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Analog Devices Inc./Maxim Integrated MAX4470EWT+T
- Part No.:
- MAX4470EWT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WFBGA, WLBGA
- Datasheet:
-
MAX4470EWT+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,708
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Product details
Overview
MAX4470EWT+T from Maxim Integrated is a single-channel, micropower, rail-to-rail output operational amplifier with ground-sensing inputs, operating from +1.8V to +5.5V supply and drawing only 750nA quiescent current. It delivers 9kHz gain-bandwidth, ±500µV input offset voltage (typ), and rail-to-rail output swing within 4mV of supply rails under 100kΩ load - ideal for ultra-low-power sensor signal conditioning in battery-powered pH meters and remote environmental sensors.
For engineers reviewing the MAX4470EWT+T datasheet, MAX4470EWT+T pinout, MAX4470EWT+T application, or MAX4470EWT+T equivalent, this page provides verified technical context, package-specific pin mapping, real-world application constraints, and validated alternative options for low-voltage, nanopower analog front-ends.
Technical Context
The MAX4470EWT+T employs BiCMOS process technology to achieve unity-gain stability with 9kHz gain-bandwidth and 120dB open-loop voltage gain. Its ground-sensing input stage supports common-mode voltages down to VSS (0V), eliminating level-shifting requirements in single-supply sensor interfaces.
It features rail-to-rail output capable of sourcing/sinking ±11mA at +5V, no phase reversal on overdriven inputs, and stable operation driving ≥250pF capacitive loads - enabling direct connection to ADC reference buffers or low-power transducer drivers without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V - enables direct operation from single Li+ or two-cell alkaline batteries without regulation. |
| Supply Current per Amplifier | 750nA (typ) at +5V - extends battery life to years in always-on remote sensor nodes. |
| Gain-Bandwidth Product | 9kHz - sufficient for DC-coupled thermistor, RTD, or pH electrode signal conditioning. |
| Input Offset Voltage | ±500µV (typ), ±7mV (max) - supports 12-bit accuracy in 3.3V systems without trimming. |
| Rail-to-Rail Output Swing | Within 4mV of VDD/VSS at 100kΩ load - maximizes dynamic range for low-voltage ADCs. |
| Input Common-Mode Range | VSS to (VDD − 1.1V) - includes ground, simplifying single-supply transducer interfacing. |
| Capacitive Load Drive | ≥250pF (min) - allows direct buffering of long traces or high-C ADC inputs without instability. |
Pinout & Package
MAX4470EWT+T is housed in a 6-bump Wafer-Level Package (WLP), bottom-side marked "+BP", with footprint optimized for space-constrained portable designs. The WLP exposes solder bumps on the die underside, requiring controlled reflow and precise stencil design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting Input | Accepts ground-referenced sensor signals (e.g., pH electrode output) without level shifters. |
| IN− | Inverting Input | Configures gain/feedback network; supports unity-gain buffer or precision instrumentation topologies. |
| OUT | Amplifier Output | Drives ADC input or low-power display driver with full rail-to-rail swing and ±11mA drive capability. |
| VDD | Positive Supply | Connects to regulated +1.8V–+5.5V source; requires local 0.1µF ceramic bypass capacitor. |
| VSS | Negative Supply / Ground | System ground reference; must be low-impedance to minimize noise coupling into inputs. |
| N.C. | No Connection | Internally unconnected bump - must remain unpopulated and unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 750nA supply current | Enables multi-year battery life in coin-cell-powered IoT edge nodes and wearable health monitors. |
| Ground-sensing input stage | Eliminates need for input biasing resistors or dual supplies when interfacing with grounded sensors (e.g., thermocouples, pH electrodes). |
| No phase reversal on overdrive | Prevents latch-up or erroneous output during transient sensor faults or power-up sequencing. |
| Rail-to-rail output with 11mA drive | Directly drives SAR ADC reference inputs or low-power LCD segment drivers without external buffers. |
| Unity-gain stable, 9kHz GBW | Supports stable DC-coupled amplification of slow-varying signals (e.g., gas sensors, humidity transducers) without external compensation. |
Applications
| pH Meter Front-End | Remote Environmental Sensor Node |
|---|---|
Use Scenario: Amplifying high-impedance mV-level output from glass pH electrode in handheld or field-deployed meter. IC Role / Device Role / Timing Role: Precision DC-coupled buffer and gain stage with ground-referenced input and rail-to-rail output. Use Value: 750nA supply current extends AA battery life beyond 2 years; ±500µV offset enables <0.01pH resolution without calibration drift compensation. |
Use Scenario: Signal conditioning for temperature/humidity sensor in solar-powered wireless weather station. IC Role / Device Role / Timing Role: Low-power sensor interface amplifier powering up only during periodic ADC sampling bursts. Use Value: +1.8V minimum supply allows direct use of harvested solar energy; 250pF capacitive load tolerance ensures stability with long PCB traces to remote sensors. |
| Portable Medical Glucose Monitor | Low-Power Industrial Thermistor Interface |
Use Scenario: Amplifying amperometric current from glucose oxidase biosensor electrode. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current (<1.5nA max) and rail-to-rail output. Use Value: ±200pA input bias current minimizes measurement error in picoampere-range biosensor currents; no phase reversal prevents false readings during electrode insertion transients. |
Use Scenario: Linearizing and amplifying resistance changes from 10kΩ NTC thermistor in battery-operated HVAC controller. IC Role / Device Role / Timing Role: Precision voltage follower feeding 12-bit SAR ADC with minimal power overhead. Use Value: 120dB open-loop gain ensures <0.1% linearity error across -40°C to +85°C; 9kHz bandwidth rejects 50/60Hz interference without external filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4470EXK+T | Same electrical specs; packaged in 5-pin SC70 (top-mark +ABS) instead of 6-bump WLP. | SC70 offers easier manual assembly and standard reflow compatibility vs. WLP's fine-pitch bump layout. | Select MAX4470EXK+T for prototyping or low-volume production where WLP placement capability is unavailable. |
| TLV8801IDCKR | 750nA supply current, 6kHz GBW, rail-to-rail I/O, but input offset voltage ±1.5mV (max) - 2× higher than MAX4470EWT+T. | Lower bandwidth limits use in higher-speed sensor interfaces; higher offset reduces DC accuracy in precision pH or strain gauge apps. | Choose TLV8801IDCKR only when WLP footprint is incompatible and ±1.5mV offset is acceptable for system-level accuracy. |
Compared with MAX4470EXK+T, the MAX4470EWT+T saves board area via WLP but requires advanced assembly; versus TLV8801IDCKR, it delivers tighter offset and higher GBW for demanding DC precision, albeit at Maxim's proprietary package form factor.
Availability
MAX4470EWT+T is available at Aetrix Electronics and suitable for battery-powered pH meters, remote environmental sensor nodes, portable medical glucose monitors, and low-power industrial thermistor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for MAX4470EWT+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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX4470 family targets ultra-low-power, single-supply sensor signal conditioning - delivering nanopower operation, ground-sensing inputs, and rail-to-rail outputs for battery-critical portable instrumentation.
FAQ
What is the operating temperature range for MAX4470EWT+T?
The MAX4470EWT+T is specified for operation from -40°C to +85°C ambient temperature. This industrial-grade range supports deployment in outdoor environmental sensors, automotive cabin modules, and portable medical devices exposed to wide thermal swings. All key parameters - including supply current, input offset voltage, and gain-bandwidth - are guaranteed across this full range per the datasheet's extended-temperature electrical characteristics table.
Does MAX4470EWT+T require external compensation capacitors?
No, the MAX4470EWT+T is internally compensated for unity-gain stability and does not require external compensation capacitors under typical conditions. However, when driving >250pF capacitive loads or operating with significant feedback node capacitance (e.g., long PCB traces), a 2pF–10pF capacitor across the feedback resistor - as shown in Figure 1 of the datasheet - may be needed to maintain phase margin and prevent peaking or oscillation.
Can MAX4470EWT+T drive an ADC input directly?
Yes, the MAX4470EWT+T can directly drive most 12-bit SAR ADC inputs due to its rail-to-rail output swing (within 4mV of rails at 100kΩ), low output impedance, and ≥250pF capacitive load capability. Its 750nA supply current avoids loading the ADC reference, and its 9kHz bandwidth adequately settles for typical 1ksps sampling rates - making it ideal for low-power data acquisition front-ends.
What is the meaning of "N.C." on the MAX4470EWT+T pinout?
"N.C." stands for No Connection - a bump on the MAX4470EWT+T WLP that is not internally connected to any circuitry. It must remain unpopulated and unconnected on the PCB. Soldering or routing to this bump risks shorting adjacent terminals or compromising thermal/mechanical reliability, as confirmed by Maxim's package drawing W61B1+1 and land pattern guidance in Application Note 1891.
How does the input common-mode range of MAX4470EWT+T benefit sensor interfacing?
The MAX4470EWT+T features a ground-sensing input stage with common-mode range extending from VSS (0V) to (VDD − 1.1V). This allows direct connection of grounded sensors - such as pH electrodes, thermocouples, or resistive bridge elements - without level-shifting circuitry or dual supplies, reducing component count, power consumption, and board area in compact portable instruments.
MAX4470EWT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.002V/µs
- Gain Bandwidth Product:
- 9 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 750nA
- Current - Output / Channel:
- 36 mA
- 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:
- 6-WLP (1.24x0.84)
MAX4470EWT+T FAQ
1.How can I place an order for MAX4470EWT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4470EWT+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 MAX4470EWT+T reliable?
The price and inventory of MAX4470EWT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4470EWT+T is usually 5 days.
3.What payment methods are accepted for MAX4470EWT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4470EWT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4470EWT+T?
MAX4470EWT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4470EWT+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 MAX4470EWT+T?
For technical support, including MAX4470EWT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4470EWT+T requirements.
6.How does Aetrix verify that MAX4470EWT+T is sourced from the original manufacturer or authorized distributors?
All MAX4470EWT+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 MAX4470EWT+T meets industry standards.
7.What is the process for return or replacement of MAX4470EWT+T?
All MAX4470EWT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4470EWT+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 MAX4470EWT+T part is unused and in its original packaging.
Return procedure for MAX4470EWT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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