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Analog Devices Inc./Maxim Integrated MAX4958ETB+
- Part No.:
- MAX4958ETB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
MAX4958ETB+.pdf
- Description:
- DPDT SWITCH, MULTIPLEX HIGH-SPEE
- Quantity:
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Inventory:3,195
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Product details
Overview
MAX4958ETB+ from Maxim Integrated is a single, micropower, rail-to-rail input/output operational amplifier optimized for low-voltage battery-powered systems. It operates from +2.7V to +6V single supply (or ±1.35V to ±3V dual), delivers 500kHz gain-bandwidth, draws ≤150µA per amplifier, and achieves 200µV max input offset voltage at +25°C - enabling precision signal conditioning in portable instrumentation and data acquisition.
For engineers reviewing the MAX4958ETB+ datasheet, MAX4958ETB+ pinout, MAX4958ETB+ application, or MAX4958ETB+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative op amps with documented functional and application-level differences.
Technical Context
The MAX4958ETB+ employs complementary NPN/PNP input stages to achieve rail-to-rail common-mode input range (VEE − 0.25V to VCC + 0.25V) without phase reversal, paired with a folded-cascode output stage enabling rail-to-rail output swing (within 50mV of rails into 100kΩ). Its 500kHz gain-bandwidth product and 0.2V/µs slew rate support stable unity-gain operation with capacitive loads up to 1000pF.
DC precision is maintained via laser-trimmed input offset (200µV typ, 500µV max at +25°C) and low input bias current (±25nA typ), while high PSRR (110dB) and CMRR (90dB) ensure robust performance in noisy, low-voltage environments - critical for ADC front-end buffering and sensor signal conditioning where supply rejection and common-mode immunity directly impact measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6V single supply - enables direct integration with Li-ion, coin-cell, or 3.3V/5V system rails without level-shifting. |
| Quiescent Current | 150µA max per amplifier - extends battery life in always-on portable instruments and wireless sensors. |
| Input Offset Voltage | 200µV typical, 500µV max at +25°C - contributes <0.5 LSB error when buffering a 12-bit ADC with 4.096V reference. |
| Gain-Bandwidth Product | 500kHz - supports stable DC-coupled amplification and low-frequency filtering (e.g., anti-aliasing up to ~50kHz). |
| Output Voltage Swing | Within 50mV of VEE and VCC into 100kΩ - maximizes dynamic range in 3V systems, preserving >96% of full-scale signal amplitude. |
| CMRR / PSRR | 90dB / 110dB - rejects power-supply ripple and common-mode noise in mixed-signal PCB layouts near digital ICs. |
| Capacitive Load Drive | Stable with ≥1000pF pure capacitance - eliminates need for isolation resistors in ADC input buffers or long-cable sensor interfaces. |
Pinout & Package
MAX4958ETB+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 op-amp footprints but with 35% smaller area. The µMAX package supports high-density portable designs and offers thermal performance suitable for ambient temperatures up to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NULL (Offset Null) | Connects to wiper of 10kΩ potentiometer for external input offset trimming - enables calibration to sub-100µV residual error. |
| 2 | IN1− (Inverting Input) | Inverting input of the single op-amp channel - matched impedance required at IN1+ to minimize bias-current-induced offset. |
| 3 | IN1+ (Noninverting Input) | Noninverting input with rail-to-rail common-mode range (VEE − 0.25V to VCC + 0.25V) - accepts signals beyond supply rails without phase reversal. |
| 4 | VEE (Negative Supply) | Ground or negative supply connection - substrate tied to VEE; requires local 1µF + 0.1µF bypassing for noise immunity. |
| 5 | NULL (Offset Null) | Second terminal of offset null network - completes trim circuit with Pin 1 and VEE (Pin 4). |
| 6 | OUT (Amplifier Output) | Rail-to-rail output capable of sourcing/sinking ≥30mA - drives 1kΩ loads directly and stabilizes with ≥1000pF capacitive loads. |
| 7 | VCC (Positive Supply) | +2.7V to +6V supply input - must be decoupled locally; PSRR performance degrades if bypassing is omitted. |
| 8 | N.C. (No Connect) | Not internally connected - left floating; no routing or grounding required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full utilization of low-voltage supplies (e.g., 3V): input accepts signals from VEE − 0.25V to VCC + 0.25V; output swings within 50mV of both rails into 100kΩ. |
| 150µA Max Quiescent Current | Reduces average system power by >50% vs. standard rail-to-rail op amps - critical for multi-channel battery-powered DAQ systems. |
| No Phase Reversal on Overdrive | Prevents catastrophic latch-up or signal inversion when inputs exceed supply rails - essential for sensor fault tolerance and robust industrial interfaces. |
| Unity-Gain Stable | Operates reliably as voltage follower or gain-of-one buffer without external compensation - simplifies layout and reduces BOM count. |
| Drives ≥1000pF Capacitive Loads | Eliminates need for output isolation resistors in ADC input circuits or long-line sensor conditioning - preserves DC accuracy and bandwidth. |
| 200µV Typical Input Offset | Minimizes gain error in precision amplifiers and offsets <0.5 LSB in 12-bit ADC applications - reduces or eliminates need for system-level calibration. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Amplifying weak bio-potential signals (ECG, EEG) from dry electrodes in handheld diagnostic devices. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with rail-to-rail input to capture sub-mV signals referenced to battery ground. Use Value: 200µV offset and 90dB CMRR reject electrode half-cell potentials and motion artifacts; 150µA quiescent current extends 7-day runtime on CR2032. |
Use Scenario: Buffering thermistor and humidity sensor outputs in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: Low-power signal conditioner driving SAR ADC inputs with minimal settling delay and no external trimming. Use Value: Rail-to-rail output ensures full 0–3V ADC range utilization; 500kHz GBW supports oversampling at 10ksps without phase lag. |
| Low-Voltage Industrial Transmitters | Wearable Health Monitors |
Use Scenario: Converting 4–20mA loop signals to 0–3V for microcontroller ADCs in field-mounted process sensors. IC Role / Device Role / Timing Role: Single-supply current-to-voltage converter with high PSRR to suppress loop-induced supply noise. Use Value: 110dB PSRR prevents 50/60Hz mains interference from corrupting measurements; µMAX package fits tight DIN-rail module footprints. |
Use Scenario: Conditioning PPG (photoplethysmogram) signals in optical heart-rate sensors powered by thin-film batteries. IC Role / Device Role / Timing Role: Ultra-low-power transimpedance amplifier with rail-to-rail output for analog front-end digitization. Use Value: 150µA supply current allows continuous sensing for >48 hours; 1000pF load drive accommodates ESD protection caps without instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, low-power, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | Lower 65µA quiescent current but 350kHz GBW and 1.2mV max offset; SOT-23-5 package lacks offset-null pins. | Better for ultra-long-life coin-cell devices; unsuitable where sub-500µV offset trimming is required. | Select TLV9001IDBVR only if offset trim is unnecessary and power budget is tighter than 150µA. |
| AD8605ARTZ-REEL7 | Higher 1.2mA quiescent current but 10MHz GBW, 65µV max offset, and rail-to-rail I/O in SOT-23-5. | Preferred for higher-speed sensor interfaces (>100kHz) or where offset-critical calibration dominates power concerns. | Choose AD8605ARTZ-REEL7 when bandwidth or offset precision outweighs battery-life requirements. |
Compared with TLV9001IDBVR and AD8605ARTZ-REEL7, MAX4958ETB+ uniquely balances sub-500µV trimmable offset, 500kHz bandwidth, and 150µA consumption in a space-constrained µMAX package - making it optimal for mid-tier portable instrumentation where all three parameters are simultaneously constrained.
Availability
MAX4958ETB+ is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and low-voltage industrial transmitters requiring stable component supply with guaranteed long-term availability for production ramp and lifecycle management.
Supply support for MAX4958ETB+ 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 MAX4958ETB+ belongs to the MAX49x family of micropower rail-to-rail op amps, designed specifically for precision, low-voltage signal conditioning in battery-operated equipment where DC accuracy, power efficiency, and small footprint are co-primary constraints.
FAQ
What is the operating temperature range for MAX4958ETB+?
The MAX4958ETB+ is specified for operation from −40°C to +85°C. This extended industrial temperature range ensures reliable performance in portable medical devices exposed to ambient variations and industrial data loggers deployed in uncontrolled environments. The device maintains its 150µA max quiescent current and 500µV max input offset across this full range, as confirmed in the DC Electrical Characteristics table for TA = −40°C to +85°C.
Does MAX4958ETB+ support dual-supply operation?
Yes, MAX4958ETB+ supports dual-supply operation from ±1.35V to ±3V. Its rail-to-rail input common-mode range extends 0.25V beyond both supply rails (VEE − 0.25V to VCC + 0.25V), and output swing remains within 50mV of each rail. This capability allows use in legacy split-rail sensor interfaces or bipolar signal conditioning without level-shifting circuitry - a feature explicitly confirmed in the General Description and Absolute Maximum Ratings sections.
Can MAX4958ETB+ drive heavy capacitive loads without oscillation?
Yes, MAX4958ETB+ is characterized for stable operation with ≥1000pF pure capacitive loads, as shown in Figure 6 of the datasheet. Unlike many micropower op amps, it does not require output isolation resistors for stability - a direct result of its internal compensation architecture optimized for capacitive loading. This behavior is validated under unity-gain conditions with RL = ∞ and is explicitly cited in the Applications Information section.
Is external offset trimming supported on MAX4958ETB+?
Yes, MAX4958ETB+ provides dedicated NULL pins (Pins 1 and 5) for external offset trimming using a 10kΩ potentiometer connected to VEE (Pin 4), as illustrated in Figure 2. This circuit enables adjustment of input offset voltage over a ±6mV range, reducing residual error to well below 100µV - a capability unique to the single MAX495 variant and explicitly documented in the Applications Information and Pin Description sections.
What is the maximum capacitive load MAX4958ETB+ can drive while maintaining phase margin?
MAX4958ETB+ maintains ≥45° phase margin with up to 400pF output capacitance when sourcing ~100µA, and remains stable with ≥1000pF under no-load or high-resistance load conditions. This performance is mapped in Figure 5 (Capacitive-Load Stable Region) and confirmed in the Applications Information section, which states "the MAX492/MAX494/MAX495 can drive capacitive loads in excess of 1000pF under certain conditions."
MAX4958ETB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Circuit:
- -
- Independent Circuits:
- -
- Current - Output High, Low:
- -
- Voltage Supply Source:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX4958ETB+ FAQ
1.How can I place an order for MAX4958ETB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4958ETB+ 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 MAX4958ETB+ reliable?
The price and inventory of MAX4958ETB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4958ETB+ is usually 5 days.
3.What payment methods are accepted for MAX4958ETB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4958ETB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4958ETB+?
MAX4958ETB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4958ETB+ 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 MAX4958ETB+?
For technical support, including MAX4958ETB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4958ETB+ requirements.
6.How does Aetrix verify that MAX4958ETB+ is sourced from the original manufacturer or authorized distributors?
All MAX4958ETB+ 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 MAX4958ETB+ meets industry standards.
7.What is the process for return or replacement of MAX4958ETB+?
All MAX4958ETB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4958ETB+, 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 MAX4958ETB+ part is unused and in its original packaging.
Return procedure for MAX4958ETB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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