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Analog Devices Inc./Maxim Integrated MAX4993ELB+
- Part No.:
- MAX4993ELB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN
- Datasheet:
-
MAX4993ELB+.pdf
- Description:
- MAX4993 DPDT ANALOG SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,955
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Product details
Overview
The MAX4993ELB+ from Maxim Integrated is a double-pole/double-throw (DPDT) analog switch optimized for high-fidelity audio routing, featuring 0.3Ω typical on-resistance, 0.004% THD+N, and slow turn-on time to suppress click-and-pop in speaker/headset switching applications powered by +1.8V to +5.5V single supply.
For engineers reviewing the MAX4993ELB+ datasheet, MAX4993ELB+ pinout, MAX4993ELB+ application, or MAX4993ELB+ equivalent, this device is selected for low-distortion audio signal path control where DC-biased amplifiers interface with coupling capacitors and speaker loads requiring controlled charge transient management.
Technical Context
The MAX4993ELB+ implements break-before-make DPDT switching with an active-low enable (EN) that places all channels in high-impedance state and reduces supply current to ≤1μA when driven high. Its slow turn-on time (~360ms at VCC = +2.7V) is engineered specifically to limit inrush current into speaker loads during power-up of DC-biased audio amplifiers.
It operates bidirectionally across COM/NO/NC terminals, supports analog signals from 0V to VCC, and maintains 80dB PSRR to reject supply ripple-induced distortion. RON flatness is 1mΩ over full signal range, ensuring minimal harmonic generation in audio band (20Hz–20kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 0.3Ω typ - Enables <10mΩ insertion loss in 16Ω speaker paths, preserving output power integrity. |
| THD+N | 0.004% - Meets high-fidelity audio requirements for portable MP3 players and cellular handsets. |
| Turn-On Time | 360ms max at VCC = +2.7V - Controls capacitor charging rate to eliminate audible transients in headset/speaker switching. |
| Supply Range | +1.8V to +5.5V - Compatible with Li-ion battery (3.0–4.2V), USB-powered (5V), and low-voltage logic systems. |
| Off-Isolation | -90dB at 20kHz - Prevents crosstalk between active and inactive audio channels in multi-source routing. |
| Enable Input Logic | Active-low EN - Allows system-level power gating; high EN disables all switches and cuts ICC to ≤1μA. |
| Operating Temp | -40°C to +85°C - Qualified for industrial and mobile consumer environments without derating. |
Pinout & Package
Package: 10-pin UTQFN (1.4mm × 1.8mm × 0.55mm), RoHS-compliant, exposed pad for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Bypass with 0.1µF capacitor near pin to stabilize rail during fast digital transitions. |
| NO1 (Pin 2) | Switch 1 normally-open terminal | Connects to COM1 only when CB = low; used for alternate audio source selection. |
| COM1 (Pin 3) | Switch 1 common terminal | Must serve as output node for click-and-pop reduction; ties directly to speaker load. |
| CB (Pin 4) | Digital control input (shared) | Single logic line controls both poles; low = connect COMx to NOx, high = connect COMx to NCx. |
| NC1 (Pin 5) | Switch 1 normally-closed terminal | Default path when CB = high; used for standby or default audio path routing. |
| GND (Pin 6) | Ground reference | Connect to PCB ground plane under exposed pad to minimize thermal resistance (θJC = 20.1°C/W). |
| NC2 (Pin 7) | Switch 2 normally-closed terminal | Paired with COM2/NO2 for second DPDT channel; enables stereo or dual-path switching. |
| EN (Pin 8) | Active-low enable | Drives all switches to Hi-Z when high; eliminates signal leakage and reduces quiescent current. |
| COM2 (Pin 9) | Switch 2 common terminal | Second output node; requires identical speaker-load connection as COM1 for pop suppression. |
| NO2 (Pin 10) | Switch 2 normally-open terminal | Completes second pole; synchronized with NO1 via shared CB control. |
Key Features
| Feature | Design Value |
|---|---|
| Slow turn-on time | 360ms max ensures controlled charging of output coupling capacitors, eliminating audible clicks in speaker/headset switching. |
| 0.3Ω on-resistance | Minimizes voltage drop and power loss in 16Ω–32Ω audio loads, preserving amplifier output fidelity and efficiency. |
| 1mΩ RON flatness | Maintains consistent gain and phase response across full audio signal swing (0V to VCC), reducing harmonic distortion. |
| 80dB PSRR | Rejects supply noise from battery or DC-DC converters, preventing ripple modulation of audio signals. |
| Break-before-make switching | Prevents momentary shorting between NC and NO paths, avoiding signal glitches during channel reconfiguration. |
Applications
| Speaker Headset Source Switching | Cellular Phone Audio Routing |
|---|---|
|
Use Scenario: Seamless switching between earpiece, loudspeaker, and Bluetooth headset outputs in a single handset. IC Role / Device Role / Timing Role: DPDT analog switch managing dual-path audio signal routing with controlled turn-on to prevent pop noise during mode changes. Use Value: Eliminates need for external RC snubbers or mute circuits-reduces BOM count while meeting IEC 60950 acoustic emission limits. |
Use Scenario: Dynamic selection of microphone input sources (main mic, secondary mic, or headset mic) based on call context. IC Role / Device Role / Timing Role: Bidirectional DPDT switch enabling flexible input path configuration with low THD+N and high off-isolation. Use Value: Maintains SNR >100dB across all paths; -90dB off-isolation prevents bleed-through from active to inactive mic inputs. |
| Portable MP3 Player Output Selection | Audio Signal Routing in Wearables |
|
Use Scenario: Routing line-out signal to either 3.5mm jack or internal speaker depending on headphone detection status. IC Role / Device Role / Timing Role: High-fidelity analog switch with slow turn-on ensuring zero pop during jack insertion/removal events. Use Value: Achieves <0.004% THD+N at 1VP-P into 32Ω, supporting 24-bit/96kHz playback without added distortion. |
Use Scenario: Managing audio paths between voice assistant processor, bone-conduction transducer, and ambient noise sensor in smart earbuds. IC Role / Device Role / Timing Role: Low-leakage (±100nA off-current), low-capacitance (45pF COFF) DPDT switch minimizing signal degradation in ultra-compact layouts. Use Value: Enables sub-2mm PCB stack height with UTQFN package while maintaining -110dB crosstalk between voice and sensing channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4994ELB+ | No slow turn-on; 150μs tON; same DPDT topology, EN pin, and 0.3Ω RON. | Used where fast switching is required (e.g., dynamic EQ path selection), not click/pop suppression. | Select MAX4994ELB+ only if slow turn-on is unnecessary and microsecond-scale switching is needed. |
| TSM1014IDT | Single SPDT, 0.5Ω RON, no EN pin, no slow turn-on, higher THD+N (0.01%). | Limited to mono/single-path routing; lacks DPDT capability and pop suppression for dual-output systems. | Use TSM1014IDT only for cost-sensitive, non-audio-critical SPDT functions-not as functional replacement for MAX4993ELB+. |
Compared with MAX4994ELB+, the MAX4993ELB+ trades speed for pop-free operation in speaker-coupled systems; versus TSM1014IDT, it delivers true DPDT functionality, lower distortion, and integrated enable control-making it irreplaceable in dual-path audio switching with DC bias constraints.
Availability
MAX4993ELB+ is available at Aetrix Electronics and suitable for speaker headset source switching, cellular phone audio routing, and portable MP3 player output selection requiring stable component supply across industrial temperature ranges and long-lifecycle production programs.
Supply support for MAX4993ELB+ 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 demanding industrial, communications, and consumer applications.
The MAX4993ELB+ belongs to Maxim's high-fidelity audio switch product line, developed specifically to solve click-and-pop in battery-powered portable audio systems using DC-biased amplifiers and coupling capacitors.
FAQ
What is the primary function of the EN pin on the MAX4993ELB+?
The EN pin on the MAX4993ELB+ is an active-low enable input. When driven high, it places all internal switches in high-impedance state and reduces supply current to ≤1μA. This allows system-level power gating without removing VCC. When driven low, the MAX4993ELB+ operates normally under CB control. The EN pin is essential for low-power standby modes in portable devices and must be tied low or actively controlled to enable switching functionality in the MAX4993ELB+.
Does the MAX4993ELB+ support bidirectional signal flow?
Yes, the MAX4993ELB+ supports fully bidirectional analog signal flow across all COM/NO/NC terminals. Signals can pass from COM to NO/NC or vice versa without polarity restriction. However, click-and-pop reduction is only effective when COM pins serve as outputs-driving speaker loads directly-because the slow turn-on mechanism relies on controlled current discharge through the COM node. Bidirectionality does not compromise THD+N (0.004%) or RON flatness (1mΩ) in either direction for the MAX4993ELB+.
How does the slow turn-on time of the MAX4993ELB+ reduce click-and-pop noise?
The MAX4993ELB+ achieves click-and-pop reduction via a deliberately extended turn-on time (~360ms at VCC = +2.7V), which limits inrush current when charging output coupling capacitors in DC-biased audio amplifier circuits. By slowing the voltage ramp at the COM node, it prevents abrupt current spikes into the speaker coil that cause audible transients. This eliminates the need for external mute circuits or RC networks-directly addressing the root cause in architectures where the MAX4993ELB+ interfaces between amplifier and speaker load.
What is the maximum analog signal voltage range supported by the MAX4993ELB+?
The MAX4993ELB+ supports analog signal voltages from 0V to VCC across all NO, NC, and COM terminals. With VCC operating from +1.8V to +5.5V, the usable analog range scales accordingly-for example, 0V to +3.3V at 3.3V supply. Exceeding VCC or going below GND risks violating absolute maximum ratings (e.g., NO/NC/COM must stay within -0.3V to VCC + 0.3V). This rail-to-rail analog range enables direct interfacing with single-supply op-amps and Class AB audio amplifiers without level-shifting for the MAX4993ELB+.
Can the MAX4993ELB+ be used in stereo audio applications?
Yes, the MAX4993ELB+ is explicitly designed for stereo audio applications as a true DPDT switch: COM1/NO1/NC1 handles left-channel signals, while COM2/NO2/NC2 handles right-channel signals, with both poles controlled synchronously by the shared CB input. Its matched RON (<3mΩ inter-channel variation), low crosstalk (-110dB), and identical timing characteristics ensure channel balance and phase coherence-critical for stereo imaging. The MAX4993ELB+'s 0.004% THD+N and 80dB PSRR further preserve stereo fidelity across the full 20Hz–20kHz band.
MAX4993ELB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- DPDT
- Multiplexer/Demultiplexer Circuit:
- 2:2
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 500mOhm
- Channel-to-Channel Matching (ΔRon):
- 3mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 630ms, 2µs
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 45pF
- Current - Leakage (IS(off)) (Max):
- 100nA
- Crosstalk:
- -110dB @ 20kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uDFN (2x2)
MAX4993ELB+ FAQ
1.How can I place an order for MAX4993ELB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4993ELB+ 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 MAX4993ELB+ reliable?
The price and inventory of MAX4993ELB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4993ELB+ is usually 5 days.
3.What payment methods are accepted for MAX4993ELB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4993ELB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4993ELB+?
MAX4993ELB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4993ELB+ 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 MAX4993ELB+?
For technical support, including MAX4993ELB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4993ELB+ requirements.
6.How does Aetrix verify that MAX4993ELB+ is sourced from the original manufacturer or authorized distributors?
All MAX4993ELB+ 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 MAX4993ELB+ meets industry standards.
7.What is the process for return or replacement of MAX4993ELB+?
All MAX4993ELB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4993ELB+, 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 MAX4993ELB+ part is unused and in its original packaging.
Return procedure for MAX4993ELB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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