DG425CY - 16-Pin CMOS Latching Analog Switch | Analog Devices
MPN: DG425CY ✓ فعالDG425CY جائزہ
An analog switch is a semiconductor device that routes electrical signals between input and output terminals under digital control. The DG425 belongs to the broader CMOS switch and multiplexer hierarchy, where multiplexer and demultiplexer functions determine which signal paths are connected. Its integrated latch retains the control state, reducing the need for continuously maintained control signals and helping lower system power consumption. The DG425 family also supports bidirectional signal conduction, allowing the selected paths to carry signals in either direction.
The redesigned DG421, DG423, and DG425 devices provide guaranteed matching and flatness, making channel behavior more predictable than an unqualified resistance specification alone. The DG425CY combines these switch characteristics with a maximum charge injection of 15 pC and an ESD tolerance of at least 2000 V per Method 3015.7. These characteristics make the device useful where switching transients, channel mismatch, or ESD exposure could affect signal integrity.
The CMOS implementation supports operation from dual supplies, including a -15 V to +20 V total supply span in the cited DG425CY-T technical data. Switching timing data cited for that ordering variant includes approximately 250 ns turn-on and 200 ns turn-off. Because DG425CY is a specific package and temperature-ordering variant of the DG425 family, engineers should verify the complete ordering code, supply limits, control logic, and electrical limits against the manufacturer datasheet before production release.
Typical uses include battery-powered instrumentation, test-equipment signal routing, data-acquisition systems, communication equipment, and analog measurement circuits. The latching control is particularly useful when a selected measurement path must remain connected while the host processor sleeps. The device can also serve in circuits requiring a pair of independently latched double-pole paths for source, range, or channel selection.
The principal design consideration is maintaining adequate logic-level compatibility across the complete supply range. Because control thresholds can change with VDD and VSS, external logic should not be assumed to remain compatible throughout every operating condition. PCB layout should keep analog traces short, provide a stable ground reference, and place bypass capacitors close to the supply pins. Designers should also evaluate injected charge against the input impedance and acquisition bandwidth of the downstream circuit.
This page consolidates the verified manufacturer and distributor information for DG425CY with package details, application guidance, lifecycle considerations, and replacement qualification notes. It is intended to help engineers distinguish a true same-footprint replacement from a related family member whose latch configuration, temperature grade, package code, or electrical limits differ.
کے لیے ڈراپ اِن متبادل DG425CY — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس پروڈکٹ کے لیے کوئی ڈراپ اِن متبادل دستیاب نہیں۔
متبادل کی درخواست کریںDG425CY زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Switch Type | Dual DPST analog switch |
| On-Resistance | 20 Ω typical |
| On-Resistance Matching | 3 Ω maximum |
| On-Resistance Flatness | 4 Ω maximum over the signal range |
| Charge Injection | 15 pC maximum |
| ESD Tolerance | 2000 V minimum per Method 3015.7 |
| Supply Voltage Span | -15 V to +20 V |
| Turn-On Time | 250 ns typical for DG425CY-T data |
| Turn-Off Time | 200 ns typical for DG425CY-T data |
| Signal Conduction | Bidirectional |
| Control | Latched CMOS control |
| پیکیج | 16-pin SOIC |
| ماؤنٹنگ ٹائپ | Surface mount |
| آپریٹنگ درجہ حرارت | 0 °C to 70 °C for the cited DG425CY-T ordering data |
| Logic Family | CMOS |
DG425CY 16-pin soic پن کنفیگریشن گائیڈ
DG425CY (16-pin soic پیکیج) کے لیے پن کنفیگریشن۔ پن نمبرنگ، فنکشنز اور کنکشن ڈایاگرامز مینوفیکچرر کے ڈیٹا شیٹ میں بیان کیے گئے ہیں۔ درست فٹ پرنٹ اور سولڈرنگ رہنما ہدایات کے لیے اسی سے رجوع کریں۔
کے لیے تفصیلی پن آؤٹ ڈیٹا دستیاب نہیں DG425CY.
رجوع کریں ڈیٹا شیٹ مکمل پن کنفیگریشن کے لیے۔
عام استعمالات
DG425CY کے لیے موزوں ہے 6 ایپلیکیشنs: Battery-Powered Data Acquisition, Precision Test and Measurement, Analog Signal Multiplexing, Communication Signal Routing, Industrial Control Signal Isolation, Automotive and Safety-Critical Diagnostic Circuits.
Battery-Powered Data Acquisition
The DG425CY fits battery-powered acquisition systems that must retain a selected analog path while the controller reduces its activity. Its latched control avoids continuously driving the switch command, while the 20 Ω typical on-resistance provides a defined signal-path resistance. The 15 pC maximum charge injection is especially relevant when a source drives a relatively high-impedance sampling network. Designers should still compare this transient against the ADC input capacitance and acquisition timing. Because no drop-in replacement was verified, DG425CY should remain a controlled BOM item with an approved manufacturer source.
تجویز کردہ
Precision Test and Measurement
DG425CY is appropriate for precision test equipment that routes two related analog nodes through latched switches. Guaranteed on-resistance matching of 3 Ω maximum and flatness of 4 Ω maximum can reduce channel-dependent error when the same source is presented through different paths. The bidirectional conduction characteristic supports signal reversal in source-and-measure arrangements. At 20 Ω typical on-resistance, the device should be included in the total source impedance and noise-gain calculations. The 15 pC maximum charge injection also requires settling-time analysis before a precision measurement is taken.
تجویز کردہ
Analog Signal Multiplexing
The DG425CY can support latched routing in compact analog multiplexing systems where the selected channel must remain stable during conversion or acquisition. Its dual DPST organization provides paired switching capability, while the latched control reduces command-state overhead in multi-rail or power-managed instruments. The specified 20 Ω typical on-resistance should be included when calculating divider ratios and sensor excitation paths. Likewise, the 15 pC maximum charge injection is relevant for high-impedance sensors because the resulting transient may require a dedicated acquisition delay.
تجویز کردہ
Communication Signal Routing
DG425CY can be used in communication modules for controlled routing of low-frequency or control signals, particularly where a latched path helps minimize switching-command overhead. Bidirectional conduction allows the same device arrangement to support transmit, receive, or test routing. The on-resistance matching guarantee of 3 Ω maximum may assist channel-balanced measurements, although it does not by itself establish high-frequency return loss. Board layout, connector protection, supply bypassing, and the signal amplitude relative to the absolute maximum ratings remain essential engineering checks.
تجویز کردہ
Industrial Control Signal Isolation
The DG425CY is suitable for routing control or measurement signals in industrial equipment where a latched configuration can simplify controller behavior across long operating intervals. Its CMOS construction and bidirectional path support signal-routing architectures that need independent selection of two-pole paths. Flatness of 4 Ω maximum helps maintain more consistent path resistance across the working signal range, while the 20 Ω typical value must be checked against circuit impedance. Industrial deployment additionally requires attention to ESD, supply transients, temperature limits, and the fact that the verified ordering data specifies a commercial temperature range.
تجویز کردہ
Automotive and Safety-Critical Diagnostic Circuits
DG425CY may be considered for low-voltage diagnostic or signal-routing sections of automotive and safety-related equipment, but the supplied DG425CY ordering data identifies a 0 °C to 70 °C commercial range. This makes direct use questionable where extended ambient temperatures are required. Its 2000 V minimum ESD tolerance and latched dual DPST configuration can still be useful in controlled diagnostic subsystems. Engineers should select an explicitly temperature- and automotive-qualified ordering variant, verify all absolute maximum ratings, and avoid assuming that the commercial DG425CY is AEC-Q100 qualified.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا DG425CY — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
اہم امتیازی خصوصیات
- Guaranteed channel resistance matching (بمقابلہUnqualified generic CMOS switch)
- Low charge injection for latched routing (بمقابلہUnqualified generic CMOS switch)
- Guaranteed resistance flatness (بمقابلہSwitch specified only by typical resistance)
ڈیزائن نوٹس
Confirm the exact supply configuration and logic thresholds from the ordering-specific DG425CY datasheet before connecting control signals. The verified DG425CY-T data gives a -15 V to +20 V supply span, but that range alone does not guarantee that every host logic level is accepted throughout the span. Evaluate input thresholds at the minimum, nominal, and maximum supply conditions, and include the latch state in power-up and power-down sequencing so the analog path does not change unexpectedly.
Include the 20 Ω typical on-resistance and the associated capacitance when calculating settling time and signal attenuation. For high-impedance sources, the 15 pC maximum charge injection can create a temporary voltage step; increase the acquisition delay or add a suitable acquisition capacitor only after checking stability and recovery time. Use matched routing where possible because the family guarantees 3 Ω maximum matching but does not eliminate channel-dependent errors elsewhere in the signal chain.
Place supply bypass capacitors close to the device's supply pins and provide a low-impedance ground reference beneath the routing area. Keep switched analog traces short and away from fast digital edges to limit capacitive coupling. Because the verified excerpts do not provide the pin diagram, confirm pin numbering and exposed routing requirements from the official package drawing before layout release; do not derive a footprint from the 16-pin SOIC label alone.
Do not treat DG421, DG423, or another DG425 ordering suffix as an automatic DG425CY replacement. The related family can differ in channel count, latch behavior, package code, temperature grade, and pin configuration. A valid substitution requires an exact pin comparison, compatible supply and logic levels, acceptable on-resistance and charge-injection limits, and confirmation of operating temperature. The supplied cross-reference results did not establish a qualified drop-in alternative.
تعمیل کی معلومات
The supplied sources do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for DG425CY. ESD tolerance of 2000 V minimum per Method 3015.7 is a device specification, not a material-compliance certification.