TS3002 TOUCHSTONE | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 11
Technical content
© 2012 Touchstone Semiconductor, Inc. All rights reserved.
FEATURES
Ultra Low Supply Current: 1µA at 25kHz Supply Voltage Operation: 0.9V to 1.8V Programmable Frequency Range: o 5.2kHz ≤ FOUT ≤ 90kHz (BOOST = GND) o 5.2kHz ≤ FOUT ≤ 290kHz (BOOST = VDD) FOUT Period Drift: 0.044%/°C PWMOUT Duty Cycle Range: 12% to 90% Single Resistor and Capacitor Set Output Frequency Output Driver Resistance: 160Ω
APPLICATIONS
Portable and Battery-Powered Equipment Low-Parts-Count Nanopower Oscillator Compact Nanopower Replacement for Crystal and Ceramic Oscillators Nanopower Pulse-width Modulation Control Nanopower Pulse-position Modulation Control Nanopower Clock Generation Nanopower Sequential Timing
DESCRIPTION
The TS3002 is the industry’s first and onl y single - supply CMOS oscillator fully specified to operate at 1V while consuming a 1µA supply current at an output frequency of 25kHz. This oscillator is compact, easy-to-use, and versatile. Optimized for ultra -long life, battery -powered applications, the TS3002 is Touchstone’s first oscillator in the “NanoWatt Analog™” high -performance analog integrated circuits portfolio. The TS3002 can operate from single-supply voltages from 0.9V to 1.8V. Requiring only a resistor and a capacitor to set the output frequency, the TS3002 represent s a 66% reduction in pcb area and a factor -of-10 reduction in power consumption over other CMOS -based integrated circuit oscil lators. When compared against industry-standard 555 -timer-based products, the TS3002 offer s up to 93% reduction in pcb area and four orders of magnitude lower power consumption. The TS3002 is fully specified over the -40°C to +85°C temperature range and is available in a low-profile, 8- pin 2x2mm TDFN package with an exposed back - side paddle. A 1V/1µA Easy-to-Use Silicon Oscillator/Timer TYPICAL APPLICATION CIRCUIT Supply Current - µA Percent of Units - % Supply Current Distribution 0.97 10% 15% 20% 25% 30% 35% 0.99 1.01 1.03 The Touchstone Semiconductor logo is a registered trademark of Touchstone Semiconductor, Incorporated.
Short Circuit Duration FOUT, PWMOUT to GND or VDD Continuous Power Dissipation (TA = +70°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 ORDER NUMBER PART MARKING CARRIER QUANTITY TS3002ITD822TP AAH Tape & Reel ----- TS3002ITD822T Tape & Reel 3000 Lead-free Program: Touchstone Semiconductor supplies only lead-free packaging. Consult Touchstone Semiconductor for products specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
VDD = 1V, VCNTRL = VDD, VBOOST = 0V, RSET = 4.32MΩ, CSET = 7.9pF, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 0pF, CLOAD(PWM) = 0pF unless otherwise noted. Values are at TA = 25°C unless otherwise noted. See Note 1. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage VDD 0.9 1 1.8 V Supply Current IDD 1 1.5 µA VCNTRL = 0.15 x VDD 2.1 3.7 VBOOST = VDD 2.16 3.2 VBOOST = VDD, VCNTRL = 0.15 x VDD 3.6 5.3 FOUT Period tFOUT 37 40.6 44 µs -40°C ≤ TA ≤ 85°C 34.7 45.6 VBOOST = VDD 36 39.5 43 -40°C ≤ TA ≤ 85°C 33 48 FOUT Period Line Regulation ΔtFOUT/V 1V ≤ VDD ≤ 1.8V 1.3 %/V VBOOST = VDD -1.6 FOUT Period Temperature Coefficient ΔtFOUT/ΔT 0.044 %/°C VBOOST = VDD 0.086 PWMOUT Duty Cycle DC(PWMOUT) VCNTRL = 0.03 x VDD 4.5 8.9 13 VCNTRL = 0.15 x VDD 44 49.3 54 VCNTRL = 0.27 x VDD 83 90.5 97 VCNTRL = 0.03 x VDD VBOOST = VDD 4.5 8.5 12.5 VCNTRL = 0.15 x VDD 47 50.4 54 VCNTRL = 0.27 x VDD 86 91.2 96 FOUT, PWMOUT Rise Time tRISE See Note 2, CL = 15pF 8.6 ns FOUT, PWMOUT Fall Time tFALL See Note 2, CL = 15pF 7.9 ns FOUT Jitter See Note 3 0.08 % RSET Pin Voltage V(RSET) 0.3 V CNTRL Output Current ICNTRL 25 45 nA -40°C ≤ TA ≤ 85°C 80 PWMOUT Enable VPWM_EN (VDD - VCNTRL ), 0.9V < VDD < 1.8V 375 mV PWMOUT Disable VPWM_DIS (VDD - VCNTRL ), 0.9V < VDD < 1.8V 131 mV BOOST Enable VIH (VDD – VBOOST ), 0.9V < VDD < 1.8V 77 mV BOOST Disable VIL 0.9V < VDD < 1.8V 77 mV BOOST Input Current IBOOST 10 nA High Level Output Voltage, FOUT and PWMOUT VDD - VOH IOH = 1mA 160 mV Low-level Output Voltage, FOUT and PWMOUT VOL IOL = 1mA 140 mV 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.
TYPICAL PERFORMANCE CHARACTERISTICS VDD = 1V, VCNTRL = VDD, VBOOST = 0V, RSET = 4.32MΩ, CSET = 7.9pF, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 5pF, unless otherwise noted. Values are at TA = 25°C unless otherwise noted. PERIOD - µs SUPPLY CURRENT - µA 40 80 1.5 0.5 Supply Current vs FOUT Period 0 120 2.5 160 200 PERIOD - µs SUPPLY CURRENT - µA 4.3 1.5 8.5 Supply Current vs FOUT Period 5.7 7.1 2.9 CLOAD- pF SUPPLY CURRENT - µA 10 20 2.4 Supply Current vs CLOAD(FOUT) 0 30 2.6 2.8 2.2 3.2 SUPPLY VOLTAGE - Volt PERIOD - µs 1.05 1.2 40.6 40.4
41.2 FOUT Period vs Supply Voltage
0.9 1.35 40.8 1.5 40 80 0 120 160 200 CLOAD- pF SUPPLY CURRENT - µA 10 20 1.2 0.8 1.8 Supply Current vs CLOAD(FOUT) 0 30 1.4 1.6 1.65 1.8 SUPPLY VOLTAGE - Volt PERIOD - µs 1.05 1.2 38.8 39.6 FOUT Period vs Supply Voltage 0.9 1.35 39.2 39.4 1.5 1.65 1.8 39.8 BOOST = VDD BOOST = VDD BOOST = VDD BOOST = GND BOOST = GND BOOST = GND
TYPICAL PERFORMANCE CHARACTERISTICS VDD = 1V, VCNTRL = VDD, VBOOST = 0V, RSET = 4.32MΩ, CSET = 7.9pF, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 5pF, unless otherwise noted. Values are at TA = 25°C unless otherwise noted. TEMPERATURE - ºC PERIOD - µs -15 10 40.5 39.5 FOUT Period vs Temperature -40 35 41.5 60 85 SUPPLY VOLTAGE - Volt START-UP TIME - ms 1.2 1.24 1.1 1.66 Start-up Time vs Supply Voltage 0.9 1.38 1.52 1.5 TEMPERATURE - ºC SUPPLY CURRENT - µA 1.08 0.8 Supply Current vs Temperature 1.22 1.36 0.94 1.5 1.8 42.5 TEMPERATURE - ºC PERIOD - µs -15 10 FOUT Period vs Temperature -40 35 39.5 38.5 60 85 40.5 41.5 -15 10 -40 35 60 85 TEMPERATURE - ºC SUPPLY CURRENT - µA 2.24 1.6 Supply Current vs Temperature 2.56 2.88 1.92 3.2 -15 10 -40 35 60 85 1.8 RSET - MΩ PERIOD - µs 4 8 200 Period vs RSET 0 12 120 160 16 20 BOOST = VDD BOOST = VDD BOOST = GND BOOST = GND BOOST = GND
TYPICAL PERFORMANCE CHARACTERISTICS VDD = 1V, VCNTRL = VDD, VBOOST = 0V, RSET = 4.32MΩ, CSET = 7.9pF, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 5pF, unless otherwise noted. Values are at TA = 25°C unless otherwise noted. RSET - MΩ PERIOD - µs 4 8 200 Period vs RSET 0 12 120 160 16 20 CSET - pF PERIOD - µs 8 12 Period vs CSET 100 16 20 CSET - pF PERIOD - µs 8 12 Period vs CSET 100 16 20 0 FOUT and PWMOUT Transient Response VDD = 1V, VCNTRL = 0.035 x VDD, BOOST = VDD, CLOAD = 22pF 5µs/DIV FOUT FOUT Transient Response VDD = 1V, BOOST = VDD, CLOAD = 47pF 5µs/DIV FOUT FOUT Transient Response VDD = 1.5V, BOOST = VDD, CLOAD = 47pF 5µs/DIV FOUT BOOST = VDD BOOST = VDD PWMOUT BOOST = GND
1 FOUT
Fixed Frequency Output. A push-pull output stage with an output resistance of 160Ω, the FOUT pin swings from GND to VDD. For lowest power operation, capacitive loads should be minimized and resistive loads should be maximized.
2 BOOST
BOOST Input. A digital switch input, BOOST controls the propagation delay of the primary timing comparator in the TS3002’s master oscillator subcircuit. Connecting the BOOST pin to GND sets the maximum programmable oscillator frequency to ~90kHz.Connecting the BOOST pin to VDD reduces the comparator’s propagation delay and increases the maximum programmable master oscillator’s frequency to 290kHz.
3 PWMOUT
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, capacitive loads should be minimized and resistive loads should be maximized.
4 CNTRL
PWMOUT Enable and Duty Cycle Control Input. An analog input pin, the VCNTRL pin voltage enables the TS3002’s PWM engine and controls the duty cycle at PWMOUT from 12% (VCNTRL = 0.03 x VDD) to 90% (VCNTRL = 0.27 x VDD). Enabling the PWM engine increases the TS3002’s nominal operating supply current. To disable the TS3002’s PWM engine, CNTRL shall be connected to VDD.
5 CSET
FOUT Programming Capacitor Input. A 7.9pF capacitor connected from this pin to GND in junction with a 4.32MΩ resistor at the RSET pin sets the TS3002’s internal oscillator’s output period to ~40µs (25kHz). The maximum capacitance value is 22pF. 6 GND Ground – Connect this pin to the system’s analog ground plane.
7 RSET
FOUT Programming Resistor Input. A 4.32MΩ resistor connected from this pin to GND sets the TS3002’s internal oscillator’s output period to 40μs (25kHz). For optimal performance, the composition of the RSET resistor shall be consistent with tolerances of 1% or lower. The RSET pin voltage is 0.3V at a 1V supply.
8 VDD
Power Supply Voltage Input. While the TS3002 is fully specified at 1V, the supply voltage range is 0.9V ≤ VDD ≤ 1.8V. It is always considered good engineering practice to bypass the VDD pin with a 0.1μF ceramic decoupling capacitor in close proximity to the TS3002. EP ----- Exposed paddle is electrically connected to GND.
The TS3002 is a user-programmable oscillator where the period of the square wave at its FOUT terminal is generated by an external resistor and capacitor pair. The output frequency is given by: FOUT (kHz) = 1 tFOUT ( s) 1E k RSET MΩ x CSET(pF) where th e scalar k is approximately 1.1 9. With an RSET = 4.32M Ω and a C SET = 7.9 pF, the output frequency is approximately 25kHz with a 50% duty cycle. As design aids, Tables 1 lists TS3002’s typical FOUT for various standard values for R SET with CSET = 7.9pF and Table 2 lists typical FOUT for various standard values for CSET with RSET = 4.32MΩ. The TS3002 also provides a separate PWM output signal at its PWMOUT terminal that is anti-phase with respect to FOUT. In addition, applying a voltage at Table 1: FOUT vs RSET, CSET = 7.9pF RSET (MΩ) FOUT (kHz) 1 106 2.49 43 4.32 25 6.81 16 9.76 11 Table 2: FOUT vs CSET, RSET = 4.32MΩ CSET (pF) FOUT (kHz) 5 39 7.9 25 10 19 15 13 20 10
Touchstone Semiconductor, Inc. Page 11
630 Alder Drive, Milpitas, CA 95035 TS3002DS r1p0
+1 (408) 215 - 1220 ▪ www.touchstonesemi.com RTFDS PACKAGE OUTLINE DRAWING 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 KIN D. Touchstone Semiconductor reserves the right to change product specificati ons 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 applicatio ns, customers should provide adequate design and opera ting safeguards. Trademarks and registered trademarks are the property of their respective owners. BOTTOM VIEW SIDE VIEW NOTE: All dimensions are in mm. Compliant with JEDEC MO-229 8-Pin TDFN22 Package Outline Drawing (N.B., Drawings are not to scale)