NTE922, NTE922M, & NTE922SM Integrated Circuit Voltage Comparator Description: The NTE922, NTE922M, and NTE922SM are voltage comparators that have input currents nearly a thousand times lower than devices like the NTE910 or NTE910D. They are also designed to operate over a wider range of supply voltages: from standard ±15V op amp supplies down to the single 5V supply used for IC logic. Their output is compatible with RTL, DTL and TTL as well as MOS circuits. Further, they can drive lamps or relays, switching voltages up to 50V at currents as high as 50mA. Both the input and the output of these devices can be isolated from system ground, and the output can drive loads referred to ground, the positive supply or the negative supply. Offset balancing and strobe capability are provided and outputs can be wire OR’ed. Although slower than the NTE910 and NTE910D (200ns response time vs 40ns) the devices are also much less prone to spurious oscillations. Features: D Operates from single 5V supply D Input current: 150nA max. over temperature D Offset current: 20nA max. over temperature D Differential input voltage range: ±30V D Power consumption: 135mW at ± 15V D Available in 3 Different Case Styles: 8–Lead Metal Can: NTE922 8–Lead Mini DIP: NTE922M 8–Lead SOIC (Surface Mount): NTE922SM Absolute Maximum Ratings: Total Supply Voltage (V84) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V Output to Negative Supply Voltage (V74) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Ground to Negative Supply Voltage (V14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±30V Input Voltage (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V Power Dissipation (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW Note 1. This rating applied for ±15V supplies. The positive input voltage limit is 30V above the negative supply. The negative input voltage limit is equal to the negative supply voltage or 30V below the positive supply, whichever is less. Note 2. The maximum junction temperature is 110°C. For operating at elevated temperature, the NTE922 must be derated based on a thermal resistance of 150°C/W, junction–to–ambient, or 45°C/W, junction–to–case. The thermal resistance of the NTE922M and the NTE922SM is 100°C/W, junction–to–ambient. Absolute Maximum Ratings (Cont’d): Output Short Circuit Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10sec Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (During Soldering, 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C Voltage at Strobe Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ –5V Electrical Characteristics: (Note 3) Parameter Test Conditions Min Typ Max Unit Input Offset Voltage TA = +25°C, RS ≤ 50k, Note 4 – 2.0 7.5 mV Input Offset Current TA = +25°C, Note 4 – 6.0 50 nA Input Bias Current TA = +25°C – 100 250 nA Voltage Gain TA = +25°C 40 200 – V/mV Response Time TA = +25°C, Note 5 – 200 – ns Saturation Voltage VIN ≤ –10mV, IOUT = 50mA, TA = +25°C – 0.75 1.5 V Strobe ON Current TA = +25°C 1.5 3.0 – mA Output Leakage Current VIN ≥ 10mV, VOUT = 35V TA = +25°C, ISTROBE = 3mA, V– = VGRND = –5V – 0.2 59 nA Input Offset Voltage RS ≤ 50K, Note 4 – – 10 mV Input Offset Current Note 4 – – 70 nA – – 300 nA –14.5 13.8,–14.7 13.0 V Input Bias Current Input Voltage Range Saturation Voltage V+ ≥ 4.5V, V– = 0, VIN ≤ –10mV, ISINK ≤ 8mA – 0.23 0.4 V Positive Supply Current TA = +25°C – 5.1 7.5 mA Negative Supply Current TA = +25°C – 4.1 5.0 mA Note 3. These specifications apply for VS = ±15V and the Ground pin at GND, and 0°C < TA < +70°C, unless otherwise specified. The offset voltage, offset current and bias current specifications apply for any supply voltage from a single 5V supply up to ± 15V supplies. Note 4. The offset voltages and offset currents given are the maximum values required to drive the output within a volt of either supply with 1mA load. Thus, these parameters define an error band and take into account the worst–case effects of voltage gain and input impedance. Note 5. Do not short the strobe pin to ground: it should be current driven at 3 to 5mA. Pin Connection Diagram NTE922 (Top View) NTE922M NTE9122SM Input Offset Input Offset/ Strobe Output V (+) 5 6 4 V (–) GND 1 8 V (+) Non–Invert Input 2 7 Output Invert Input 3 6 Input Offset/ Strobe V (–) 4 5 Input Offset 3 Invert Input 7 2 8 Non–Invert Input 1 GND NTE922 .370 (9.39) Dia Max .335 (8.52) Dia Max .177 (4.5) Max .492 (12.5) Min .018 (0.45) Dia Typ 3 2 4 1 5 8 45° 7 6 .032 (0.82) .200 (5.06) Dia NTE922M 8 5 .256 (6.52) Max 1 4 .393 (10.0) Max .300 (7.62) .150 (3.81) .100 (2.54) .070 (1.77) Min .300 (7.62) NTE922SM .192 (4.9) 8 1 5 4 .050 (1.27) .236 (5.99) .154 (3.91) 016 (.406) 061 (1.53) .006 (.152) NOTE: Pin1 on Beveled Edge .198 (5.03)