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DG445DY
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Product Detailed Parameters
- Description：IC SWITCH SPST-NOX4 85OHM 16SOIC
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tube
- Switch Circuit：SPST - NO
- Multiplexer/Demultiplexer Circuit：1:01
- On-State Resistance (Max)：85Ohm
- Channel-to-Channel Matching (ΔRon)：4Ohm (Max)
- Voltage - Supply, Single (V+)：10V ~ 30V
- Voltage - Supply, Dual (V±)：±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max)：250ns, 170ns
- -3db Bandwidth：-
- Charge Injection：5pC
- Channel Capacitance (CS(off), CD(off))：4pF, 4pF
- Current - Leakage (IS(off)) (Max)：500pA
- Crosstalk：-100dB @ 1MHz
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SOIC
- Number of Circuits：4
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Overview
The DG445DY is a monolithic CMOS analog switch featuring four independent single-pole/single-throw (SPST) normally open channels in a 16-pin Narrow SOIC package. It operates from a single +10V to +30V supply or bipolar ±4.5V to ±20V supplies. Key electrical parameters include a maximum on-resistance of 85Ω, an on-resistance match between channels of 4Ω max, and guaranteed on-resistance flatness of 9Ω max over the signal range. The device offers fast switching times with a maximum turn-on time of 250ns and a maximum turn-off time of 70ns. It features low charge injection of 10pC max, low power consumption of 35µW max, and high electrostatic discharge tolerance of 2000V min per Method 3015.7.
Feature Summary
- Four independent SPST normally open analog switches
- Improved on-resistance matching and flatness
- Low charge injection for sample-and-hold applications
- TTL and CMOS logic compatible inputs
Applications
- Sample-and-Hold Circuits
- Test Equipment
- Audio Signal Routing
- Communication Systems
Procurement Notes
Verify the specific ordering suffix 'DY' corresponds to the 16-pin Narrow SOIC package and the -40°C to +85°C industrial temperature range as defined in the manufacturer's documentation. Confirm RoHS compliance status and lead-free availability through official distributor channels before finalizing procurement plans.
Selection Notes
Select this component when normally open switch configuration is required. Ensure the bipolar supply voltage range of ±4.5V to ±20V aligns with system requirements. Consider the 85Ω maximum on-resistance and 250ns switching speed for signal integrity and timing constraints in the design.
Part Context
The DG445DY belongs to the DG444/DG445 series of improved quad SPST analog switches. It serves as a drop-in replacement for older DG211 and DG212 devices, offering enhanced performance characteristics such as lower charge injection and faster switching speeds while maintaining compatibility with standard digital logic levels.
Replacement Considerations
DG444DY is a functional substitute differing only in switch polarity (normally closed vs. normally open). Verify logic level inversion requirements when substituting between DG444 and DG445 variants.
