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Analog Devices Inc./Maxim Integrated MAX350CAP
- Part No.:
- MAX350CAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX350CAP.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,615
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Product details
Overview
MAX350CAP from Maxim Integrated is a dual 4-channel serially controlled analog multiplexer with bidirectional signal routing, 100Ω max on-resistance (±5V supplies), ±2.7V to ±8V dual or +2.7V to +16V single supply operation, and rail-to-rail analog signal handling - used in industrial process control systems for flexible sensor/actuator signal switching.
For engineers reviewing the MAX350CAP datasheet, MAX350CAP pinout, MAX350CAP application, or MAX350CAP equivalent, key selection considerations include its SPI/QSPI/MICROWIRE-compatible 3-wire interface, daisy-chain capability, 0.1nA off-leakage at +25°C, break-before-make timing, and 20-pin SSOP package with dual independent 4-to-1 mux sections.
Technical Context
The MAX350CAP implements two independent 4-to-1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B) controlled via an 8-bit shift register updated on the rising edge of CS. Its CMOS switch architecture supports bidirectional rail-to-rail signal flow with matched on-resistance (≤16Ω) and flat on-resistance (≤10Ω) over the full analog range.
Serial communication uses a synchronous 3-wire interface (DIN/SCLK/CS) compatible with SPI (CPOL=0), QSPI, and MICROWIRE standards; DOUT enables daisy-chaining multiple devices. Asynchronous RESET forces all switches OFF and clears the shift register to zero.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Configuration | Dual independent 4-to-1 SPST analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B) |
| On-Resistance (max) | 100Ω at ±5V supplies - ensures minimal signal attenuation and gain error in precision analog paths |
| On-Resistance Match | ≤16Ω between channels - critical for matched gain/phase in differential or multi-channel sampling |
| Off-Leakage Current | 0.1nA at +25°C - preserves accuracy in high-impedance sensor interfaces and sample-hold circuits |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - supports wide-range industrial and automotive signal conditioning |
| Logic Compatibility | TTL/CMOS thresholds (0.8V/2.4V) with ±5V or +5V supplies - simplifies interfacing with legacy microcontrollers |
| ESD Protection | >2kV per Method 3015.7 - enhances robustness in factory-floor and field-deployed equipment |
Pinout & Package
MAX350CAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, body size 7.2mm × 5.3mm, and exposed pad not present. Pin 14 is N.C. (not internally connected); pins 10, 15, and 16 are also N.C. in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | SCLK, V+, DIN, GND | Serial clock input, positive supply, serial data input, digital ground reference |
| 5, 19 | COMA, RESET | Mux A common output terminal; asynchronous reset active-low |
| 6–9 | NO0A–NO3A | Normally open inputs for mux A - selectable as analog inputs or outputs |
| 11–14 | NO0B–NO3B | Normally open inputs for mux B - electrically isolated from mux A section |
| 17, 18, 20 | V−, DOUT, CS | Negative supply (or GND for single supply), daisy-chain serial output, chip-select enable |
| COMB | Pin 10 (N.C.) | Not connected - COMB is routed internally; external COMB pin omitted in SSOP package |
Key Features
| Feature | Design Value |
|---|---|
| SPI/QSPI/MICROWIRE-compatible interface | 3-wire synchronous protocol with CPOL=0 support - eliminates need for custom serial logic in MCU-based systems |
| Dual independent 4-to-1 mux sections | COMA/NO0A–NO3A and COMB/NO0B–NO3B operate separately - enables simultaneous routing of two analog signal streams |
| Rail-to-rail analog signal handling | Signals swing from V− to V+ without clipping - supports full dynamic range of ±5V, ±3V, or +12V systems |
| Break-before-make switching | Guaranteed tBBM ≥1ns - prevents momentary shorting between channels during reconfiguration |
| Asynchronous hardware RESET | Active-low pin forces all switches OFF and clears shift register - provides deterministic power-up and fault recovery state |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and pressure sensor outputs into a shared ADC channel in PLC I/O modules. IC Role / Device Role / Timing Role: Dual 4-to-1 analog mux routes four sensor signals per section to separate ADC inputs with synchronized CS control. Use Value: Reduces component count vs. discrete switches; 0.1nA off-leakage prevents drift in high-Z sensor bridges. | Use Scenario: Routing calibration references and DUT signals to precision measurement front-ends in benchtop ATE systems. IC Role / Device Role / Timing Role: Bidirectional SPST switches isolate reference sources during self-test and connect DUTs during measurement cycles. Use Value: 100Ω on-resistance and ≤10Ω flatness ensure <0.05% gain error across 0–5V input range. |
| Avionics Signal Management | Audio Signal Routing |
Use Scenario: Selecting between redundant flight control sensors (e.g., air data computers) in real-time safety-critical monitoring units. IC Role / Device Role / Timing Role: Dual mux sections independently route primary and backup sensor pairs to cross-check comparators. Use Value: >2kV ESD protection withstands aircraft static discharge; -55°C to +125°C qualified variants available (M-grade). | Use Scenario: Dynamic routing of line-level audio inputs (mic preamp, instrument, digital source) to DSP processing paths in pro-audio mixers. IC Role / Device Role / Timing Role: Low-distortion analog switch enabling silent channel switching via synchronized CS updates. Use Value: THD <0.01% at 1kHz (±5V supplies) preserves audio fidelity; rail-to-rail swing handles ±2.5V peak signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG732BRUZ | 32-channel, 16-bit parallel interface; 4.5Ω on-resistance; requires external address decoding logic | Higher channel count but no serial interface - suited for fixed-configuration systems with ample GPIO | Select when parallel control and ultra-low RON outweigh serial configurability and footprint savings |
| TMUX1308PWR | 8-channel single-ended mux; 4.3Ω on-resistance; I²C interface; no dual-section architecture | Lacks independent dual 4-to-1 structure - cannot route two simultaneous analog streams without external buffering | Select for low-RON, I²C-based designs where dual-mux functionality is not required |
Compared with ADG732BRUZ and TMUX1308PWR, MAX350CAP uniquely delivers dual independent 4-to-1 routing with SPI-compatible serial control in a compact 20-pin SSOP, enabling space-constrained systems to manage two analog domains with one IC and minimal firmware overhead.
Availability
MAX350CAP is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, avionics signal management, and audio signal routing requiring stable component supply and long-term manufacturability.
Supply support for MAX350CAP 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 MAX350CAP belongs to the MAX349/MAX350 family of serially controlled analog multiplexers engineered for low-voltage, rail-to-rail signal routing in space- and power-constrained instrumentation and control systems.
FAQ
What is the operating temperature range for the MAX350CAP?
The MAX350CAP is specified for operation from 0°C to +70°C. This commercial-grade temperature range is validated per the device's ordering information table and applies to all electrical characteristics unless otherwise noted in the datasheet's Absolute Maximum Ratings or Electrical Characteristics sections.
Does the MAX350CAP support single-supply operation?
Yes, the MAX350CAP supports single-supply operation from +2.7V to +16V. When using a single supply, V− must be connected to GND. The analog signal range extends rail-to-rail (0V to V+), and specifications such as on-resistance (270Ω max at +3V, 125Ω max at +5V) and leakage current are guaranteed under these conditions.
How does the daisy-chain functionality work on the MAX350CAP?
The MAX350CAP's DOUT pin outputs the same data shifted into DIN, delayed by eight clock cycles. By connecting DOUT of one device to DIN of the next and tying all CS pins together, multiple MAX350CAPs can be daisy-chained. A single 8×N-bit serial stream configures N devices, and asserting CS high simultaneously updates all switch states.
What is the purpose of the RESET pin on the MAX350CAP?
The RESET pin on the MAX350CAP is an asynchronous active-low input that forces all analog switches to the OFF state and resets the internal 8-bit shift register to zero. This provides deterministic initialization at power-up or after fault conditions, independent of SCLK or CS timing - ensuring known switch states before serial configuration begins.
Can the MAX350CAP handle bipolar analog signals?
Yes, the MAX350CAP handles bipolar analog signals when operated with dual supplies (±2.7V to ±8V). With V+ = +5V and V− = −5V, the analog signal range spans −5V to +5V. The bidirectional CMOS switches pass signals equally well in either direction, and rail-to-rail operation ensures full utilization of the supply rails without clipping.
MAX350CAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 16Ohm (Max)
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 275ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- 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:
- 20-SSOP
MAX350CAP FAQ
1.How can I place an order for MAX350CAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350CAP 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 MAX350CAP reliable?
The price and inventory of MAX350CAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350CAP is usually 5 days.
3.What payment methods are accepted for MAX350CAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350CAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350CAP?
MAX350CAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350CAP 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 MAX350CAP?
For technical support, including MAX350CAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350CAP requirements.
6.How does Aetrix verify that MAX350CAP is sourced from the original manufacturer or authorized distributors?
All MAX350CAP 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 MAX350CAP meets industry standards.
7.What is the process for return or replacement of MAX350CAP?
All MAX350CAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX350CAP, 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 MAX350CAP part is unused and in its original packaging.
Return procedure for MAX350CAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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