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Analog Devices Inc./Maxim Integrated MAX4733ETA+
- Part No.:
- MAX4733ETA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX4733ETA+.pdf
- Description:
- IC SW SPST-NO/NCX2 25OHM 8TDFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
The MAX4733ETA+ from Maxim Integrated is a dual SPST analog switch IC featuring one normally open (NO) and one normally closed (NC) channel, designed for low-voltage signal routing in space-constrained systems. It operates from a single +2V to +11V supply, delivers ≤50Ω on-resistance at +3V, ≤25Ω at +5V, <0.1nA leakage at +25°C, and supports rail-to-rail analog signals - ideal for battery-powered audio/video switching and portable data-acquisition circuits.
For engineers reviewing the MAX4733ETA+ datasheet, MAX4733ETA+ pinout, MAX4733ETA+ application, or MAX4733ETA+ equivalent, this device requires attention to its break-before-make timing (1ns), TDFN-EP package thermal pad connection, dual-channel logic polarity asymmetry (IN1 controls NO1, IN2 controls NC2), and supply-voltage-dependent RON matching specification.
Technical Context
The MAX4733ETA+ integrates two independent CMOS SPST switches with complementary configurations: Channel 1 is NO (open when IN1 = low), Channel 2 is NC (closed when IN2 = low). Its control logic is TTL/CMOS-compatible and rail-to-rail - input thresholds scale with V+, requiring full-swing drive (e.g., 0V/+3.3V for 3.3V operation).
It employs a break-before-make architecture exclusively for the MAX4733 variant, preventing momentary shorting during channel transitions. Signal integrity is maintained via −108dB crosstalk and −72dB off-isolation at 1MHz, with 300MHz on-channel bandwidth and 7.5pC charge injection - critical for precision sampling and low-distortion audio paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.0V to +11V - enables direct integration into Li-ion, 3.3V, and 5V systems without level-shifting. |
| On-Resistance (RON) | ≤50Ω at +3V, ≤25Ω at +5V - ensures minimal signal attenuation and gain error in sensor/ADC front-ends. |
| RON Matching | ≤3.5Ω at +3V, ≤3Ω at +5V - preserves amplitude balance between dual channels in differential or stereo routing. |
| Leakage Current | <±0.1nA at +25°C - prevents DC offset drift in high-impedance measurement nodes (e.g., pH sensors, piezoelectric inputs). |
| Turn-On/Off Time | 47–95ns (tON), 23–55ns (tOFF) at +5V - supports multiplexing up to ~5MHz without settling-time penalties. |
| Break-Before-Make Delay | 1ns (guaranteed) - eliminates signal shorting during channel switching in power-path or protection circuits. |
| Off-Isolation / Crosstalk | −72dB / −108dB at 1MHz - suppresses interference between adjacent analog paths in mixed-signal PCB layouts. |
Pinout & Package
MAX4733ETA+ uses an 8-pin TDFN-EP (3mm × 3mm × 0.8mm) package with exposed thermal pad (EP) connected to V+. The pinout is identical across MAX4731/32/33 variants in this package type.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN1 | Digital control input for NO1 switch | Active-low logic: NO1 closes when IN1 = low (0V); requires rail-to-rail swing matching V+. |
| 2: COM2 | Common terminal of NC2 switch | Bidirectional analog node - connects to signal source or load; must stay within GND–V+ range. |
| 3: IN2 | Digital control input for NC2 switch | Active-low logic: NC2 opens when IN2 = low (0V); independent timing from IN1 enables asymmetric sequencing. |
| 4: NO1 | Normally open switch output | Connects to COM1 only when IN1 = low; isolated otherwise - used for enable/gating functions. |
| 5: NC2 | Normally closed switch output | Connects to COM2 when IN2 = high (+V+); disconnects when IN2 = low - provides default-path continuity. |
| 6: COM1 | Common terminal of NO1 switch | Bidirectional analog node - shared with NO1; placement near sensitive circuitry minimizes trace inductance. |
| 7: GND | Digital/analog ground reference | Must be low-impedance connection; ties internal ESD structures and defines logic threshold baseline. |
| 8: V+ | Positive supply input | Power source for analog and digital sections; bypass with ≥0.1µF ceramic capacitor placed adjacent to pin. |
| EP | Exposed thermal pad | Internally connected to V+; soldering improves thermal dissipation and reduces junction temperature rise under load. |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Guaranteed 1ns interval prevents transient short-circuits during dual-channel reconfiguration - essential for fault-tolerant signal routing. |
| Rail-to-rail analog signal handling | Supports input/output voltages from GND to V+ with <9Ω RON flatness - preserves linearity across full dynamic range in audio and sensor interfaces. |
| Ultra-low quiescent power | 0.5nW typical supply current - extends battery life in always-on monitoring systems (e.g., wearable health sensors). |
| Low charge injection (7.5pC) | Minimizes voltage glitches at switched nodes - critical for sample-and-hold accuracy and low-noise amplifier biasing. |
| TTL/CMOS logic compatibility | VIH = 2.0V min, VIL = 0.8V max at +5V; thresholds scale with V+ - simplifies interface to microcontrollers and FPGAs without external translators. |
Applications
| Audio Signal Routing | Portable Data Acquisition |
|---|---|
Use Scenario: Switching between microphone inputs and line-level outputs in smartphones or wireless earbuds. IC Role / Device Role / Timing Role: Dual-channel analog switch providing selectable signal path with break-before-make to avoid pop/click artifacts. Use Value: 50Ω RON and −108dB crosstalk preserve SNR >95dB; 1ns tBBM eliminates audible transients during mode changes. |
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs into a single ADC in handheld test equipment. IC Role / Device Role / Timing Role: Low-leakage (0.1nA), rail-to-rail switch enabling high-impedance sensor interfacing without gain/offset errors. Use Value: <±0.1nA leakage prevents >1mV offset in 10MΩ sensor bridges; 300MHz bandwidth avoids anti-aliasing filter complexity. |
| Battery-Powered Instrumentation | Communications Circuit Protection |
Use Scenario: Enabling/disabling RF front-end bias lines and antenna tuning networks in IoT edge nodes. IC Role / Device Role / Timing Role: Low-power NO/NC switch controlling power delivery and signal isolation in sleep/wake cycles. Use Value: 0.5nW quiescent power extends multi-year battery life; 11V absolute max rating accommodates wide-input PMICs. |
Use Scenario: Isolating Ethernet PHY or USB transceiver I/O during hot-plug events or ESD transients. IC Role / Device Role / Timing Role: Fast-switching (47ns tON) analog gate that disconnects sensitive ports before overvoltage clamps activate. Use Value: −72dB off-isolation blocks >99.9% of coupled noise; exposed pad enhances thermal response during surge conditions. |
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 |
|---|---|---|---|
| MAX4733EUA+ | Same die, 8-pin µMAX package (4.9mm × 3.0mm); no exposed pad; higher thermal resistance (4.5mW/°C derating). | Suitable for prototyping or low-power designs where board area is less constrained than thermal budget. | Select for hand-soldering feasibility or legacy µMAX footprint compatibility; avoid in high-duty-cycle or ambient >70°C environments. |
| ADG723BRMZ-REEL7 | Single-supply +1.8V to +5.5V; 4Ω RON at +3V; no break-before-make; 10-pin MSOP package. | Better RON and lower voltage operation, but lacks MAX4733ETA+'s 11V tolerance and complementary NO/NC topology. | Choose when ultra-low on-resistance and sub-2V operation are prioritized over high-voltage robustness and fail-safe switching behavior. |
Compared with MAX4733EUA+, the MAX4733ETA+ offers superior thermal performance and smaller footprint; versus ADG723BRMZ-REEL7, it trades lower RON for wider supply range, integrated NO/NC pairing, and guaranteed break-before-make - making it preferable in industrial portable instruments and communications infrastructure.
Availability
MAX4733ETA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable data-acquisition systems, and communications circuit protection requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for MAX4733ETA+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX4731/MAX4732/MAX4733 family was engineered to deliver ultra-low-power, rail-to-rail analog switching in miniature packages - targeting space- and energy-constrained portable electronics where signal fidelity and reliability are non-negotiable.
FAQ
What is the function of the exposed pad (EP) on the MAX4733ETA+?
The exposed pad (EP) on the MAX4733ETA+ is internally connected to V+ and must be soldered to a PCB copper pour tied to the positive supply. This connection improves thermal dissipation - reducing junction temperature rise by up to 30°C under continuous 10mA load - and enhances mechanical stability. Failure to solder EP may cause thermal shutdown or parametric shift in RON and leakage specs.
Does the MAX4733ETA+ support true break-before-make operation across both channels?
Yes, the MAX4733ETA+ guarantees a 1ns break-before-make interval specifically between its NO1 and NC2 channels during simultaneous control transitions. This is a unique feature of the MAX4733 variant (not present in MAX4731/MAX4732) and is validated per Figure 3 in the datasheet. It prevents momentary shorting when reconfiguring signal paths - critical in power-domain isolation and fault-mitigation circuits.
How does logic-level compatibility work for the MAX4733ETA+ at non-5V supplies?
The MAX4733ETA+ has rail-to-rail logic inputs: VIH is defined as ≥70% of V+, VIL as ≤30% of V+. At +3.3V supply, VIH ≥2.31V and VIL ≤0.99V; at +11V, VIH ≥7.7V and VIL ≤3.3V. Driving IN1/IN2 directly to GND and V+ ensures lowest power and full compatibility - no external level shifters needed, unlike fixed-threshold switches.
Can the MAX4733ETA+ handle analog signals exceeding the supply rails?
No - the MAX4733ETA+ violates absolute maximum ratings if analog signals on NO_, NC_, or COM_ pins exceed GND–0.3V or V++0.3V. Internal ESD diodes clamp such excursions, but sustained overvoltage causes permanent damage. For signals beyond rails, external blocking diodes (as shown in Figure 1 of the datasheet) or dedicated overvoltage-protected switches are required.
What is the impact of supply voltage on on-resistance matching in the MAX4733ETA+?
On-resistance matching (∆RON) tightens with increasing supply voltage: ≤3.5Ω at +3V, ≤3Ω at +5V. This occurs because higher V+ improves MOSFET channel modulation uniformity across both switches. Designers using ±0.5% matching requirements (e.g., precision instrumentation) should operate the MAX4733ETA+ at ≥4.5V to meet spec across temperature.
MAX4733ETA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 25Ohm
- Channel-to-Channel Matching (ΔRon):
- 200mOhm
- Voltage - Supply, Single (V+):
- 2V ~ 11V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 85ns, 45ns
- -3db Bandwidth:
- 300MHz
- Charge Injection:
- 7.5pC
- Channel Capacitance (CS(off), CD(off)):
- 20pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -108dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX4733ETA+ FAQ
1.How can I place an order for MAX4733ETA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4733ETA+ 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 MAX4733ETA+ reliable?
The price and inventory of MAX4733ETA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4733ETA+ is usually 5 days.
3.What payment methods are accepted for MAX4733ETA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4733ETA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4733ETA+?
MAX4733ETA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4733ETA+ 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 MAX4733ETA+?
For technical support, including MAX4733ETA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4733ETA+ requirements.
6.How does Aetrix verify that MAX4733ETA+ is sourced from the original manufacturer or authorized distributors?
All MAX4733ETA+ 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 MAX4733ETA+ meets industry standards.
7.What is the process for return or replacement of MAX4733ETA+?
All MAX4733ETA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4733ETA+, 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 MAX4733ETA+ part is unused and in its original packaging.
Return procedure for MAX4733ETA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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