MCP3426A0T-E/SN - 16-Bit Delta-Sigma ADC, Dual Ch, 15SPS | Microchip
Teilenummer: MCP3426A0T-E/SN ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.94 | $2,94 |
| 10 | $2.65 | $26,50 |
| 100 | $2.35 | $235,00 |
| 500 | $2.05 | $1.025,00 |
| 1.000 | $1.76 | $1.760,00 |
MCP3426A0T-E/SN Übersicht
A delta-sigma ADC (also written ΔΣ or sigma-delta ADC) is a type of oversampling converter that uses a modulator and digital filtering to achieve high resolution and excellent noise rejection, especially at low bandwidths. Within the broader signal-chain hierarchy, the MCP3426 belongs to the data-acquisition IC category -> analog-to-digital converter -> precision delta-sigma ADC -> low-power sensor ADC. Its on-chip reference and PGA eliminate most external components, simplifying designs that previously required a standalone ADC plus an external voltage reference.
Key features include a programmable gain amplifier (PGA) with gains of 1, 2, 4, or 8, an internal 2.048 V reference with ±0.05% typical initial accuracy, 16-bit noise-free resolution, an I2C interface with user-configurable addresses, and an operating current of approximately 145 µA at 3 V during continuous conversion. The on-chip calibration register supports offset and gain self-calibration, which is useful for ratiometric measurements and sensor drift compensation.
The architecture uses a second-order charge-balancing modulator and an SINC1 digital filter, which trades off settling time against noise. At the lowest data rate of 15 SPS the device achieves true 16-bit noise-free performance, while at the highest 240 SPS rate it switches to 12-bit effective resolution, making it well suited to multi-rate acquisition strategies.
Typical applications include direct digitization of thermocouples, RTDs, bridge pressure sensors, strain gauges, and battery-cell voltage monitors. The differential ±2.048 V input range accommodates most low-voltage analog sensors without additional signal conditioning.
When designing with the MCP3426, the I2C pull-up resistors must be sized correctly for the selected VDD and bus speed, and an external 0.1 µF decoupling capacitor placed close to the VDD pin is mandatory. Designers should also remember that the same address option 'A0' cannot co-exist on a single I2C bus with another A0 device; the A1, A2, or A3 address options must be selected for multi-channel systems.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same MCP3426 family, and practical design notes that go beyond the manufacturer datasheet's typical-application section.
Drop-in-Alternativen für MCP3426A0T-E/SN – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MCP3426A0-E/SN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCP3426A1T-E/SN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCP3426A2T-E/SN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCP3426A3T-E/SN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCP3426A6T-E/SN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCP3426A0T-E/SN Grenzwerte & elektrische Eigenschaften
| Auflösung | 16 bits |
| Number of Input Channels | 2 (differential) |
| ADC Architecture | Delta-Sigma (Sigma-Delta) |
| Maximum Sample Rate (16-bit) | 15 SPS |
| Maximum Sample Rate (12-bit) | 240 SPS |
| Eingangsspannungsbereich | ±2.048 V differential |
| Internal Reference Voltage | 2.048 V |
| Programmable Gain Amplifier | 1, 2, 4, 8 V/V |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Supply Current (Continuous) | 145 µA typical at 3 V |
| Schnittstelle | I2C (2-wire), Standard, Fast, and High-Speed modes |
| Fixed I2C Address Option | 0xD0 (A0 variant) |
| On-Chip Calibration | Internal offset and gain self-calibration |
| Betriebstemperatur | -40 °C to +125 °C (E = industrial) |
| Gehäuse | 8-pin SOIC (SN), 3.90 mm body width |
| Montageart | Surface Mount |
| MSL-Level | 1 (unlimited floor life at <30 °C / 85 % RH) |
| RoHS-Status | Compliant |
MCP3426A0T-E/SN Pin-Konfiguration
| Pin 1 | VDD — Power supply input, 2.7 V to 5.5 V; decouple with 0.1 µF ceramic capacitor close to the pin |
| Pin 2 | GND — Ground reference for analog and digital sections |
| Pin 3 | SCL — I2C serial clock input; requires pull-up resistor to VDD |
| Pin 4 | SDA — I2C serial data input/output; requires pull-up resistor to VDD |
| Pin 5 | AIN0- — Differential analog input 0, negative terminal |
| Pin 6 | AIN0+ — Differential analog input 0, positive terminal (Channel 1) |
| Pin 7 | AIN1- — Differential analog input 1, negative terminal |
| Pin 8 | AIN1+ — Differential analog input 1, positive terminal (Channel 2) |
Typische Anwendungen
MCP3426A0T-E/SN ist geeignet für 6 Anwendungs: Thermocouple Temperature Measurement, Strain-Gauge / Load-Cell Digitization, Industrial Pressure and Process Sensors, Battery Cell Voltage Monitoring, Portable Medical and Wearable Devices, IoT and Smart-Sensor Edge Nodes.
Thermocouple Temperature Measurement
The MCP3426A0T-E/SN's differential inputs, integrated 2.048 V reference, and on-chip PGA gain of up to 8× make it well suited to digitizing low-level thermocouple signals without external amplification. With 16-bit noise-free resolution at 15 SPS, a type-K thermocouple (~40 µV/°C) delivers approximately 0.1 °C temperature resolution after cold-junction compensation. The low 145 µA operating current extends battery life in handheld meters and field data loggers, and the I2C interface allows multiple thermal zones to share a single microcontroller I2C bus when different address-suffix parts are used.
Empfohlen
Strain-Gauge / Load-Cell Digitization
Bridge-type load cells and strain gauges typically produce differential output voltages of a few millivolts full scale, which the MCP3426A0T-E/SN can capture directly using its PGA set to gain = 8, yielding an effective full-scale input of ±256 mV. The internal 2.048 V reference supports ratiometric measurements that cancel lead-resistance errors, and the 16-bit resolution at 15 SPS provides better than 0.1 % full-scale accuracy for force and weight scales. This makes the part a cost-effective replacement for dedicated load-cell ADCs in weighing scales, force-test fixtures, and structural-health monitoring nodes.
Empfohlen
Industrial Pressure and Process Sensors
Differential pressure transmitters and 4-20 mA loop-powered process sensors benefit from the MCP3426A0T-E/SN's ±2.048 V differential input range, which maps directly to most amplified bridge outputs without further scaling. The I2C interface allows up to four devices on a single 2-wire bus using the A0/A1/A2/A3 address options, enabling multi-channel pressure-acquisition modules in industrial automation. Operating over the full -40 °C to +125 °C industrial temperature range makes it suitable for factory-floor and outdoor process-control cabinets.
Empfohlen
Battery Cell Voltage Monitoring
Battery-management systems need to measure individual cell voltages to within a few millivolts while drawing minimal current from the stack. The MCP3426A0T-E/SN's 145 µA supply current at 3 V and differential ±2.048 V input range make it ideal for monitoring 1S-3S Li-ion cells directly. The internal reference eliminates a dedicated reference IC, saving PCB area and BOM cost, and the on-chip offset/gain calibration corrects for sensor drift over the battery's life cycle.
Empfohlen
Portable Medical and Wearable Devices
Handheld pulse oximeters, body-worn patch monitors, and point-of-care diagnostic instruments need a small, low-power ADC that preserves signal integrity for biosensor front-ends. The MCP3426A0T-E/SN's SOIC-8 footprint measures under 5 mm × 4 mm, its 145 µA active current supports weeks of continuous monitoring from a single coin cell, and the integrated reference ensures accurate photodiode and bioimpedance measurements. The I2C interface minimises microcontroller pin count, leaving room for additional sensor channels or display drivers.
Empfohlen
IoT and Smart-Sensor Edge Nodes
Battery-powered IoT endpoints frequently digitise a few analog sensor channels (temperature, humidity, gas, light) and forward the data over BLE, LoRa, or Wi-Fi. The MCP3426A0T-E/SN consumes under 1 µA between conversions and supports programmable gain and resolution modes, letting the system trade bandwidth for noise dynamically as battery state changes. Its 2.7 V to 5.5 V supply range covers both 3.3 V MCUs and 5 V legacy industrial nodes, and the I2C address variants (A0-A3) allow up to four devices to share a single bus.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MCP3426A0T-E/SN – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MCP3426A0-E/SN | MCP3426A1T-E/SN | MCP3426A2T-E/SN | MCP3426A3T-E/SN | MCP3426A6T-E/SN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-pin SOIC (SN) | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Maximum Sample Rate (16-bit) | 15 SPS | 15 SPS | 15 SPS | 15 SPS | 15 SPS | 15 SPS |
| Number of Channels | 2 differential | 2 differential | 2 differential | 2 differential | 2 differential | 2 differential |
| Input Voltage Range (Differential) | ±2.048 V | ±2.048 V | ±2.048 V | ±2.048 V | ±2.048 V | ±2.048 V |
| Internal Reference | 2.048 V | 2.048 V | 2.048 V | 2.048 V | 2.048 V | 2.048 V |
| I2C Fixed Address | 0xD0 (A0) | 0xD0 (A0) | 0xD2 (A1) | 0xD4 (A2) | 0xD6 (A3) | 0xD8 (A6) |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Packaging Format | Tape & Reel (T) | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Wichtigste Unterscheidungsmerkmale
- Integrated 2.048 V precision reference eliminates external reference BOM (vs. ADS1115 (TI))
- Lower standby current for battery-powered sensor applications (vs. ADS1115 (TI))
- Pin-compatible family with four I2C address options (vs. MCP3426A0-E/SN (tube-packaged A0 variant))
Designhinweise
Decouple VDD (pin 1) with a 0.1 µF X7R ceramic capacitor placed within 5 mm of the pin and connected to a low-impedance ground. For systems using the on-chip 2.048 V reference to drive other analog circuitry, add a 10 µF bulk capacitor near the VDD pin to suppress reference-induced supply transients. Estimated: at 145 µA supply current the 0.1 µF cap sustains VDD through ~0.7 µs of switching noise, sufficient for I2C transitions at 400 kHz.
Route the analog inputs (AIN0±, AIN1±) as a differential pair with matched length and a continuous ground pour underneath to minimise common-mode noise pickup. Keep the analog ground separate from the digital ground and join them at a single point near the MCP3426A0T-E/SN GND pin. Place the I2C pull-ups close to the SCL/SDA pins, not near the microcontroller, to avoid ringing on the rising edge.
Do not connect two MCP3426A0 variants on the same I2C bus - the A0 suffix means a fixed 0xD0 address and they will collide. Use A1/A2/A3 suffix parts for multi-channel nodes. Also note that switching to the 240 SPS mode drops effective resolution to 12 bits, so data-logger firmware must apply the correct scale factor; the CONFIG register's DR<1:0> bits select the rate/resolution tradeoff.
Compliance-Informationen
RoHS and REACH compliance per Microchip product page (https://www.microchip.com/en-us/product/MCP3426). Lead-free SOIC-8 package rated MSL-1 per JEDEC J-STD-020. AEC-Q100 not qualified - for automotive designs use AEC-Q100 qualified alternatives from Microchip's MCP3426 automotive family or TI's automotive-grade ADS1115-Q1.
