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Analog Devices Inc./Maxim Integrated MAX985ESA+TG002
- Part No.:
- MAX985ESA+TG002
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX985ESA+TG002.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:3,653
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Product details
Overview
MAX985ESA+TG002 from Maxim Integrated is a single-channel, micropower, rail-to-rail input/output comparator with push-pull output stage, operating from 2.5V to 5.5V single supply or ±1.25V to ±2.75V dual supply. It delivers 300ns propagation delay, 11µA quiescent current, and 0.5mV typical input offset voltage. It is used in battery-powered zero-crossing detectors and threshold discriminators requiring low supply current and rail-swing output drive up to 8mA.
For engineers reviewing the MAX985ESA+TG002 datasheet, MAX985ESA+TG002 pinout, MAX985ESA+TG002 application, or MAX985ESA+TG002 equivalent, key selection criteria include its push-pull output architecture (vs. open-drain alternatives), UCSP/SC70/SO package options, guaranteed -40°C to +85°C operation, and absence of phase reversal under overdriven inputs.
Technical Context
The MAX985ESA+TG002 implements a precision input stage with 1.0pA typical input bias current and common-mode range extending 250mV beyond both rails, enabling robust sensing near supply boundaries. Its internal hysteresis (±3mV) ensures clean switching with slow-moving signals without external components.
The push-pull output stage provides symmetrical sourcing and sinking capability-delivering 4.85V VOH at 8mA load with VCC = 5V and 0.2V VOL at same conditions-eliminating need for external pull-up resistors and minimizing supply-current surges during transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V single supply; enables direct use in 3V and 5V systems without level-shifting |
| Quiescent Supply Current | 11µA typical; supports multi-year battery life in portable sensors and wearables |
| Propagation Delay | 300ns at 100mV overdrive, CL = 15pF; suitable for medium-speed signal conditioning and timing-critical detection |
| Input Offset Voltage | 0.5mV typical; ensures accurate threshold detection down to sub-millivolt levels |
| Rail-to-Rail I/O | Inputs extend 250mV beyond rails; outputs swing within 0.2V of rails at 8mA-enables full dynamic range utilization |
| Output Type | Push-pull (not open-drain); drives loads directly without external pull-up, reducing BOM count and board space |
| Operating Temperature | -40°C to +85°C; qualified for industrial and automotive cabin-ambient environments |
Pinout & Package
The MAX985ESA+TG002 is packaged in an 8-pin SO (Small Outline) package with exposed pad, RoHS-compliant and lead-free. Pin 1 is OUT, Pin 2 is IN−, Pin 3 is IN+, Pin 4 is VEE (GND in single-supply), Pin 5 is N.C., Pin 6 is VCC, Pin 7 is N.C., Pin 8 is N.C. Bump/pin mapping confirms no internal connection on pins 5, 7, and 8 per UCSP/SO cross-reference table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Comparator output | Push-pull stage drives high/low actively; sinks/sources up to 8mA; no external pull-up required |
| IN− (Pin 2) | Inverting input | Accepts signals from −0.25V to VCC + 0.25V; immune to phase reversal when overdriven |
| IN+ (Pin 3) | Noninverting input | Same rail-to-rail common-mode range as IN−; enables flexible reference or signal routing |
| VEE (Pin 4) | Negative supply / GND | Connected to ground in single-supply mode; defines lower output rail and input common-mode baseline |
| N.C. (Pins 5, 7, 8) | No connection | Not internally bonded; must be left floating or tied to GND per layout best practice-no functional impact |
| VCC (Pin 6) | Positive supply | Supplies core logic and output drivers; accepts 2.5V–5.5V; PSRR = 55dB minimizes noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 250mV beyond both supply rails-supports direct sensing of signals near VCC or GND without attenuation |
| Push-pull output architecture | Eliminates need for external pull-up resistors and associated power loss, simplifying level translation circuits |
| Ultra-low 11µA supply current | Enables continuous monitoring in energy-constrained IoT nodes and medical patch sensors |
| Internal 3mV hysteresis | Prevents chatter on noisy or slowly varying inputs-no external feedback components required for basic stability |
| No phase reversal under overdrive | Guarantees predictable output polarity even when inputs exceed supply rails-critical for fault-tolerant protection circuits |
Applications
| Zero-Crossing Detector | Threshold Discriminator |
|---|---|
Use Scenario: Detecting AC waveform polarity transitions in audio line receivers or motor commutation feedback. IC Role / Device Role / Timing Role: Comparator compares analog input against grounded reference; output toggles precisely at 0V crossing. Use Value: 300ns propagation delay and rail-to-rail input enable accurate timing capture of fast zero crossings without signal clipping. | Use Scenario: Triggering system wake-up or alarm when sensor voltage exceeds preset safety limit (e.g., battery overvoltage). IC Role / Device Role / Timing Role: Compares sensed voltage against stable reference; asserts digital flag upon breach. Use Value: 0.5mV input offset and 3mV hysteresis ensure repeatable, jitter-free trip points across temperature and supply variation. |
| Ground-Sensing Monitor | Portable Power Sequencer |
Use Scenario: Verifying integrity of ground return paths in automotive body control modules or industrial PLC I/O cards. IC Role / Device Role / Timing Role: Measures voltage drop across sense resistor between chassis and logic ground; flags excessive resistance. Use Value: Input common-mode range extends 250mV below GND-allows detection of negative offsets indicative of ground lift or corrosion. | Use Scenario: Controlling power-up sequence of multiple voltage rails in handheld test equipment or portable instrumentation. IC Role / Device Role / Timing Role: Monitors each rail's voltage and enables next stage only after stable threshold is reached. Use Value: 11µA quiescent current and 2.5V minimum supply allow monitoring of 3.3V/5V rails while consuming negligible standby power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX985EXK+T | Same electrical specs; SC70-5 package (smaller footprint, no exposed pad) | Better suited for ultra-dense PCB layouts where thermal mass is less critical | Select when board space is constrained and thermal dissipation requirements are moderate |
| TLV3701CDR | Higher 17µA supply current; 1.8V–5.5V supply; rail-to-rail output only (not input) | Limited common-mode range restricts use in ground-sensing or high-side sensing topologies | Choose only if lower supply voltage (<2.5V) is mandatory and input rail-to-rail capability is not required |
Compared with MAX985EXK+T, the MAX985ESA+TG002 offers superior thermal performance via SO package exposed pad but occupies more area; versus TLV3701CDR, it delivers tighter offset, lower current, and true rail-to-rail input-making it irreplaceable in precision low-power sensing.
Availability
MAX985ESA+TG002 is available at Aetrix Electronics and suitable for portable/battery-powered systems, zero-crossing detectors, and threshold discriminators requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX985ESA+TG002 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 and mixed-signal ICs for industrial, medical, communications, and consumer applications-with emphasis on low-power, high-reliability solutions.
The MAX985 series belongs to Maxim's micropower comparator product line, engineered specifically for energy-sensitive applications demanding rail-to-rail operation, minimal supply current, and guaranteed performance across extended temperature ranges.
FAQ
What is the maximum capacitive load the MAX985ESA+TG002 can drive while maintaining 300ns propagation delay?
The MAX985ESA+TG002 maintains ≤300ns propagation delay with CL = 15pF at VCC = 5V and 100mV overdrive. At CL = 50pF, tPD increases to ~430ns; at CL = 200pF, it reaches ~530ns. For timing-critical designs, keep load capacitance ≤15pF or add buffer stage if higher capacitance is unavoidable. The MAX985ESA+TG002 datasheet Figure 5b confirms this CL vs. tPD relationship.
Does the MAX985ESA+TG002 require external hysteresis for reliable operation with noisy inputs?
No-the MAX985ESA+TG002 integrates ±3mV internal hysteresis, sufficient for most medium-noise applications like zero-crossing detection or threshold monitoring. External hysteresis is only needed when >3mV hysteresis band is required; the datasheet provides resistor calculation methods for such cases. The MAX985ESA+TG002's built-in hysteresis eliminates BOM cost and layout complexity in standard use cases.
Can the MAX985ESA+TG002 operate from a 2.7V single supply while driving an 8mA load?
Yes-the MAX985ESA+TG002 guarantees rail-to-rail output swing down to 0.4V VOL at ISINK = 3.5mA and VCC = 2.7V (per Electrical Characteristics table). At 8mA sink, VOL rises to ~0.55V, still compatible with 2.7V logic families requiring <0.8V low-level threshold. The MAX985ESA+TG002's push-pull output sustains this performance without external components.
Is the MAX985ESA+TG002 pin-compatible with other comparators in the MAX985/MAX986 family?
No-MAX985ESA+TG002 (8-pin SO) is not pin-compatible with MAX985EXK+T (5-pin SC70) or MAX985EUK+T (5-pin SOT23). Even within SO packages, MAX985ESA+ differs from MAX986ESA+ in output structure (push-pull vs. open-drain) and pin 1 function. Always verify pin mapping using the "Pin/Bump Description" table-substituting without layout review risks functional failure. The MAX985ESA+TG002 requires dedicated footprint validation.
What is the absolute maximum voltage allowed on the MAX985ESA+TG002 output pin when VCC = 0V?
Per Absolute Maximum Ratings, the MAX985ESA+TG002 output (OUT) may tolerate −0.3V to (VCC + 0.3V). With VCC = 0V, the safe output voltage range is −0.3V to +0.3V. Exceeding this risks latch-up or permanent damage. This limitation applies regardless of whether the device is powered-never apply external voltage to OUT while VCC is unpowered. The MAX985ESA+TG002 datasheet Section "Absolute Maximum Ratings" explicitly defines this constraint.
MAX985ESA+TG002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
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- -
MAX985ESA+TG002 FAQ
1.How can I place an order for MAX985ESA+TG002 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX985ESA+TG002 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 MAX985ESA+TG002 reliable?
The price and inventory of MAX985ESA+TG002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX985ESA+TG002 is usually 5 days.
3.What payment methods are accepted for MAX985ESA+TG002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX985ESA+TG002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX985ESA+TG002?
MAX985ESA+TG002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX985ESA+TG002 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 MAX985ESA+TG002?
For technical support, including MAX985ESA+TG002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX985ESA+TG002 requirements.
6.How does Aetrix verify that MAX985ESA+TG002 is sourced from the original manufacturer or authorized distributors?
All MAX985ESA+TG002 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 MAX985ESA+TG002 meets industry standards.
7.What is the process for return or replacement of MAX985ESA+TG002?
All MAX985ESA+TG002 units undergo pre-shipment inspection (PSI). If there is an issue with MAX985ESA+TG002, 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 MAX985ESA+TG002 part is unused and in its original packaging.
Return procedure for MAX985ESA+TG002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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