TS1001 TOUCHSTONE | Alldatasheet

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Technical content

© 2011 Touchstone Semiconductor, Inc. All rights reserved.

FEATURES

Single 0.65V to 2.5V Operation Supply current: 0.6μA (typ) Offset voltage: 0.5mV (typ) Low TCVOS: 20µV/°C (max) AVOL Driving 100kΩ Load: 90dB (min) Unity Gain Stable Rail-to-rail Input and Output No Output Phase Reversal 5-pin SC70 Package

APPLICATIONS

Battery/Solar-Powered Instrumentation Portable Gas Monitors Low-voltage Signal Processing Nanopower Active Filters Wireless Remote Sensors Battery-powered Industrial Sensors Active RFID Readers Powerline or Battery Current Sensing Handheld/Portable POS Terminals

DESCRIPTION

The TS1001 is the industry’s first sub-1µA supply current, precision CMOS operational amplifier rated to operate at a nominal supply voltage of 0.8V. Optimized for ultra-long-life battery-powered applications, the TS1001 is Touchstone’s first operational amplifier in the “NanoWatt Analog™” high-performance analog integrated circuits portfolio. The TS1001 exhibits a typical input offset voltage of 0.5mV, a typical input bias current of 25pA, and rail- to-rail input and output stages. The TS1001 can operate from single-supply voltages from 0.65V to 2.5V. The TS1001’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: nanopower active filters, wi reless remote sensors, battery and powerline current sensors, portable gas monitors, and handheld/portable POS terminals. The TS1001 is fully specified at V DD = 0.8V and over the industrial temperature range ( −40°C to +85°C) and is available in a PCB-space saving 5-lead SC70 surface-mount package. Percent of Units - % 30% 25% 20% 15% 10% Supply Current Distribution Supply Current - µA THE ONLY 0.8V/0.6µA RAIL-TO-RAIL OP AMP TYPICAL APPLICATION CIRCUIT A NanoWatt 2-Pole Sallen Key Low Pass Filter Patent(s) Pending NanoWatt Analog and the Touchstone Semiconductor logo are registered trademarks of Touchstone Semiconductor, Incorporated. VDD = 0.8V

Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (Derate 3.87mW/°C above +70°C) .. 310 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 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 TAPE & REEL ORDER NUMBER PART MARKING PACKAGE QUANTITY TS1001IJ5T TAE 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 = +0.8V, 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 V DD-VSS 0.65 0.8 2.5 V Supply Current I SY R L = Open circuit TA = 25°C 0.6 0.8 µA -40°C ≤ TA ≤ 85°C 1 Input Offset Voltage V OS V IN = VSS or VDD TA = 25°C 0.5 3 mV -40°C ≤ TA ≤ 85°C 6 Input Offset Voltage Drift TCV OS 20 µV/°C Input Bias Current I IN+, IIN- V IN+, VIN- = (VDD - VSS)/2 TA = 25°C 0.025 nA -40°C ≤ TA ≤ 85°C 20 Input Offset Current I OS Specified as IIN+ - IIN- VIN+, VIN- = (VDD - VSS)/2 TA = 25°C 0.01 nA -40°C ≤ TA ≤ 85°C 2 Input Voltage Range IVR Guaranteed by Input Offset Voltage Test V SS V DD V Common-Mode Rejection Ratio CMRR 0V ≤ VIN(CM) ≤ 0.4V 50 74 dB Power Supply Rejection Ratio PSRR 0.65V ≤ (VDD - VSS) ≤ 2.5V 50 74 dB Output Voltage High V OH Specified as VDD - VOUT, RL = 100kΩ to VSS TA = 25°C 1.2 2 mV -40°C ≤ TA ≤ 85°C 2.5 Specified as VDD - VOUT, RL = 10kΩ to VSS TA = 25°C 10 16 -40°C ≤ TA ≤ 85°C 20 Output Voltage Low V OL Specified as VOUT - VSS, RL = 100kΩ to VDD TA = 25°C 0.4 0.6 mV -40°C ≤ TA ≤ 85°C 1 Specified as VOUT - VSS, RL = 10kΩ to VDD TA = 25°C 5 7 -40°C ≤ TA ≤ 85°C 10 Short-circuit Current ISC+ V OUT = VSS TA = 25°C 0.5 1.5 mA -40°C ≤ TA ≤ 85°C 0.3 ISC- V OUT = VDD TA = 25°C 4.5 11 Open-loop Voltage Gain A VOL V SS+50mV ≤ VOUT ≤ VDD-50mV TA = 25°C 90 104 dB -40°C ≤ TA ≤ 85°C 85 Gain-Bandwidth Product GBWP R L = 100kΩ to VSS, CL = 20pF 4 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 1.5 V/ms Full-power Bandwidth FPBW FPBW = SR/( π • VOUT,PP); VOUT,PP = 0.7VPP 680 Hz Input Voltage Noise Density e n f = 1kHz 0.6 µV/√Hz Input Current Noise Density i n 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.

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 =0.8V TA = +25°C Input Offset Voltage vs Input Common-Mode VoltageINPUT OFFSET VOLTAGE - mV INPUT COMMON-MODE VOLTAGE - Volt VDD = 2.5V TA = +25°C +25°C +85°C -40°C 0.3 0.4 0.5 0.6 0.7 0.8 TA = +25°C 0.65 0.6 0.55 0.5 0 0.2 0.4 0.6 0.8 TA = +25°C 0.65 0.6 0.55 0.5 0 0.5 1.5 2 2.51 TA = +25°C 0.5 1.5 2 2.51 VINCM = VDD 0.65 0.6 0.55 0.5 0.55 VINCM = 0V 0 0.2 0.4 0.6 0.8 0.5 -0.5 0.5 -0.5 0 0.5 1.5 2 2.51 0.8 1.2 0.65 2.5

-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 = 2.5V TA = +25°C VDD =0.8V TA = +25°C 100 -50 -25 250 200 100 -50 150 RL = 100kΩ VDD = 0.8V VDD = 2.5V RL = 100kΩ VDD = 0.8V VDD = 2.5V 4.5 3.5 0.5 1.5 2.5 1.8 1.6 0.8 0.4 1.2 1.4 0.2 0.6 OUTPUT SATURATION VOLTAGE - mV OUTPUT SATURATION VOLTAGE - mV TEMPERATURE - °C TEMPERATURE - °C RL = 10kΩ VDD = 0.8V VDD = 2.5V RL = 10kΩ VDD = 0.8V VDD = 2.5V 16

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 = 2.5V, VSS = GND, RLOAD = 100kΩ, CLOAD = 15pF 200µs/DIV OUTPUT SHORT-CIRCUIT CURRENT - mA INPUT Small-Signal Transient Response VDD = 2.5V, VSS = GND, RLOAD = 100kΩ, CLOAD = 15pF 2ms/DIV OUTPUT INPUT OUTPUT TEMPERATURE - °C TEMPERATURE - °C VDD = 0.8V VDD = 2.5V VDD = 0.8V VDD = 2.5V VOUT = 0V VOUT = VDD Gain and Phase vs. Frequency GAIN - dB FREQUENCY - Hz PHASE - Degrees 10 1k 10k 100 -20 -250 -150 -50 150 100k VDD = 0.8V TA = +25°C RL = 100kΩ CL = 20pF AVCL = 1000 V/V PHASE GAIN 4kHz 70°

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 TS1001 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 differential 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 TS1001 is a function of the applied input common-mode voltage, VINCM. The VOS has a crossover point at ~0.4V from VDD (Refer to the VOS vs. VCM curve in the Typical Operating Characteristics section). Caution should be taken in applications where the input signal amplitude is comparable to the TS1001’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 TS1001 output stages voltage swings within 1.2mV from the rails at 0.8V 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 10kΩ load, the TS1001 swings within 10mV of V DD and within 5mV 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 proportional 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 range 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 applications, oxygen sensors are used to detect the absence of oxygen; for example, vacuum-packaging of food products is one example.

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+1 (408) 215 - 1220 ▪ www.touchstonesemi.com RTFDS PACKAGE OUTLINE DRAWING 5-Pin SC70 Package Outline Drawing (N.B., Drawings are not to scale) Information furnished by Touchstone Semic onductor is believed to be accurate and reli able. However, Touchstone Semiconductor do es not assume any responsibility for its use nor for any infringements of patents or other rights of third parties that may result fro m 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 pr oduct descriptions at any time without any a dvance notice. No license is granted by implication or otherwise unde r any patent or patent rights of Touchstone Semiconductor. Touchs tone Semiconductor assumes no liability for applic ations assistance or customer product des ign. Customers are responsible for their products and applications using Touchstone Semiconductor components. To minimize the risk a ssociated with customer products and applications , customers should provide adequate design and operating safeguards . Trademarks and registered trademarks are the property of the ir respective owners.