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Analog Devices Inc./Maxim Integrated MAX110BCAP
- Part No.:
- MAX110BCAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX110BCAP.pdf
- Description:
- IC ADC 14BIT SIGMA-DELTA 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,205
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Product details
Overview
MAX110BCAP from Maxim Integrated is a ±14-bit, 2-channel sigma-delta analog-to-digital converter (ADC) with internal auto-calibration, operating from ±5V supplies and delivering 0.03% INL over –3V to +3V differential input range. It achieves up to 50 conversions/sec with 50Hz/60Hz rejection, consumes only 550µA active current and 4µA in power-down mode, and interfaces via SPI/QSPI/MICROWIRE-compatible serial protocol - ideal for high-resolution battery-powered process control and panel metering.
For engineers reviewing the MAX110BCAP datasheet, MAX110BCAP pinout, MAX110BCAP application, or MAX110BCAP equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in Maxim's official MAX110/MAX111 datasheet Rev 5 (11/98) and confirmed SSOP-20 implementation details.
Technical Context
The MAX110BCAP implements a first-order sigma-delta architecture with integrated voltage-to-current converter, precision integrator, comparator, and 1-bit DAC feedback loop. Its 16-bit serial output includes sign (POL), overrange (OFL), and 14 data bits in two's-complement format, with conversion timing programmable via CONV1–CONV4 control bits.
It supports dual clocking modes: external TTL/CMOS clock applied to XCLK (RCSEL = GND) or internal RC oscillator (RCSEL = VDD), with oversampling clock (fOSC) selectable at ÷1, ÷2, or ÷4 division ratios. Calibration is performed under µP control and corrects both offset and gain errors without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | ±14-bit plus sign and overrange bit - delivers 16-bit serial output with unambiguous polarity and saturation detection. |
| Differential Input Range | –3V to +3V - enables direct measurement of bipolar industrial sensor outputs without signal conditioning. |
| INL (Integral Nonlinearity) | ±0.03% FSR - ensures <1 LSB error across full scale, critical for weigh-scale and precision instrumentation accuracy. |
| Supply Current (Active) | 550 µA - allows multi-year operation on coin-cell batteries in remote sensing nodes. |
| Power-Down Current | 4 µA - reduces system standby power to negligible levels during idle intervals. |
| Conversion Rate | Up to 50 conversions/sec - supports real-time monitoring of slow-varying physical parameters (e.g., temperature, pressure). |
| Power Supply Rejection | 30 ppm - maintains accuracy despite ±5% variation in ±5V rails, eliminating need for ultra-stable LDOs. |
Pinout & Package
MAX110BCAP is housed in a 20-pin shrink small-outline package (SSOP) with 0.65 mm lead pitch, optimized for high-density PCB layouts while maintaining thermal and electrical performance comparable to DIP/SO variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | IN1+, IN1– | Differential channel 1 analog inputs - accept ±3V signals referenced to internal common-mode level; absolute pin voltage must stay within (VSS + 2.25V) to (VDD – 2.25V). |
| 2, 3 | REF–, REF+ | Differential reference inputs - set full-scale range (e.g., ±1.5V → ±3V input); VREF = VREF+ – VREF–, max 3V. |
| 4, 5 | N.C. | No internal connection - must be left unconnected; not used for decoupling or grounding. |
| 6 | VDD | +5V analog/digital supply - requires local 0.1 µF ceramic bypass capacitor to AGND. |
| 7 | RCSEL | Mode select for clock source - tie to VDD for internal RC oscillator; tie to GND for external XCLK input. |
| 8 | XCLK | Oversampling clock I/O - drives internal sigma-delta modulator; load ≤10 pF when using internal oscillator. |
| 9 | SCLK | Serial interface clock - accepts DC to 2 MHz; controls timing of DIN/DOUT data transfers and BUSY assertion. |
| 10 | BUSY | Open-drain status indicator - goes low at conversion start, high at completion; used for interrupt-driven µP synchronization. |
| 11 | CS | Chip-select active-low - initiates serial transaction; rising edge triggers conversion if NO-OP = 1 in control word. |
| 12 | DOUT | Serial data output - three-state, high-impedance when CS high; outputs 16-bit result MSB-first on SCLK falling edge. |
| 13 | DIN | Serial data input - loads 16-bit control word (NO-OP, CHS, CAL, PD, etc.) on SCLK rising edge. |
| 14, 15 | IN2–, IN2+ | Differential channel 2 analog inputs - identical electrical specs to IN1±; selected via CHS bit in control register. |
| 16 | VSS | –5V analog supply - separate from digital ground; requires dedicated low-impedance return path to minimize noise coupling. |
| 17 | AGND | Analog ground - internal connection point for reference and analog circuitry; must be tied to system analog ground plane. |
| 18, 19 | N.C. | No internal connection - floating; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-calibration under µP control | Enables offset and gain correction in-system without trim pots or factory calibration - reduces BOM cost and field drift. |
| 50Hz/60Hz rejection | Integrated digital filtering eliminates mains-induced noise in industrial environments without external notch filters. |
| No external components required | Full functionality achieved with only bypass capacitors - simplifies layout, improves reliability, and cuts assembly cost. |
| Two differential input channels | Reduces component count in multi-sensor systems (e.g., dual load cells or thermocouple pairs) with single-chip sequencing. |
| ±5V dual-supply operation | Supports true bipolar signal acquisition - avoids level-shifting circuitry needed with single-supply ADCs. |
Applications
| Process Control Monitoring | Weigh Scale Front-End |
|---|---|
|
Use Scenario: Continuous acquisition of 4–20mA loop signals from pressure, flow, and level transmitters in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC converting conditioned analog sensor outputs into calibrated digital values for Modbus RTU transmission. Use Value: ±0.03% INL and 50Hz rejection ensure stable readings under noisy plant-floor conditions without software compensation. |
Use Scenario: High-precision weight measurement in commercial bench scales using strain-gauge bridges. IC Role / Device Role / Timing Role: Sigma-delta ADC digitizing bridge differential output with built-in offset/gain calibration for zero-span adjustment. Use Value: Internal auto-calibration eliminates manual potentiometer trimming during manufacturing, reducing test time by >40%. |
| Panel Meter Signal Chain | Remote Temperature Node |
|
Use Scenario: Digital front-panel display in industrial HMIs requiring accurate, flicker-free analog readouts (e.g., voltage, current, power). IC Role / Device Role / Timing Role: High-resolution ADC feeding real-time numeric display and alarm logic in microcontroller-based meters. Use Value: 50 conversions/sec and 16-bit serial output enable smooth 20 Hz update rates with minimal µP overhead. |
Use Scenario: Battery-powered wireless sensor node measuring thermistor or RTD outputs in HVAC or environmental monitoring. IC Role / Device Role / Timing Role: Low-power ADC acquiring slow-varying temperature data, then entering 4µA shutdown between samples. Use Value: 4µA shutdown current extends CR2032 battery life beyond 5 years at 1-sample-per-minute duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | Single-supply (2.0–5.5V), I²C interface, 16-bit resolution, no internal reference - requires external VREF and level-shifting for ±5V systems. | Best suited for low-voltage embedded systems (e.g., Raspberry Pi add-ons); lacks native ±5V analog input support. | Select when I²C bus availability and ultra-low power (<150µA) outweigh need for bipolar input and SPI compatibility. |
| AD7714BRUZ | 24-bit sigma-delta, ±5V supply, SPI interface, integrated PGA and reference - larger footprint (24-TSSOP), higher cost, and 10× slower max throughput (1kSPS vs 50SPS). | Targeted at high-end instrumentation where resolution >16-bit and programmable gain are mandatory. | Choose only if 24-bit resolution and on-chip PGA justify added complexity, cost, and board area versus MAX110BCAP's optimized 14-bit performance. |
Compared with ADS1115IDGSR and AD7714BRUZ, the MAX110BCAP uniquely balances ±5V bipolar input capability, SPI compatibility, sub-1mW active power, and proven 0.03% INL in a compact 20-SSOP - making it the optimal choice for cost-sensitive, battery-operated industrial measurement where true differential ±3V range is essential.
Availability
MAX110BCAP is available at Aetrix Electronics and suitable for process control, weigh scale electronics, and panel meter designs requiring stable component supply, long-term manufacturability, and guaranteed traceability through Maxim's discontinuation lifecycle management.
Supply support for MAX110BCAP 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, automotive, and communications markets.
The MAX110 family was designed specifically for high-accuracy, low-power, multi-channel data acquisition in space-constrained industrial instrumentation - emphasizing self-calibration, noise immunity, and minimal external component count.
FAQ
What is the operating temperature range for MAX110BCAP?
The MAX110BCAP is specified for 0°C to +70°C ambient operation, as indicated by the 'C' grade suffix in its ordering code. This commercial-grade rating aligns with its target applications in panel meters, bench instruments, and non-military industrial equipment where extended temperature ranges are not required. The device's internal calibration remains effective across this full range, ensuring consistent ±0.03% INL performance without derating.
Does MAX110BCAP require external reference components?
No, the MAX110BCAP does not require external reference components for basic operation. It accepts a differential reference input (REF+ and REF–) that can be driven directly from a stable voltage source (e.g., precision bandgap or external reference IC). While the device contains no internal reference, its architecture is designed to function with externally supplied VREF up to 3V - eliminating need for resistive dividers or op-amp buffers in most implementations.
How does the auto-calibration feature work in MAX110BCAP?
The MAX110BCAP performs offset and gain calibration under microprocessor control via dedicated bits (CAL and NUL) in its 16-bit control register. When CAL = 1, the ADC executes an internal sequence that measures and stores correction coefficients in on-chip registers. These coefficients are automatically applied to subsequent conversions, achieving ±0.03% INL without external hardware. Calibration can be triggered at power-up, periodically during operation, or on demand - providing flexibility for drift compensation in long-life systems.
Can MAX110BCAP interface directly with an 8051 microcontroller?
Yes, the MAX110BCAP is fully compatible with the 8051 family, including the 80C32 variant. Its SPI/QSPI/MICROWIRE-compatible serial interface uses standard signals (CS, SCLK, DIN, DOUT, BUSY) and operates with DC–2MHz clocks - matching typical 8051 port speeds. Maxim's application note and evaluation kit (MAX110BC/D) provide verified schematics and firmware examples for seamless integration, including BUSY-interrupt driven conversion sequencing and control-word formatting.
What is the purpose of the OFL (overrange) bit in MAX110BCAP output?
The OFL bit in the MAX110BCAP's 16-bit serial output indicates when the differential input voltage exceeds ±VREF. It is asserted before hard saturation occurs - typically when |VIN| > 1.0 × VREF - allowing firmware to detect out-of-range conditions early and initiate corrective action (e.g., range switching, alarm logging, or sensor fault reporting). Unlike saturation flags in flash ADCs, OFL operates reliably across temperature and supply variations because it is derived from the sigma-delta modulator's duty-cycle behavior.
MAX110BCAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bag
- 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:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX110BCAP FAQ
1.How can I place an order for MAX110BCAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX110BCAP 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 MAX110BCAP reliable?
The price and inventory of MAX110BCAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX110BCAP is usually 5 days.
3.What payment methods are accepted for MAX110BCAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX110BCAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX110BCAP?
MAX110BCAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX110BCAP 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 MAX110BCAP?
For technical support, including MAX110BCAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX110BCAP requirements.
6.How does Aetrix verify that MAX110BCAP is sourced from the original manufacturer or authorized distributors?
All MAX110BCAP 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 MAX110BCAP meets industry standards.
7.What is the process for return or replacement of MAX110BCAP?
All MAX110BCAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX110BCAP, 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 MAX110BCAP part is unused and in its original packaging.
Return procedure for MAX110BCAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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