MAX1396MUB+ - 12-Bit 312.5ksps SAR ADC | Maxim Integrated
Teilenummer: MAX1396MUB+ ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.32 | $6,32 |
| 10 | $5.74 | $57,40 |
| 100 | $5.08 | $508,00 |
| 500 | $4.55 | $2.275,00 |
| 1.000 | $4.02 | $4.020,00 |
MAX1396MUB+ Übersicht
A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a sampling ADC architecture that performs one bit-trial per clock cycle, combining a precision DAC with a comparator and SAR register to resolve an analog input into an N-bit code within N cycles. Compared with delta-sigma or pipeline ADCs, SAR converters offer deterministic latency, low power dissipation, and excellent dynamic performance at moderate sampling rates, making them the dominant topology for multiplexed data-acquisition front ends, industrial sensors, and battery-powered instrumentation.
The MAX1396MUB+ features automatic channel scanning, an SPI-/QSPI-/MICROWIRE-compatible serial interface, and on-chip 4.096V internal reference. Its ±6V fault-protected analog inputs survive transients well beyond the supply rails, an important property for industrial sensors exposed to wiring faults. The internal reference eliminates external reference cost while maintaining 1 LSB INL and 1 LSB DNL (max) linearity.
Typical applications include portable data loggers, medical instrumentation (glucose meters, blood-pressure monitors), 4-20 mA loop-powered sensor transmitters, and battery-powered multimeters. The MAX1396's automatic power-down between conversions reduces average supply current to 1.4 µA at low throughput, extending battery life in duty-cycled designs.
When designing with the MAX1396MUB+, place the 0.1 µF input/output bypass capacitors as close to the IC pins as possible. The internal reference requires a 4.7 µF external bypass capacitor; insufficient decoupling will degrade linearity. The serial interface timing must respect the 40 ns minimum SCLK period; high-speed microcontrollers should verify timing margins with the SPI peripheral configured in CPOL=0, CPHA=0 mode.
This page synthesizes distributor pricing, same-family drop-in variants, and practical design notes that complement, but do not replace, the manufacturer datasheet. Engineers comparing the MAX1396MUB+ against the MAX1393 (single-ended only) or the MAX1396ETB (10-pin TDFN) will find parameter-by-parameter guidance and PCB-footprint compatibility analysis in the sections below.
Drop-in-Alternativen für MAX1396MUB+ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MAX1396MUB+ (gleiche Bauform und Footprint) – abweichend in Analog Input Range, DNL (max), Number of Channels, Package, Shutdown Current.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MAX1393MUB+
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MAX1396MUB+T
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$4.78 / Stück
Datenblatt ansehen →MAX1396EUB+
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MAX1396MUB/V+
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MAX1396MUB+ Grenzwerte & elektrische Eigenschaften
| Auflösung | 12 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Channels | 1 differential / 2 single-ended |
| Abtastrate | 312.5 ksps |
| Versorgungsspannung | 1.5 V to 3.6 V (single supply) |
| Supply Current (full speed) | 428 µA (typ) |
| Abschaltstrom | 1.4 µA (typ) |
| Analog Input Range | 0 to VREF (single-ended), ±VREF (true differential) |
| Input Fault Protection | ±6 V without damage |
| INL (max) | ±1 LSB |
| DNL (max) | ±1 LSB |
| Internal Reference | 4.096 V |
| Digital Interface | SPI / QSPI / MICROWIRE compatible |
| Betriebstemperaturbereich | -40 °C to +85 °C |
| Gehäuse | 10-pin µMAX (TSSOP equivalent) |
| Montageart | Surface Mount |
MAX1396MUB+ Pin-Konfiguration
| Pin 1 | AVDD — Analog supply input (1.5 V to 3.6 V) |
| Pin 2 | AIN1 — Analog input channel 1 (single-ended) / positive differential input |
| Pin 3 | AIN2 / REF- — Analog input channel 2 (single-ended) / reference negative (differential) |
| Pin 4 | REF+ / AIN- — Internal reference bypass / negative differential input |
| Pin 5 | GND — Ground |
| Pin 6 | DOUT — Serial data output |
| Pin 7 | SSTRB — Serial strobe output (conversion complete flag) |
| Pin 8 | DIN / SCLK — Serial data input / serial clock |
| Pin 9 | CS — Chip select (active low) |
| Pin 10 | DVDD — Digital supply input |
Typische Anwendungen
MAX1396MUB+ ist geeignet für 6 Anwendungs: Portable Data Loggers, Medical Instrumentation, 4-20 mA Loop-Powered Sensor Transmitters, Battery-Powered Multimeters, Industrial Sensor Interfaces, Touch-Screen / Resistive Sensor Controllers.
Portable Data Loggers
The MAX1396MUB+ suits portable battery-powered data loggers thanks to its 1.5V–3.6V supply range and 1.4 µA shutdown current between conversions. At a 312.5 ksps max sampling rate it captures high-speed transient events while duty-cycled operation keeps average supply current well below 100 µA for multi-channel scanning. The internal 4.096 V reference removes the need for an external reference, shrinking the BOM and PCB area — a critical advantage for compact form-factor loggers. The 10-pin µMAX footprint is hand-solderable, simplifying prototyping of new sensor interfaces. For higher channel counts, cascade multiple MAX1396 chips with isolated SPI buses to keep ground loops in check.
Empfohlen
Medical Instrumentation
Blood-pressure monitors, glucose meters, and pulse-oximeters benefit from the MAX1396MUB+'s ±6 V input fault protection (preventing damage from defibrillator discharge and ESD) and low 428 µA full-speed supply current (extending battery life). The 12-bit resolution comfortably resolves 0.1 % sensor-level signals, while the differential input architecture rejects common-mode 50/60 Hz mains pickup common in clinical environments. The internal 4.096 V reference matches ±5 V transducer outputs scaled through precision dividers. SPI-mode operation simplifies firmware development on common Cortex-M microcontroller hosts used in medical device designs.
Empfohlen
4-20 mA Loop-Powered Sensor Transmitters
The MAX1396MUB+ operates directly from a 3.0 V regulator derived inside 4-20 mA current loops, eliminating the need for a separate analog supply rail. Its 1 differential input channel accepts the ratiometric output of a bridge sensor conditioned through an instrumentation amp (e.g. MAX4209). Low shutdown current (1.4 µA) keeps total loop current draw well under the 3.5 mA minimum loop compliance, preserving full 4-20 mA dynamic range. The SPI interface delivers conversions to a microcontroller that overlays the digital data onto the loop current using a digital potentiometer.
Empfohlen
Battery-Powered Multimeters
Handheld digital multimeters take advantage of the MAX1396MUB+'s low power, wide input range, and small 10-pin µMAX package. Differential input accepts ±4.096 V signals centered on ground when biased through an op-amp network. With a 9 V battery regulator stepped down to 3.3 V, the ADC consumes only 428 µA, leaving ample headroom for the LCD, buzzer, and continuity-test circuitry. The 12-bit resolution provides 1 mV precision on the 4 V range, satisfying most consumer-grade DMM accuracy targets.
Empfohlen
Industrial Sensor Interfaces
Programmable logic controllers (PLCs) and remote terminal units (RTUs) use the MAX1396MUB+ to digitize thermocouple, RTD, and strain-gauge signals through channel multiplexing. ±6 V input protection survives miswiring and field-side transients common in industrial cabinets. The SPI interface allows direct connection to backplane microcontrollers such as the MAXQ2000 family, while the 1.5 V–3.6 V supply tolerates wide 24 V → 3.3 V switching regulator ripple. For redundant architectures, dual MAX1396 ADCs on independent SPI buses deliver fault-tolerant analog acquisition.
Empfohlen
Touch-Screen / Resistive Sensor Controllers
The MAX1396MUB+ digitizes resistive touch-screen X/Y coordinate voltages in handheld terminals and industrial HMIs. Differential input rejects common-mode switching noise injected by backlight inverters, while the 312.5 ksps sampling rate is more than sufficient for real-time touch decoding. The small 10-pin µMAX package fits inside the bezel area next to the display driver IC, simplifying layout. Internal 4.096 V reference scales the touch voltage to full ADC range without precision external resistors.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MAX1396MUB+ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MAX1393MUB+ | MAX1396MUB+T | MAX1396EUB+ | MAX1396MUB/V+ |
|---|---|---|---|---|---|
| Package | 10-pin µMAX (TSSOP-equivalent) | 10-pin µMAX - same | 10-pin µMAX - same | 10-pin µMAX - same | 10-pin µMAX - same |
| Brand | Maxim Integrated (now Analog Devices) | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 312.5 ksps | 312.5 ksps | 312.5 ksps | 312.5 ksps | 312.5 ksps |
| Input Channels | 1 differential / 2 single-ended | 2 single-ended only | 1 differential / 2 single-ended | 1 differential / 2 single-ended | 1 differential / 2 single-ended |
| Differential Input | Yes (true differential) | No (single-ended only) | Yes | Yes | Yes |
| Supply Voltage | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V |
| Supply Current (full speed) | 428 µA (typ) | 428 µA (typ) | 428 µA (typ) | 428 µA (typ) | 428 µA (typ) |
| Automotive Grade | No | No | No | No | Yes (V suffix = automotive qualified) |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
| Input Fault Protection | ±6 V | ±6 V | ±6 V | ±6 V | ±6 V |
Wichtigste Unterscheidungsmerkmale
- True differential input with ±6 V fault protection (vs. MAX1393MUB+)
- Tape-and-reel ready for high-volume SMT production (vs. MAX1396MUB+ (standard tube))
- Internal 4.096 V reference eliminates external reference BOM (vs. MAX1240ACSA+TG069 (external reference))
Designhinweise
Place a 0.1 µF X7R ceramic bypass capacitor as close as possible to the AVDD pin and a 4.7 µF electrolytic or tantalum bulk capacitor on the analog supply rail to filter out switching regulator noise. The MAX1396MUB+ internal reference requires a 0.1 µF bypass on the REF+ pin; without this decoupling, INL degrades by up to 1 LSB. Use separate analog and digital ground planes stitched together at a single point beneath the IC to avoid ground-loop digital noise coupling into the analog input.
Do not apply signals exceeding ±6 V to AIN1/AIN2 in any state — although the inputs are fault-protected, sustained overvoltage stresses internal ESD diodes and may degrade linearity. Always issue a software shutdown via SSTRB between conversions to drop quiescent current to 1.4 µA in battery applications; leaving CS low continuously keeps the ADC in full-power mode (428 µA). When operating at the maximum 312.5 ksps sampling rate, ensure the host SPI clock supports at least 40 ns SCLK period and respect CS-to-SCLK setup time (≥10 ns).
Route the SPI lines (CS, SCLK, DIN, DOUT, SSTRB) as short, parallel, impedance-controlled traces with ground return reference to avoid ringing on a 50 MHz system SPI bus. Keep the analog input traces guarded with ground traces on both sides when the input source impedance exceeds 5 kΩ, since the MAX1396MUB+ sampling capacitor (10 pF typ) will settle slowly otherwise. Position the IC away from switching inductors and high-current return paths on the PCB; a 10 mm keep-out zone around the analog pins is recommended.
Compliance-Informationen
Standard MAX1396MUB+ is not AEC-Q100 qualified; the V-suffix variant MAX1396MUB/V+ is automotive-grade. RoHS, lead-free, and halogen-free declarations per Maxim Integrated product page (acquired by Analog Devices in 2018).
