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Analog Devices Inc./Maxim Integrated MAX4195ESA
- Part No.:
- MAX4195ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4195ESA.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,221
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Product details
Overview
MAX4195ESA from Maxim Integrated is a fixed-gain, rail-to-rail, single-supply instrumentation amplifier with G = +1V/V, 93µA quiescent current, ±0.01% gain error (TYP), and operation from +2.7V to +7.5V. It features shutdown mode (8µA), input common-mode range extending 200mV below ground, and rail-to-rail output swing within 30mV of rails under 25kΩ load - used in precision sensor signal conditioning for thermocouples and bridge transducers.
For engineers reviewing the MAX4195ESA datasheet, MAX4195ESA pinout, MAX4195ESA application, or MAX4195ESA equivalent, this page delivers verified technical context, exact pin functions, real-world use-value per application, confirmed alternatives with documented functional differences, and supply-chain support for industrial and portable medical designs.
Technical Context
The MAX4195ESA implements a three-op-amp topology with on-chip 25kΩ feedback resistors, delivering fixed unity gain without external components. Its input stage supports common-mode voltages from VEE − 0.2V to VCC − 1.1V, and its output stage uses a common-source structure enabling rail-to-rail swing with <30mV headroom into 25kΩ.
Shutdown is controlled via a dedicated SHDN pin that disables internal amplifiers and places the output in high-impedance state, reducing supply current to 8µA. The device operates across −40°C to +85°C and is specified with DC precision including ±50µV input offset voltage (G ≥ +100V/V) and 115dB CMRR at G = +10V/V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +1V/V, fixed - eliminates need for external gain-setting resistor and associated layout sensitivity |
| Supply Current | 93µA typical - enables multi-year battery life in portable medical and sensor nodes |
| Shutdown Current | 8µA typical - allows low-power sleep modes in loop-powered 4–20mA transmitters |
| Input Offset Voltage | ±100µV max (G = +1V/V, TMIN to TMAX) - ensures sub-100µV baseline error in thermocouple amplification |
| CMRR | 95dB min (G = +1V/V, TMIN to TMAX) - rejects power-line interference in noisy industrial environments |
| Bandwidth | 220kHz typical (G = +1V/V) - supports DC to ~100kHz sensor signals without phase distortion |
| Input Voltage Range | VEE − 0.2V to VCC − 1.1V - accepts grounded-sensor inputs while operating from single +3V supply |
| Output Swing | Within 30mV of rails (RL = 25kΩ to VCC/2) - maximizes dynamic range in low-voltage data-acquisition systems |
Pinout & Package
MAX4195ESA is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant. Pin 1 is top-left corner when notch or mark faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Reference voltage input - sets output common-mode level; tied to VCC/2 for symmetric swing or to ADC reference for direct interfacing |
| 2 | IN− | Inverting input - differential input node; high-impedance (1000MΩ) minimizes loading on Wheatstone bridges |
| 3 | IN+ | Noninverting input - differential input node; matched to IN− for optimal CMRR |
| 4 | VEE | Negative supply - connects to ground in single-supply operation; supports dual ±1.35V to ±3.75V |
| 5 | FB | Feedback terminal - internally connected to OUT; not user-accessible in MAX4195ESA (fixed-gain variant) |
| 6 | OUT | Amplifier output - rail-to-rail capable; drives 25kΩ load to within 30mV of VCC or VEE |
| 7 | VCC | Positive supply - accepts +2.7V to +7.5V; bypassing with 0.1µF capacitor required for stability |
| 8 | SHDN | Shutdown control - logic-low (≤ VCC − 2.5V) activates 8µA shutdown; high-impedance output state prevents loading downstream stages |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full-scale swing into 25kΩ load - preserves SNR in low-voltage ADC front-ends |
| Single-supply operation down to +2.7V | Enables direct interface with Li-ion (3.0V nominal) or coin-cell (3V) powered devices |
| 200mV below-ground input common-mode range | Accepts grounded thermocouple or shunt-based current sense signals without level-shifting circuitry |
| 8µA shutdown current | Reduces system standby power by >90% - critical for energy-harvesting and wireless sensor nodes |
| ±0.01% gain error (TYP) at G = +1V/V | Eliminates factory calibration for many industrial sensor modules using 12-bit or 14-bit ADCs |
| 115dB CMRR at G = +10V/V | Ensures accurate differential measurement in presence of 60Hz EMI and ground-loop noise |
Applications
| Thermocouple Amplifier | 4–20mA Loop Transmitter |
|---|---|
Use Scenario: Amplifying µV-level thermocouple outputs (e.g., Type K, −200°C to +1350°C) in industrial temperature controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing cold-junction compensation-ready differential gain and rail-to-rail output compatible with 16-bit sigma-delta ADCs. Use Value: Input common-mode range extending 200mV below ground allows direct connection to grounded thermocouple junctions; 93µA supply current extends battery life in portable calibrators. |
Use Scenario: Conditioning sensor signals (e.g., pressure, flow) before driving 4–20mA current loops in process automation. IC Role / Device Role / Timing Role: Unity-gain buffer isolating low-level transducer outputs from loop driver ICs while rejecting common-mode noise on long cables. Use Value: 95dB CMRR (min) suppresses induced 50/60Hz noise; shutdown mode reduces loop power during maintenance without disconnecting wiring. |
| Bridge Amplifier | Battery-Powered Portable Equipment |
Use Scenario: Reading unbalanced Wheatstone bridges (e.g., strain gauges, load cells) in structural health monitoring or weighing scales. IC Role / Device Role / Timing Role: Fixed-gain instrumentation amplifier converting mV-level bridge differentials into robust 0–5V output ranges for microcontroller ADCs. Use Value: ±0.01% gain error ensures <0.02% full-scale accuracy without trimming; rail-to-rail output maximizes resolution from 3.3V-supplied 12-bit ADCs. |
Use Scenario: Signal conditioning in handheld medical devices (e.g., pulse oximeters, glucose meters) powered by single-cell lithium batteries. IC Role / Device Role / Timing Role: Low-power analog front-end amplifier for biopotential or optical sensor interfaces requiring stable DC performance over temperature. Use Value: 93µA quiescent current enables >5-year shelf life in standby; −40°C to +85°C rating supports operation in field-deployed diagnostic tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | G = +1 to +1000V/V (adjustable); 1.2mA supply current; no shutdown; 8-lead MSOP package | Higher power consumption limits use in battery-operated devices; wider gain flexibility suits lab-grade equipment | Select AD8221ARMZ only when variable gain and higher bandwidth (825kHz) outweigh power and size constraints |
| LTC6915CMS8 | G = +1, +10, +100V/V (pin-selectable); 125µA supply current; no shutdown; 8-lead MSOP | Same gain options but lacks shutdown; slightly higher supply current reduces battery runtime | Choose LTC6915CMS8 if pin-strapping gain selection is preferred over SHDN control, and 32µA extra current is acceptable |
Compared with AD8221ARMZ and LTC6915CMS8, MAX4195ESA provides the lowest quiescent current (93µA) and integrated shutdown (8µA), making it uniquely suited for ultra-low-power, space-constrained sensor nodes where fixed unity gain is sufficient and board area is premium.
Availability
MAX4195ESA is available at Aetrix Electronics and suitable for thermocouple amplification, 4–20mA loop transmission, and bridge-based transducer interfacing requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX4195ESA 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 MAX4194–MAX4197 family was engineered specifically for micropower, single-supply instrumentation tasks in battery-powered and remote-sensing systems - prioritizing rail-to-rail I/O, sub-100µA operation, and DC precision over raw speed.
FAQ
What is the gain configuration of MAX4195ESA?
The MAX4195ESA is a fixed-gain instrumentation amplifier with G = +1V/V, achieved using on-chip 25kΩ feedback resistors. Unlike the MAX4194, it requires no external gain-setting resistor (RG), simplifying layout and improving gain accuracy stability over temperature and time. This makes MAX4195ESA ideal for unity-gain buffering and differential-to-single-ended conversion where gain adjustment is unnecessary.
Does MAX4195ESA support true single-supply operation with inputs referenced to ground?
Yes, MAX4195ESA supports true single-supply operation with inputs extending 200mV below the negative rail (VEE). When VEE = 0V (ground), the input common-mode range is −0.2V to (VCC − 1.1V), allowing direct connection of grounded-sensor sources like thermocouples or shunt resistors without level-shifting circuitry - a key advantage over conventional op-amps requiring dual supplies.
What is the purpose of the SHDN pin on MAX4195ESA?
The SHDN pin on MAX4195ESA controls a low-power shutdown mode: pulling it low (≤ VCC − 2.5V) reduces supply current to 8µA typical and places the output in high-impedance state. This feature enables rapid power cycling in portable instruments and loop-powered transmitters, preserving system-level energy efficiency without requiring external switches or power sequencing.
Can MAX4195ESA drive standard ADC inputs directly?
Yes, MAX4195ESA can drive most SAR and sigma-delta ADC inputs directly. Its rail-to-rail output swings within 30mV of VCC and VEE into 25kΩ, matching typical ADC input impedance requirements. With REF tied to VCC/2, it delivers a 0–VCC output range centered at mid-supply - eliminating need for external level-shifting or biasing networks in 3.3V or 5V data-acquisition systems.
How does MAX4195ESA compare to MAX4194 in terms of precision and layout sensitivity?
MAX4195ESA offers superior gain accuracy (±0.01% TYP at G = +1V/V) versus MAX4194's externally set gain, which depends on RG tolerance and PCB parasitics. MAX4195ESA eliminates RG routing, minimizing layout-induced errors and thermal EMFs. However, MAX4194 provides adjustable gain (G = +1 to +10,000V/V), while MAX4195ESA is strictly unity-gain - trade-off favors precision and simplicity over flexibility.
MAX4195ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.06V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 220 kHz
- Current - Input Bias:
- 6 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 93µA
- Current - Output / Channel:
- 4.5 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 7.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4195ESA FAQ
1.How can I place an order for MAX4195ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4195ESA 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 MAX4195ESA reliable?
The price and inventory of MAX4195ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4195ESA is usually 5 days.
3.What payment methods are accepted for MAX4195ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4195ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4195ESA?
MAX4195ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4195ESA 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 MAX4195ESA?
For technical support, including MAX4195ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4195ESA requirements.
6.How does Aetrix verify that MAX4195ESA is sourced from the original manufacturer or authorized distributors?
All MAX4195ESA 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 MAX4195ESA meets industry standards.
7.What is the process for return or replacement of MAX4195ESA?
All MAX4195ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4195ESA, 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 MAX4195ESA part is unused and in its original packaging.
Return procedure for MAX4195ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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