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Analog Devices Inc./Maxim Integrated MAX4729EXT
- Part No.:
- MAX4729EXT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX4729EXT.pdf
- Description:
- IC SWITCH SPDT X 1 5.5OHM SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
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Product details
Overview
MAX4729EXT from Maxim Integrated is a low-voltage, single-pole/double-throw (SPDT) CMOS analog switch in SC70-6 package, delivering 3.5Ω on-resistance at +2.7V supply, 0.45Ω RON flatness, and 1nA supply current. It routes audio/video signals or sensor inputs in battery-powered portable equipment with rail-to-rail analog signal handling from 0V to V+.
For engineers reviewing the MAX4729EXT datasheet, MAX4729EXT pinout, MAX4729EXT application, or MAX4729EXT equivalent, key selection criteria include on-resistance matching (±0.05Ω), -3dB bandwidth (300MHz), THD (0.036%), and compatibility with 1.8V–5.5V single-supply systems requiring minimal leakage and fast switching (tON/tOFF = 45ns/26ns).
Technical Context
The MAX4729EXT implements a break-before-make SPDT topology using CMOS transmission-gate architecture, supporting bidirectional analog signal flow between COM and either NO or NC terminals. Its digital control input (IN) accepts TTL/CMOS logic levels up to +5.5V independent of V+, enabling mixed-voltage system interfacing.
It features internal ESD protection and clamping diodes on analog pins, with guaranteed operation across -40°C to +85°C. The device maintains low charge injection (3pC) and high off-isolation (-67dB at 1MHz), critical for precision sample-and-hold and low-distortion audio routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 3.5Ω typical at V+ = +2.7V - ensures minimal voltage drop and signal attenuation in low-voltage signal paths |
| RON Flatness | 0.45Ω max at V+ = +2.7V - preserves linearity across full analog input range (0V to V+) |
| -3dB Bandwidth | 300MHz - supports high-fidelity video and broadband data-acquisition signal routing |
| Total Harmonic Distortion | 0.036% at 20Hz–20kHz - enables clean audio switching without audible artifacts |
| Supply Current | 1nA typical - extends battery life in always-on portable instrumentation and wearables |
| Charge Injection | 3pC - minimizes voltage glitch in precision sampling circuits and ADC front-ends |
| Off-Isolation | -67dB at 1MHz - prevents crosstalk between inactive channels in multi-signal systems |
Pinout & Package
MAX4729EXT is housed in a RoHS-compliant 6-pin SC70 package (outline 21-0077, land pattern 90-0189), measuring 2.0mm × 1.25mm × 0.9mm with 0.65mm pitch. Pin 1 is marked by a dot; pin numbering follows standard SC70 top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NO) | Normally Open analog terminal | Connects to COM when IN = logic high; used for primary signal path selection |
| 2 (V+) | Positive supply voltage | Single 1.8V–5.5V rail powers analog and digital sections; must be applied before analog signals |
| 3 (GND) | Ground reference | Common return for supply and logic; requires low-impedance connection to minimize noise coupling |
| 4 (NC) | Normally Closed analog terminal | Connects to COM when IN = logic low; provides complementary switching path to NO |
| 5 (COM) | Common analog terminal | Bidirectional I/O node; connects to source/sink in signal routing applications |
| 6 (IN) | Digital control input | TTL/CMOS-compatible; accepts 0V to +5.5V logic regardless of V+, enabling flexible level-shifting |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance match | ±0.05Ω between NO and NC channels at +2.7V - ensures balanced signal integrity in differential or dual-path designs |
| Ultra-low supply current | 1nA typical - eliminates standby power concerns in energy-harvesting and coin-cell-powered devices |
| High-frequency performance | 300MHz -3dB bandwidth with 19.5pF on-capacitance - supports HDMI-level video and USB 1.1 data routing |
| Robust overvoltage tolerance | IN accepts up to +6V; analog pins tolerate -0.3V to (V+ + 0.3V) - simplifies interface with legacy or mixed-voltage peripherals |
| Extended temperature operation | Specified from -40°C to +85°C - validated for industrial handhelds, automotive infotainment accessories, and outdoor sensors |
Applications
| Audio Signal Routing | Portable Data Acquisition |
|---|---|
Use Scenario: Switching between microphone inputs or headphone outputs in Bluetooth headsets and voice-controlled wearables. IC Role / Device Role / Timing Role: Bidirectional SPDT analog switch controlling signal path direction and source selection under microcontroller GPIO control. Use Value: 0.036% THD and 300MHz bandwidth preserve full audio fidelity; 1nA quiescent current extends talk-time by >15% versus comparable switches. | Use Scenario: Multiplexing sensor outputs (thermocouple, RTD, pH electrode) into a single ADC channel in handheld test meters. IC Role / Device Role / Timing Role: Low-leakage, low-RON analog multiplexer enabling accurate DC-coupled measurements without gain/offset drift. Use Value: ±4nA max COM on-leakage and 0.45Ω RON flatness limit measurement error to <0.02% FS across -40°C to +85°C. |
| Sample-and-Hold Circuits | Relay Replacement in IoT Nodes |
Use Scenario: Capturing transient analog waveforms in oscilloscope probes and power-quality analyzers with microsecond timing precision. IC Role / Device Role / Timing Role: Precision hold switch isolating sampling capacitor during acquisition phase with minimal charge injection. Use Value: 3pC charge injection reduces aperture error to <1LSB in 12-bit systems; 45ns tON enables ≥10MSps sampling rates. | Use Scenario: Replacing electromechanical relays in smart home controllers for AC load switching via isolated GPIO control. IC Role / Device Role / Timing Role: Solid-state SPDT switch driving optocoupler inputs or low-power relay coils with logic-level isolation. Use Value: 3.5Ω RON limits self-heating to <0.5°C at 10mA; SC70 footprint saves >70% board area versus SO-8 relay drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4730EXT+T | Same package and pinout; higher RON match (±0.2Ω) but lower RON flatness (1.3Ω) at +2.7V | Preferred where channel matching is less critical than flatness over wide signal swing | Select MAX4730EXT+T only if design tolerates higher RON variation across analog range |
| TMUX1574DSGR | 4-channel SPDT, 4.5Ω RON, 1.8V–5.5V supply, 3.5pC charge injection, SC70-10 package | Offers additional channels but requires PCB redesign due to different pin count and layout | Choose TMUX1574DSGR only when multi-channel consolidation outweighs SC70-6 footprint retention |
Compared with MAX4729EXT, MAX4730EXT+T trades tighter RON matching for reduced flatness sensitivity, while TMUX1574DSGR adds channel density at the cost of pinout compatibility and slightly higher RON-making MAX4729EXT optimal for space-constrained, single-switch, high-linearity portable designs.
Availability
MAX4729EXT is available at Aetrix Electronics and suitable for battery-operated equipment, audio/video-signal routing, and low-voltage data-acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4729EXT 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, medical, communications, and consumer applications.
The MAX4729EXT belongs to Maxim's low-voltage analog switch product line, engineered specifically for ultra-low-power, high-fidelity signal routing in portable and space-constrained electronics.
FAQ
What is the maximum supply voltage rating for MAX4729EXT?
The MAX4729EXT has an absolute maximum supply voltage (V+) rating of +6V. However, its specified operational range is +1.8V to +5.5V. Exceeding +6V may cause permanent damage. The device is designed to operate reliably within its 1.8V–5.5V range while maintaining 3.5Ω RON, 1nA supply current, and full -40°C to +85°C temperature specification. Always observe the absolute maximum ratings in the MAX4729EXT datasheet to ensure long-term reliability.
Does MAX4729EXT support rail-to-rail analog signal switching?
Yes, the MAX4729EXT supports rail-to-rail analog signal switching: its analog terminals (COM, NO, NC) handle input voltages from 0V to V+, provided V+ is within the 1.8V–5.5V operating range. This capability is enabled by its CMOS transmission-gate architecture and internal level-shifting. At V+ = +2.7V, the device maintains 3.5Ω RON and 0.45Ω RON flatness across the full 0V–2.7V span-critical for undistorted signal routing in MAX4729EXT-based audio and sensor interfaces.
What is the logic voltage tolerance of the IN pin on MAX4729EXT?
The IN pin of the MAX4729EXT accepts logic input voltages from 0V up to +5.5V, independent of the V+ supply voltage. For example, with V+ = +3.3V, IN can be driven directly from a +5V microcontroller GPIO without level shifting. Logic thresholds are VIH ≥ +2.0V and VIL ≤ +0.4V across -40°C to +85°C. This feature simplifies system integration in mixed-voltage environments and is explicitly guaranteed in the MAX4729EXT electrical characteristics table.
How does MAX4729EXT minimize distortion in audio applications?
The MAX4729EXT minimizes audio distortion through three key specifications: 0.036% total harmonic distortion (THD) at 20Hz–20kHz, 300MHz -3dB bandwidth preserving high-frequency content, and 0.45Ω RON flatness ensuring consistent gain across the signal swing. These parameters are measured under standard conditions (RL = 600Ω, VGEN = 2VP-P) and directly enable clean headphone output switching and microphone input selection in portable audio gear using the MAX4729EXT.
Is MAX4729EXT pin-compatible with MAX4730EXT+T?
Yes, MAX4729EXT and MAX4730EXT+T are pin-compatible in the SC70-6 package: both share identical pin 1 (NO), pin 2 (V+), pin 3 (GND), pin 4 (NC), pin 5 (COM), and pin 6 (IN) assignments and functions. However, their electrical behavior differs-MAX4729EXT offers tighter RON match (±0.05Ω) while MAX4730EXT+T provides better RON flatness consistency across temperature. No PCB changes are required when substituting MAX4729EXT with MAX4730EXT+T, but system-level validation of RON variation is recommended.
MAX4729EXT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Strip
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 5.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 50mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 45ns, 26ns
- -3db Bandwidth:
- 300MHz
- Charge Injection:
- 3pC
- Channel Capacitance (CS(off), CD(off)):
- 6.5pF
- Current - Leakage (IS(off)) (Max):
- 2nA
- Crosstalk:
- -67dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
MAX4729EXT FAQ
1.How can I place an order for MAX4729EXT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4729EXT 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 MAX4729EXT reliable?
The price and inventory of MAX4729EXT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4729EXT is usually 5 days.
3.What payment methods are accepted for MAX4729EXT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4729EXT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4729EXT?
MAX4729EXT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4729EXT 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 MAX4729EXT?
For technical support, including MAX4729EXT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4729EXT requirements.
6.How does Aetrix verify that MAX4729EXT is sourced from the original manufacturer or authorized distributors?
All MAX4729EXT 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 MAX4729EXT meets industry standards.
7.What is the process for return or replacement of MAX4729EXT?
All MAX4729EXT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4729EXT, 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 MAX4729EXT part is unused and in its original packaging.
Return procedure for MAX4729EXT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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