MAX1363MEUB+ - 12-Bit 4-Ch 133ksps ADC | Analog Devices
MPN: MAX1363MEUB+ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.48 | $7.48 |
| 10 | $6.73 | $67.30 |
| 100 | $5.99 | $599.00 |
| 500 | $5.36 | $2,680.00 |
| 1,000 | $4.79 | $4,790.00 |
| 2,500 | $4.34 | $10,850.00 |
MAX1363MEUB+ Overview
An ADC (analog-to-digital converter) is a data-acquisition mixed-signal IC that converts real-world analog voltages into discrete digital codes for processing by a microcontroller, DSP, or ASIC. SAR ADCs sample and digitize one input at a time using a successive-approximation register and a precision DAC loop, making them ideal for multiplexed multi-channel systems where low power and deterministic latency matter. The MAX1363 sits in the broader product hierarchy: ADC -> data converter -> data-acquisition IC -> mixed-signal IC -> semiconductor. By integrating a digital window comparator and the SMBus Alert response protocol, the MAX1363 functions as a 4-channel system monitor that can autonomously assert an interrupt when any input falls outside a user-programmed window.
Key specifications include a maximum sampling rate of 133 ksps, 2.7 V to 3.6 V single-supply analog/digital operation, an internal 2.048 V reference (the MAX1364 variant uses 4.096 V), and supply current of 660 uA in internal-reference mode or 436 uA in external-reference mode at 133 ksps. The window comparator outputs interrupt via the SMBus Alert line, eliminating host polling and reducing firmware overhead. A 2-wire SMBus-compatible serial interface operates up to 400 kHz. Shutdown current drops to 0.5 uA with the reference disabled, making the part well suited to battery-powered multi-rail monitoring.
The SAR architecture with internal auto-calibration yields excellent DC accuracy and high power-supply rejection (PSRR of plus or minus 0.01 LSB/V), enabling the part to ride on noisy system rails. The four analog inputs can be configured as 2 differential or 4 single-ended channels selected via the serial interface, and a dedicated analog-input current-limit protects against sensor faults and ESD transients.
Typical applications include 4-rail system-voltage monitoring in servers and networking switches, battery-cell voltage monitoring in battery-management boards, environmental and HVAC sensor interface boards, and SMBus-based interrupt-generating monitoring of temperature and supply voltages in telecom and industrial equipment. The MAX1363's combination of low power, integrated comparator, and SMBus Alert makes it a workhorse for compute platforms that must supervise multiple rails without devoting firmware cycles to constant polling.
When designing with the MAX1363, ensure the analog input signals remain within the supply rails and place 0.1 uF decoupling capacitors close to the supply pin. The internal 2.048 V reference allows direct scaling for 4-rail monitoring applications; for designs needing 5 V inputs use the external-reference mode (the MAX1364 variant uses 4.096 V reference for 5 V systems).
This page consolidates distributor pricing tiers, drop-in alternative MPNs in the same uMAX-10 footprint, and practical design notes not always present in the manufacturer datasheet, helping procurement and design engineers compare, qualify, and source the MAX1363MEUB+ quickly.
Drop-in alternatives for MAX1363MEUB+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX1363MEUB+ (same form factor and footprint) — differing in Package, Resolution, Architecture, Sampling Rate, Input Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1364MEUB+
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →MAX1363EUB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1363MEUB+T
✅ Drop-In✓ In Stock
$3.62 / Unit
View Datasheet →MAX1361EUB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1362EUB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1363MEUB+ Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Number of Input Channels | 4 (2 differential or 4 single-ended) |
| ADC Architecture | SAR (Successive Approximation) |
| Sampling Rate (max) | 133 ksps |
| Supply Voltage Range | 2.7 V to 3.6 V |
| Internal Reference Voltage | 2.048 V (MAX1363) |
| Supply Current at 133 ksps | 660 uA (internal ref) / 436 uA (external ref) |
| Shutdown Current | 0.5 uA (reference off) |
| Power-Supply Rejection Ratio | ±0.01 LSB/V |
| Serial Interface | SMBus/I2C-compatible, up to 400 kHz |
| Window Comparator | Yes, programmable trip window |
| Alert Response | SMBus Alert (interrupt) output |
| Operating Temperature Range | -40 °C to +85 °C (extended) |
| Package | 10-pin uMAX / 10-TFSOP / 10-MSOP (3.00 mm width) |
| Mounting Type | Surface Mount |
| Number of Terminals | 10 |
| Terminal Form | Gull Wing |
| Temperature Grade | Industrial |
MAX1363MEUB+ Pin Configuration
| Pin 1 | AIN1 — Analog input channel 1 (single-ended) / AIN1+ (differential) |
| Pin 2 | AIN2 — Analog input channel 2 (single-ended) / AIN1- (differential) |
| Pin 3 | AIN3 — Analog input channel 3 (single-ended) / AIN2+ (differential) |
| Pin 4 | AIN4 — Analog input channel 4 (single-ended) / AIN2- (differential) |
| Pin 5 | AGND — Analog ground |
| Pin 6 | REF — Reference voltage bypass / external reference input |
| Pin 7 | AVDD — Analog supply voltage (2.7 V to 3.6 V) |
| Pin 8 | SDA — SMBus / I2C serial data |
| Pin 9 | SCL — SMBus / I2C serial clock |
| Pin 10 | ALERT — SMBus Alert output (open-drain, active low) |
Typical Applications
MAX1363MEUB+ is suitable for 6 applications: 4-Rail System Voltage Monitoring, Battery Cell Voltage Monitoring (BMS), Industrial Sensor Interface Board, Telecom Equipment Power Supervision, HVAC and Environmental Sensor Hub, White Goods and Appliance Control Boards.
4-Rail System Voltage Monitoring
The MAX1363MEUB+ is an ideal 4-rail voltage monitor for servers, networking switches, and baseboard management controllers. Each of its four inputs can connect to a separate supply rail, with the integrated 2.048 V reference scaling naturally for 3.3 V rails (a resistive divider can map higher rails). The on-chip programmable window comparator continuously checks each conversion result against user-defined thresholds and asserts SMBus Alert on any out-of-window condition, allowing the host BMC to react to faults such as brown-outs or over-voltage events without continuous polling. The 133 ksps throughput is more than sufficient for periodic multi-rail supervision, while 660 uA supply current keeps power overhead low even with all four channels active.
Recommended
Battery Cell Voltage Monitoring (BMS)
In multi-cell battery management systems the MAX1363MEUB+ can supervise four adjacent cell voltages through external resistor dividers, with the integrated window comparator flagging any cell drifting outside its safe operating range. The 0.5 uA shutdown current lets the part remain in standby during shipping/storage, waking on demand to scan cell voltages. Because the ADC draws only 660 uA at 133 ksps with the internal reference, the part adds negligible parasitic drain to the battery pack. The SMBus Alert response interface integrates cleanly with SMBus-capable battery gas gauges and chargers, simplifying the host firmware and reducing PCB area by eliminating an external comparator.
Recommended
Industrial Sensor Interface Board
An industrial sensor interface board using the MAX1363MEUB+ can digitize up to four analog sensor outputs (such as temperature, pressure, flow, and humidity transducers) and report them over SMBus to a host PLC or MCU. Each conversion takes about 7.5 us at 133 ksps, so all four channels can be scanned in under 30 us with deterministic latency. The 12-bit resolution (4096 codes over a 2.048 V full-scale input) gives about 0.5 mV LSB, more than adequate for typical industrial transducer spans. The integrated alert simplifies safety logic by allowing the part to autonomously signal sensor out-of-range conditions without host-side polling, an important feature for IEC 61131-3 PLC designs.
Recommended
Telecom Equipment Power Supervision
In telecom line cards and shelf-management cards the MAX1363MEUB+ supervises -48 V, +5 V, +3.3 V, and +1.8 V rails after external resistor scaling, providing a single-chip solution for multi-rail health monitoring. Its SMBus Alert output can directly drive the shelf's interrupt tree, alerting the central office alarm aggregator when any supervised rail drifts out of tolerance. The part's industrial -40 °C to +85 °C temperature range meets the NEBS Level 3 thermal envelope required by typical telecom hardware. Because the converter is specified for 2.7 V to 3.6 V operation, it pairs naturally with a low-voltage system rail derived from the -48 V input via an intermediate-bus converter.
Recommended
HVAC and Environmental Sensor Hub
In an HVAC controller or environmental sensor hub, the MAX1363MEUB+ can digitize outputs from four analog environmental sensors (such as NTC thermistor networks, CO2 NDIR sensors, and humidity probes) into 12-bit values accessible via SMBus to the building-management host MCU. The four single-ended or two differential input configurations let designers reuse the same board across both single-ended sensor and Wheatstone-bridge-style differential transducers. The low 660 uA supply current keeps power budgets low for wall-powered thermostats, and the 0.5 uA shutdown current enables battery-backed sensors to wake periodically, scan, and return to sleep.
Recommended
White Goods and Appliance Control Boards
White goods such as washing machines, dishwashers, and refrigerators often require monitoring multiple analog signals such as motor current (via shunt), water-level sensor, NTC temperature, and door-switch status. The MAX1363MEUB+ provides four 12-bit ADC channels plus a programmable threshold comparator in a 10-pin uMAX package small enough to fit inside a compact appliance PCB. Its SMBus interface integrates with the appliance's main microcontroller, while the SMBus Alert feature lets the part autonomously raise interrupts for out-of-range conditions such as overtemperature or overcurrent - critical for functional safety in IEC 60335-compliant designs.
Recommended
Recommended Products Summary
Engineering reference data for MAX1363MEUB+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1364MEUB+ | MAX1363EUB+ | MAX1363MEUB+T | MAX1361EUB+ | MAX1362EUB+ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 10-uMAX (10-TFSOP/MSOP, 3.00 mm) | 10-uMAX (same) | 10-uMAX (same) | 10-uMAX (same) | 10-uMAX (same) | 10-uMAX (same) |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 10 bits | 10 bits |
| Input Channels | 4 (2 diff / 4 SE) | 4 (2 diff / 4 SE) | 4 (2 diff / 4 SE) | 4 (2 diff / 4 SE) | 4 (single-ended) | 4 (differential) |
| Sampling Rate (max) | 133 ksps | 133 ksps | 133 ksps | 133 ksps | 150 ksps | 150 ksps |
| Internal Reference | 2.048 V | 4.096 V | 2.048 V | 2.048 V | 2.048 V | 2.048 V |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Shipping Carrier | Tube | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
| Window Comparator | Yes (programmable) | Yes (programmable) | Yes (programmable) | Yes (programmable) | Yes (programmable) | Yes (programmable) |
Key Differentiators
- Integrated programmable window comparator with SMBus Alert response (vs Generic 12-bit SAR ADC without on-chip comparator)
- Single uMAX-10 footprint spans 10-bit and 12-bit resolutions (vs MAX1361 (10-bit) on same footprint)
- Only 0.5 uA shutdown current with reference off (vs Generic 12-bit ADC with 5-10 uA shutdown)
Design Notes
The MAX1363MEUB+ operates from a single 2.7 V to 3.6 V supply. Place a 0.1 uF X7R or better ceramic decoupling capacitor within 5 mm of the AVDD pin and pair it with a 1 uF to 10 uF bulk capacitor on the same net. The reference output requires a 0.1 uF bypass capacitor directly at the REF pin; do not omit this cap because the internal reference stability depends on it. Estimated: with the internal reference enabled, quiescent current is approximately 660 uA at 133 ksps; budget at least 1 mA for margin to support settling transients at full sample rate.
Do not drive any analog input above AVDD + 0.3 V or below AGND - 0.3 V - the part lacks internal input clamps, and overdriven inputs can latch up the converter core. For multiplexed inputs feeding higher-voltage signals, add external clamp diodes such as BAV99 to AVDD/AGND. When using single-ended mode, unused analog inputs must be tied to AGND through 100 kohm resistors rather than left floating, otherwise excessive supply current can result from the floating input stage.
Route the analog ground (AGND) and digital ground returns to a star point under the IC, isolating the analog AIN traces from the digital SMBus lines. Keep the analog input traces short and surrounded by AGND guard pours on the PCB. The SDA and SCL lines should each have a 10 kohm pull-up to a logic-level rail (typically the same 3.3 V as AVDD). For best noise rejection, isolate the SMBus Alert open-drain output via a dedicated 10 kohm pull-up tied to the same rail.
Compliance Information
The '+' suffix on the MPN designates lead-free RoHS-compliant packaging per Maxim Integrated ordering information. Detailed REACH and conflict-minerals compliance statements are maintained on Analog Devices' regulatory compliance page for this part family.
