HT9274 Quad Micropower Op Amp Features · Quad micro power op amp · Rail to rail output · Wide range of supply voltage: 1.6V~5.5V · Provides both sink and source output drive capability · High input impedance · Common mode input extends below negative rail · Single supply operation · Pin compatible with LM324/WT274 (14-pin DIP) · Low current consumption: < 5mA per amp · 14-pin DIP/SOP package Applications · Battery powered system · Signal detectors · Sensor amplifier · Active filters · Low power gain blocks · Caller ID systems · Low power comparators · Communication systems General Description pecially ideal for battery powered systems where mA range of standby current is essential for long battery life span. For example, in multi-standard Caller ID systems, HT9274 is ideal as a low power line signal monitor/detector, and in car alarm systems, the HT9274 is excellent for piezo vibratile detector signal amplifier application. The HT9274 is a CMOS quad micro-power operational amplifier featuring high input impedance, extremely low power, high gain and high stability. It allows common mode input voltage range which extends below the negative rail, output swings to both rails with a reasonable sink and souce capability of the output drive current. This cost-effective device is suitable for high gain, low frequency, low power applications, es- Comparison Table ITEM Operating Voltage Operating Current Output Source Current Output Sink Current Input Bias Current GBW Max. Load (To VDD or VSS) HT9274 1.6~5.5V 5mA 500mA 500mA 1pA 0.1MHz >10kW WT274 1.35~10V 9mA 16mA 2mA 1pA 0.1MHz >500kW LM324 3~32V 400mA 20mA 8mA 45nA 1MHz >2kW Block Diagram 1 O U T 4 O U T 1 IN - 4 IN - 1 IN + 4 IN + V D D V S S 2 IN + 3 IN + 2 IN - 3 IN 3 O U T 2 O U T Rev. 1.10 1 November 15, 2013 HT9274 Pin Assignment 1 O U T 1 1 4 4 O U T 1 IN + 3 1 2 4 IN + 1 IN - 1 3 2 V D D 1 1 4 2 IN + 2 IN - 2 O U T 1 0 5 9 6 8 7 H T 9 2 7 4 1 4 D IP -A /S O P -A 4 IN V S S 3 IN + 3 IN - 3 O U T Pin Description Pin No. Pin Name I/O Internal Connection 1 1OUT O CMOS OUT 2 1IN- I PMOS IN Inverting input pin of the op amp 1 3 1IN+ I PMOS IN Noninverting input pin of the op amp 1 4 VDD ¾ ¾ 5 2IN+ I PMOS IN Noninverting input pin of the op amp 2 6 2IN- I PMOS IN Inverting input pin of the op amp 2 7 2OUT O CMOS OUT Output pin of the op amp 2 8 3OUT O CMOS OUT Output pin of the op amp 3 9 3IN- I PMOS IN Inverting input pin of the op amp 3 10 3IN+ I PMOS IN Noninverting input pin of the op amp 3 11 VSS ¾ ¾ 12 4IN+ I PMOS IN Noninverting input pin of the op amp 4 13 4IN- I PMOS IN Inverting input pin of the op amp 4 14 4OUT O CMOS OUT Description Output pin of the op amp 1 Positive power supply Negative power supply, ground Output pin of the op amp 4 Absolute Maximum Ratings Supply Voltage ............................................-0.3V to 6V Storage Temperature ............................-50°C to 125°C Input Voltage..............................VSS-0.3V to VDD+0.3V Operating Temperature...........................-20°C to 75°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Rev. 1.10 2 November 15, 2013 HT9274 Electrical Characteristics Symbol VOS Parameter Ta=25°C Test Conditions VDD Conditions Vi=1.4V Min. Typ. Max. Unit ¾ ¾ 5 mV Input Offset Voltage 5V DVOS/DT Temperature Coefficient of VOS 5V ¾ ¾ 2 ¾ mV/°C IOS Input Offset Current (see note) 5V Vi=Vo=1.4V -20°C<Ta<75°C ¾ 1 100 pA Ib Input Bias Current (see note) 5V Vi=Vo=1.4V -20°C<Ta<75°C ¾ 1 150 pA Vicm Input Common Mode Range 5V ¾ 0.5 ¾ VDD-1 V VOUT+ Positive Output Voltage Swing 5V RL=1MW VIN+-VIN³10mV 4.90 4.95 ¾ V VOUT- Negative Output Voltage Swing 5V RL=1MW VIN--VIN+³10mV ¾ 0.01 0.05 V AVOL Large Signal Voltage Gain 5V Vi=1.4V RL=1MW VO=1 to 4V 70 84 ¾ dB GBW Gain Band Width Product 5V RL=1MW CL=100pF ¾ 0.1 ¾ MHz CMRR Common Mode Rejection Ratio 5V Vi=0.5~4.0V 60 80 ¾ dB PSRR Power Supply Rejection Ratio 2~5V Vo=1.4V 60 80 ¾ dB ICC Supply Current Per Single Amplifier 5V Av=1 Vo=1.4V No load ¾ 3 5 mA SR Slew Rate at Unity Gain 5V No load ¾ 0.03 ¾ V/ms Fm Phase Margin at Unity Gain 5V RL=1MW CL=100pF ¾ 55 ¾ Degree en Input Equivalent Noise Voltage 5V f=1kHz RS=10W å 50 å nV / Hz V01/V02 Cross Talk Attenuation 5V ¾ ¾ 100 ¾ dB IOH Output Source Current 5V VIN+-VIN-³10mV -300 -500 ¾ mA IOL Output Sink Current 5V VIN--VIN+³10mV 300 500 ¾ mA Note: These parameters are periodically sampled but not 100% tested. Rev. 1.10 3 November 15, 2013 HT9274 Functional Description Input stage Output stage The input stage of op amps are nominal PMOS differential amplifiers (see the following diagram), therefore the common mode input voltage can extend to VSS-0.6V. On the other hand the common mode input voltage has to be maintained below (VDD-1)V to keep the input device (M2 and M3) active. This implies that when using HT9274 as a voltage follower, the input as well as output active range will be limited between VSS+0.5V~VDD-1V (approx.). Avoid applying any voltage greater than VDD+0.6V or less than VSS-0.6V to the input pins, otherwise the internal input protection devices may be damaged. The HT9274 uses push-pull CMOS configuration as the output stage of op amps to minimize low power consumption and to provide adequate output driving current. V N o n in v e r tin g In V D D V M 1 Note that the output is an unbuffered structure, therefore the open loop gain will be affected by the load resistor since the voltage gain of this stage can be expressed as (gm5+ gm6)´RL. V B IA S M 5 B IA S O U T F ro m D iffe r e n tia l A m p In v e r tin g In M 2 P M O S D D M 3 P M O S M 6 V S S T o O u tp u t S ta g e V S S M 4 M 5 V Because of the consideration for minimized power consumption, the max. output current is limited to about 400mA for both source and sink drive. This is believed to be enough for most low power systems, however it is recommended to use the load resistor of >10kW for normal applications. In case of heavy load driving, an extern a l b u ff e r s t a g e u s i n g b i p o l a r t r a n s i s t o r s i s recommended. S S Since the input impedance of PMOS is inherently very high, it can directly couple to high impedance elements without loading effect. For example, coupling to ceramic transducers, integrating capacitor and resistor networks. The HT9274 is internally compensated for AC stability and capable to withstand up to a 100pF capacitive load. Actually the extremly high input impedance is its major advantage over the bipolar counterpart, in some application fields such as integrators where the input current of op amp can cause significant error, the HT9274 is a better choice than the popular LM324. Rev. 1.10 4 November 15, 2013 HT9274 Application Circuits Micro Power Sensor Amplifier & Detector V 9 S E N S O R 4 5 3 2 1 1 0 D D 8 D E T _ O U T 7 6 1 3 1 1 1 2 1 4 Micro Power Line Signal Monitor V 2 T IP 1 3 R IN G V D D 4 5 7 6 D E T _ O U T 1 1 B IA S Micro Power Line Voltage Monitor L IN E B A T T 4 3 1 2 D E T _ O U T 1 1 Rev. 1.10 5 November 15, 2013 HT9274 Package Information Note that the package information provided here is for consultation purposes only. As this information may be updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package information. Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be transferred to the relevant website page. · Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications) · Packing Meterials Information · Carton information · PB FREE Products · Green Packages Products Rev. 1.10 6 November 15, 2013 HT9274 14-pin DIP (300mil) outline dimensions A 1 4 B 8 1 7 H C D E Symbol A G I Dimensions in inch Min. Nom. Max. 0.735 0.750 0.775 B 0.240 0.250 0.280 C 0.115 0.130 0.195 D 0.115 0.130 0.150 E 0.014 0.018 0.022 F 0.045 0.060 0.070 G ¾ 0.1 BSC ¾ H 0.300 0.310 0.325 I ¾ ¾ 0.430 Symbol A Rev. 1.10 F Dimensions in mm Min. Nom. Max. 18.67 19.05 19.69 B 6.10 6.35 7.11 C 2.92 3.30 4.95 D 2.92 3.30 3.81 E 0.36 0.46 0.56 F 1.14 1.52 1.78 G ¾ 2.54 BSC ¾ H 7.62 7.87 8.26 I ¾ ¾ 10.92 7 November 15, 2013 HT9274 14-pin SOP (150mil) Outline Dimensions A 8 1 4 1 7 B C C ' G D E Symbol A a Dimensions in inch Min. Nom. Max. ¾ 0.236 BSC ¾ B ¾ 0.154 BSC ¾ C 0.012 ¾ 0.020 C¢ ¾ 0.341 BSC ¾ D ¾ ¾ 0.069 E ¾ 0.050 BSC ¾ F 0.004 ¾ 0.010 G 0.016 ¾ 0.050 H 0.004 ¾ 0.010 a 0° ¾ 8° Symbol Rev. 1.10 F H Dimensions in mm Min. Nom. Max. A ¾ 6.0 BSC ¾ B ¾ 3.9 BSC ¾ C 0.31 ¾ 0.51 C¢ ¾ 8.65 BSC D ¾ ¾ 1.75 E ¾ 1.27 BSC ¾ F 0.10 ¾ 0.25 G 0.40 ¾ 1.27 H 0.10 ¾ 0.25 a 0° ¾ 8° 8 November 15, 2013 HT9274 Copyright Ó 2013 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.10 9 November 15, 2013