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Analog Devices Inc./Maxim Integrated MAX110ACWE
- Part No.:
- MAX110ACWE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX110ACWE.pdf
- Description:
- IC ADC 14BIT SIGMA-DELTA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,482
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Product details
Overview
MAX110ACWE from Maxim Integrated is a ±14-bit, 2-channel sigma-delta analog-to-digital converter (ADC) operating from ±5V supplies with differential input range of –3V to +3V. It delivers 0.03% INL, 550µA active supply current, and 4µA power-down current, enabling high-resolution measurement in battery-powered process control and panel meter systems.
For engineers reviewing the MAX110ACWE datasheet, MAX110ACWE pinout, MAX110ACWE application, or MAX110ACWE equivalent, this device supports SPI/QSPI/MICROWIRE serial interfaces, features auto-calibration for offset/gain correction, and requires no external components-making it suitable for low-noise, space-constrained industrial sensing designs.
Technical Context
The MAX110ACWE implements a first-order sigma-delta modulator with integrated voltage-to-current conversion, integrator, comparator, 1-bit DAC, and up/down counter. Its oversampling clock (fOSC) is programmable via internal RC oscillator or external source, with division ratios of 1/2/4.
Conversion output is 16-bit serial data (sign bit + overrange bit + 14 data bits) in two's-complement format, synchronized to SCLK falling edge. BUSY signal indicates conversion status, and CS-controlled control-word writes configure channel selection, conversion time, and calibration modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | ±14-bit (14 data bits + sign + overrange), delivering 32,768 distinct codes across ±VREF input range |
| INL (Relative Accuracy) | ±0.03% FSR - ensures ≤±5 LSB error across full ±3V input span at +25°C |
| Supply Current | 550 µA (active), 4 µA (power-down) - enables multi-year operation on coin-cell batteries |
| Input Range | Differential ±3V (–3V to +3V) with ±5V supplies - supports direct connection to industrial transducer outputs |
| Reference Input | VREF+ = +1.5V, VREF– = –1.5V (±3V total) - sets full-scale range and enables 50Hz/60Hz rejection |
| Conversion Rate | Up to 50 conversions/sec (81,920 clocks/conv @ 1MHz XCLK ÷2 mode) - balances speed and noise performance |
| Interface Compatibility | SPI, QSPI (CPHA=0, CPOL=0), MICROWIRE - eliminates need for protocol translation logic |
Pinout & Package
MAX110ACWE is housed in a 16-pin Wide SO (SOIC-W) package with 0.3" body width and standard gull-wing lead form. Pin layout matches industry-standard 16-pin SO footprints and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1+, IN1– | Differential Channel 1 Analog Input | Accepts ±3V differential signal; common-mode range constrained to (VSS + 2.25V) to (VDD – 2.25V) |
| IN2+, IN2– | Differential Channel 2 Analog Input | Second independent input pair; shares same reference and conversion engine as IN1 |
| REF+, REF– | Differential Reference Inputs | Defines full-scale range (VREF = VREF+ – VREF–); must be stable ±1.5V for specified accuracy |
| VDD, VSS | Positive/Negative Power Supplies | ±5V ±5% required; VSS = –5V enables true bipolar input operation |
| CS, SCLK, DIN, DOUT | Serial Interface Control/Data Lines | Enable SPI-compatible 16-bit read/write; DOUT is high-Z when CS high |
| BUSY | Conversion Status Output | Active-low open-drain signal indicating conversion in progress; used for interrupt-driven polling |
| RCSEL, XCLK | Oversampling Clock Configuration | RCSEL = VDD selects internal RC oscillator; RCSEL = GND enables external TTL/CMOS clock on XCLK |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Calibration Mode | Microprocessor-controlled offset and gain calibration eliminates need for manual trimming or external precision resistors |
| No External Components Required | Complete ADC function-including reference scaling, filtering, and serial interface-implemented monolithically |
| 50Hz/60Hz Rejection | Integrated digital filtering rejects line-frequency interference without external notch filters or software averaging |
| Low-Power Shutdown | 4µA quiescent current in power-down mode extends battery life in intermittent-sampling applications |
| Two Differential Input Channels | Hardware-multiplexed dual inputs reduce PCB area and BOM count versus discrete ADC solutions |
Applications
| Process Control Monitoring | Weigh Scale Signal Conditioning |
|---|---|
|
Use Scenario: Continuous monitoring of pressure, flow, or temperature transducers in PLC-based industrial automation cabinets. IC Role / Device Role / Timing Role: Primary high-resolution ADC digitizing 4–20mA loop outputs or bridge sensor signals with ±3V differential range. Use Value: 0.03% INL and 50Hz rejection ensure accurate readings despite noisy factory floor environments and AC mains coupling. |
Use Scenario: Precision weight measurement in commercial bench scales using strain-gauge load cells. IC Role / Device Role / Timing Role: Front-end ADC converting mV-level differential outputs from Wheatstone bridges into calibrated digital values. Use Value: Auto-calibration compensates for thermal drift in load cell and PCB traces, maintaining accuracy across 0°C to +70°C operating range. |
| Panel Meter Front-End | Data-Acquisition System Channel |
|
Use Scenario: Embedded digital panel meters displaying real-time voltage, current, or process variable readings. IC Role / Device Role / Timing Role: Standalone ADC interfacing directly to microcontroller via SPI, eliminating external level-shifting or buffering. Use Value: 16-pin SO package and zero external components reduce board space and assembly cost versus multi-chip alternatives. |
Use Scenario: Modular DAQ modules acquiring slow-varying sensor data (e.g., thermocouples, RTDs) in test equipment. IC Role / Device Role / Timing Role: Channel-specific ADC with configurable conversion time (10k–100k clocks) optimizing resolution vs. throughput per channel. Use Value: Programmable oversampling clock divider allows trade-off between noise floor (–10dB per doubling) and update rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1256IDBT | 24-bit resolution, 30kSPS max, single +5V supply only, no ±VSS support | Requires external reference and PGA; better for ultra-high-resolution lab instruments, not direct drop-in | Select if >16-bit resolution and higher throughput are needed; verify ±5V dual-supply compatibility is unnecessary |
| AD7730BRUZ | 16-bit, 1.2kSPS, ±5V supply, but uses switched-capacitor architecture and requires external crystal | Higher power (1.2mA), no auto-calibration; suited for fixed-frequency industrial sensors | Choose when crystal-referenced timing stability is critical and calibration overhead can be managed externally |
Compared with ADS1256IDBT and AD7730BRUZ, the MAX110ACWE uniquely combines ±5V dual-supply operation, embedded auto-calibration, and zero-external-component implementation-making it optimal for cost-sensitive, battery-powered, or space-constrained industrial measurement where ±3V input range and 0.03% INL are primary requirements.
Availability
MAX110ACWE is available at Aetrix Electronics and suitable for process control monitoring, weigh scale signal conditioning, and panel meter front-end applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX110ACWE 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications systems.
The MAX110 product line was designed specifically for low-power, high-accuracy industrial data acquisition-emphasizing ease of integration, minimal external components, and robust noise immunity in electrically harsh environments.
FAQ
What supply voltages does the MAX110ACWE require?
The MAX110ACWE requires dual ±5V supplies: VDD = +5V ±5% and VSS = –5V ±5%. This configuration enables its ±3V differential input range and true bipolar operation. Operating outside these limits risks violating absolute maximum ratings and degrading INL or causing latch-up. The MAX110ACWE does not support single-supply operation-unlike the MAX111 family members.
How does the MAX110ACWE achieve 0.03% INL accuracy without external calibration components?
The MAX110ACWE achieves 0.03% INL through an internal auto-calibration sequence controlled by the CAL bit in its 16-bit control register. During calibration, the device measures its own offset and gain errors using internal references, then applies digital correction to subsequent conversions. This eliminates the need for external trimpots, laser-trimmed resistors, or system-level calibration routines-reducing BOM cost and field recalibration labor.
Can the MAX110ACWE interface directly with an 8051 microcontroller using SPI mode?
Yes, the MAX110ACWE interfaces directly with 8051-family microcontrollers (e.g., 80C32) using SPI mode. Its CS, SCLK, DIN, and DOUT pins are TTL/CMOS-compatible, and timing parameters (e.g., tCSS = 100ns, tDO = 140ns) meet standard 8051 I/O speeds. Figure 7c in the datasheet shows a verified hardware connection using Port 1 pins, with BUSY tied to an interrupt input for efficient polling-free operation.
What is the purpose of the OFL (overrange) bit in the MAX110ACWE output word?
The OFL bit in the MAX110ACWE's 16-bit output word (bit position 14, after sign bit) indicates when the input voltage exceeds ±VREF. It asserts before hard saturation-typically at ±1.2 × VREF-allowing firmware to detect overrange conditions early and initiate corrective action (e.g., range switching or alarm). Unlike saturation flags in flash ADCs, OFL operates reliably within the device's specified reference voltage tolerance.
Does the MAX110ACWE support simultaneous sampling of both input channels?
No, the MAX110ACWE does not support simultaneous sampling. It uses a single sigma-delta modulator with hardware-multiplexed inputs: CHS bit in the control register selects either IN1 or IN2 for conversion, and only one channel is sampled per conversion cycle. For true simultaneous acquisition, separate ADCs or a dedicated dual-sampling device (e.g., AD7606) would be required.
MAX110ACWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 50
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- ±5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX110ACWE FAQ
1.How can I place an order for MAX110ACWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX110ACWE 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 MAX110ACWE reliable?
The price and inventory of MAX110ACWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX110ACWE is usually 5 days.
3.What payment methods are accepted for MAX110ACWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX110ACWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX110ACWE?
MAX110ACWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX110ACWE 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 MAX110ACWE?
For technical support, including MAX110ACWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX110ACWE requirements.
6.How does Aetrix verify that MAX110ACWE is sourced from the original manufacturer or authorized distributors?
All MAX110ACWE 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 MAX110ACWE meets industry standards.
7.What is the process for return or replacement of MAX110ACWE?
All MAX110ACWE units undergo pre-shipment inspection (PSI). If there is an issue with MAX110ACWE, 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 MAX110ACWE part is unused and in its original packaging.
Return procedure for MAX110ACWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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