.25V, 10kHz to 300kHz Silicon Timer; 一个1.55V至5.25V ， 10kHz至300kHz的硅定时器
| 型号： | TS3003ITD1033T |
| 厂家： | 
TOUCHSTONE SEMICONDUCTOR INC |
| 描述： | A 1.55V to 5.25V, 10kHz to 300kHz Silicon Timer |
| 文件： | 总10页 (文件大小：868K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS3003
A 1.55V to 5.25V, 10kHz to 300kHz Silicon Timer
DESCRIPTION
FEATURES
Ultra Low Supply Current: 1.9μA at 25kHz
The TS3003 is a single-supply, second-generation
Touchstone Semi oscillator/timer fully specified to
operate at a supply voltage range of 1.55V to 5.25V
while consuming less than 2.4μA(max) supply
current. Requiring only a resistor to set the base
output frequency (or output period) at 25kHz (or
Supply Voltage Operation: 1.55V to 5.25V
Single Resistor Sets FOUT at 50% Duty Cycle
Programmable FOUT Period:
10kHz ≤ FOUT ≤ 300kHz
FOUT Period Accuracy: 3%
40µs) with
a
50% duty cycle, the TS3003
FOUT Period Drift: 0.02%/ºC
Single Resistor Sets Output Frequency
Separate PWM Control and Buffered Output
FOUT/PWMOUT Output Driver Resistance:
160Ω
timer/oscillator is compact, easy-to-use, and versatile.
Optimized for ultra-long life, low frequency,
battery-powered/portable applications, TS3003 joins
the TS3001, TS3002, TS3004, and TS3006 in
Touchstone’s CMOS timer family in its “NanoWatt
Analog™” series of high-performance analog
integrated circuits.
The TS3003 output frequency can be user-adjusted
from 10kHz to 300kHz with a single resistor. In
addition, the TS3003 represents a 25% reduction in
pcb area and a factor-of-10 lower power consumption
APPLICATIONS
over
other
CMOS-based
integrated
circuit
Portable and Battery-Powered Equipment
Low-Parts-Count Nanopower Oscillator
Compact Micropower Replacement for Crystal and
Ceramic Oscillators
oscillators/timers. When compared against industry-
standard 555-timer-based products, the TS3003
offers up to 84% reduction in pcb area and over three
orders of magnitude lower power consumption.
Micropower Pulse-width Modulation Control
Micropower Pulse-position Modulation Control
Micropower Clock Generation
The TS3003 is fully specified over the -40°C to +85°C
temperature range and is available in a low-profile,
10-pin 3x3mm TDFN package with an exposed
back-side paddle.
Micropower Sequential Timing
TYPICAL APPLICATION CIRCUIT
The Touchstone Semiconductor logo and “NanoWatt Analog” are
registered trademarks of Touchstone Semiconductor, Incorporated.
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© 2013 Touchstone Semiconductor, Inc. All rights reserved.
TS3003
ABSOLUTE MAXIMUM RATINGS
VDD to GND............................................................... -0.3V to +5.5V
PWM_CNTRLto GND .............................................. -0.3V to +5.5V
FOUT, PWMOUT to GND......................................... -0.3V to +5.5V
RSET to GND........................................................... -0.3V to +2.5V
CPWM to GND......................................................... -0.3V to +5.5V
FDIV to GND ............................................................ -0.3V to +5.5V
Continuous Power Dissipation (TA = +70°C)
10-Pin TDFN (Derate at 13.48mW/°C above +70°C)... 1078mW
Operating Temperature Range................................ -40°C to +85°C
Storage Temperature Range................................. -65°C to +150°C
Lead Temperature (Soldering, 10s).....................................+300°C
Electrical and thermal 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 condition beyond those indicated in the operational sections
of the specifications is not implied. Exposure to any absolute maximum rating conditions for extended periods may affect device reliability and
lifetime.
PACKAGE/ORDERING INFORMATION
PART
MARKING
ORDER NUMBER
TS3003ITD1033TP
TS3003ITD1033T
CARRIER QUANTITY
Tape
-----
& Reel
3003I
Tape
3000
& Reel
Lead-free Program: Touchstone Semiconductor supplies only lead-free packaging.
Consult Touchstone Semiconductor for products specified with wider operating temperature ranges.
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TS3003
ELECTRICAL CHARACTERISTICS
VDD = 3V, VPWM_CNTRL= VDD, RSET = 4.32MΩ, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 0pF, CLOAD(PWM) = 0pF, CPWM = 47pF, unless otherwise
noted. Values are at TA = 25°C unless otherwise noted. See Note 1.
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
MIN
1.55
TYP
1.9
MAX
5.25
2.4
2.7
3.6
4.5
41.2
42
UNITS
V
VDD
CPWM = VDD
-40°C ≤ TA ≤ 85°C
-40°C ≤ TA ≤ 85°C
Supply Current
IDD
µA
µs
3.3
39
38
40.1
FOUT Period
tFOUT
-40°C ≤ TA ≤ 85°C
FOUT Period Line
Regulation
ΔtFOUT/V
1.55V ≤ VDD ≤ 5.25V
0.17
%/V
%
FOUT Duty cycle
49
51
FOUT Period
Temperature
Coefficient
ΔtFOUT/ΔT
0.02
41.6
%/°C
37
15
48
24
PWMOUT Duty Cycle
DC(PWMOUT)
%
%
VPWM_CNTRL= 0V
PWMOUT Duty Cycle
Line Regulation
ΔDC(PWMOUT)/V 1.55V < VDD < 5.25V, FDIV2:0 = 000
-3
930
810
150
1050
1150
250
CPWM Sourcing Current
ICPWM
nA
mV
ns
-40°C ≤ TA ≤ 85°C
UVLO Hysteresis
FOUT, PWMOUT
Rise Time
FOUT, PWMOUT
Fall Time
VUVLO
tRISE
(VDD=1.55V) – (VDD
_
)
SHUTDOWN VOLTAGE
See Note 2, CL = 15pF
10
10
tFALL
See Note 2, CL = 15pF
See Note 3
ns
FOUT Jitter
0.001
0.3
%
V
RSET Pin Voltage
V(RSET)
IFDIV
10
20
nA
FDIV Input Current
-40°C ≤ TA ≤ 85°C
Maximum Oscillator
Frequency
High Level Output
Voltage, FOUT and
PWMOUT
Fosc
RSET= 330K
IOH = 1mA
300
kHz
mV
VDD - VOH
160
Low Level Output
Voltage, FOUT and
PWMOUT
VOL
TDT
IOL = 1mA
140
106
mV
ns
Dead Time
FOUT edge falling and PWMOUT edge rising
Note 1: All devices are 100% production tested at TA = +25°C and are guaranteed by characterization for TA = TMIN to TMAX, as specified.
Note 2: Output rise and fall times are measured between the 10% and 90% of the VDD power-supply voltage levels. The specification is based
on lab bench characterization and is not tested in production.
Note 3: Timing jitter is the ratio of the peak-to-peak variation of the period to the mean of the period. The specification is based on lab bench
characterization and is not tested in production.
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TS3003
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 3V, VPWM_CNTRL= VDD, RSET = 4.32MΩ, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 0pF, CLOAD(PWM) = 0pF, CPWM = VDD, unless otherwise
noted. Values are at TA = 25°C unless otherwise noted.
FOUT Period vs Temperature
Supply Current vs FOUT Period
14
12
10
8
41
40.5
40
39.5
39
6
4
2
0
0
20
40
PERIOD - µs
Supply Current vs CLOAD(FOUT)
60
80
100
-40
-15
10
TEMPERATURE - ºC
Supply Current vs Temperature
35
60
85
2.5
2.3
2.1
1.9
8
6
4
2
0
1.7
0
10
20
30
40
-40
-15
10
TEMPERATURE - ºC
Start-up Time vs Supply Voltage
35
60
85
CLOAD- pF
FOUT Period vs Supply Voltage
40.2
40.18
40.16
40.14
11
10
9
8
7
40.12
40.1
6
5
1.55
2.29
3.03
3.77
4.51
5.25
1.55
2.29
3.03
3.77
4.51
5.25
SUPPLY VOLTAGE - Volt
SUPPLY VOLTAGE - Volt
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TS3003
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 3V, VPWM_CNTRL= VDD, RSET = 4.32MΩ, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 0pF, CLOAD(PWM) = 0pF, CPWM = VDD , unless otherwise
noted. Values are at TA = 25°C unless otherwise noted.
Supply Current Distribution
Period vs RSET
100
80
35%
30%
25%
20%
15%
60
40
10%
5%
20
0
0%
0
2
4
6
8
10
12
1.95
1.97
1.99
2.01
RSET - MΩ
SUPPLY CURRENT - µA
FOUT
FOUT
VDD = 3V, CLOAD = 15pF
VDD = 5V, CLOAD = 15pF
5µs/DIV
5µs/DIV
FOUT and PWMOUT
FOUT and PWMOUT
VDD = 3V, CLOAD = 15pF, VPWM_CNTRL= VDD, CPWM = 47pF
VDD = 5V, CLOAD = 15pF, VPWM_CNTRL= VDD, CPWM = 47pF
5µs/DIV
5µs/DIV
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TS3003
PIN FUNCTIONS
PIN
NAME
FUNCTION
Fixed Frequency Output. A push-pull output stage with an
output resistance of 160Ω. FOUT pin swings from GND to
VDD. For lowest power operation, capacitance loads should
be minimized and resistive loads should be maximized.
Non-Connect.
1
FOUT
NC
2,3,
Pulse-width Modulated Output. A push-pull output stage with
an output resistance of 160Ω, the PWMOUT pin is wired anti-
phase with respect to FOUT and swings from GND to VDD.
For lowest power operation, capacitance loads should be
minimized and resistive loads should be maximized.
PWM Output Pulse Control Pin. Applying a voltage between
GND and VRSET will reduce the duty cycle of the PWMOUT
5
PWMOUT
6
PWM_CNTRL output that is set by the capacitor connected to the CPWM
pin. Connect PWM_CNTRL to VDD for fixed PWMOUT output
pulse time (determined only by capacitor at CPWM).
Ground. Connect this pin to the system’s analog ground
plane.
4,7
GND
PWMOUT Pulse Width Programming Capacitance Input. A
target capacitance connected from this pin to GND sets the
duty cycle of the PMW output. Minimize any stray capacitance
on this pin. The voltage on this pin will swing from GND to
VRSET. Connect CPWM to VDD to disable PWM function
(saves PWM current).
Power Supply Voltage Input. The supply voltage range is
1.55V ≤ VDD ≤ 5.25V. Bypass this pin with a 0.1uF ceramic
coupling capacitor in close proximity to the TS3003.
FOUT Programming Resistor Input. A 4.32MOhm resistor
connected from this pin to ground sets the T3003’s internal
oscillator’s output period to 40µs (25KHz). For optimal
performance, the composition of the RSET resistor shall be
consistent with a tolerance of 1% or lower. The RSET pin
voltage is approximately 0.3V.
8
9
CPWM
VDD
10
RSET
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TS3003
BLOCK DIAGRAM
THEORY OF OPERATION
RSET (MΩ) FOUT (kHz)
The TS3003 is a user-programmable oscillator where
the period of the square wave at its FOUT terminal is
generated by an external resistor connected to the
RSET pin. The output frequency is given by:
1
108
43
25
16
11
2.49
4.32
6.81
9.76
1.08ꢇ11
ꢀOꢁT ꢂꢃꢄꢅꢆ ꢀ
RSꢇT
Table 1: FOUT vs RSET
Equation 1. FOUT Frequency Calculation
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TS3003
With an RSET = 4.32MΩ, the output frequency is
approximately 25kHz with a 50% duty cycle. As
design aids, Tables 1 lists TS3003’s typical ꢀOꢁT for
APPLICATIONS INFORMATION
Minimizing Power Consumption
various standard values for RSET
.
To keep the TS3003’s power consumption low,
resistive loads at the FOUT and PWMOUT terminals
increase dc power consumption and therefore should
be as large as possible. Capacitive loads at the
FOUT and PWMOUT terminals increase the
TS3003’s transient power consumption and, as well,
should be as small as possible.
The output frequency can be user-adjusted from
10kHz to 300kHz with a single resistor. The TS3003
also provides a separate PWM output signal at its
PWMOUT terminal that is anti-phase with respect to
FOUT. A dead time of approximately 106ns exists
between FOUT and PWMOUT. To adjust the pulse
width of the PWMOUT output, a single capacitor can
be placed at the CPWM pin. To determine the
capacitance needed for a desired pulse width, the
following equation is to be used:
One challenge to minimizing the TS3003’s transient
power consumption is the probe capacitance of
oscilloscopes and frequency counter instruments.
Most instruments exhibit an input capacitance of
15pF or more. Unless buffered, the increase in
transient load current can be as much as 400nA.
ꢈulse Widthꢂsꢆ x ꢉCꢈWM
CꢈWMꢂꢀꢆ=
VCꢈWMꢀꢁꢀ300mV
Equation 2. CPWM Capacitor Calculation
To minimize capacitive loading, the technique shown
in Figure 1 can be used. In this circuit, the principle of
where ICPWM and VCPWM is the current supplied and
voltage applied to the CPWM capacitor, respectively.
The pulse width is determined based on the period of
FOUT and should never be greater than the period at
FOUT. Make sure the PWM_CNTRL pin is set to at
least 400mV when calculating the pulse width of
PWMOUT. Note VCPWM is approximately 300mV,
which is the RSET voltage. Also note that ICPWM is
approximately 1µA.
Figure 1: Using an External Capacitor in Series with
The PWMOUT output pulse width can be adjusted
further after selecting a CPWM capacitor. This can be
achieved by applying a voltage to the PWM_CNTRL
pin between VRSET and GND. With a voltage of at
least VRSET, the pulse width is set based on Equation
Probes Reduces Effective Capacitive Load.
series-connected capacitors can be used to reduce
the effective capacitive load at the TS3003’s ꢀOꢁT
and PWMOUT terminals.
2. For example, with a period of
40µs( 25kHz) a
47pF capacitor at the CPWM pin generates a pulse
width of approximately 16µs. This can be calculated
using equation 2. By reducing the PWM_CNTRL
voltage from VRSET ꢁ 300mV to GND, the pulse width
is reduced from 16µs to approximately 8µs. This is a
pulse width reduction of 50%. Note that as the FOUT
frequency increases, the amount of pulse width
reduction reduces and vice versa. Furthermore, if the
PWMOUT output is half the frequency of the FOUT
output, this means your CPWM capacitor is too large
and as a result, the pulse width is greater than the
FOUT period. In this case, use Equation 2 and
reduce the capacitor value to less than the period.
Connect CPWM to VDD to disable the PWM function
and in turn, save power. Connect PWM_CNTRL to
VDD for a fixed PWMOUT output pulse width, which
is determined by the CPWM pin capacitor only.
To determine the optimal value for CEXT once the
probe capacitance is known by simply solving for
CEXT using the following expression:
1
CꢇꢊTꢀ=ꢀ
1
ꢀ1
ꢀꢍꢀ
CꢋOAꢌꢂꢇꢀꢀꢆ CꢈROꢎꢇ
Equation 3:External Capacitor Calculation
ꢀor example, if the instrument’s input probe
capacitance is 15pF and the desired effective load
capacitance at either or both FOUT and PWMOUT
terminals is to be ≤5pꢀ, then the value of CEXT should
be ≤7.5pꢀ.
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TS3003
TS3003 Start-up Time
Using the TS3003 and a Potentiometer to Dim an
LED
As the TS3003 is powered up, its FOUT terminal
(and PWMOUT terminal, if enabled) is active once
the applied VDD is higher than 1.55V. Once the
applied VDD is higher than 1.55V, the master
oscillator achieves steady-state operation within 8ms.
The TS3003 can be configured to dim an LED by
modulating the pulse width of the PWMOUT output.
With an RSET= 2MΩ, the ꢀOꢁT output frequency is
approximately 51kHz (or 19.5µs period). Refer to
Figure 3. The CPWM capacitor was calculated using
Equation 2 with a pulse width of 15µs. To reduce the
pulse width from 15µs and in turn, dim the LED, a
1MΩ potentiometer is used. The potentiometer is
connected to the PWM_CNTRL pin in a voltage
divider configuration. The supply voltage of the circuit
is 5V.
Divide the PWMOUT Output Frequency by Two
with the TS3003
Using a single resistor and capacitor, the TS3003 can
be configured to a divide by two circuit as shown in
Figure 2. To achieve a divide by two function with the
TS3003, the pulse width of the PWMOUT output
must be at least a factor of 2 greater than the period
set at FOUT by resistor RSET. The CPWM capacitor
selected must meet this pulse width requirement and
can be calculated using Equation 2. In Figure 3, a
value of 4.32MΩ for RSꢇT sets the ꢀOꢁT output
period to 40µs. A CPWM capacitor of 265pF was
chosen, which sets the pulse width of PWMOUT to
approximately 80µs. This is well above the required
minimum pulse width of 40µs.
.
Figure 3: TS3003 Configured to Dim an LED with a
Potentiometer
Figure 2: Configuring the TS3003 into a Divide by
Two Frequency Divider
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TS3003
PACKAGE OUTLINE DRAWING
10-Pin TDFN33 Package Outline Drawing
(N.B., Drawings are not to scale)
3.00±0.05
Dap Size
2.65X1.90 mm
0.25±0.05
CO.35
2.30±0.10
Pin 1 DOT BY
MARKING
3.00±0.05
0.50 BSC
1.60±0.10
0.40±0.05
0.30Ref
TOP VIEW
BOTTOM VIEW
NOTE!
All dimensions in mm.
Compliant with JEDEC MO-229
0.75±0.05
0.00±0.05
SIDE VIEW
Information furnished by Touchstone Semiconductor is believed to be accurate and reliable. However, Touchstone Semiconductor does not
assume any responsibility for its use nor for any infringements of patents or other rights of third parties that may result from its use, and all
information provided by Touchstone Semiconductor and its suppliers is provided on an AS IS basis, WITHOUT WARRANTY OF ANY KIND.
Touchstone Semiconductor reserves the right to change product specifications and product descriptions at any time without any advance
notice. No license is granted by implication or otherwise under any patent or patent rights of Touchstone Semiconductor. Touchstone
Semiconductor assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using Touchstone Semiconductor components. To minimize the risk associated with customer products and applications,
customers should provide adequate design and operating safeguards. Trademarks and registered trademarks are the property of their
respective owners.
Touchstone Semiconductor, Inc.
Page 10
630 Alder Drive, Milpitas, CA 95035
+1 (408) 215 - 1220 ▪ www.touchstonesemi.com
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