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Analog Devices Inc./Maxim Integrated MAX9913EUB+
- Part No.:
- MAX9913EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9913EUB+.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,109
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Product details
Overview
The MAX9913EUB+ from Maxim Integrated is a dual, rail-to-rail input/output operational amplifier with independent active-low shutdown control per channel, optimized for ultra-low-power precision signal conditioning in battery-powered systems. It delivers 200kHz gain-bandwidth, 4µA typical supply current per amplifier, 1pA typical input bias current, and operates from a single 1.8V to 5.5V supply - enabling use in glucose meter front-ends, portable medical sensors, and low-voltage data-acquisition channels.
For engineers reviewing the MAX9913EUB+ datasheet, MAX9913EUB+ pinout, MAX9913EUB+ application, or MAX9913EUB+ equivalent, key selection criteria include its dual-channel shutdown capability, µMAX® 10-pin package footprint, rail-to-rail I/O swing within 5mV of rails (RL = 100kΩ), ±200µV typical input offset voltage, and guaranteed operation across –40°C to +85°C.
Technical Context
The MAX9913EUB+ integrates two independent CMOS op amps sharing a common VDD and VSS, each with dedicated SHDN inputs (SHDNA and SHDNB) that place the respective output into high-impedance state while reducing total supply current to ≤1µA over temperature. Its parallel n- and p-channel input stage enables rail-to-rail common-mode range (VSS – 0.05V to VDD + 0.05V) and >60dB CMRR over full temperature range.
Unity-gain stable with 200kHz GBW, it drives capacitive loads up to 30pF directly; at AV ≥ 10V/V, drive capability extends to 250pF. Input offset voltage is specified ±5mV max over –40°C to +85°C, with ±5µV/°C drift, supporting precision DC-coupled sensing without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 200kHz - supports stable unity-gain buffering and low-frequency filtering up to ~100kHz with phase margin >45° |
| Supply Current (per amp) | 7µA max at +85°C - enables multi-year battery life in coin-cell–powered portable medical devices |
| Input Bias Current | ±30pA max over temperature - preserves accuracy in high-impedance sensor interfaces (e.g., electrochemical electrodes) |
| Rail-to-Rail Output Swing | Within 5mV of VSS/VDD at RL = 100kΩ - maximizes dynamic range in 1.8V–3.3V systems without level-shifting |
| Shutdown Supply Current | 1µA max over temperature - allows independent channel power gating to extend system standby time |
| Input Offset Voltage | ±5mV max over –40°C to +85°C - eliminates need for manual calibration in portable test equipment |
| Channel-to-Channel Isolation | 100dB at DC - prevents crosstalk between dual-sensor channels in glucose or ECG front-ends |
Pinout & Package
The MAX9913EUB+ is housed in a 10-pin µMAX® package (3.0mm × 3.0mm × 0.8mm, 0.5mm pitch), RoHS-compliant and lead(Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUTA | Amplifier A output | High-impedance during SHDNA = low; rail-to-rail swing supports direct ADC driving |
| 2 - INA− | Inverting input, Channel A | Part of parallel CMOS input stage enabling rail-to-rail common-mode range |
| 3 - INA+ | Noninverting input, Channel A | 1pA typical input bias current preserves integrity of microamp-level sensor signals |
| 4 - VSS | Negative supply | Ground reference for both amplifiers; shared return path requires low-impedance layout |
| 5 - SHDNA | Active-low shutdown, Channel A | Logic low (≤0.4V at VDD ≤ 3.6V) disables OUTA and reduces IA supply current to <1µA |
| 6 - INB+ | Noninverting input, Channel B | Independent input for second sensor channel; matched offset <250µV vs. Channel A |
| 7 - INB− | Inverting input, Channel B | Enables differential measurement configurations without external instrumentation amps |
| 8 - SHDNB | Active-low shutdown, Channel B | Separate control allows asymmetric power management (e.g., keep Channel A active, sleep B) |
| 9 - OUTB | Amplifier B output | Same rail-to-rail performance as OUTA; high-Z state prevents loading of shared analog bus |
| 10 - VDD | Positive supply | Accepts 1.8V–5.5V; 95dB PSRR allows direct battery connection without LDO |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown | SHDNA/SHDNB pins reduce total quiescent current to <1µA when both channels disabled - critical for intermittent-sampling architectures |
| Rail-to-rail I/O | Inputs accept VSS – 0.05V to VDD + 0.05V; outputs swing to within 5mV of rails at 100kΩ load - preserves full ADC input range in low-voltage systems |
| Ultra-low input bias current | 1pA typical (±30pA max) enables accurate amplification of high-impedance sources like pH or glucose electrodes without signal corruption |
| Unity-gain stability | Stable with 30pF capacitive load at AV = 1 - simplifies PCB layout for sensor interfaces without isolation resistors |
| Low input offset voltage | ±200µV typical, ±5mV max over temperature - supports DC-coupled designs without auto-zero or chopper circuitry |
Applications
| Glucose Meter Front-End | Portable ECG Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying current from three-electrode glucose sensor (WE/RE/CE) with programmable gain and low-noise filtering. IC Role / Device Role / Timing Role: Dual op amp provides transimpedance conversion on Channel A and reference buffer on Channel B, with independent shutdown to gate power during idle cycles. Use Value: 1pA input bias prevents electrode polarization error; rail-to-rail output drives 12-bit SAR ADC directly from 2.5V supply. |
Use Scenario: Conditioning differential lead-II ECG signals in handheld diagnostic devices with motion artifact rejection. IC Role / Device Role / Timing Role: Channel A configures as high-input-impedance buffer for RA–LA differential pair; Channel B buffers Wilson central terminal reference. Use Value: 100dB channel isolation prevents cross-talk between limb leads; 4µA per amp extends AA-battery life beyond 6 months. |
| Handheld Multimeter Input Stage | IoT Environmental Sensor Hub |
|
Use Scenario: Precision DC amplification and range switching for voltage/current/resistance measurements in pocket-sized DMMs. IC Role / Device Role / Timing Role: Dual amplifier implements programmable-gain instrumentation front-end with auto-ranging control via SHDN pins. Use Value: ±5mV max input offset eliminates need for factory calibration trim; 200kHz GBW supports fast settling for 10ms measurement cycles. |
Use Scenario: Simultaneous amplification of thermistor, humidity, and gas sensor outputs in battery-powered environmental nodes. IC Role / Device Role / Timing Role: One channel conditions thermistor bridge output; second channel buffers capacitive humidity sensor signal with shutdown between readings. Use Value: Independent shutdown reduces average current to 200nA in 1-minute sampling interval; rail-to-rail I/O matches 3.3V MCU ADC range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4475AUA+ | Single 1.8V–5.5V op amp, 10µA supply current, no shutdown, 10-pin µMAX® | Lacks dual-channel and shutdown - suitable only for single-ended, always-on functions | Select only if system requires single amplifier with identical package but no power gating |
| OPA2333AIDR | Dual 1.8V–5.5V op amp, 17µA supply current, zero-drift architecture, SOIC-8 | Higher current, larger package, superior DC accuracy (0.02µV/°C drift) but no shutdown | Prefer for precision DC applications where power budget allows; not drop-in due to pinout and shutdown absence |
Compared with MAX4475AUA+ and OPA2333AIDR, the MAX9913EUB+ uniquely combines dual-channel operation, per-channel shutdown, and sub-5µA quiescent current in a 10-pin µMAX® footprint - making it the only option for space-constrained, intermittently powered dual-sensor systems requiring rail-to-rail I/O and ultra-low bias current.
Availability
The MAX9913EUB+ is available at Aetrix Electronics and suitable for portable medical devices, handheld test equipment, and battery-powered data-acquisition systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX9913EUB+ 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 communications applications.
The MAX9910–MAX9913 family was engineered specifically for ultra-low-power, rail-to-rail signal conditioning in portable battery-operated instrumentation - prioritizing micropower operation, sensor-grade input characteristics, and compact packaging.
FAQ
What is the maximum capacitive load the MAX9913EUB+ can drive without external compensation?
The MAX9913EUB+ is unity-gain stable with capacitive loads up to 30pF when configured for AV = 1V/V. At minimum gain of 10V/V, it safely drives up to 250pF. For loads exceeding 30pF in unity-gain configurations, an isolation resistor (RISO) is required - typical values range from 1kΩ to 6.2kΩ depending on load capacitance. This behavior is confirmed in the "Driving Capacitive Loads" section of the MAX9913EUB+ datasheet.
Does the MAX9913EUB+ support true rail-to-rail input common-mode voltage range?
Yes, the MAX9913EUB+ features a parallel n- and p-channel input stage enabling an input common-mode voltage range from VSS – 0.05V to VDD + 0.05V over the full –40°C to +85°C temperature range. This is verified in the Electrical Characteristics table under "Input Common-Mode Range" and confirmed by the typical operating curves showing stable VOS across VCM.
How does shutdown operation affect output state in the MAX9913EUB+?
When SHDNA or SHDNB is driven low, the corresponding amplifier's output enters a high-impedance state and supply current drops to ≤1µA over temperature. The output remains floating - no internal pull-up/down - so external biasing may be needed if connected to shared buses. This behavior is explicitly documented in the "Shutdown Mode" section and electrical specs for "Output Leakage in Shutdown".
What is the typical power-up settling time for the MAX9913EUB+?
The MAX9913EUB+ requires approximately 5µs to stabilize after VDD ramp-up, as measured from 10% to 90% of final output voltage in a unity-gain buffer configuration. This value is specified in the Typical Operating Characteristics section (Figure toc21) and assumes standard 0.1µF VDD bypassing. Settling is slew-rate limited and scales with output voltage step size.
Can the MAX9913EUB+ operate from a 1.8V supply while maintaining rail-to-rail output swing?
Yes, the MAX9913EUB+ is fully specified from 1.8V to 5.5V. At VDD = 1.8V, it delivers rail-to-rail output swing within 90mV of VSS and VDD at RL = 5kΩ, and within 5mV at RL = 100kΩ - confirmed in the "Output-Voltage-Swing Low/High" specifications for TA = –40°C to +85°C. This enables direct interfacing with 1.8V logic and ADCs.
MAX9913EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.1V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 7µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX9913EUB+ FAQ
1.How can I place an order for MAX9913EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9913EUB+ 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 MAX9913EUB+ reliable?
The price and inventory of MAX9913EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9913EUB+ is usually 5 days.
3.What payment methods are accepted for MAX9913EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9913EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9913EUB+?
MAX9913EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9913EUB+ 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 MAX9913EUB+?
For technical support, including MAX9913EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9913EUB+ requirements.
6.How does Aetrix verify that MAX9913EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX9913EUB+ 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 MAX9913EUB+ meets industry standards.
7.What is the process for return or replacement of MAX9913EUB+?
All MAX9913EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9913EUB+, 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 MAX9913EUB+ part is unused and in its original packaging.
Return procedure for MAX9913EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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