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Analog Devices Inc./Maxim Integrated MAX4729ELT+T
- Part No.:
- MAX4729ELT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFDFN
- Datasheet:
-
MAX4729ELT+T.pdf
- Description:
- IC SWITCH SPDT X 1 5.5OHM 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,974
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Product details
Overview
MAX4729ELT+T from Maxim Integrated is a low-voltage, single-pole/double-throw (SPDT) CMOS analog switch in a 6-pin µDFN package, operating from +1.8V to +5.5V supply, delivering 3.5Ω typical on-resistance at +2.7V, 0.45Ω RON flatness, and 300MHz -3dB bandwidth - used for precision audio routing and battery-powered signal switching.
For engineers reviewing the MAX4729ELT+T datasheet, MAX4729ELT+T pinout, MAX4729ELT+T application, or MAX4729ELT+T equivalent, key selection criteria include its ultra-low 1nA supply current, ±80mA continuous channel current rating, TTL/CMOS-compatible logic inputs tolerant up to +5.5V, and guaranteed performance across -40°C to +85°C.
Technical Context
The MAX4729ELT+T implements a single SPDT analog switch with break-before-make timing (≤1ns), enabling clean signal path isolation during state transitions. Its CMOS process ensures rail-to-rail analog signal handling (0V to V+) and low charge injection (3pC), critical for sample-and-hold and multiplexed data acquisition.
It features dual-channel matching (0.05Ω RON match at +2.7V), low off-isolation (-67dB at 1MHz), and crosstalk suppression (-67dB at 1MHz), supporting high-fidelity audio and RF-adjacent signal routing without inter-channel coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - supports direct interface with Li-ion, 3.3V, and 5V logic domains without level shifters. |
| On-Resistance (RON) | 3.5Ω typical at +2.7V - minimizes voltage drop and signal attenuation in low-level analog paths. |
| RON Flatness | 0.45Ω max at +2.7V - ensures consistent gain and linearity across full analog input range (0V to V+). |
| -3dB Bandwidth | 300MHz - enables reliable switching of video, USB 1.1, and baseband RF signals without roll-off. |
| Supply Current (I+) | 1nA typical - eliminates standby power concerns in always-on portable and IoT sensor nodes. |
| Off-Isolation | -67dB at 1MHz - prevents leakage between active and inactive channels in multi-source audio/video systems. |
| Charge Injection | 3pC - reduces settling error in precision ADC front-ends and sample-and-hold circuits. |
Pinout & Package
MAX4729ELT+T is housed in a 1.5mm × 1.0mm, 0.5mm pitch, 6-pin µDFN package (package code L611+1), RoHS-compliant and moisture-sensitive level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NO (Normally Open) | Analog output terminal connected to COM when IN = HIGH; unconnected otherwise - used for primary signal path selection. |
| 2 | V+ | Positive supply input - must be applied before analog signals to prevent latch-up; accepts +1.8V to +5.5V. |
| 3 | GND | Ground reference for analog and digital sections - requires low-impedance connection to minimize noise coupling. |
| 4 | NC (Normally Closed) | Analog output terminal connected to COM when IN = LOW - provides complementary signal path to NO. |
| 5 | COM | Common analog input/output terminal - bidirectional; connects to either NO or NC based on IN logic state. |
| 6 | IN | Digital control input - TTL/CMOS-compatible; accepts 0V to +5.5V regardless of V+, enabling mixed-voltage system interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Low 3.5Ω RON | Reduces insertion loss and distortion in audio and sensor signal chains, preserving SNR in battery-powered devices. |
| 0.45Ω RON flatness | Maintains consistent channel gain across full signal swing, eliminating amplitude-dependent nonlinearity in instrumentation amplifiers. |
| 300MHz -3dB bandwidth | Supports HDMI DDC, USB 1.1, and composite video switching without edge degradation or timing skew. |
| 1nA supply current | Enables multi-year operation on coin-cell batteries in wearables and remote sensors without duty cycling. |
| ±80mA channel current | Handles peak currents in relay-replacement applications such as programmable gain stages and sensor excitation circuits. |
Applications
| Portable Audio Routing | Low-Voltage Data Acquisition |
|---|---|
|
Use Scenario: Switching microphone inputs between headset jack and internal MEMS mic in Bluetooth earbuds. IC Role / Device Role / Timing Role: SPDT analog switch selecting between two analog sources feeding a single ADC input. Use Value: 3.5Ω RON and 0.035% THD preserve voice clarity; 1nA I+ extends battery life beyond 100 hours per charge. |
Use Scenario: Multiplexing thermistor, RTD, and potentiometer signals into a 16-bit SAR ADC in handheld test equipment. IC Role / Device Role / Timing Role: Low-leakage, low-RON analog switch isolating sensor paths during sampling. Use Value: 0.05Ω RON match and 3pC charge injection ensure <1 LSB measurement error across all channels. |
| Sample-and-Hold Circuits | Communications Signal Switching |
|
Use Scenario: Capturing fast transient waveforms in oscilloscope front-end using switched-capacitor hold circuitry. IC Role / Device Role / Timing Role: Precision analog switch controlling capacitor charging phase with minimal droop and kickback. Use Value: Break-before-make timing ≤1ns prevents short-circuit transients; 19.5pF on-capacitance minimizes hold-time settling delay. |
Use Scenario: Selecting between GPS L1 and cellular LTE bands in shared antenna front-end of asset trackers. IC Role / Device Role / Timing Role: High-isolation SPDT switch routing RF-adjacent baseband signals without crosstalk. Use Value: -67dB off-isolation and -67dB crosstalk at 1MHz suppress interference between co-located radios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4730ELT+T | Same package and pinout, but inverted logic: IN = LOW selects NC, IN = HIGH selects NO - truth table opposite of MAX4729ELT+T. | Requires firmware or logic inversion in control path; identical analog performance and thermal specs. | Select MAX4730ELT+T only when system-level logic polarity matches its inverted function. |
| TMUX1574DSGR | Higher RON (6.5Ω typ), wider supply (1.08V–5.5V), lower leakage (<1pA), but no guaranteed RON flatness spec. | Better for ultra-low-power sub-1V systems; less suitable for precision gain-matched multi-channel designs. | Choose TMUX1574DSGR when supply voltage drops below 1.8V or picoampere leakage dominates design priority. |
Compared with MAX4730ELT+T and TMUX1574DSGR, the MAX4729ELT+T uniquely balances ultra-low RON, tight RON flatness, and sub-nanoampere quiescent current - making it optimal for portable audio and precision data acquisition where analog fidelity and battery life are jointly constrained.
Availability
MAX4729ELT+T is available at Aetrix Electronics and suitable for portable audio routing, low-voltage data-acquisition systems, sample-and-hold circuits, communications signal switching, and relay replacement requiring stable component supply and long-term manufacturability.
Supply support for MAX4729ELT+T 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, and consumer applications.
The MAX4729ELT+T belongs to Maxim's low-voltage analog switch product line, engineered specifically for high-fidelity, low-power signal routing in space-constrained portable electronics.
FAQ
What is the maximum analog signal voltage range supported by the MAX4729ELT+T?
The MAX4729ELT+T supports analog signals from 0V to V+ (rail-to-rail), with absolute maximum ratings allowing COM, NO, and NC terminals to swing from -0.3V to (V+ + 0.3V). This enables full utilization of the supply voltage for signal headroom - for example, with V+ = +3.3V, analog signals can range from 0V to +3.3V without clipping or distortion. The device includes internal ESD clamps to protect against overvoltage transients.
Does the MAX4729ELT+T require external pull-up or pull-down resistors on the IN pin?
No, the MAX4729ELT+T does not require external pull-up or pull-down resistors on the IN pin. Its digital input is TTL/CMOS-compatible with guaranteed VIH ≥ +2.0V and VIL ≤ +0.4V across -40°C to +85°C, and input leakage remains below ±1µA. The IN pin accepts voltages from 0V to +5.5V regardless of V+, so direct connection to microcontroller GPIOs (e.g., 1.8V, 3.3V, or 5V logic) is safe and functional without additional biasing components.
Can the MAX4729ELT+T be used in bidirectional signal paths?
Yes, the MAX4729ELT+T supports fully bidirectional analog signal flow. Both COM and NO/NC terminals are symmetrical in construction and rated for ±80mA continuous current, with identical RON, capacitance, and leakage specifications in either direction. This makes the MAX4729ELT+T suitable for applications like shared sensor buses, I²C signal routing, or duplex audio interfaces where signal direction may reverse dynamically.
What is the thermal performance of the MAX4729ELT+T in its µDFN package?
The MAX4729ELT+T in the 6-pin µDFN package (L611+1) has a thermal resistance θJA of approximately 476°C/W (calculated from 168mW max power dissipation at TA = +70°C with 2.1mW/°C derating). At 1nA supply current and typical analog loads, self-heating is negligible - junction temperature rise stays below 0.1°C under normal operation. The package is MSL1 and compatible with standard reflow profiles up to +260°C peak.
How does the MAX4729ELT+T handle power-supply sequencing?
The MAX4729ELT+T requires V+ to be applied before analog signals to prevent forward-biasing internal ESD diodes and potential latch-up. Digital inputs (IN) tolerate up to +5.5V regardless of V+, but analog terminals (COM, NO, NC) must remain within -0.3V to (V+ + 0.3V) at all times. Proper sequencing - apply V+, then IN, then analog signals - ensures robust operation across automotive and industrial environments where supply ramps may be asynchronous.
MAX4729ELT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 6-µDFN (1.5x1)
MAX4729ELT+T FAQ
1.How can I place an order for MAX4729ELT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4729ELT+T 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 MAX4729ELT+T reliable?
The price and inventory of MAX4729ELT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4729ELT+T is usually 5 days.
3.What payment methods are accepted for MAX4729ELT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4729ELT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4729ELT+T?
MAX4729ELT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4729ELT+T 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 MAX4729ELT+T?
For technical support, including MAX4729ELT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4729ELT+T requirements.
6.How does Aetrix verify that MAX4729ELT+T is sourced from the original manufacturer or authorized distributors?
All MAX4729ELT+T 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 MAX4729ELT+T meets industry standards.
7.What is the process for return or replacement of MAX4729ELT+T?
All MAX4729ELT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4729ELT+T, 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 MAX4729ELT+T part is unused and in its original packaging.
Return procedure for MAX4729ELT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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