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Analog Devices Inc./Maxim Integrated MAX320EUA+
- Part No.:
- MAX320EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX320EUA+.pdf
- Description:
- IC SWITCH SPST-NOX2 35OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,972
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Product details
Overview
The MAX320EUA+ from Maxim Integrated is a precision dual SPST analog switch with two normally open (NO) channels, designed for ±3V to ±8V bipolar supply operation. It delivers 35Ω max on-resistance, 150ns max turn-on time, 100pA max leakage at +25°C, and 5pC max charge injection - enabling high-fidelity signal routing in ±5V DAC/ADC interfaces and battery-powered test equipment.
For engineers reviewing the MAX320EUA+ datasheet, MAX320EUA+ pinout, MAX320EUA+ application, or MAX320EUA+ equivalent, key selection criteria include guaranteed break-before-make timing (not applicable), RON matching <2Ω between channels, ESD robustness >2000V per Method 3015.7, and µMAX-8 package compatibility with space-constrained portable designs.
Technical Context
The MAX320EUA+ implements CMOS-based transmission-gate architecture with rail-to-rail analog signal handling (VCOM, VNO = V+ to V−) and logic-controlled channel switching. Its input thresholds scale with V+ (VINH = V+ − 1.5V, VINL = V+ − 2.5V), supporting direct interface to microcontroller GPIOs without level-shifting.
Each channel operates bidirectionally with matched on-resistance flatness (<4Ω over ±3V signal range) and low temperature drift - critical for precision sample-and-hold circuits and military radio front-end switching where gain stability and distortion control are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω max at ±5V supplies - ensures minimal signal attenuation and gain error in precision instrumentation paths. |
| RON Matching | <2Ω between channels - enables accurate differential signal switching without channel-to-channel gain mismatch. |
| Charge Injection | 5pC max - limits voltage glitch on sampled nodes, preserving accuracy in high-resolution ADC sample-and-hold stages. |
| Leakage Current | 100pA max at +25°C - maintains signal integrity in high-impedance sensor interfaces and low-power standby modes. |
| Switching Speed | tON <150ns, tOFF <100ns - supports multiplexing of audio, video, and fast control signals up to ~3MHz bandwidth. |
| ESD Protection | >2000V per Method 3015.7 - provides robust handling during board assembly and field service in rugged environments. |
| Supply Range | ±3V to ±8V - allows flexible integration into legacy ±5V systems and newer low-voltage bipolar rails without external regulators. |
Pinout & Package
MAX320EUA+ is housed in an 8-pin µMAX package (2.1mm × 1.6mm, 0.5mm pitch), optimized for high-density PCB layouts in portable and aerospace applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Accepts +3V to +8V; must be powered before V− and logic/analog signals to prevent latch-up. |
| IN1 | Channel 1 logic control input | Active-high: drives CH1 NO1 path ON when ≥(V+ − 1.5V); tolerant down to V−. |
| COM2 | Channel 2 common terminal | Bidirectional analog node - connects to load or source depending on signal flow direction. |
| NO2 | Channel 2 normally open terminal | Open-circuit when IN2 = LOW; closed to COM2 when IN2 = HIGH - defines SPST NO topology. |
| V− | Negative supply rail | Accepts −3V to −8V; referenced for all analog and logic thresholds. |
| IN2 | Channel 2 logic control input | Independent control of second switch; no inter-channel timing dependency. |
| COM1 | Channel 1 common terminal | Shared analog path for CH1; matches COM2 electrically for differential pair routing. |
| NO1 | Channel 1 normally open terminal | Primary signal output/input for first switch; identical electrical specs to NO2. |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance flatness | <4Ω variation across ±3V analog range - preserves linearity in audio and sensor signal chains. |
| Bipolar supply support | Operates from ±3V to ±8V - eliminates need for charge pumps or level shifters in mixed-signal systems. |
| Guaranteed low charge injection | ≤5pC - reduces settling error in precision sampling applications, especially with high-Z hold capacitors. |
| Ultra-low leakage current | 100pA max at +25°C, <2.5nA at +85°C - enables reliable operation in battery-backed memory and long-interval monitoring. |
| Fast, matched switching | tON/tOFF <150ns/100ns with <2Ω RON match - supports synchronous multi-channel acquisition without skew-induced phase error. |
Applications
| Battery-Powered Test Equipment | ±5V Precision Data Acquisition |
|---|---|
|
Use Scenario: Portable handheld multimeters and calibration sources requiring low-power, high-accuracy analog multiplexing under battery constraints. IC Role / Device Role / Timing Role: Dual SPST NO switch routing sensor inputs and reference voltages to a single ADC channel. Use Value: 1.25mW total power and 100pA leakage extend battery life while maintaining measurement repeatability across temperature. |
Use Scenario: Industrial data loggers interfacing multiple ±5V sensors (e.g., strain gauges, RTDs) to a 16-bit SAR ADC. IC Role / Device Role / Timing Role: Precision analog switch providing matched channel resistance and low charge injection for clean sample-and-hold operation. Use Value: 35Ω RON max and <4Ω flatness minimize gain error and THD; 5pC charge injection prevents hold-node disturbance. |
| Military Radio Front-End Switching | Heads-Up Display (HUD) Signal Routing |
|
Use Scenario: RF receiver protection and antenna diversity switching in compact manpack radios operating across −40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability analog switch isolating LNA inputs during transmit bursts and routing IF signals between processing paths. Use Value: >2000V ESD rating and guaranteed performance over full military temp range ensure field survivability and signal fidelity. |
Use Scenario: Video signal selection between primary flight display and backup HUD in avionics systems with strict size and weight limits. IC Role / Device Role / Timing Role: Low-distortion SPST switch enabling seamless video source handover without visible glitches or brightness shifts. Use Value: Fast 150ns turn-on and bidirectional capability allow real-time video path reconfiguration with sub-microsecond latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX320ESA+ | Same electrical specs; SO-8 package (3.9mm × 4.9mm) vs. µMAX-8 (2.1mm × 1.6mm) | Preferred for prototyping and lower-volume industrial boards where thermal mass and hand-soldering ease matter more than footprint. | Select MAX320ESA+ when board space is less constrained and reflow compatibility with standard SO footprints is required. |
| ADG1419BRMZ | Single-supply only (±15V max unipolar, not bipolar); 0.7Ω typical RON, but higher 25pC charge injection and no guaranteed 2000V ESD rating | Suitable for high-speed, low-RON applications where bipolar supply is absent and ESD robustness is secondary. | Choose ADG1419BRMZ only if system uses single-ended supplies and prioritizes ultra-low on-resistance over leakage and ESD margin. |
Compared with MAX320ESA+ and ADG1419BRMZ, the MAX320EUA+ uniquely combines µMAX footprint efficiency, true bipolar ±3V–±8V operation, sub-5pC charge injection, and certified >2000V ESD - making it the optimal choice for miniaturized, battery-operated, and mission-critical analog routing where supply flexibility and reliability are non-negotiable.
Availability
MAX320EUA+ is available at Aetrix Electronics and suitable for battery-operated systems, precision data acquisition, and military-grade communications equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX320EUA+ 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX320 series belongs to Maxim's precision analog switch product line, engineered specifically for low-leakage, low-distortion signal routing in dual-supply systems where rail-to-rail analog swing and minimal charge injection are mandatory design requirements.
FAQ
What is the maximum allowable supply voltage range for the MAX320EUA+?
The MAX320EUA+ supports dual-supply operation from ±3V to ±8V, with the absolute maximum V+–V− differential rated at 17V. Exceeding ±8V on either rail risks permanent damage. For reliable operation in ±5V systems - the most common use case - the MAX320EUA+ delivers 35Ω max RON, 150ns tON, and 100pA leakage, making it ideal for precision DAC/ADC interfacing where supply headroom and signal fidelity are tightly coupled.
Does the MAX320EUA+ support bidirectional analog signal routing?
Yes, the MAX320EUA+ supports fully bidirectional analog signal flow on all NO and COM terminals - meaning the same physical pin can serve as input or output depending on system topology. This is inherent to its transmission-gate architecture and confirmed by the datasheet's "Analog Signal Levels" section, which specifies VCOM, VNO, and VNC operation from V− to V+. In practice, this enables flexible routing in audio mixing, sensor multiplexing, and redundant signal path designs without polarity constraints - a key advantage of the MAX320EUA+ over unidirectional switches.
What is the guaranteed charge injection specification for the MAX320EUA+ and why does it matter?
The MAX320EUA+ guarantees ≤5pC maximum charge injection, measured with CL = 1.0nF, VGEN = 0V, and RGEN = 0Ω. This parameter directly impacts settling time and accuracy in sample-and-hold circuits and switched-capacitor filters: lower charge injection minimizes voltage glitches on hold capacitors, reducing acquisition errors and improving effective resolution. For example, in a 16-bit ADC system with a 10nF hold capacitor, 5pC injection causes only ~0.5mV disturbance - well within LSB tolerance - confirming the MAX320EUA+'s suitability for high-fidelity data acquisition where the MAX320EUA+ replaces older switches with 10–20pC injection.
How does the MAX320EUA+ handle logic-level interfacing with microcontrollers?
The MAX320EUA+ uses supply-referenced logic thresholds: VINH = V+ − 1.5V and VINL = V+ − 2.5V, allowing direct connection to 3.3V or 5V GPIOs when V+ = +5V (i.e., VIH ≈ 3.5V, VIL ≈ 2.5V). Inputs tolerate voltages down to V− without damage. This eliminates level shifters in most embedded designs. The MAX320EUA+ also draws only 0.5µA max input current, minimizing MCU drive burden - a critical feature for low-power battery systems where the MAX320EUA+ enables long-term sensor polling without compromising host processor efficiency.
Is the MAX320EUA+ pin-compatible with other variants in the MAX320 family?
Yes, the MAX320EUA+ shares identical pinout and footprint with MAX321EUA+ and MAX322EUA+ - all three use the same µMAX-8 package and terminal assignment (V+, IN1, COM2, NO2/NC2, V−, IN2, COM1, NO1/NC1). However, internal switch configuration differs: MAX320EUA+ has two NO switches, MAX321EUA+ has two NC, and MAX322EUA+ has one NO + one NC. Thus, while PCB layout is interchangeable, firmware logic and signal routing must align with the specific variant's behavior - a key design consideration when selecting the MAX320EUA+ for dual-NO functionality in new designs or drop-in replacements.
MAX320EUA+ 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:
- 2
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 9pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX320EUA+ FAQ
1.How can I place an order for MAX320EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX320EUA+ 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 MAX320EUA+ reliable?
The price and inventory of MAX320EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX320EUA+ is usually 5 days.
3.What payment methods are accepted for MAX320EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX320EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX320EUA+?
MAX320EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX320EUA+ 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 MAX320EUA+?
For technical support, including MAX320EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX320EUA+ requirements.
6.How does Aetrix verify that MAX320EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX320EUA+ 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 MAX320EUA+ meets industry standards.
7.What is the process for return or replacement of MAX320EUA+?
All MAX320EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX320EUA+, 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 MAX320EUA+ part is unused and in its original packaging.
Return procedure for MAX320EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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