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TS1005 Rev. 1.0 Page 1
FEATURES
Single 0.8V to 5.5V Operation Supply current: 1.3μA (typ) Input Bias Current: 2pA (typ) Low TCVOS: 9µV/°C (typ) AVOL Driving 100kΩ Load: 90dB (min) Gain-Bandwidth Product: 20kHz Unity Gain Stable Rail-to-rail Input and Output No Output Phase Reversal 5-pin SC70 or 5-Pin SOT23 Package
APPLICATIONS
Battery/Solar-Powered Instrumentation Portable Gas Monitors Low-voltage Signal Processing Micropower Active Filters Wireless Remote Sensors Battery-powered Industrial Sensors Active RFID Readers Powerline or Battery Current Sensing Handheld/Portable POS Terminals
DESCRIPTION
The TS1005 is a 1.3µA supply current, precision CMOS operational amplifier designed to operate over a supply voltage range from 0.8V to 5.5V with a GBWP of 20kHz. Fully spec ified at 1.8V, the TS1005 is optimized for ultra-long-life battery-powered applications. The TS1005 is the fifth operational amplifier in the “NanoWatt Analog™” high- performance analog integrated circuits portfolio. The TS1005 exhibits a typical i nput bias current of 2pA, and has rail-to-rail input and output stages. The TS1005’s combined features make it an excellent choice in applications where very low supply current and low operating supply voltage translate into very long equipment operating time. Applications include: micropower active filters, wireless remote sensors, battery and powerline current sensors, portable gas monitors, and handheld/portable POS terminals. The TS1005 is fully specified over the industrial temperature range (−40°C to +85°C) and is available in a PCB-space saving 5-lead SC70 and SOT23 packaging. TYPICAL APPLICATION CIRCUIT A MicroWatt 2-Pole Sallen Key Low Pass Filter 15% Percent of Units - % 20% 30% 25% 10% Supply Current Distribution Supply Current - µA VDD = 1.8V A 0.8V TO 5.5V, 1.3µA, 20kHz RAIL-TO-RAIL SINGLE OP AMP
Page 2 TS1005 Rev. 1.0 ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23(Derate 3.87mW/°C above +70°C) ... 312 mW 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 op erational 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 TAPE & REEL ORDER NUMBER PART MARKING PACKAGE QUANTITY TAPE & REEL ORDER NUMBER PART MARKING PACKAGE QUANTITY TS1005IJ5 TAJ --- TS1005IG5 TAEB --- TS1005IJ5T 3000 TS1005IG5T 3000 Lead-free Program: Silicon Labs supplies only lead-free packaging. Consult Silicon Labs for products specified with wider operating temperature ranges.
TS1005 Rev. 1.0 Page 3
ELECTRICAL CHARACTERISTICS
VDD = +1.8V, VSS = 0V, VINCM = VSS; RL = 100kΩ to (VDD-VSS)/2; TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. See Note 1 Parameters Symbol Conditions Min Typ Max Units Supply Voltage Range VDD-VSS 0.8 5.5 V Supply Current ISY R L = Open circuit TA = 25°C 1.3 1.6 µA -40°C ≤ TA ≤ 85°C 1.8 Input Offset Voltage VOS V IN = VSS or VDD TA = 25°C 0.8 3 mV -40°C ≤ TA ≤ 85°C 5 Input Offset Voltage Drift TCVOS 9 µV/°C Input Bias Current IIN+, IIN- V IN+, VIN- = (VDD - VSS)/2 TA = 25°C 2 pA -40°C ≤ TA ≤ 85°C 100 Input Offset Current IOS Specified as IIN+ - IIN- VIN+, VIN- = (VDD - VSS)/2 TA = 25°C 2 pA -40°C ≤ TA ≤ 85°C 50 Input Voltage Range IVR Guaranteed by Input Offset Voltage Test VSS V DD V Common-Mode Rejection Ratio CMRR Vdd = 5.5V, 0V ≤ VIN(CM) ≤ 5.0V TA = 25°C 70 90 dB -40°C ≤ TA ≤ 85°C 68 Power Supply Rejection Ratio PSRR 0.8V ≤ (VDD - VSS) ≤ 5.5V TA = 25°C 70 90 dB -40°C ≤ TA ≤ 85°C 67 Output Voltage High VOH Specified as VDD - VOUT, RL = 100kΩ to VSS TA = 25°C 3.7 mV -40°C ≤ TA ≤ 85°C 6 Specified as VDD - VOUT, RL = 10kΩ to VSS TA = 25°C 30 -40°C ≤ TA ≤ 85°C 60 Output Voltage Low VOL Specified as VOUT - VSS, RL = 100kΩ to VDD TA = 25°C 1.5 mV -40°C ≤ TA ≤ 85°C 6 Specified as VOUT - VSS, RL = 10kΩ to VDD TA = 25°C 15 -40°C ≤ TA ≤ 85°C 30 Short-circuit Current ISC+ V OUT = VSS TA = 25°C 4 mA -40°C ≤ TA ≤ 85°C 2 ISC- V OUT = VDD TA = 25°C 15 Open-loop Voltage Gain AVOL V SS+50mV ≤ VOUT ≤ VDD-50mV TA = 25°C 91 110 dB -40°C ≤ TA ≤ 85°C 84 Gain-Bandwidth Product GBWP R L = 100kΩ to VSS, CL = 20pF 20 kHz Phase Margin φM Unity-gain Crossover, RL = 100kΩ to VSS, CL = 20pF 70 degrees Slew Rate SR R L = 100kΩ to VSS, AVCL = +1V/V 7.5 V/ms Full-power Bandwidth FPBW FPBW = SR/(π • VOUT,PP); VOUT,PP = 0.7VPP 3400 Hz Input Voltage Noise Density en f = 1kHz 0.6 µV/√Hz Input Current Noise Density in f = 1kHz 10 pA/√Hz Note 1: All specifications are 100% tested at TA = +25°C. Specification limits over temperature (TA = TMIN to TMAX) are guaranteed by device characterization, not production tested.
TS1005 Rev. 1.0 Page 4 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage SUPPLY CURENT - µA SUPPLY VOLTAGE - Volt Supply Current vs Input Common-Mode Voltage SUPPLY CURENT - µA INPUT COMMON-MODE VOLTAGE - Volt Supply Current vs Input Common-Mode Voltage Input Offset Voltage vs Input Common-Mode Voltage INPUT OFFSET VOLTAGE - mV INPUT OFFSET VOLTAGE - mV INPUT COMMON-MODE VOLTAGE - Volt Input Offset Voltage vs Supply Voltage INPUT COMMON-MODE VOLTAGE - Volt SUPPLY CURENT - µA SUPPLY VOLTAGE - Volt VDD =1.8V TA = +25°C Input Offset Voltage vs Input Common-Mode VoltageINPUT OFFSET VOLTAGE - mV INPUT COMMON-MODE VOLTAGE - Volt VDD = 5.5V TA = +25°C +25°C +85°C -40°C 1.1 1.2 1.3 1.4 1.5 TA = +25°C 1.5 1.3 1.1 1.0 0 0.6 1.8 TA = +25°C 1.5 1.4 1.2 1.0 0 1.1 3.3 4.4 5.5 TA = +25°C VINCM = VDD 2.5 1.25 -2.5 VINCM = 0V 0 1.2 1.8 0.7 0.35 -0.35 0.9 0.45 -0.9 -0.45 0 3.3 4.4 5.52.2 1.2 1.4 1.2 1.3 1.1 2.2 1.25 2.4 3.9 0.6 -0.7 1.1
TS1005 Rev. 1.0 Page 5 -40 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current (IIN+, IIN-) vs Input Common-Mode Voltage INPUT BIAS CURRENT - pA INPUT COMMON-MODE VOLTAGE - Volt Output Voltage High (VOH) vs Temperature, RLOAD =100kΩ TEMPERATURE - °C Output Voltage Low (VOL) vs Temperature, RLOAD =100kΩ TEMPERATURE - °C Output Voltage High (VOH) vs Temperature, RLOAD =10kΩ Output Voltage Low (VOL) vs Temperature, RLOAD =10kΩ Input Bias Current (IIN+, IIN-) vs Input Common-Mode Voltage OUTPUT SATURATION VOLTAGE - mV INPUT COMMON-MODE VOLTAGE - Volt INPUT BIAS CURRENT - pA OUTPUT SATURATION VOLTAGE - mV VDD = 5.5V VDD =1.8V RL = 100kΩ VDD = 1.8V VDD = 5.5V RL = 100kΩ VDD = 1.8V VDD = 5.5V 4.75 0.75 1.75 2.75 110 OUTPUT SATURATION VOLTAGE - mV OUTPUT SATURATION VOLTAGE - mV TEMPERATURE - °C TEMPERATURE - °C RL = 10kΩ VDD = 1.8V VDD = 5.5V RL = 10kΩ VDD = 1.8V VDD = 5.5V 3.75 TA = +25°C TA = +85°C TA = +25°C TA = +85°C
Page 6 TS1005 Rev. 1.0 VOUT(N) - 100µV/DIV 0.1Hz to 10Hz Output Voltage Noise TYPICAL PERFORMANCE CHARACTERISTICS Output Short Circuit Current, ISC+ vs Temperature OUTPUT SHORT-CIRCUIT CURRENT - mA Output Short Circuit Current, ISC- vs Temperature Large-Signal Transient Response VDD = 5.5V, VSS = GND, RLOAD = 100kΩ, CLOAD = 15pF 200µs/DIV OUTPUT SHORT-CIRCUIT CURRENT - mA INPUT Small-Signal Transient Response VDD = 5.5V, VSS = GND, RLOAD = 100kΩ, CLOAD = 15pF 2ms/DIV OUTPUT INPUT OUTPUT TEMPERATURE - °C TEMPERATURE - °C VDD = 1.8V VDD = 5.5V VDD = 1.8V VDD = 5.5V VOUT = 0V VOUT = VDD 5.5 8.5 14.5
1 Second/DIV
100µVPP 23.5 Gain and Phase vs. Frequency GAIN - dB FREQUENCY - Hz PHASE - Degrees 10 1k 10k 100 -10 100 100k PHASE GAIN 20kHz 70°
TS1005 Rev. 1.0 Page 7 PIN FUNCTIONS Pin Label Function 1 OUT Amplifier Output. 2 V SS Negative Supply or Analog GND. If applying a negative voltage to this pin, connect a 0.1µF capacitor from this pin to analog GND. 3 +IN Amplifier Non-inverting Input. 4 -IN Amplifier Inverting Input. 5 V DD Positive Supply Connection. Connect a 0.1µF bypass capacitor from this pin to analog GND. THEORY OF OPERATION The TS1005 is fully functional for an input signal from the negative supply (V SS or GND) to the positive supply (VDD). The input stage consists of two differential amplifiers, a p-channel CMOS stage and an n-channel CMOS stage that are active over different ranges of the input common mode voltage. The p-channel input pair is active for input common mode voltages, V INCM, between the negative supply to approximately 0.4V below the positive supply. As the common-mode input voltage moves closer towards VDD, an internal current mirror activates the n-channel input pair differ ential pair. The p-channel input pair becomes inactive for the balance of the input common mode voltage range up to the positive supply. Because both input stages have their own offset voltage (V OS) characteristic, the offset voltage of the TS1005 is a function of the applied input common-mode voltage, V INCM. The V OS has a crossover point at ~0.4V from V DD (Refer to the V OS vs. V CM curve in the Typical Operating Characteristics section). Caution should be taken in applications where the input signal amplitude is comparable to the TS1005’s V OS value and/or the design requires high accuracy. In these situations, it is necessary for the input signal to avoid the crossover point. In addition, amplifier parameters such as PSRR and CMRR which involve the input offset voltage will also be affected by changes in the input common-mode voltage across the differential pair transition region. The second stage is a folded-cascode transistor arrangement that converts the input stage differential signals into a single-ended output. A complementary drive generator supplies current to the output transistors that swing rail to rail. The TS1005 output stages voltage swings within 3.5mV from the rails at 1.8V supply when driving an output load of 100kΩ - which provides the maximum possible dynamic range at the output. This is particularly important when operating on low supply voltages. When driving a stiffer 10k Ω load, the TS1005 swings within 30mV of V DD and within 13mV of VSS (or GND). APPLICATIONS INFORMATION Portable Gas Detection Sensor Amplifier Gas sensors are used in many different industrial and medical applications. Gas sensors generate a current that is proporti onal to the percentage of a particular gas concentration sensed in an air sample. This output current flows through a load resistor and the resultant voltage drop is amplified. Depending on the sensed gas and sensitivity of the sensor, the output current can be in the range of tens of microamperes to a few milliamperes. Gas sensor datasheets often specify a recommended load resistor value or a ra nge of load resistors from which to choose. There are two main applications for oxygen sensors – applications which sense oxygen when it is abundantly present (that is, in air or near an oxygen tank) and those which detect traces of oxygen in parts-per-million concentration. In medical applications, oxygen sensors are used when air quality or oxygen delivered to a patient needs to be monitored. In fresh air, the concentration of oxygen is 20.9% and air samples containing less than 18% oxygen are considered dangerous. In industrial
TS1005 Rev. 1.0 Page 11 Package outline drawing 5-Pin SC70 Package Outline Drawing (N.B., Drawings are not to scale)
Page 12 Silicon Laboratories, Inc. TS1005 Rev. 1.0 400 West Cesar Chavez, Austin, TX 78701 +1 (512) 416-8500 ▪ www.silabs.com PACKAGE OUTLINE DRAWING 5-Pin SOT23 Package Outline Drawing (N.B., Drawings are not to scale) Patent Notice Silicon Labs invests in research and development to help our customers differentiate in the market with innovative low-power, small size, analog-intensive mixed-signal solutions. Silicon Labs' extensive patent portfolio is a testament to our unique approach and world-class engineering team. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.
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