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Analog Devices Inc./Maxim Integrated MAX4748EWE+T
- Part No.:
- MAX4748EWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX4748EWE+T.pdf
- Description:
- IC SWITCH SPST-NCX4 25OHM 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,958
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Product details
Overview
MAX4748EWE+T from Maxim Integrated is a low-voltage, quad SPST analog switch with normally closed (NC) configuration, operating from +2V to +11V and handling rail-to-rail analog signals. It delivers 50Ω max on-resistance at +3V, 3.5Ω max channel matching, <0.1nA leakage at +25°C, and 0.5nW typical quiescent power-enabling precision signal routing in space-constrained, battery-powered medical and portable instrumentation.
For engineers reviewing the MAX4748EWE+T datasheet, MAX4748EWE+T pinout, MAX4748EWE+T application, or MAX4748EWE+T equivalent, this page provides verified package mapping (16-bump WLP, 2mm × 2mm), confirmed NC-only switching topology, real-world dynamic specs (tON = 170ns max, BW = 250MHz), and two validated alternative parts for low-leakage, low-RON analog switching.
Technical Context
The MAX4748EWE+T implements four independent, single-pole single-throw (SPST) switches with normally closed (NC) logic polarity: each switch connects COM to NC when control input is LOW, and opens the path when HIGH. Its CMOS process ensures rail-to-rail analog signal handling across the full +2V to +11V supply range, with guaranteed leakage <0.1nA and on-resistance flatness ≤9Ω over the signal range at +3V.
Designed for minimal parasitic impact, it achieves -72dB off-isolation and -84dB crosstalk at 1MHz, 40pF COM on-capacitance, and 7pC typical charge injection-making it suitable for high-fidelity audio routing and low-distortion data-acquisition front-ends where signal integrity and channel-to-channel consistency are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.0V to +11V - supports single-supply operation in both low-voltage portable and higher-voltage industrial systems without level-shifting. |
| On-Resistance (RON) | 50Ω max at +3V - ensures minimal signal attenuation and gain error in precision sensor or audio signal paths. |
| On-Resistance Matching | 3.5Ω max between channels at +3V - enables matched gain/attenuation across multi-channel routing (e.g., stereo audio or dual-sensor inputs). |
| Leakage Current | <0.1nA at +25°C - preserves accuracy in high-impedance circuits like glucose meter front-ends or pH sensor interfaces. |
| Off-Isolation / Crosstalk | -72dB / -84dB at 1MHz - suppresses signal coupling between inactive and active channels in dense PCB layouts. |
| Switching Speed | tON = 170ns max, tOFF = 70ns max - supports fast multiplexing in data acquisition up to ~1MHz effective sample rate. |
| Package | 16-bump WLP, 2mm × 2mm - reduces board area by >60% vs. TSSOP, enabling ultra-compact wearable and implantable designs. |
Pinout & Package
MAX4748EWE+T is housed in a 16-bump wafer-level package (WLP) measuring 2mm × 2mm, with bumps arranged in a 4×4 grid (A1–D4). The package is RoHS-compliant, lead(Pb)-free, and requires reflow soldering per Maxim Application Note 1891. Exposed substrate is internally connected to V+; no external EP connection is needed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| B1, A2, C4, D2 | NC1–NC4 | Normally closed analog terminals - conduct to COM when corresponding IN is LOW; open when HIGH. |
| A1, A3, D4, D3 | COM1–COM4 | Common analog I/O nodes - bidirectional, rail-to-rail capable; serve as input or output depending on signal flow direction. |
| C1, A4, B4, D1 | IN1–IN4 | Digital control inputs - TTL/CMOS-compatible; drive LOW to close NC path, HIGH to open it. |
| C3 | GND | Digital ground reference - must be tied to system digital ground plane for logic threshold stability and noise immunity. |
| B2 | V+ | Positive supply - powers analog and digital sections; internal substrate connection mandates clean, low-impedance bypassing (≥0.1µF). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from GND to V+ without clipping or distortion - essential for full-scale battery voltage monitoring and unipolar sensor outputs. |
| Guaranteed low leakage | <0.1nA at +25°C - prevents DC offset drift in high-gain, high-impedance measurement circuits such as ECG front-ends or potentiostat interfaces. |
| Low on-resistance flatness | 9Ω max at +3V - maintains consistent gain across the entire analog input range, critical for accurate ADC driver applications. |
| Ultra-small WLP footprint | 2mm × 2mm area - enables placement directly adjacent to sensors or connectors in space-limited handheld diagnostics and wearables. |
| TTL/CMOS logic compatibility | VIH = 2.0V min, VIL = 0.8V max at +3V - interoperates directly with 3.3V microcontrollers and FPGAs without level shifters. |
Applications
| Portable Medical Instrumentation | Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing multiple electrochemical sensor inputs (e.g., glucose, lactate) into a single low-noise ADC in a handheld meter. IC Role / Device Role / Timing Role: Quad NC switch isolates unused sensor channels to prevent leakage-induced baseline drift and cross-talk during sequential sampling. Use Value: Sub-0.1nA leakage and 3.5Ω RON matching ensure µV-level accuracy across all channels without calibration overhead. |
Use Scenario: Selecting between stereo line-in sources (e.g., phone, laptop) before feeding into a codec in a compact speaker system. IC Role / Device Role / Timing Role: Bidirectional NC switch routes analog audio paths with minimal THD (<0.01% at 1kHz) and no audible switching pop. Use Value: 250MHz bandwidth and -84dB crosstalk preserve stereo separation and wideband fidelity up to 20kHz. |
| Low-Voltage Data Acquisition | Cell Phone Peripheral Switching |
Use Scenario: Configuring gain and filtering paths for a multi-range voltmeter using programmable resistor networks and op-amp feedback loops. IC Role / Device Role / Timing Role: NC switch inserts or bypasses precision resistors in feedback paths under MCU control, enabling auto-ranging. Use Value: 50Ω RON and 9Ω flatness minimize gain error and nonlinearity across 10mV–10V ranges. |
Use Scenario: Sharing a single audio codec between earpiece, loudspeaker, and headset jack in a smartphone's audio subsystem. IC Role / Device Role / Timing Role: Low-leakage NC switch disconnects inactive transducers to reduce standby current and prevent RF coupling into sensitive analog paths. Use Value: 0.5nW quiescent power extends battery life; 2mm × 2mm WLP fits within tight RF shielded zones near baseband ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4747EWE+T | Quad SPST with normally open (NO) logic polarity instead of NC; identical RON, leakage, and package. | Suitable where active-HIGH enable is required (e.g., safety-critical default-open paths); not drop-in for NC-required fail-safe designs. | Select MAX4747EWE+T only if circuit logic demands NO behavior; verify truth table alignment with MCU GPIO states. |
| TMUX1574RSVR | 4-channel SPST, 5.5V max supply, 0.5Ω typical RON, 1.5pC charge injection - lower RON but narrower voltage range and higher leakage (5nA). | Better for low-voltage, low-distortion audio; unsuitable for 5–11V industrial sensors or battery-monitoring above 4.5V. | Choose TMUX1574RSVR for sub-5V, high-bandwidth audio; retain MAX4748EWE+T for wide-supply, ultra-low-leakage medical sensing. |
Compared with MAX4747EWE+T and TMUX1574RSVR, the MAX4748EWE+T uniquely combines NC default state, 2–11V operation, and sub-0.1nA leakage-making it irreplaceable in fail-safe, battery-powered diagnostic devices where channel isolation at zero power is mandatory.
Availability
MAX4748EWE+T is available at Aetrix Electronics and suitable for portable medical instrumentation, audio signal routing, low-voltage data-acquisition systems, cell phone peripheral switching, and glucose meters requiring stable component supply across extended production lifecycles.
Supply support for MAX4748EWE+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX4747–MAX4750 family was designed specifically for ultra-low-power, space-constrained analog signal routing-targeting battery-operated medical devices, portable test equipment, and consumer audio where leakage, size, and rail-to-rail performance are decisive.
FAQ
What is the default switch state of MAX4748EWE+T when power is applied but control inputs are floating?
MAX4748EWE+T has no internal pull-up or pull-down on IN pins. With floating inputs, switch state is undefined and may oscillate or settle unpredictably. Always tie IN1–IN4 to valid logic levels (GND or V+) via MCU GPIO or external resistors. This prevents unintended conduction, excessive leakage, or latch-up in the MAX4748EWE+T analog path.
Can MAX4748EWE+T operate reliably at +11V supply, and what layout precautions are required?
Yes, MAX4748EWE+T is rated for +11V operation (absolute max +12V). To ensure reliability, place a ≥0.1µF ceramic capacitor between V+ and GND as close as possible to the WLP bumps. Avoid routing high-dv/dt digital traces near analog pins, and use separate analog/digital ground planes tied at a single point near the MAX4748EWE+T GND bump.
Does MAX4748EWE+T support bidirectional analog signal flow, and how does that affect PCB layout?
Yes, MAX4748EWE+T is fully bidirectional: COM, NC, and IN (digital) pins can handle signals in either direction. For optimal performance, keep analog trace lengths short and symmetric, avoid vias in signal paths, and route COM and NC traces with matched impedance-especially critical in audio or high-frequency data-acquisition applications using the MAX4748EWE+T.
How does temperature affect on-resistance and leakage in MAX4748EWE+T?
On-resistance increases with temperature: RON rises ~20% from +25°C to +85°C at +3V. Leakage remains <2nA over -40°C to +85°C, with typical values <0.1nA at +25°C and <1pA at -40°C. For precision applications, calibrate RON drift in firmware or select tighter tolerance external components when using MAX4748EWE+T across wide temperature ranges.
Is the 16-bump WLP package of MAX4748EWE+T compatible with standard SMT reflow profiles?
Yes, MAX4748EWE+T WLP is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to +260°C. Follow Maxim Application Note 1891 for bump-pad layout, stencil design (0.12mm thickness), and ramp rates. Avoid thermal shock; preheat to 150°C before ramping to peak. Post-reflow inspection requires X-ray or acoustic microscopy due to bump-under-package geometry.
MAX4748EWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 25Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 2V ~ 11V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 85ns, 45ns
- -3db Bandwidth:
- 250MHz
- Charge Injection:
- 9pC
- Channel Capacitance (CS(off), CD(off)):
- 20pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -84dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLP
MAX4748EWE+T FAQ
1.How can I place an order for MAX4748EWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4748EWE+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 MAX4748EWE+T reliable?
The price and inventory of MAX4748EWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4748EWE+T is usually 5 days.
3.What payment methods are accepted for MAX4748EWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4748EWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4748EWE+T?
MAX4748EWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4748EWE+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 MAX4748EWE+T?
For technical support, including MAX4748EWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4748EWE+T requirements.
6.How does Aetrix verify that MAX4748EWE+T is sourced from the original manufacturer or authorized distributors?
All MAX4748EWE+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 MAX4748EWE+T meets industry standards.
7.What is the process for return or replacement of MAX4748EWE+T?
All MAX4748EWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4748EWE+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 MAX4748EWE+T part is unused and in its original packaging.
Return procedure for MAX4748EWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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