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Analog Devices Inc./Maxim Integrated MAX6173AASA+
- Part No.:
- MAX6173AASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6173AASA+.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,530
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Product details
Overview
MAX6173AASA+ from Maxim Integrated is a high-precision, low-noise 2.5V voltage reference with integrated temperature sensor output (TEMP), ±0.06% initial accuracy, 3ppm/°C max temperature coefficient, and operation over -40°C to +125°C for automotive-grade signal conditioning in high-resolution ADC/DAC systems.
For engineers reviewing the MAX6173AASA+ datasheet, MAX6173AASA+ pinout, MAX6173AASA+ application, or MAX6173AASA+ equivalent, this page delivers verified electrical specs, thermal transducer behavior, trim interface design guidance, and AEC-Q100-relevant stability data for precision analog subsystems.
Technical Context
The MAX6173AASA+ uses bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C max TCVOUT and ±0.06% initial accuracy. Its TEMP pin provides a linear 1.9mV/°C output referenced to die temperature, enabling on-chip thermal monitoring without external sensors.
It features a TRIM input supporting ±6% output adjustment via external resistive divider, operates from (VOUT + 2V) to +40V supply, draws only 320μA typical quiescent current, and remains stable with capacitive loads up to 100μF-eliminating mandatory output bypassing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±0.0015 V at +25°C - tight factory calibration enables direct use in 16-bit ADC reference paths without trimming. |
| Tempco (TCVOUT) | 1.5–3 ppm/°C over -40°C to +125°C - ensures ≤0.5 LSB drift in 16-bit systems across full automotive temperature range. |
| Noise (0.1–10 Hz) | 3.8 µVP-P - low flicker noise preserves SNR in precision measurement front-ends and weigh-scale applications. |
| Supply Current | 320 μA typical at +25°C - ultra-low quiescent draw extends battery life in portable instrumentation and remote sensors. |
| Load Drive | Sources 30 mA / sinks 2 mA - sufficient to drive SAR ADC reference inputs and small buffer stages without external amplification. |
| TEMP Output | 570 mV at +25°C, 1.9 mV/°C slope - provides calibrated die temperature sensing for thermal compensation or safety shutdown logic. |
| Line Regulation | 0.6–10 ppm/V over 4.5–40 V input - minimal sensitivity to supply rail variation improves accuracy in unregulated or noisy power domains. |
Pinout & Package
MAX6173AASA+ is housed in an 8-pin SO (Small Outline) package (package code S8+4, outline 21-0041), RoHS-compliant, with standard JEDEC footprint and thermal characteristics (θJA = 132°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 4.5V to 40V; requires local 0.1µF ceramic decoupling for optimal line-transient rejection. |
| OUT (Pin 6) | Reference voltage output | 2.5V ±0.06% output; stable with 0–100µF capacitive load; no mandatory bypass capacitor needed. |
| GND (Pin 4) | Analog ground reference | Common return for IN, OUT, TRIM, and TEMP; must be low-impedance connection to minimize noise coupling. |
| TRIM (Pin 5) | Voltage-adjust input | Accepts 0–2.5V divider tap; enables ±6% fine-tuning of output using external potentiometer or resistor network. |
| TEMP (Pin 3) | Digital temperature transducer | Outputs 570 mV at +25°C with 1.9 mV/°C slope; unbuffered-requires high-Z ADC input or op-amp follower for accurate reading. |
| Pins 1 & 8 | Internally connected | No external connection permitted; internal bonding only-must remain floating or tied to GND per layout guidelines. |
| Pin 7 | No connection | Not internally bonded; leave unconnected; avoid routing traces or vias to this pad. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | Linear 1.9 mV/°C TEMP output enables real-time die temperature monitoring without external components or calibration. |
| Trimmable reference | ±6% output adjustment via TRIM pin supports system-level calibration to compensate for PCB trace resistance or ADC offset errors. |
| No-output-capacitor stability | Stable with 0–100µF output capacitance eliminates mandatory bypass cap, reducing BOM count and saving PCB area in space-constrained modules. |
| AEC-Q100 qualified | Qualified for automotive applications (-40°C to +125°C) with validated long-term stability (50 ppm/1000 hrs) and thermal hysteresis (120 ppm). |
| Short-circuit protection | 60 mA sink limit when OUT shorted to GND; 3 mA limit when shorted to IN-prevents latch-up and enables robust field deployment. |
Applications
| High-Resolution Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: 16-bit SAR ADC in industrial process controller measuring thermocouple or strain-gauge signals. IC Role / Device Role / Timing Role: Primary voltage reference and on-die temperature monitor for self-calibrating gain/offset correction. Use Value: 3ppm/°C tempco and 3.8µVP-P noise ensure <1 LSB error across -40°C to +85°C operating range without recalibration. | Use Scenario: Battery management system (BMS) cell voltage monitoring in EV traction packs. IC Role / Device Role / Timing Role: Precision reference for isolated ADCs measuring individual Li-ion cell voltages; TEMP pin monitors IC junction temperature during fast charging. Use Value: AEC-Q100 qualification, -40°C to +125°C operation, and 0.06% initial accuracy meet ASIL-B functional safety requirements for voltage accuracy. |
| Portable Test Equipment | Digital Multimeter Reference Subsystem |
Use Scenario: Handheld DMM with autoranging and 5½-digit resolution requiring stable reference under varying battery voltage. IC Role / Device Role / Timing Role: Main reference source with TRIM-adjustable output to maintain accuracy as battery depletes from 4.2V to 3.0V. Use Value: Wide 4.5–40V input range and 0.6 ppm/V line regulation enable direct connection to unregulated Li-ion battery rails without LDO pre-regulation. | Use Scenario: Benchtop digital multimeter performing DCV measurements with 0.002% basic accuracy specification. IC Role / Device Role / Timing Role: Ultra-stable 2.5V reference feeding dual-slope integrator and auto-zero amplifier stages. Use Value: 50 ppm long-term stability (1000 hrs) and 120 ppm thermal hysteresis support annual calibration intervals without drift-induced rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5V, ±0.02% initial accuracy, 2ppm/°C max tempco, 3.5µVP-P noise; requires 1µF output capacitor for stability. | Higher accuracy and lower noise but lacks integrated temperature sensor and trim capability. | Select ADR4525BRZ when ultimate reference stability is required and TEMP/trim functions are implemented externally. |
| REF5025IDR | 2.5V, ±0.05% initial accuracy, 3ppm/°C max tempco, 4.5µVP-P noise; no TEMP output; TRIM not supported. | Lower cost, smaller 8-pin SOIC package, but no on-chip temperature sensing or output adjustment. | Select REF5025IDR for cost-sensitive industrial applications where die temperature monitoring is unnecessary. |
Compared with ADR4525BRZ and REF5025IDR, MAX6173AASA+ uniquely integrates temperature sensing and output trimming in a single 8-pin SO package while maintaining competitive 3ppm/°C tempco and 3.8µVP-P noise-reducing component count and board area in compact, multifunctional analog designs.
Availability
MAX6173AASA+ is available at Aetrix Electronics and suitable for high-resolution data acquisition, automotive sensor signal conditioning, and portable test equipment requiring stable component supply with guaranteed long-term availability and automotive-grade reliability.
Supply support for MAX6173AASA+ 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 demanding industrial, automotive, and communications applications.
The MAX6173–MAX6177 family was engineered specifically for high-accuracy, low-drift voltage referencing in automotive and industrial systems requiring integrated temperature monitoring and field-adjustable output-addressing needs beyond standard bandgap references.
FAQ
What is the maximum operating temperature range for the MAX6173AASA+?
The MAX6173AASA+ is rated for continuous operation from -40°C to +125°C, meeting AEC-Q100 Grade 1 requirements. This extended range supports deployment in engine control units, under-hood sensors, and industrial PLCs exposed to harsh thermal environments. The device maintains its 3ppm/°C tempco and ±0.06% initial accuracy across this full span, as verified by production testing and characterization data.
Does the MAX6173AASA+ require an output bypass capacitor for stability?
No, the MAX6173AASA+ does not require an output bypass capacitor for stability. It is designed to remain stable with capacitive loads ranging from 0 to 100µF. This eliminates the need for a mandatory output capacitor, reducing bill-of-materials count and PCB area-especially valuable in space-constrained applications like handheld instruments and automotive ECUs. Input decoupling with a 0.1µF ceramic capacitor is still recommended.
How is the TEMP output of the MAX6173AASA+ used in practice?
The TEMP output of the MAX6173AASA+ provides a voltage proportional to die temperature (570 mV at +25°C, 1.9 mV/°C slope). In practice, it is read by a high-impedance ADC input to monitor IC junction temperature for thermal compensation or overtemperature shutdown. Because it reflects die temperature-not ambient-it enables accurate real-time correction of reference drift and detection of abnormal self-heating conditions in high-power-density layouts.
Can the output voltage of the MAX6173AASA+ be adjusted, and if so, how?
Yes, the output voltage of the MAX6173AASA+ can be adjusted ±6% using the TRIM pin. Connect a resistive divider between OUT and GND, with the wiper or midpoint connected to TRIM. For example, a 50kΩ potentiometer (e.g., MAX5436) configured as a variable divider allows precise tuning. The output change follows ∆VOUT = 2 × (VTRIM − VOUT/2) × k, where k ≈ ±6%. This enables system-level calibration to correct for PCB trace resistance or ADC gain errors.
What is the short-circuit protection behavior of the MAX6173AASA+?
The MAX6173AASA+ features internal short-circuit protection: when OUT is shorted to GND, output current is limited to 60 mA; when shorted to IN, current is limited to 3 mA. This prevents damage during assembly, test, or field faults. Recovery is automatic upon fault removal. The protection circuitry does not affect normal operation-output remains fully specified for sourcing up to 30 mA and sinking up to 2 mA under steady-state conditions.
MAX6173AASA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.8µVp-p
- Noise - 10Hz to 10kHz:
- 6.8µVrms
- Voltage - Input:
- 4.5V ~ 40V
- Current - Supply:
- 600µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6173AASA+ FAQ
1.How can I place an order for MAX6173AASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6173AASA+ 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 MAX6173AASA+ reliable?
The price and inventory of MAX6173AASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6173AASA+ is usually 5 days.
3.What payment methods are accepted for MAX6173AASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6173AASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6173AASA+?
MAX6173AASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6173AASA+ 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 MAX6173AASA+?
For technical support, including MAX6173AASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6173AASA+ requirements.
6.How does Aetrix verify that MAX6173AASA+ is sourced from the original manufacturer or authorized distributors?
All MAX6173AASA+ 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 MAX6173AASA+ meets industry standards.
7.What is the process for return or replacement of MAX6173AASA+?
All MAX6173AASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6173AASA+, 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 MAX6173AASA+ part is unused and in its original packaging.
Return procedure for MAX6173AASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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