TS3006 TOUCHSTONE | Alldatasheet
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© 2013 Touchstone Semiconductor, Inc. All rights reserved.
FEATURES
Ultra Low Supply Current: 1.9μA at 25kHz Supply Voltage Operation: 1.55V to 5.25V Single Resistor Sets FOUT at 50% Duty Cycle FOUT Period: 9kHz ≤ FOUT ≤ 300kHz Single Resistor Sets Output Frequency FOUT Period Accuracy: 3% FOUT Period Drift: 0.02%/ºC FOUT Output Driver Resistance: 160Ω
APPLICATIONS
Portable and Battery-Powered Equipment Low-Parts-Count Nanopower Oscillator Compact Micropower Replacement for Crystal and Ceramic Oscillators Micropower Pulse-width Modulation Control Micropower Pulse-position Modulation Control Micropower Clock Generation Micropower Sequential Timing
DESCRIPTION
The TS3006 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 2.4 μA(max) supply current. Requiring only a resistor to set the base output fr equency (or output period) at 25k Hz (or 40µs) w ith a 50% duty cycle, the TS3006 timer/oscillator is compact, easy-to-use, and versatile. Optimized for ultra -long life, low frequency, battery-powered/portable applications, TS3006 joins the TS 3001, TS3002, TS3004, and TS3005 in Touchstone’s CMOS timer family in its “NanoWatt Analog™” series of high -performance analog integrated circuits. The TS3006 output frequency can be user -adjusted from 9kHz to 300kHz with a single resistor . In addition, the TS3006 represents a 25% reduction in pcb area and a factor-of-10 lower power consumption over other CMOS -based integrated circuit oscillators/timers. When compared against industry - standard 555 -timer-based products, the TS3006 offers up to 84% reduction in pcb a rea and over three orders of magnitude lower power consumption. The TS3006 is fully specified over the -40°C to +85°C temperature range and i s available in a low -profile, 8-pin 3x3mm TDFN package with an exposed back- side paddle. A 1.55V to 5.25V, 1.9µA, 9kHz to 300kHz Silicon Timer TYPICAL APPLICATION CIRCUIT The Touchstone Semiconductor logo and “NanoWatt Analog” are registered trademarks of Touchstone Semiconductor, Incorporated.
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 TS3006ITD833TP 3006I Tape & Reel ----- TS3006ITD833T 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 = 3V, VPWM_CNTRL= VDD, RSET = 4.32MΩ, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 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 1.55 5.25 V Supply Current IDD 1.9 2.4 µA FOUT Period tFOUT 39 40.1 41.2 µs -40°C ≤ TA ≤ 85°C 38 42 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 %/°C UVLO Hysteresis VUVLO (VDD=1.55V) – (VDD_SHUTDOWN VOLTAGE) 150 250 mV FOUT Rise Time tRISE See Note 2, CL = 15pF 10 ns FOUT Fall Time tFALL See Note 2, CL = 15pF 10 ns FOUT Jitter See Note 3 0.001 % RSET Pin Voltage V(RSET) 0.3 V Maximum Oscillator Frequency Fosc RSET= 360K 300 kHz High Level Output Voltage, FOUT VDD - VOH IOH = 1mA 160 mV Low Level Output Voltage, FOUT 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.
PERIOD - µs SUPPLY CURRENT - µA 20 40 Supply Current vs FOUT Period 0 60 80 100 SUPPLY VOLTAGE - Volt PERIOD - µs 2.29 3.03 40.12 40.1 40.18 FOUT Period vs Supply Voltage 1.55 3.77 40.14 40.16 4.51 CLOAD- pF SUPPLY CURRENT - µA 10 20 Supply Current vs CLOAD(FOUT) 0 30 5.25 TEMPERATURE - ºC SUPPLY CURRENT - µA 2.1 1.7 Supply Current vs Temperature 2.3 2.5 1.9 -15 10 -40 35 60 85 SUPPLY VOLTAGE - Volt START-UP TIME - ms Start-up Time vs Supply Voltage TEMPERATURE - ºC PERIOD - µs -15 10 39.5 FOUT Period vs Temperature -40 35 60 85 40.5 TYPICAL PERFORMANCE CHARACTERISTICS VDD = 3V, VPWM_CNTRL= VDD, RSET = 4.32MΩ, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 0pF unless otherwise noted. Values are at TA = 25°C unless otherwise noted. 40.2
TYPICAL PERFORMANCE CHARACTERISTICS VDD = 3V, VPWM_CNTRL= VDD, RSET = 4.32MΩ, RLOAD(FOUT) = Open Circuit, CLOAD(FOUT) = 0pF unless otherwise noted. Values are at TA = 25°C unless otherwise noted. RSET - MΩ PERIOD - µs 2 4 100 Period vs RSET 0 6 8 10 PERCENT OF UNITS - % SUPPLY CURRENT - µA Supply Current Distribution 1.95 10% 15% 20% 25% 30% 35% 1.97 1.99 2.01 FOUT VDD = 3V, CLOAD = 15pF 5µs/DIV FOUT VDD = 5V, CLOAD = 15pF 5µs/DIV FOUT 1V/DIV FOUT 1V/DIV 120
1 FOUT
Fixed Frequency Output. A push -pull output stage with an output resistance of 160 Ω. FOUT pin swings from GND to VDD. For lowest power operation, capacitance loads should be minimized and resistive loads should be maximized. 2 NC Non-Connect. 3,4,5,6 GND Ground. Connect this pin to the system’s analog ground plane.
7 VDD
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 TS3006.
8 RSET
FOUT Programming Resistor Input. A 4.32MOhm resistor connected from this pin to ground sets the T3003’s internal oscillator’s output period to 40 µs (25KHz). F or 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. BLOCK DIAGRAM
The TS3006 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: O T 1.0 11 RS T Equation 1. FOUT Frequency Calculation With an RSET = 4.32M Ω, the output frequency is approximately 25kHz with a 50% duty cycle. As design aids, Tables 1 lists TS3006’s typical O T for various standard values for RSET. 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. APPLICATIONS INFORMATION Minimizing Power Consumption To keep the TS3006’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 an d PWMO UT terminals increase the TS3006’s transient power consumption and, as well, should be as small as possible. One ch allenge to minimizing the TS3006’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. To minimize capacitive loading, the technique shown in Figure 1 can be used. In this circuit, the principle of series-connected capacitors can be used to reduce the effecti ve capacitive load at the TS3006’s O T and PWMOUT terminals. To determine the optimal value for C EXT once the probe capacitance is known by simply solving for CEXT using the following expression: 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 ≤5p , then the value of C EXT should be ≤7.5p . TS3006 Start-up Time As the TS3006 is powered up, its FOUT terminal (and PWMOUT terminal, if enabled) is active on ce the applied VDD is higher than 1.55 V. Once the applied VDD is higher than 1.55V, the master oscillator achieves steady-state operation within 8ms. RSET (MΩ) FOUT (kHz) 0.360 300 1 108 2.49 43.37 4.32 25 6.81 15.86 9.76 11.07 12 9 Table 1: FOUT vs RSET C T = 1 C OAD C RO Equation 2: External Capacitor Calculation Figure 1: Using an External Capacitor in Series with Probes Reduces Effective Capacitive Load.
Using a Potentiometer to Trim the TS3006’s Output Frequency By using a fixed resistor and a potentiometer, the output frequency of the TS3006 can be trimmed as shown in Figure 2. By selecting a fixed resistor R1 with a tolerance of 0.1% and a potentiometer P1 with a 5% tolerance, the output frequency can be trimmed to provide a ±2% trimming range Figure 2: Using a Fixed Resistor and a Potentiometer to Trim the TS3006’s Output requency.
Touchstone Semiconductor, Inc. Page 9
630 Alder Drive, Milpitas, CA 95035 TS3006DS 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 f rom its use, and all information provided by Touchstone Semic onductor 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 i mplication 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 thei r 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 t heir respective owners. BOTTOM VIEW TOP VIEW
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