HT9291/HT9292/HT9294 TinyPowerTM Operation Amplifier Features General Description • Wide operating voltage: 1.4V to 5.5V The Holtek HT9291/HT9292/HT9294 range of Low Power Operation Amplifiers offer the advantage of a single supply voltage down to as low as 1.4V as well as the advantages of an extremely low quiescent current of only 0.6µA/amplifier. One other major advantage of these devices lie in their rail-to-rail voltage operation for maximum range. The devices also provide a typical gain bandwidth product of 11kHz and are also unity gain stable. The devices are available in a range of packages according the number of internal amplifiers. The special characteristics of these devices will ensure their excellent use in applications with stringent low power demands such as portable products, battery powered equipment, low power sensor signal processing etc. • Low quiescent current: typical 0.6µA/amplifier • Rail-to-Rail output • Gain bandwidth: 11kHz typical • Unity gain stable • Available in Single, Dual and Quad OP′s package types • Package type: ♦♦ HT9291: SOT23-5 ♦♦ HT9292: 8-pin DIP/SOP ♦♦ HT9294: 14-pin DIP/SOP Applications • Wearable products Selection Table • Temperature measurement • Battery powered products • Portable equipment • Low power sensors Part No. Amplifiers Package HT9291 1 SOT23-5 HT9292 2 8DIP/SOP HT9294 4 14DIP/SOP Block Diagram Pin Assignment Rev. 1.20 1 September 10, 2013 HT9291/HT9292/HT9294 Pin Descriptions HT9291 Pin No. Pin Name 1 OUT Analog output Description 2 VSS Negative power supply 3 IN+ Non-inverting input 4 IN- Inverting input 5 VDD Pin No. Pin Name 1 1OUT Analog output (operation amplifier 1) 2 1IN- Inverting input (operation amplifier 1) 3 1IN+ Non-inverting input (operation amplifier 1) 4 VSS Negative power supply 5 2IN+ Non-inverting input (operation amplifier 2) 6 2IN- Inverting input (operation amplifier 2) 7 2OUT Analog output (operation amplifier 2) 8 VDD Positive power supply Pin No. Pin Name 1 1OUT Analog output (operation amplifier 1) 2 1IN- Inverting input (operation amplifier 1) 3 1IN+ Non-inverting input (operation amplifier 1) 4 VDD Positive power supply 5 2IN+ Non-inverting input (operation amplifier 2) 6 2IN- Inverting input (operation amplifier 2) 7 2OUT Analog output (operation amplifier 2) 8 3OUT Analog output (operation amplifier 3) 9 3IN- Inverting input (operation amplifier 3) 10 3IN+ Non-inverting input (operation amplifier 3) 11 VSS Negative power supply 12 4IN+ Non-inverting input (operation amplifier 4) 13 4IN- Inverting input (operation amplifier 4) 14 4OUT Analog output (operation amplifier 4) Positive power supply HT9292 Description HT9294 Rev. 1.20 Description 2 September 10, 2013 HT9291/HT9292/HT9294 Absolute Maximum Ratings Supply Voltage ......................................................6.0V Input Voltage ............................... VSS-0.3V~VDD+0.3V Difference Input Voltage ............................ ±(VDD-VSS) ESD protection on all pins (HBM;MM)....≥4kV; 400V Storage Temperature......................... −65°C to +150°C Operating Temperature......................... −40°C to 85°C Junction Temperature.......................................... 150°C Note: These are stress ratings only. Stresses exceeding the range specified under ″Absolute Maximum Ratings″ 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. Electrical Characteristics Unless otherwise indicated, VSS=GND, Ta=25°C, VCM=VDD/2, VL=VDD/2, and RL=1MΩ to VL, CL=60pF Symbol Parameter Test Conditions Conditions VDD Typ. Max. Unit VDD Supply Voltage — 1.4 — 5.5 V VOS Input Offset Voltage 5V VIN=VCM/2 −5.0 — 5.0 mV 5V VIN=VCM/2 — ±2 — µV/°C ∆VOS/∆T Drift with Temperature — Min. IOS Input Offset Current 5V Ta=25°C — ±5 — pA IB Input Bias Current 5V Ta=25°C — ±50 — pA VCM Input Common Mode Range 5V 0 — VDD−1.2 V VSS+10 — VDD−10 mV VSS+20 — VDD−50 mV — VOH Maximum Output Voltage Swing 5V 0.5V input overdrive RL=1MΩ to VL VOL Maximum Output Voltage Swing 5V 0.5V input overdrive RL=50kΩ to VL AOL DC Open-Loop Gain (large signal) 5V VOUT=0.2V to VDD−0.2V, VIN=VCM/2 70 100 — dB GBW Gain BandWidth Product 5V RL=1MΩ, CL=60pF, VIN=VCM/2 — 11 — kHz — 50 — ° Φm Phase Margin 5V RL=1MΩ, CL=60pF G=+1V/V, VIN+= VDD/2 CMRR Common Mode Rejection Ratio 5V VCM=0V to VDD−1.4V 60 90 — dB PSRR Power Supply Rejection Ratio 5V VCM = 0.2V 65 95 — dB ICC Supply Current Per Single Amplifier 5V Io=0A for HT9291 0.50 0.80 1.20 µA Io=0A for HT9292/HT9294 0.30 0.60 1.00 µA SR Slew Rate at Unity Gain 5V RL=1MΩ, CL=60pF — 5 — V/ms 5V VIN+ − VIN- ≥ 10mV −0.3 −1.2 — mA 5V VIN- − VIN+ ≥ 10mV 1 4 — mA IO_SOURCE Output Short Circuit Source Current IO_SINK Rev. 1.20 Output Short Circuit Sink Current 3 September 10, 2013 HT9291/HT9292/HT9294 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−1.2V) to keep the input device (M2 and M3) active. This implies that when using HT9291/HT9292/HT9294 as a voltage follower, the input as well as output active range will be limited between VSS~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 HT9291/HT9292/HT9294 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 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. D D V B IA S M 1 N o n in v e r tin g In In v e r tin g In M 2 P M O S M 4 S S M 3 P M O S M 5 V Because of the consideration for minimized power consumption, the output short circuit current is limited to about -1.2mA for source drive and 4mA for sink drive. This is believed to be enough for most low power systems, however it is recommended to use the load resistor of >1MΩ for normal applications. In case of heavy load driving, an external buffer stage using bipolar transistors is recommended. T o O u tp u t S ta g e V 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 HT9291/HT9292/HT9294 is internally compensated for AC stability and capable to withstand up to a 60pF 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. Application Circuits Two Op Amp Instrumentation Amplifier High Side Battery Current Sensor Rev. 1.20 4 September 10, 2013 HT9291/HT9292/HT9294 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. 1.20 5 September 10, 2013 HT9291/HT9292/HT9294 5-pin SOT23-5 Outline Dimensions Symbol Min. Nom. Max. A 0.030 — 0.031 A1 0.000 — 0.002 A2 0.028 0.030 0.031 b 0.014 — 0.020 C 0.004 — 0.008 D — 0.114 BSC — E — 0.110 BSC — E1 — 0.063 BSC — e — 0.037 BSC — e1 — 0.075 BSC — L 0.015 0.018 0.024 L1 — 0.024 BSC — θ 0° — 8° Symbol Rev. 1.20 Dimensions in inch Dimensions in mm Min. Nom. Max. A 0.75 — 0.80 A1 0.00 — 0.05 A2 0.70 0.75 0.78 b 0.35 — 0.50 C 0.10 — 0.20 D — 2.90 BSC — E — 2.80 BSC — E1 — 1.60 BSC — e — 0.95 BSC — e1 — 1.90 BSC — L 0.37 0.45 0.60 L1 — 0.60 BSC — θ 0° — 8° 6 September 10, 2013 HT9291/HT9292/HT9294 8-pin DIP (300mil) Outline Dimensions Symbol Nom. Max. A 0.355 0.365 0.400 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 — 0.100 BSC — H 0.300 0.310 0.325 I — — 0.430 Symbol Rev. 1.20 Dimensions in inch Min. Dimensions in mm Min. Nom. Max. 10.16 A 9.02 9.27 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 — 2.54 BSC — H 7.26 7.87 8.26 I — — 10.92 7 September 10, 2013 HT9291/HT9292/HT9294 14-pin DIP (300mil) Outline Dimensions Symbol Min. Nom. Max. A 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 — 0.10 BSC — H 0.300 0.310 0.325 I — — 0.430 Symbol Rev. 1.20 Dimensions in inch Dimensions in mm Min. Nom. Max. A 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 — 2.54 BSC — H 7.62 7.87 8.26 I — — 10.92 8 September 10, 2013 HT9291/HT9292/HT9294 8-pin SOP (150mil) Outline Dimensions Symbol Dimensions in inch Min. Nom. Max. A — 0.236 BSC — B — 0.154 BSC — C 0.012 — 0.020 C′ — 0.193 BSC — D — — 0.069 E — 0.050 BSC — F 0.004 — 0.010 G 0.016 — 0.050 H 0.004 — 0.010 α 0° — 8° Symbol Rev. 1.20 Dimensions in mm Min. Nom. Max. A —F 6.00 BSC — B — 3.90 BSC — C 0.31 — 0.51 C′ — 4.90 BSC — D — — 1.75 E — 1.27 BSC — F 0.10 — 0.25 G 0.40 — 1.27 H 0.10 — 0.25 α 0° — 8° 9 September 10, 2013 HT9291/HT9292/HT9294 14-pin SOP (150mil) Outline Dimensions Symbol A Dimensions in inch Min. Nom. Max. — 0.236 BSC — B — 0.154 BSC — C 0.012 — 0.020 C′ — 0.341 BSC — D — — 0.069 E — 0.050 BSC — F 0.004 — 0.010 G 0.016 — 0.050 H 0.004 — 0.010 α 0° — 8° Symbol Rev. 1.20 Dimensions in mm Min. Nom. Max. — A — 6.00 BSC B — 3.90 BSC — C 0.31 — 0.51 C′ — 8.65 BSC — D — — 1.75 E — 1.27 BSC — F 0.10 — 0.25 G 0.40 — 1.27 H 0.10 — 0.25 α 0° — 8° 10 September 10, 2013 HT9291/HT9292/HT9294 Copyright© 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. 1.20 11 September 10, 2013