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Analog Devices Inc./Maxim Integrated DG408CY
- Part No.:
- DG408CY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG408CY.pdf
- Description:
- IC MUX 8:1 100OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
DG408CY from Maxim Integrated is a precision 1-of-8 CMOS analog multiplexer/demultiplexer designed for bidirectional signal routing in precision data-acquisition and test systems. It features guaranteed 100Ω max on-resistance, 8Ω max channel-to-channel matching, 15pC max charge injection, rail-to-rail analog signal handling (±20V dual / +30V single supply), and TTL/CMOS-compatible digital control. Used in sample-and-hold circuits where low distortion and minimal switching transients are critical.
For engineers reviewing the DG408CY datasheet, DG408CY pinout, DG408CY application, or DG408CY equivalent, this page delivers verified electrical parameters, package-specific thermal derating, enable timing behavior, leakage performance at +85°C, and direct alternatives with documented functional trade-offs.
Technical Context
The DG408CY implements an 8-channel analog switch matrix controlled by three address bits (A0–A2) and an active-low enable (EN), with CMOS decoding logic selecting exactly one of eight bidirectional Sx-to-D paths. All switches conduct equally in both directions and maintain consistent rDS(ON) across the full ±10V analog range under ±15V supplies.
Its architecture guarantees monotonic on-resistance flatness (9Ω max variation), tightly matched channel resistance (8Ω max mismatch), and low off-capacitance (CD(OFF) = 26pF, CS(OFF) = 3pF) to minimize crosstalk (-92dB) and isolation degradation (-75dB) at 100kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (rDS(ON)) | 100Ω max at TA = +25°C, V+ = ±15V - ensures minimal signal attenuation and gain error in precision gain-setting paths. |
| On-Resistance Matching | 8Ω max between any two channels - enables accurate differential signal routing without channel-induced offset drift. |
| Charge Injection | 15pC max - limits voltage glitch on sample capacitors in S/H circuits to <1.5mV with 10nF hold cap. |
| Analog Signal Range | ±20V (dual), +30V (single) - supports industrial sensor inputs and actuator drive signals without external level-shifting. |
| Input Off-Leakage Current | 5nA max at +85°C - preserves high-impedance node integrity in 16-bit ADC front-ends over temperature. |
| Enable Turn-On Time | 150ns max (tON(EN)) - allows sub-microsecond channel selection in high-throughput DAQ systems. |
| ESD Protection | >2000V per MIL-STD-883 Method 3015.7 - withstands handling and board-level ESD events without latch-up. |
Pinout & Package
DG408CY is supplied in a 16-pin narrow SOIC (Small Outline Integrated Circuit) package with 1.27mm pitch, 8.65mm × 3.9mm body, and 696mW max power dissipation at +70°C (derates 8.70mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 | A0, A1, A2 | Binary address inputs selecting one of eight analog channels; TTL/CMOS compatible (VAL ≤ 0.8V, VAH ≥ 2.4V). |
| 2 | EN | Active-low enable controlling all switches; when high, all channels are open-circuit (high-Z). |
| 3 | V− | Negative supply rail; must be connected for dual-supply operation or tied to GND for single-supply use. |
| 4–7, 9–12 | S1–S4, S5–S8 | Bidirectional analog input terminals; each connects to D when selected, with symmetric on-resistance. |
| 8 | D | Common bidirectional analog output/input terminal shared across all eight channels. |
| 13 | V+ | Positive supply rail; supports +5V to +30V single or ±5V to ±20V dual supply configurations. |
| 14 | GND | Ground reference for logic inputs and internal biasing; separate from analog signal ground in mixed-signal layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping-critical for ±10V sensor interfaces and DAC outputs. |
| Guaranteed channel matching | 8Ω max rDS(ON) mismatch enables precise ratio-metric measurements in multi-channel thermocouple or RTD scanners. |
| Low charge injection (15pC) | Reduces hold-mode settling error in 16-bit+ S/H circuits, eliminating need for post-switching correction algorithms. |
| TTL/CMOS-compatible control | Direct interface with microcontrollers and FPGAs without level translators-simplifies PCB layout and BOM. |
| High off-isolation (−75dB) | Minimizes signal bleed-through between unselected channels in high-density test fixture routing matrices. |
Applications
| Sample-and-Hold Circuits | Test Equipment |
|---|---|
Use Scenario: Multiplexing multiple sensor outputs into a single high-resolution ADC with hold capacitor. IC Role / Device Role / Timing Role: Analog switch enabling sequential sampling while maintaining signal integrity during acquisition phase. Use Value: 15pC max charge injection prevents hold-capacitor voltage step errors exceeding 1 LSB in 16-bit systems with 10nF caps. |
Use Scenario: Automated test fixture routing analog stimulus and response paths across DUT pins. IC Role / Device Role / Timing Role: Precision signal path selector with guaranteed channel matching for calibration traceability. Use Value: 8Ω max rDS(ON) matching ensures measurement repeatability across channels without per-path compensation. |
| Guidance and Control Systems | Communications Systems |
Use Scenario: Routing feedback signals from multiple inertial sensors (gyros, accelerometers) to a central controller. IC Role / Device Role / Timing Role: High-reliability analog MUX operating over extended temperature range with low leakage. Use Value: 5nA max input off-leakage at +85°C preserves signal fidelity in high-impedance feedback loops of servo amplifiers. |
Use Scenario: Dynamic routing of audio or IF signals in software-defined radio front-ends. IC Role / Device Role / Timing Role: Low-crosstalk (−92dB) analog switch enabling simultaneous transmit/receive path isolation. Use Value: 26pF drain-off capacitance minimizes RF coupling between adjacent channels in multi-band receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG408BRZ | 100Ω typical rDS(ON), but only 25Ω max matching (vs. DG408CY's 8Ω); 20pC charge injection (vs. 15pC). | Higher channel mismatch increases differential nonlinearity in precision metrology; less suitable for ratiometric bridge sensing. | Select DG408CY when channel matching <10Ω and charge injection <16pC are required for 16-bit+ accuracy. |
| MAX4617ESE+ | Lower 60Ω max rDS(ON), but only single-supply rated (+5V to +36V); no dual-supply support or guaranteed matching spec. | Cannot replace DG408CY in ±15V industrial sensor interfaces or legacy dual-rail systems without redesign. | Choose MAX4617ESE+ only for new single-supply designs prioritizing on-resistance over matching and bipolar operation. |
Compared with ADG408BRZ and MAX4617ESE+, the DG408CY uniquely delivers guaranteed 8Ω channel matching and dual-supply operation within a narrow SO package-making it the only drop-in solution for legacy DG408-based systems requiring validated performance over temperature.
Availability
DG408CY is available at Aetrix Electronics and suitable for precision data-acquisition systems, automated test equipment, and aerospace guidance subsystems requiring stable component supply across extended production lifecycles.
Supply support for DG408CY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The DG408CY belongs to Maxim's legacy high-precision analog switch family, engineered specifically for applications demanding guaranteed matching, low charge injection, and robust operation across military-grade temperature ranges.
FAQ
What is the maximum allowable supply voltage for DG408CY in dual-supply mode?
The DG408CY supports dual-supply operation from ±5V to ±20V. Its absolute maximum rating specifies V+ up to 44V referenced to V−, but functional operation is guaranteed only within the ±5V to ±20V range. Exceeding ±20V risks violating the specified on-resistance flatness and leakage performance, and may trigger internal clamp diode conduction.
Does DG408CY support single-supply operation, and what is its analog signal range in that configuration?
Yes, DG408CY operates with a single +5V to +30V supply by connecting V− to GND. In this mode, the analog signal range extends from 0V to V+, supporting rail-to-rail input/output. For example, with +12V supply, signals from 0V to +12V are fully supported without clipping or distortion.
What is the guaranteed on-resistance flatness specification for DG408CY, and why does it matter?
DG408CY guarantees 9Ω max on-resistance flatness-the difference between maximum and minimum rDS(ON) measured across the full analog signal range. This ensures consistent gain and linearity when routing varying-amplitude signals (e.g., ±10V sensor outputs), preventing amplitude-dependent distortion in precision instrumentation amplifiers.
How does the enable pin (EN) function in DG408CY, and what is its timing behavior?
The EN pin is active-low: when logic high, all eight switches are disabled (high-impedance state); when logic low, channel selection via A0–A2 becomes active. DG408CY guarantees tON(EN) ≤ 150ns and tOFF(EN) ≤ 300ns (at V+ = ±15V), enabling fast channel reconfiguration in time-critical DAQ systems without introducing measurable switching delay jitter.
Is DG408CY pin-compatible with the original industry-standard DG408, and what improvements does it offer?
Yes, DG408CY is a pin-compatible plug-in upgrade for the legacy DG408. Key improvements include guaranteed 8Ω channel matching (vs. unspecified in original), 9Ω max on-resistance flatness (vs. unguaranteed), 15pC max charge injection (vs. 25pC typical), and enhanced ESD protection (>2000V vs. unspecified). No PCB changes are required for migration.
DG408CY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.5Ohm
- Voltage - Supply, Single (V+):
- 5V ~ 30V
- Voltage - Supply, Dual (V±):
- ±5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 150ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 3pF, 26pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -92dB @ 100kHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG408CY FAQ
1.How can I place an order for DG408CY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG408CY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DG408CY reliable?
The price and inventory of DG408CY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG408CY is usually 5 days.
3.What payment methods are accepted for DG408CY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG408CY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG408CY?
DG408CY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG408CY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DG408CY?
For technical support, including DG408CY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG408CY requirements.
6.How does Aetrix verify that DG408CY is sourced from the original manufacturer or authorized distributors?
All DG408CY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DG408CY meets industry standards.
7.What is the process for return or replacement of DG408CY?
All DG408CY units undergo pre-shipment inspection (PSI). If there is an issue with DG408CY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DG408CY part is unused and in its original packaging.
Return procedure for DG408CY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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