PDF HA17901FPK Data sheet ( Hoja de datos )

Número de pieza	HA17901FPK
Descripción	Quadruple Comparators
Fabricantes	Hitachi Semiconductor
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No Preview Available ! HA17901, HA17339 Series Quadruple Comparators Description The HA17901 and HA17339 series products are comparators designed for use in power or control systems. These IC operate from a single power-supply voltage over a wide range of voltages, and feature a reduced power-supply current since the power-supply voltage is determined independently. These comparators have the unique characteristic of ground being included in the common-mode input voltage range, even when operating from a single-voltage power supply. These products have a wide range of applications, including limit comparators, simple A/D converters, pulse/square-wave/time delay generators, wide range VCO circuits, MOS clock timers, multivibrators, and high-voltage logic gates. Features • Wide power-supply voltage range: 2 to 36V • Extremely low current drain: 0.8mA • Low input bias current: 25nA • Low input offset current: 5nA • Low input offset voltage: 2mV • The common-mode input voltage range includes ground. • Low output saturation voltage: 1mV (5µA), 70mV (1mA) • Output voltages compatible with CMOS logic systems 1 page HA17901, HA17339 Series Electrical Characteristics 1 (VCC = 5V, Ta = 25°C) Item Symbol Min Typ Max Unit Test Condition Input offset VIO — 2 7 mV Output switching point: when voltage VO = 1.4V, RS = 0Ω Input bias current IIB — 25 250 nA IIN(+) or IIN(–) Input offset IIO — 5 current 50 nA I – IIN(+) IN(–) Common-mode input voltage1 VCM 0 — VCC – 1.5 V Supply current Voltage Gain Response time2 Output sink current I CC AVD tR Iosink — — — 6 0.8 2 200 — 1.3 — 16 — mA V/mV µs mA RL = ∞ RL = 15kΩ VRL = 5V, RL = 5.1kΩ VIN(–) = 1V, VIN(+) = 0, VO ≤ 1.5V Output saturation VO sat voltage — 200 400 mV VIN(–) = 1V, VIN(+) = 0, Iosink = 3mA Output leakage I LO — 0.1 — current nA VIN(+) = 1V, VIN(–) = 0, VO = 5V Notes: 1. Voltages more negative than –0.3V are not allowed for the common-mode input voltage or for either one of the input signal voltages. 2. The stipulated response time is the value for a 100 mV input step voltage that has a 5mV overdrive. Electrical Characteristics 2 (VCC = 5V, Ta = – 41 to + 125°C) Item Symbol Min Typ Max Unit Test Condition Input offset voltage Input offset current VIO — IIO — — — 7 mV Output switching point: when VO = 1.4V, RS = 0Ω 200 nA I – IIN(-) IN(+) Input bias current IIB — — 500 nA Common-mode input voltage*1 VCM 0 — VCC – 2.0 V Output saturation VO sat — — 440 mV VIN(–) ≥ 1V, VIN(+) = 0, Iosink ≤ voltage 4mA Output leakage I LO — 1.0 — current µA VIN(–) = 0V, VIN(+) ≥ 1V, VO = 30V Supply current I CC — — 4.0 mA All comparators: RL = ∞, All channels ON Note: 1. Voltages more negative than –0.3V are not allowed for the common-mode input voltage or for either one of the input signal voltages. 5 5 Page HA17901, HA17339 Series 2. Pulse Generator The charge and discharge circuits in the circuit from figure 1 are separated by diodes in this circuit. (See figure 3.) This allows the pulse width and the duty cycle to be set independently. Figure 4 shows the waveforms generated by this circuit. VCC R1 1M D1 IS2076 R2 100k D2 IS2076 C 80pF VCC – HA17901 VCC + 1M 1M 1M Vout Figure 3 Pulse Generator Horizontal: 2 V/div, Vertical: 20 µs/div, VCC = 5 V Horizontal: 5 V/div, Vertical: 20 µs/div, VCC = 15 V Figure 4 Operating Waveforms 3. Voltage Controlled Oscillator In the circuit in figure 5, comparator A1 operates as an integrator, A2 operates as a comparator with hysteresis, and A3 operates as the switch that controls the oscillator frequency. If the output Vout1 is at the low level, the A3 output will go to the low level and the A1 inverting input will become a lower level than the A1 noninverting input. The A1 output will integrate this state and its output will increase towards the high level. When the output of the integrator A1 exceeds the level on the comparator A2 inverting input, A2 inverts to the high level and both the output Vout1 and the A3 output go to the high level. This causes the integrator to integrate a negative state, resulting in its output decreasing towards the low level. Then, when the A1 output level becomes lower than the level on the A2 noninverting input, the output Vout1 is once again inverted to the low level. This operation generates a square wave on Vout1 and a triangular wave on Vout2. 11 11 Page

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