AD790JNZ

Fast, Precision a Comparator AD790 CONNECTION DIAGRAMS FEATURES 8-Pin Plastic Mini-DIP (N) 45 ns max Propagation Delay and Cerdip (Q) Packages Single 5 V or Dual 15 V Supply Operation CMOS or TTL Compatible Output 250 V max Input Offset Voltage +V 500 V max Input Hysteresis Voltage S 1 8 V LOGIC AD790 15 V max Differential Input Voltage +IN OUTPUT 2 7 + Onboard Latch IN 60 mW Power Dissipation 3 6 GROUND Available in 8-Pin Plastic and Hermetic Cerdip V 45 LATCH S Packages Available in Tape and Reel in Accordance with EIA-481A Standard 8-Pin SOIC (R) Package APPLICATIONS Zero-Crossing Detectors 1 GROUND OUTPUT 8 Overvoltage Detectors AD790 Pulse-Width Modulators 7 2 LATCH V LOGIC Precision Rectifiers V 3 6 Discrete A/D Converters S +V S Delta-Sigma Modulator A/Ds 4 +IN 5 IN PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS The AD790 is a fast (45 ns), precise voltage comparator, with a 1. The AD790s combination of speed, precision, versatility number of features that make it exceptionally versatile and easy and low cost makes it suitable as a general purpose compara- to use. The AD790 may operate from either a single 5 V supply tor in analog signal processing and data acquisition systems. or a dual 15 V supply. In the single-supply mode, the AD790s 2. Built-in hysteresis and a low-glitch output stage minimize the inputs may be referred to ground, a feature not found in other chance of unwanted oscillations, making the AD790 easier to comparators. In the dual-supply mode it has the unique ability use than standard open-loop comparators. of handling a maximum differential voltage of 15 V across its in- 3. The hysteresis combined with a wide input voltage range put terminals, easing their interfacing to large amplitude and enables the AD790 to respond to both slow, low level (e.g., dynamic signals. 10 mV) signals and fast, large amplitude (e.g., 10 V) signals. This device is fabricated using Analog Devices Complementary 4. A wide variety of supply voltages is acceptable for operation Bipolar (CB) processwhich gives the AD790s combination of the AD790, ranging from single 5 V to dual +5 V/12 V, of fast response time and outstanding input voltage resolution 5 V, or +5 V/15 V supplies. (1 mV max). To preserve its speed and accuracy, the AD790 incorporates a low glitch output stage that does not exhibit 5. The AD790s power dissipation is the lowest of any compara- the large current spikes normally found in TTL or CMOS output tor in its speed range. stages. Its controlled switching reduces power supply disturbances 6. The AD790s output swing is symmetric between V LOGIC that can feed back to the input and cause undesired oscillations. and ground, thus providing a predictable output under a The AD790 also has a latching function which makes it suitable wide range of input and output conditions. for applications requiring synchronous operation. The AD790 is available in five performance grades. The AD790J and the AD790K are rated over the commercial tem- perature range of 0C to 70C. The AD790A and AD790B are rated over the industrial temperature range of 40C to +85C. The AD790S is rated over the military temperature range of 55C to +125C. E REV. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise Tel: 781/329-4700 www.analog.com under any patent or patent rights of Analog Devices. 781/461-3113 2014 Fax: Analog Devices, Inc., +AD790SPECIFICATIONS (Operation 25 C and +V = 15 V, V = 15 V, V = 5 V unless otherwise noted.) DUAL SUPPLY S S LOGIC AD790J/A AD790K/B AD790S Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Unit RESPONSE CHARACTERISTIC 100 mV Step Propagation Delay, t 5 mV Overdrive 40 45 40 45 40 45 ns PD T to T 45/50 45/50 60 ns MIN MAX OUTPUT CHARACTERISTICS Output HIGH Voltage, V 1.6 mA Source 4.65 4.65 4.65 OH 6.4 mA Source 4.3 4.45 4.3 4.45 4.3 4.45 V T to T 4.3/4.3 4.3 4.3 V MIN MAX Output LOW Voltage, V 1.6 mA Sink 0.35 0.35 0.35 V OL 6.4 mA Sink 0.44 0.5 0.44 0.5 0.44 0.5 V T to T 0.5/0.5 0.5 0.5 V MIN MAX INPUT CHARACTERISTICS 1 0.2 1.0 0.05 0.25 0.2 1.0 mV Offset Voltage T to T 1.5 0.5 1.5 mV MIN MAX 2 Hysteresis T to T 0.3 0.4 0.6 0.3 0.4 0.5 0.3 0.4 0.65 mV MIN MAX Bias Current Either Input 2.5 5 1.8 3.5 2.5 5 A T to T 6.5 4.5 7 A MIN MAX Offset Current 0.04 0.25 0.02 0.15 0.04 0.25 A to T 0.3 0.2 0.4 A T MIN MAX Power Supply Rejection Ratio DC V 20% 80 90 88 100 80 90 dB S to T 76 88 85 93 76 85 dB T MIN MAX Input Voltage Range Differential Voltage V 15 V V V V V S S S S +V 2 V V +V 2 V V +V 2 V V Common Mode V S S S S S S Common Mode Rejection Ratio 10 V<V 80 95 88 105 80 95 dB CM <+10 V T to T 76 90 85 100 76 88 dB MIN MAX Input Impedance 20 220 220 2M pF LATCH CHARACTERISTICS Latch Hold Time, t 25 35 25 35 25 35 ns H Latch Setup Time, t 510 510 510 ns S LOW Input Level, V T to T 0.8 0.8 0.8 V IL MIN MAX HIGH Input Level, V T to T 1.6 1.6 1.6 V IH MIN MA X Latch Input Current 2.3 5 2.3 3.5 2.3 5 A T to T 7 58 A MIN MAX SUPPLY CHARACTERISTICS 3 Diff Supply Voltage V = 5 V LOGIC T to T 4.5 33 4.5 33 4.7 33 V MIN MAX Logic Supply T to T 4.0 7 4.0 7 4.2 7 V MIN MAX Quiescent Current +V +V = 15 V 8 10 8 10 8 10 mA S S V V = 15 V 4 5 4 5 4 5 mA S S V V = 5 V 2 3.3 2 3.3 2 3.3 mA LOGIC LOGIC Power Dissipation 242 242 242 mW TEMPERATURE RANGE Rated Performance T to T 0 to 70/40 to +85 0 to 70/40 to +85 55 to +125 C MIN MAX NOTES 1 Defined as the average of the input voltages at the low to high and high to low transition points. Refer to Figure 6. 2 Defined as half the magnitude between the input voltages at the low to high and high to low transition points. Refer to Figure 6. 3 +V must be no lower than (V 0.5 V) in any supply operating conditions, except during power up. S LOGIC All min and max specifications are guaranteed. Specifications shown in boldface are tested on all production units at final test. Specifications subject to change without notice. E 2 REV.