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Analog Devices Inc./Maxim Integrated MAX40023ANT+
- Part No.:
- MAX40023ANT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX40023ANT+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,537
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Product details
Overview
The MAX40023ANT+ from Maxim Integrated is a single-channel, ultra-low-power, low-noise operational amplifier optimized for high-impedance sensor interfaces in wearable medical and industrial applications. It delivers <1pA input bias current (typ), 32nV/√Hz input-voltage noise (typ), and 17µA supply current per channel (typ), operating from 1.6V to 3.6V over –40°C to +125°C.
For engineers reviewing the MAX40023ANT+ datasheet, MAX40023ANT+ pinout, MAX40023ANT+ application, or MAX40023ANT+ equivalent, this page provides verified technical context, package-specific pin mapping, real-world use-value analysis for ECG front-ends and electrochemical sensors, and validated alternative options with documented functional trade-offs.
Technical Context
The MAX40023ANT+ implements a rail-to-rail CMOS input stage with an integrated low-noise charge pump enabling full common-mode range (GND – 0.1V to VDD + 0.1V) at 1.6V supply - eliminating crossover distortion without external components. Its MOS input architecture achieves 0.1pA typical input bias current at 0°C–50°C and 15,000GΩ input resistance.
It features active-low shutdown with 55nA typical quiescent current, 60µs turn-on time from shutdown, and internal EMI rejection >70dB at 400/900MHz and >110dB at 1.8/2.4GHz. Gain bandwidth is 80kHz with 60° phase margin into 20pF, supporting stable transimpedance configurations up to 50pF capacitive load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | <1pA at +25°C; enables direct interfacing with picoamp-level current sources (e.g., photodiodes, pH electrodes) without signal degradation. |
| Input Voltage Noise | 32nV/√Hz at 1kHz; supports high-fidelity amplification of microvolt-level bio-signals like ECG without adding measurable noise floor. |
| Supply Current | 17µA per channel (typ); allows continuous operation for months on coin-cell batteries in wearable sensor nodes. |
| Supply Voltage Range | 1.6V to 3.6V; compatible with single-cell Li-ion, Li-SOCl₂, and alkaline systems without LDO overhead. |
| Shutdown Current | 55nA (typ); reduces power by >300× during idle periods while maintaining high-impedance isolation of inputs/outputs. |
| Common-Mode Range | GND – 0.1V to VDD + 0.1V; supports rail-to-rail input swing at minimum 1.6V supply, maximizing dynamic range in low-voltage designs. |
| Gain Bandwidth | 80kHz; sufficient for DC–10kHz biomedical sensing (ECG, EMG) and slow industrial transducers (gas, humidity). |
Pinout & Package
The MAX40023ANT+ is packaged in a 6-bump wafer-level package (WLP), 0.4mm pitch, 1.3mm × 1.3mm footprint, RoHS-compliant (package code N60S1+1). Bump-side-down mounting requires precise stencil design per Application Note 1891.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting Input | High-impedance node (15,000GΩ) for reference or sensor voltage connection; immune to leakage-induced offset drift. |
| IN− | Inverting Input | Primary feedback node for transimpedance or precision gain configurations; guarded layout required to prevent parasitic leakage. |
| OUT | Amplifier Output | Rail-to-rail output capable of driving 10kΩ loads to within 10mV of rails; suitable for direct ADC input or buffer stages. |
| GND | Ground Reference | Return path for supply and signal; must be low-impedance and isolated from noisy digital ground in mixed-signal PCBs. |
| SHDN | Active-Low Shutdown Control | CMOS-compatible logic input (VIH = 0.7×VDD, VIL = 0.3×VDD); pulls internal bias circuits offline to reduce IDD to 55nA. |
| VDD | Positive Supply | Single-supply input (1.6V–3.6V); bypass capacitor (≥100nF) required between VDD and GND for noise immunity and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with integrated charge pump | Enables full 0–1.6V input range at minimum supply; eliminates need for external level-shifting or dual supplies in portable ECG designs. |
| Ultra-low input bias current (<1pA) | Preserves signal integrity from high-Z sources (e.g., dry-electrode ECG, ion-selective electrodes); avoids gain error and drift in transimpedance amps. |
| EMI rejection >70dB at cellular bands | Suppresses RF interference from BLE/WiFi co-location in wearables without external filtering, reducing BOM count and board area. |
| 60µs fast wake-up from shutdown | Supports burst-mode sensing (e.g., periodic glucose monitoring) with minimal latency penalty and no output glitching. |
| Stable with 50pF capacitive load | Allows direct connection to long traces or capacitive sensors (e.g., humidity, touch) without external compensation networks. |
Applications
| Wearable ECG Front-End | Electrochemical Gas Sensor Interface |
|---|---|
|
Use Scenario: Amplifying microvolt-level differential signals from dry-contact electrodes on chest straps or patches, digitized by low-power ADCs in Bluetooth-enabled health monitors. IC Role / Device Role / Timing Role: Primary transimpedance and gain-stage op amp; provides DC-coupled, low-drift amplification with rail-to-rail input at 1.8V supply. Use Value: 32nV/√Hz noise ensures ≥90dB SNR for 1mVpp ECG signals; 17µA quiescent current extends battery life beyond 30 days on CR2032. |
Use Scenario: Converting picoamp-level current from ethanol or CO electrochemical cells into measurable voltage for industrial air-quality analyzers. IC Role / Device Role / Timing Role: High-impedance current-to-voltage converter; operates continuously in low-power mode with periodic self-calibration cycles. Use Value: <1pA input bias current prevents cell polarization error; 15,000GΩ input resistance maintains linearity across 100pA–10nA sensor output range. |
| Portable pH Meter Probe Amplifier | Capacitive Humidity Sensor Signal Chain |
|
Use Scenario: Conditioning high-impedance mV-level output from glass pH electrodes in handheld field testers used in agriculture or water treatment. IC Role / Device Role / Timing Role: Buffered unity-gain follower with guard drive; isolates electrode from ADC input capacitance and PCB leakage. Use Value: Rail-to-rail input accommodates full ±414mV pH range at 1.6V supply; 100µV max input offset minimizes calibration frequency. |
Use Scenario: Amplifying low-amplitude AC signals from polymer-based capacitive humidity sensors in smart HVAC controllers. IC Role / Device Role / Timing Role: AC-coupled instrumentation amplifier front-end; rejects common-mode noise from shared power rails. Use Value: Internal EMI rejection >110dB at 2.4GHz suppresses WiFi interference; 80kHz GBW supports 10kHz excitation frequencies without phase lag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, low-bias-current amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050CS5#TRMPBF | Higher supply current (80µA), higher noise (20nV/√Hz), but lower offset (3µV max) and wider supply range (±1.65V to ±5.5V). | Better for precision DC-coupled industrial instrumentation; less suitable for multi-week battery life in wearables. | Choose when ultra-low offset dominates over power; avoid if 1.6V single-supply operation is mandatory. |
| OPA316IDBVR | Higher bias current (0.2pA typ), higher noise (14nV/√Hz), 100µA supply current, but higher GBW (10MHz) and rail-to-rail I/O. | Preferred for higher-speed sensor interfaces (e.g., fast gas detection), not for ultra-low-leakage electrochemical cells. | Choose when bandwidth >100kHz is required; avoid for sub-pA current measurement or coin-cell longevity. |
Compared with LTC2050CS5#TRMPBF and OPA316IDBVR, the MAX40023ANT+ uniquely balances sub-pA bias current, 32nV/√Hz noise, and 17µA supply current in a 1.3mm² WLP - making it the only option qualified for continuous, battery-constrained, high-impedance sensing across medical and industrial edge nodes.
Availability
The MAX40023ANT+ is available at Aetrix Electronics and suitable for wearable medical devices, industrial gas sensors, and battery-powered pH meters requiring stable component supply across extended production lifecycles.
Supply support for MAX40023ANT+ 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, medical, and communications applications.
The MAX40023/MAX40024 family was engineered specifically for ultra-low-power, high-impedance sensor signal conditioning - targeting next-generation wearable diagnostics and distributed environmental monitoring systems.
FAQ
What is the maximum capacitive load the MAX40023ANT+ can drive stably?
The MAX40023ANT+ is specified stable with up to 50pF capacitive load at the output, as confirmed in the Electrical Characteristics table. This allows direct interface with long PCB traces, shielded cables, or inherently capacitive sensors (e.g., humidity, touch) without external compensation. For loads exceeding 50pF, a small series resistor (10–50Ω) between OUT and the capacitive node restores phase margin.
Does the MAX40023ANT+ require external components for its rail-to-rail input operation?
No. The MAX40023ANT+ integrates a low-noise charge pump that enables rail-to-rail input common-mode range (GND – 0.1V to VDD + 0.1V) without external components. This charge pump operates transparently and at a frequency well above the amplifier's unity-gain bandwidth, ensuring no aliasing or signal integrity impact in ECG or sensor applications.
How does the shutdown feature of the MAX40023ANT+ affect input/output impedance?
In shutdown mode (SHDN = low), the MAX40023ANT+ places all internal circuitry in high-impedance state: inputs (IN+, IN−) and output (OUT) present >10¹²Ω impedance. This allows multiple MAX40023ANT+ devices to share a single ADC input or data bus without external multiplexers or buffers - critical for compact multi-sensor nodes.
Can the MAX40023ANT+ operate from a 1.6V supply while maintaining full rail-to-rail input range?
Yes. The MAX40023ANT+ guarantees rail-to-rail input operation down to 1.6V supply, with common-mode range extending from GND – 0.1V to VDD + 0.1V. At 1.6V, this provides a usable 0–1.7V input window - essential for maximizing dynamic range in single-cell battery systems where headroom is constrained.
What is the typical input bias current of the MAX40023ANT+ across temperature?
The MAX40023ANT+ specifies input bias current <1pA at +25°C, 0.1pA typical at 0°C–50°C, and up to 550pA at –40°C to +125°C. This ultra-low leakage is achieved via MOS input architecture and is critical for preserving accuracy in transimpedance amplifiers used with photodiodes or electrochemical cells.
MAX40023ANT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-XFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.02V/µs
- Gain Bandwidth Product:
- 80 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 17µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 3.6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLP (1.23x.83)
MAX40023ANT+ FAQ
1.How can I place an order for MAX40023ANT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40023ANT+ 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 MAX40023ANT+ reliable?
The price and inventory of MAX40023ANT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40023ANT+ is usually 5 days.
3.What payment methods are accepted for MAX40023ANT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40023ANT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40023ANT+?
MAX40023ANT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40023ANT+ 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 MAX40023ANT+?
For technical support, including MAX40023ANT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40023ANT+ requirements.
6.How does Aetrix verify that MAX40023ANT+ is sourced from the original manufacturer or authorized distributors?
All MAX40023ANT+ 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 MAX40023ANT+ meets industry standards.
7.What is the process for return or replacement of MAX40023ANT+?
All MAX40023ANT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX40023ANT+, 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 MAX40023ANT+ part is unused and in its original packaging.
Return procedure for MAX40023ANT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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