In the micropower light-integrating darkroom timer design, what is the maximum battery drain specified to achieve a 2-year life with a 9-volt, 500mAh battery?
Explanation
This question assesses the understanding of basic power budgeting in micropower design, as illustrated by the specific requirements of the darkroom timer example in Chapter 14.
Other questions
What is the typical supply current per amp for the TLC25L2A micropower op-amp when Vs is +5V, according to the data provided?
What is a significant problem with bipolar programmable op-amps when operated at very low supply currents?
In the micropower light-integrating darkroom timer circuit, what is the primary function of the U2 (3440) op-amp?
What is the typical input bias current (Ib) for the OP-90 micropower op-amp?
According to the provided text, what is a key advantage of using modern MOSFET-based programmable op-amps like the ICL761x series over older bipolar types for micropower design?
What is the typical slew rate for the LT1012C micropower op-amp?
What unique feature does the LT1040 micropower comparator incorporate to achieve a very low average quiescent current?
Which of the following op-amps from Table 14.6 has the lowest typical supply current per amp at +5V?
What is the primary reason that using an ON/OFF switch was avoided in the design of the micropower light-integrating darkroom timer?
What is the primary reason the 3440 op-amp was considered a good choice for the U2 stage in the darkroom timer design?
What is the typical supply current (I_q) for the TLC27M4 micropower op-amp?
In the micropower darkroom timer design, what is the combined continuous current drain of the only two components that run continually, U1_ac and U2?
What is the primary method suggested for keeping CMOS logic power consumption low?
What is a major threat to low-power operation in CMOS circuits that can be triggered by current through protection diodes and results in heavy supply-to-supply conduction?
What is the typical supply current for the LP339 micropower quad comparator, per section?
What is the typical quiescent current of an Intersil ICM7555, a CMOS version of the 555 timer, at 5 volts?
How is a controller-type microprocessor generally distinguished from a computation-oriented type in the context of low-power design?
What is the specified static current drain for the Harris/Intel 80C86 and 80C88 microprocessors when the clock is stopped?
What is the purpose of a 'bus-hold' circuit, as found in some Harris and Intel CMOS peripheral chips?
According to the table of low-power comparators, what is the output type for the TLC372C?
In the degree-day logger design example, what component was chosen as the temperature sensor?
What is a key difference between the 'WAIT' mode and 'STOP' mode in the Motorola MC146805 CMOS controller?
What is the typical supply current for the HA5151 micropower op-amp at +5V?
What is one of the main problems associated with CMOS op-amps that the TI LinCMOS TLC250/270 series aims to solve using phosphorus-doped polysilicon gate technology?
What is the primary reason for using a 'current-sensing resistor' in the VDD lead of a CMOS chip in low-power design?
What is the maximum specified total supply voltage for most typical CMOS op-amps mentioned in the chapter?
What is the typical quiescent current of the OP-97E micropower op-amp at a supply voltage of +5V?
What is the maximum supply current per amp for the TLC251B programmable op-amp when it is set to its highest current mode?
Why must unused inputs of CMOS logic devices be tied to a supply rail (ground or VDD) in low-power designs?
What is the typical quiescent current of the OP-22 programmable op-amp when the per-amp supply current is set to 1 uA?
Which device is described as the 'undisputed champ' for operation at extremely low currents, capable of running at a few nanoamps of supply current?
What is the primary cause of a 'dramatic increase of input (leakage) current' in all FET op-amps (both JFET and MOSFET types)?
In the degree-day logger example, what is the typical idle current drain of the CPU?
What is the key functional difference between a programmable Unijunction Transistor (UJT) like the 2N6028 and a classic UJT?
What does the text suggest is an easy way to induce SCR latchup in a CMOS circuit board?
What is the typical supply current for the LT1178A micropower op-amp at +5V?
In the context of micropower digital design, what is M^2L (Mickey Mouse logic)?
What is the typical quiescent current of a standard 4000-series CMOS relaxation oscillator when operated at 5 volts?
According to Table 14.8, what is the typical supply current for the LP311 low-power comparator?
In the degree-day logger design example, why was power switching used for the AD803 A/D converter?
What type of device is the Motorola MC145406, as described in the section on RS-232 drivers?
What is the key advantage of using a 'quasi-programmable' op-amp like the ICL7612?
What is the typical supply voltage range for the 74HC and 74AC series of high-speed CMOS logic?
In the degree-day logger design example, what is the maximum idle current drain specified for the RTC (Real-Time Clock)?
What is the purpose of the 'hibernation' mode in an RS-232 driver/receiver like the LT1039?
What is the typical value for the e_n (input noise voltage) at 10Hz for the AD821B micropower op-amp?
When using a 'software UART' to eliminate a hardware UART chip, which function is described as being more of a challenge to implement?
What is the minimum specified total supply voltage for the LM10 micropower op-amp?
What is the primary reason to choose an HClAC logic family over a 4000B/74C family in a low-power design?