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Analog Devices Inc./Maxim Integrated MAX4077ESA+
- Part No.:
- MAX4077ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4077ESA+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,233
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Product details
Overview
MAX4077ESA+ from Maxim Integrated is a dual-channel, open-loop, unity-gain-stable rail-to-rail operational amplifier in an 8-pin SO package, operating from +2.5V to +5.5V single supply with 34µA per amplifier supply current, 230kHz gain-bandwidth product, and input common-mode range extending from 150mV below VEE to within 1.2V of VCC - used in portable battery-powered instrumentation and low-side current-sense signal conditioning.
For engineers reviewing the MAX4077ESA+ datasheet, MAX4077ESA+ pinout, MAX4077ESA+ application, or MAX4077ESA+ equivalent, this page delivers verified technical context, pin-level design meaning, real-world application mappings, and validated alternative options for space-constrained, micropower analog signal paths requiring stable DC accuracy and capacitive-load tolerance up to 100pF.
Technical Context
The MAX4077ESA+ implements two independent, unity-gain-compensated op amp cores optimized for low-power operation and rail-to-rail output swing into 1kΩ loads. Its input stage supports common-mode voltages from (VEE − 0.15V) to (VCC − 1.2V), enabling direct interfacing with sensors and ADC references in single-supply systems.
Each amplifier features 200pA max input bias current, 1.2mV typical input offset voltage, and stability with ≥100pF capacitive loads without external isolation resistors - critical for driving ADC input filters or long PCB traces in portable measurement devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - enables direct integration with Li-ion, coin-cell, and 3.3V/5V system rails without level-shifting. |
| Supply Current (per amp) | 40µA typ at VCC = 3V - supports >10-year battery life in always-on sensor nodes and smart-card readers. |
| Gain-Bandwidth Product | 230kHz - provides usable bandwidth for DC-coupled current sensing and slow-varying sensor signals (e.g., thermistors, strain gauges). |
| Input Bias Current | 1pA min, 200pA max - minimizes voltage error across high-impedance sources like photodiodes and pH electrodes. |
| Input Common-Mode Range | (VEE − 0.15V) to (VCC − 1.2V) - allows direct connection to ground-referenced sensors and rail-split bias networks. |
| Output Swing (RL = 1kΩ) | VOL ≤ 25mV above VEE, VOH ≥ VCC − 100mV - ensures full dynamic range utilization with 12-bit+ SAR ADCs. |
| Capacitive Load Stability | Stable with up to 100pF - eliminates need for output series resistors when driving anti-aliasing filters or long traces. |
Pinout & Package
MAX4077ESA+ uses an 8-pin SO (Small Outline) package with standard dual-op-amp pinout and no internal gain-setting resistors - unlike MAX4074/MAX4075, it is an open-loop device requiring external feedback.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A output | Rail-to-rail output capable of sourcing/sinking ±20mA; drives 1kΩ load while maintaining DC accuracy. |
| 2 (INA−) | Amplifier A inverting input | High-impedance node; connects to feedback network or sensor return path in inverting configurations. |
| 3 (INA+) | Amplifier A noninverting input | High-impedance node; accepts reference voltage or sensor signal; protected by 5kΩ series resistor. |
| 4 (VEE) | Negative supply / ground | Reference for both amplifiers; must be connected to system ground or negative rail; supports single/dual supply operation. |
| 5 (INB+) | Amplifier B noninverting input | Independent high-Z input; enables dual-channel signal conditioning (e.g., differential pair or dual-sensor interface). |
| 6 (INB−) | Amplifier B inverting input | Independent high-Z input; supports separate feedback for second channel without crosstalk. |
| 7 (OUTB) | Amplifier B output | Fully independent rail-to-rail output; measured crosstalk < −115dB at 10kHz ensures channel isolation in precision applications. |
| 8 (VCC) | Positive supply | Power rail for both amplifiers; requires 0.1µF ceramic bypass capacitor placed adjacent to pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain-stable open-loop architecture | Enables flexible gain configuration via external resistors - supports inverting, noninverting, differential, and instrumentation topologies. |
| Rail-to-rail output swing into 1kΩ | Maintains >99% of supply rail-to-rail range under load - maximizes SNR when driving successive-stage ADCs or comparators. |
| 200pA max input bias current | Reduces offset error to <1µV in 10MΩ source impedance applications - critical for photodiode preamps and high-Z sensor interfaces. |
| Stable with 100pF capacitive loads | Eliminates need for output isolation resistors in filter-driven designs - preserves phase margin and step response fidelity. |
| Low 34µA supply current per amplifier | Enables dual-channel analog front-end in ultra-low-power systems - e.g., wearable ECG monitors with continuous sampling. |
Applications
| Portable Battery-Powered Equipment | Instruments, Terminals, and Bar-Code Readers |
|---|---|
Use Scenario: Signal conditioning for micro-power gas sensors and environmental monitors powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Dual-channel op amp providing low-noise amplification and level-shifting for analog sensor outputs prior to ADC sampling. Use Value: 34µA per amplifier enables multi-day operation on single coin cell; rail-to-rail output ensures full ADC code utilization across varying supply voltage. |
Use Scenario: Amplifying low-amplitude bar-code scanner photodiode signals in handheld retail terminals. IC Role / Device Role / Timing Role: First-stage transimpedance amplifier with adjustable gain, followed by buffer for digitization. Use Value: 200pA input bias current prevents signal loss across high-value feedback resistors; 100pF load stability supports integrated RC filtering without oscillation. |
| Keyless Entry Receivers | Low-Side Current-Sense Amplifiers |
Use Scenario: Amplifying weak RF envelope signals from ASK/OOK receivers in automotive key fob receivers. IC Role / Device Role / Timing Role: AC-coupled noninverting amplifier with precise gain setting for demodulated baseband pulses. Use Value: Input common-mode range down to VEE − 0.15V allows direct coupling to detector diode outputs without bias shift; low THD (<−70dB) preserves pulse integrity. |
Use Scenario: Measuring motor or LED load current via shunt resistor in battery management ICs and smart lighting controllers. IC Role / Device Role / Timing Role: High-precision, low-drift difference amplifier configured as current-sense circuit with matched external resistors. Use Value: 1.2mV input offset voltage limits current measurement error to <0.5% at 100mΩ shunt; rail-to-rail output accommodates wide dynamic range of load currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, micropower, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher supply current (550µA/amp), 6.4MHz GBW, wider supply range (2.7–6V), but no guaranteed 100pF capacitive-load stability. | Better for higher-speed signal chains; unsuitable for <50µA battery-life targets or unbuffered filter driving. | Select TLV2462IDR only when bandwidth >1MHz is required and power budget permits 15× higher ICC. |
| OPA2333AIDR | Zero-drift architecture (0.02µV/°C offset drift), 35µA/amp, but limited CMRR (102dB) and no specified 100pF load stability. | Superior DC precision for thermocouple or bridge sensor apps; less robust in noisy, capacitive environments. | Choose OPA2333AIDR for sub-µV offset drift requirements; avoid where layout introduces >50pF trace capacitance. |
Compared with TLV2462IDR and OPA2333AIDR, the MAX4077ESA+ uniquely balances ultra-low quiescent current, guaranteed 100pF capacitive-load stability, and rail-to-rail output drive into 1kΩ - making it optimal for cost-sensitive, battery-constrained instrumentation where moderate bandwidth suffices.
Availability
MAX4077ESA+ is available at Aetrix Electronics and suitable for portable battery-powered equipment, low-side current-sense amplifiers, infrared receivers for remote controls, and smart-card readers requiring stable component supply and long-term production continuity.
Supply support for MAX4077ESA+ 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 consumer applications - emphasizing small size, low power, and high reliability.
The MAX4077ESA+ belongs to the GainAmp™ family of micropower op amps, engineered specifically for space-constrained, battery-operated systems needing rail-to-rail performance, low input bias current, and robust capacitive-load handling without external compensation.
FAQ
What is the maximum capacitive load the MAX4077ESA+ can drive without oscillation?
The MAX4077ESA+ is specified stable with capacitive loads up to 100pF without external isolation resistors. This is confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure 9–10). Driving >100pF may cause peaking or ringing; for larger loads, add a 10–100Ω series resistor between OUT and CL. The MAX4077ESA+'s internal compensation ensures predictable phase margin across its full operating range.
Does the MAX4077ESA+ include internal gain-setting resistors like the MAX4074/MAX4075?
No, the MAX4077ESA+ is an open-loop, unity-gain-stable op amp and does not contain internal gain-setting resistors. It requires external feedback components to set gain - unlike the fixed-gain MAX4074/MAX4075 variants. This is explicitly stated in the General Description and Pin Configurations section. The MAX4077ESA+ provides design flexibility for custom gain, filtering, and topology selection.
What is the input common-mode voltage range for the MAX4077ESA+?
The input common-mode voltage range for the MAX4077ESA+ is from (VEE − 0.15V) to (VCC − 1.2V) at TA = +25°C. This allows the device to accept signals near ground in single-supply systems and supports biasing schemes using resistor dividers. The range is verified in the Electrical Characteristics table under "Common-Mode Input Voltage Range" for MAX4076/MAX4077/MAX4078.
Can the MAX4077ESA+ operate from a dual supply?
Yes, the MAX4077ESA+ supports dual-supply operation from ±1.25V to ±2.75V (i.e., total supply 2.5V to 5.5V), as stated in the Applications Information section. In dual-supply mode, VEE connects to the negative rail and VCC to the positive rail. Input and output swing remain rail-to-rail relative to the respective supplies, preserving dynamic range in bipolar signal chains.
What is the typical input offset voltage of the MAX4077ESA+?
The typical input offset voltage of the MAX4077ESA+ is 1.2mV, with a maximum of 3.5mV over temperature (−40°C to +85°C), per the Electrical Characteristics table for MAX4076/MAX4077/MAX4078. This value is measured under standard conditions (VCC = +5V, RL = 1MΩ) and directly impacts DC accuracy in precision amplification and current-sense applications.
MAX4077ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- GainAmp™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.09V/µs
- Gain Bandwidth Product:
- 230 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 1.2 mV
- Current - Supply:
- 45µA (x2 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4077ESA+ FAQ
1.How can I place an order for MAX4077ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4077ESA+ 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 MAX4077ESA+ reliable?
The price and inventory of MAX4077ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4077ESA+ is usually 5 days.
3.What payment methods are accepted for MAX4077ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4077ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4077ESA+?
MAX4077ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4077ESA+ 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 MAX4077ESA+?
For technical support, including MAX4077ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4077ESA+ requirements.
6.How does Aetrix verify that MAX4077ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX4077ESA+ 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 MAX4077ESA+ meets industry standards.
7.What is the process for return or replacement of MAX4077ESA+?
All MAX4077ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4077ESA+, 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 MAX4077ESA+ part is unused and in its original packaging.
Return procedure for MAX4077ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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