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Analog Devices Inc./Maxim Integrated MAX923C/D
- Part No.:
- MAX923C/D
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- Die
- Datasheet:
-
MAX923C/D.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF DIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,450
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Product details
Overview
The MAX923C/D from Maxim Integrated is a dual micropower comparator with integrated 1.182V ±1% bandgap reference, programmable hysteresis via HYST pin, and TTL/CMOS-compatible outputs that source up to 40mA and sink ≥5mA. It operates from a single +2.5V to +11V supply (or ±1.25V to ±5.5V dual supply), supports rail-to-rail input common-mode range down to V−, and targets low-power threshold detection in battery-powered systems.
For engineers reviewing the MAX923C/D datasheet, MAX923C/D pinout, MAX923C/D application, or MAX923C/D equivalent, key selection considerations include its 4µA max quiescent current over 0°C to +70°C, 12µs propagation delay at 10mV overdrive, internal reference accuracy, and dual-comparator architecture enabling window detector implementations without external references.
Technical Context
The MAX923C/D integrates two independent comparators sharing a single internal 1.182V reference and a dedicated HYST pin for simultaneous hysteresis programming across both channels. Its output stage eliminates crowbar current during transitions, preventing supply-line glitches and parasitic feedback-critical for stable operation in poorly decoupled or high-impedance layouts.
Input common-mode range extends from V− to (V+ − 1.3V); outputs swing from V+ to V− (no GND pin), supporting true dual-supply operation. The HYST pin accepts voltages from (REF − 50mV) to REF, enabling up to 100mV total hysteresis band with two external resistors-confirmed for both comparators in the MAX923 family per Figure 1b and Applications Information.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply - enables direct interface with 3V/5V logic and bipolar sensor signals. |
| Quiescent Current | ≤4µA over 0°C to +70°C - ensures multi-year battery life in always-on monitoring circuits. |
| Reference Voltage | 1.182V ±1% (0°C to +70°C) referenced to V− - provides stable, temperature-compensated threshold without external components. |
| Propagation Delay | 12µs at 10mV overdrive - balances speed and ultra-low power for precision thresholding, not high-speed signal discrimination. |
| Output Drive | Sources ≥40mA continuously, sinks ≥5mA - directly drives LEDs, small relays, or logic inputs without buffer stages. |
| Hysteresis Control | Single HYST pin adjusts identical hysteresis on both comparators - simplifies window detector design with matched noise margin. |
| Input Offset Voltage | ±10mV max (0°C to +70°C) - defines minimum detectable differential voltage without trimming. |
Pinout & Package
MAX923C/D is supplied as die (unpackaged wafer-level device) rated for 0°C to +70°C operation. It uses the standard 8-pin µMAX/SO/DIP pinout configuration, with no package-specific mechanical data provided for the die variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output: actively sources/sinks current; swings rail-to-rail between V+ and V−. |
| 2 | V+ | Positive supply input: accepts +2.5V to +11V (single) or connects to positive rail in dual-supply mode. |
| 3 | REF | 1.182V reference output (vs. V−): supplies precise threshold for both comparators; not bypassed. |
| 4 | HYST | Hysteresis control input: sets identical hysteresis band on both comparators via resistor divider to REF and V−. |
| 5 | INB− | Inverting input of comparator B: accepts signals from V− to (V+ − 1.3V); ≤1nA leakage ensures high-impedance sensing. |
| 6 | INA+ | Noninverting input of comparator A: same voltage range and leakage as INB−; used with INB− for window detection. |
| 7 | V− | Negative supply input: connects to GND in single-supply mode; defines reference point for REF and input common-mode range. |
| 8 | OUTA | Comparator A output: identical drive capability and swing range as OUTB; enables independent or complementary logic outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 4µA max over full commercial temperature range - enables decade-scale operation on coin-cell batteries. |
| Dual comparator + reference integration | Single die contains two matched comparators and one precision 1.182V reference - reduces BOM count and layout area vs. discrete solutions. |
| Shared HYST pin | One external resistor network programs identical hysteresis on both comparators - ensures consistent noise immunity in window detectors. |
| Rail-to-rail input range | Operates with inputs from V− to (V+ − 1.3V) - supports direct sensing of ground-referenced or negative-going signals without level shifting. |
| Crowbar-free output stage | No shoot-through current during switching - eliminates supply transients that cause instability in sensitive analog sections. |
Applications
| Window Detector | Battery Voltage Monitor |
|---|---|
Use Scenario: Monitoring a 5V system supply to assert "power good" only when voltage stays within 4.5V–5.5V window. IC Role / Device Role / Timing Role: Dual comparator compares VIN against upper/lower thresholds derived from internal REF and resistor dividers; HYST pin applies matched hysteresis to both channels. Use Value: Eliminates external reference and trim components; 4µA supply current extends host system standby time significantly. |
Use Scenario: Detecting end-of-life in a 3.6V Li-ion battery by triggering shutdown below 3.0V and wake-up above 3.3V. IC Role / Device Role / Timing Role: One comparator monitors falling voltage (undervoltage lockout), the other rising voltage (recovery); shared REF ensures thermal tracking. Use Value: Internal 1.182V reference enables accurate ratio-based thresholds with only three resistors; no calibration required. |
| Oscillator Circuit | Threshold Detector |
Use Scenario: Building a relaxation oscillator using comparator hysteresis and RC timing network for low-frequency clock generation. IC Role / Device Role / Timing Role: Comparator A forms hysteresis comparator; capacitor charges/discharges between thresholds set by REF and HYST network. Use Value: Programmable HYST pin allows precise, temperature-stable frequency tuning without op-amp feedback loops. |
Use Scenario: Converting analog sensor output (e.g., thermistor voltage) into clean digital alert when crossing critical temperature threshold. IC Role / Device Role / Timing Role: Single comparator channel compares sensor voltage to REF-derived threshold; HYST pin adds noise immunity. Use Value: 12µs propagation delay and 4µA current suit slow-moving industrial sensors; output drives indicator LED directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX923CSA | Same die, assembled in 8-pin SO package; specified for 0°C to +70°C; includes full AC/DC characterization at temperature extremes. | Requires PCB footprint for SO-8; suitable for prototyping and volume production where packaging and test coverage are mandatory. | Select MAX923CSA when board assembly, traceability, or extended temperature validation is required; MAX923C/D is for custom hybrid or chip-on-board integration. |
| TLV3702IDR | Low-power dual comparator (800nA IQ) with no internal reference; requires external reference or resistor divider; 360µs propagation delay. | Higher accuracy possible with precision external reference, but adds cost/area; slower response limits use in dynamic thresholding. | Choose TLV3702IDR only if sub-1µA supply current is mandatory and hysteresis can be implemented externally; MAX923C/D offers integrated reference and faster response. |
Compared with MAX923CSA, the MAX923C/D provides identical electrical performance in die form but lacks packaged reliability testing and thermal characterization; compared with TLV3702IDR, it delivers faster response, built-in reference, and simpler hysteresis-justifying its higher quiescent current in most battery-critical designs.
Availability
MAX923C/D is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with ultra-low power consumption and integrated reference functionality.
Supply support for MAX923C/D 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 power management, sensing, and signal conditioning in industrial, medical, and portable applications.
The MAX921–MAX924 family was engineered specifically for micropower threshold detection in space- and energy-constrained systems, combining reference, comparator, and hysteresis control in minimal die area.
FAQ
What is the operating temperature range for the MAX923C/D?
The MAX923C/D is characterized for 0°C to +70°C operation. Unlike packaged variants (e.g., MAX923CSA), the die form does not undergo extended temperature testing; users must validate performance across their target ambient range in final application conditions. The MAX923C/D datasheet specifies all DC parameters at +25°C only, per ordering information footnote *.
Does the MAX923C/D include an internal voltage reference?
Yes, the MAX923C/D integrates a 1.182V ±1% bandgap voltage reference referenced to V−. This reference is shared by both comparators and feeds the HYST pin circuitry. It is designed to source up to 15µA and sink up to 8µA, and must not be bypassed per the datasheet's Layout and Bypassing section.
How is hysteresis implemented on the MAX923C/D?
Hysteresis on the MAX923C/D is programmed using the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. This network sets identical hysteresis on both comparators, with maximum hysteresis band of 100mV (when HYST = REF − 50mV). No external feedback paths or additional op-amps are needed.
What are the absolute maximum ratings for MAX923C/D supply voltage?
The MAX923C/D supports V+ to V− up to +12V. For single-supply operation, V− is tied to GND, so V+ may range from +2.5V to +11V. In dual-supply mode, V+ and V− may each swing from ±1.25V to ±5.5V - e.g., V+ = +5V and V− = −5V yields 10V total supply, within absolute rating limits.
Can the MAX923C/D outputs drive LEDs directly?
Yes, the MAX923C/D outputs can source up to 40mA continuously, making them suitable for direct LED driving. For example, with a 5V supply and red LED (VF ≈ 1.8V), a 100Ω series resistor limits current to ~32mA - well within spec. Ensure total power dissipation (V×I per output) remains below package limits; die form thermal management is user-defined.
MAX923C/D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- Die
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 4.5µA
- Current - Quiescent (Max):
- 40dB CMRR, 40dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- Die
MAX923C/D FAQ
1.How can I place an order for MAX923C/D through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923C/D 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 MAX923C/D reliable?
The price and inventory of MAX923C/D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923C/D is usually 5 days.
3.What payment methods are accepted for MAX923C/D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923C/D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923C/D?
MAX923C/D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923C/D 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 MAX923C/D?
For technical support, including MAX923C/D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923C/D requirements.
6.How does Aetrix verify that MAX923C/D is sourced from the original manufacturer or authorized distributors?
All MAX923C/D 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 MAX923C/D meets industry standards.
7.What is the process for return or replacement of MAX923C/D?
All MAX923C/D units undergo pre-shipment inspection (PSI). If there is an issue with MAX923C/D, 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 MAX923C/D part is unused and in its original packaging.
Return procedure for MAX923C/D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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