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Analog Devices Inc./Maxim Integrated MAX395CWG+
- Part No.:
- MAX395CWG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX395CWG+.pdf
- Description:
- IC SW SPST-NOX8 100OHM 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:109
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Product details
Overview
MAX395CWG+ from Maxim Integrated is an 8-channel, serially controlled, single-pole/single-throw (SPST) analog switch IC with rail-to-rail signal handling, 100Ω max on-resistance at ±5V supplies, 5Ω max channel-to-channel on-resistance match, and <0.1nA off-leakage at +25°C. It serves as a programmable analog signal routing device in data-acquisition front-ends and industrial control I/O modules.
For engineers reviewing the MAX395CWG+ datasheet, MAX395CWG+ pinout, MAX395CWG+ application, or MAX395CWG+ equivalent, key selection criteria include its SPI/QSPI/Microwire-compatible 3-wire interface, daisy-chain capability via DOUT, asynchronous RESET input, dual-supply operation (±2.7V to ±8V), and wide single-supply range (+2.7V to +16V).
Technical Context
The MAX395CWG+ implements an 8-bit shift register driving parallel latches for eight independent SPST switches; data is clocked in synchronously on SCLK rising edge while CS is low, and latch update occurs on CS rising edge. Its CMOS transmission-gate architecture enables bidirectional conduction and rail-to-rail analog voltage support across V− to V+.
Switch control is fully digital: DIN accepts serial command bits (D7–D0), DOUT provides daisy-chain output with 8-cycle delay, and RESET forces all channels OFF and clears the shift register regardless of clock state. Logic thresholds (0.8V/2.4V) ensure TTL/CMOS compatibility with ±5V or +5V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V - ensures minimal signal attenuation and gain error in precision analog paths |
| On-resistance match (∆RON) | 5Ω max between channels - critical for matched gain/phase in multi-channel instrumentation |
| Off-leakage current | 0.1nA at +25°C - preserves high-impedance sensor node integrity and low-offset performance |
| Supply range | ±2.7V to ±8V dual or +2.7V to +16V single - supports legacy ±5V, modern low-voltage, and high-voltage industrial rails |
| Serial interface | SPI/QSPI/Microwire-compatible 3-wire - enables direct connection to microcontroller SPI peripherals without level-shifting |
| Turn-on/off time | 200ns/90ns typical - suitable for multiplexing up to ~1MHz sampling rates in data acquisition |
| ESD protection | >2kV per Method 3015.7 - enhances robustness in field-deployed industrial and avionics systems |
Pinout & Package
MAX395CWG+ is housed in a 24-pin Wide SO (SOIC-W) package with standard 0.300" body width and 0.025" lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCLK) | Serial clock input | Synchronizes DIN data capture on rising edge; defines maximum interface speed (up to 2.1MHz) |
| 2 (V+) | Positive analog supply | Sets upper analog signal limit; must be ≥2.7V above GND or V− in dual-supply mode |
| 3 (DIN) | Serial data input | Accepts 8-bit command word (D7–D0); D7 is MSB and first bit shifted in |
| 4 (GND) | Digital ground reference | Reference for logic inputs only; analog signals are referenced solely to V+ and V− |
| 5–12, 14–20 (NO0–NO7) | Normally open switch terminals | Interchangeable with COMx; either side may serve as input or output in bidirectional signal paths |
| 6–12, 13–19 (COM0–COM7) | Common switch terminals | Paired with corresponding NOx; closed path forms low-impedance connection when enabled |
| 21 (V−) | Negative analog supply | Sets lower analog signal limit; connect to GND for single-supply operation |
| 22 (DOUT) | Serial data output | Shift-register output with 8-bit delay; enables daisy-chaining multiple MAX395CWG+ devices |
| 23 (RESET) | Asynchronous reset input | Active-low; forces all switches OFF and clears internal shift register independently of clock |
| 24 (CS) | Chip-select input | Active-low; enables serial data loading when low; rising edge latches new switch states |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports signals from V− to V+ without clipping-enables full dynamic range use in ±5V, ±3V, or +12V systems |
| 8-bit serial interface with daisy-chain | DOUT output allows cascading multiple devices using one SPI bus-reduces GPIO count and simplifies PCB layout |
| Asynchronous hardware RESET | Guarantees known OFF state at power-up or fault recovery-eliminates need for software initialization sequence |
| Matched on-resistance across channels | ≤5Ω difference ensures consistent gain/attenuation in multi-channel mux or PGA applications |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds work directly with +5V or ±5V logic families-no external level translators required |
| Low charge injection (2pC typ) | Minimizes voltage glitch at switch closure-critical for sample-and-hold and precision ADC driver stages |
Applications
| Industrial Process Monitoring | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs into a shared 24-bit sigma-delta ADC in a PLC analog input module. IC Role / Device Role / Timing Role: 8-channel SPST analog switch providing programmable front-end signal selection with rail-to-rail support for ±10V sensor outputs. Use Value: Enables single-ADC architecture with <0.1nA leakage preserving µV-level resolution and 5Ω RON match minimizing channel-to-channel gain error. | Use Scenario: Routing discrete analog sensor signals (pitot-static, angle-of-attack, cabin pressure) to redundant flight data acquisition units in commercial aircraft. IC Role / Device Role / Timing Role: Serially controlled analog switch delivering ESD-hardened (2kV), low-crosstalk (<−90dB), and fast-switching (200ns) signal path selection. Use Value: Supports DO-160 compliance via >2kV ESD rating and −90dB off-isolation, ensuring signal integrity in high-noise avionics bays. |
| ATE Channel Multiplexing | Audio Test Equipment Switching |
Use Scenario: Configuring test signal paths between DUT ports and measurement instruments (DMM, SMU, scope) in modular ATE rack systems. IC Role / Device Role / Timing Role: Programmable 8×1 analog multiplexer with daisy-chain capability enabling synchronized switching across multiple slots. Use Value: Reduces controller I/O count via serial interface and ensures ≤100Ω RON flatness over ±3V signal range for accurate voltage/current sourcing. | Use Scenario: Selecting between microphone preamp outputs, line-level sources, and DAC outputs in professional audio analyzer hardware. IC Role / Device Role / Timing Role: Low-distortion (THD <0.01% at 1kHz), low-charge-injection analog switch routing audio signals up to 20kHz. Use Value: 2pC charge injection and <−90dB crosstalk prevent audible clicks/pops and preserve stereo separation in test-grade audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX391CNG+ | Quad SPST switch (4 channels); requires two devices to match 8-channel count; identical RON, leakage, and interface | No daisy-chain DOUT; less efficient for large-scale multiplexing; higher board area and BOM count | Select when only 4 channels needed or space-constrained layouts favor smaller SO-16 package |
| ADG708BRUZ | 8-channel SPST with SPI interface but no DOUT daisy-chain; 4Ω RON match; 1nA leakage at +25°C (10× higher) | Lacks asynchronous RESET; single-supply only (+1.8V to +5.5V); not rated for ±8V operation | Prefer for battery-powered portable test gear where low voltage and small 20-TSSOP size outweigh daisy-chain and dual-supply needs |
Compared with MAX395CWG+, MAX391CNG+ offers identical electrical specs per channel but scales poorly beyond 4 channels, while ADG708BRUZ trades daisy-chain flexibility and dual-supply robustness for ultra-low voltage operation and compact packaging-making each suitable only for distinct system constraints.
Availability
MAX395CWG+ is available at Aetrix Electronics and suitable for industrial process monitoring, avionics signal routing, and ATE channel multiplexing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX395CWG+ 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) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX395CWG+ belongs to Maxim's high-performance analog switch product line, engineered for programmable signal routing in noise-sensitive, multi-channel data acquisition and test equipment where rail-to-rail operation, low leakage, and serial configurability are essential.
FAQ
What supply configurations does the MAX395CWG+ support?
The MAX395CWG+ operates with dual supplies from ±2.7V to ±8V or a single supply from +2.7V to +16V. In single-supply mode, V− is tied to GND. This flexibility allows use in legacy ±5V systems, modern low-voltage industrial controllers, and high-voltage sensor interfaces-all while maintaining rail-to-rail analog signal handling from V− to V+.
How does the MAX395CWG+ enable daisy-chaining of multiple devices?
The MAX395CWG+ uses its DOUT pin to output the DIN data stream delayed by eight clock cycles. By connecting DOUT of one device to DIN of the next, and tying all CS and SCLK lines together, a single SPI master can program multiple MAX395CWG+ units in series. On the rising edge of CS, all devices simultaneously update their switch states-ensuring synchronized routing across channels.
What is the function of the RESET pin on the MAX395CWG+?
The RESET pin on the MAX395CWG+ is an asynchronous active-low input that forces all eight switches to the OFF state and clears the internal 8-bit shift register to zero-regardless of SCLK or CS state. This provides deterministic power-up behavior and rapid fault recovery without requiring a full serial reconfiguration sequence.
Can the MAX395CWG+ be used as an 8:1 analog multiplexer?
Yes, the MAX395CWG+ can be configured as an 8:1 multiplexer by connecting all COM0–COM7 pins together as the common output node and using NO0–NO7 as individual input channels. Programming one bit high in the 8-bit serial command selects the corresponding NOx input to connect to the shared COM bus-enabling flexible, software-controlled signal routing.
What is the maximum guaranteed on-resistance flatness for the MAX395CWG+?
The MAX395CWG+ guarantees 10Ω max on-resistance flatness over the specified analog signal range (e.g., ±3V at ±5V supplies). Flatness is defined as the difference between maximum and minimum RON measured across the full signal swing-ensuring consistent insertion loss and minimal distortion for AC signals within that range.
MAX395CWG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 8
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 5Ohm (Max)
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 400ns, 400ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
MAX395CWG+ FAQ
1.How can I place an order for MAX395CWG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX395CWG+ 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 MAX395CWG+ reliable?
The price and inventory of MAX395CWG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX395CWG+ is usually 5 days.
3.What payment methods are accepted for MAX395CWG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX395CWG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX395CWG+?
MAX395CWG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX395CWG+ 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 MAX395CWG+?
For technical support, including MAX395CWG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX395CWG+ requirements.
6.How does Aetrix verify that MAX395CWG+ is sourced from the original manufacturer or authorized distributors?
All MAX395CWG+ 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 MAX395CWG+ meets industry standards.
7.What is the process for return or replacement of MAX395CWG+?
All MAX395CWG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX395CWG+, 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 MAX395CWG+ part is unused and in its original packaging.
Return procedure for MAX395CWG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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