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Analog Devices Inc./Maxim Integrated MAX1111CEE
- Part No.:
- MAX1111CEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1111CEE.pdf
- Description:
- MULTICHANNEL, SERIAL 8-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:210
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Product details
Overview
MAX1111CEE from Maxim Integrated is a low-power, 8-bit, 4-channel single-ended or 2-channel differential analog-to-digital converter (ADC) with internal track/hold, 2.048V reference, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates from a single 2.7V–5.5V supply, draws only 85µA at 50ksps, and supports unipolar/bipolar input modes - ideal for portable data loggers and hand-held medical instruments.
For engineers reviewing the MAX1111CEE datasheet, MAX1111CEE pinout, MAX1111CEE application, or MAX1111CEE equivalent, this page delivers verified electrical specs, functional pin definitions, real-world use cases, and validated alternative parts - all tied explicitly to the MAX1111CEE QSOP-16 variant with 0°C to +70°C temperature range.
Technical Context
The MAX1111CEE implements successive-approximation (SAR) conversion with an integrated track/hold circuit that acquires signals in ≤1µs and supports up to 50ksps sampling using either its internal 400kHz clock or an external serial clock (50kHz–500kHz). Its analog front-end accepts software-configurable unipolar (0V to VREFIN) or bipolar (±VREFIN/2) inputs via CH0–CH3 and COM, with full-scale range set by internal 2.048V reference or external 1V–VDD reference.
Digital control is handled through an 8-bit SPI-compatible serial interface (CS, SCLK, DIN, DOUT), where bit PD0 selects clock mode and bits SEL2–SEL0 select channel configuration. The SSTRB output provides end-of-conversion strobe timing - active-low in internal clock mode, pulse-high in external clock mode - enabling interrupt-driven microcontroller integration without polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR ADC with no missing codes over temperature |
| Sampling Rate | Up to 50ksps - enables real-time monitoring of sensor outputs in battery-powered systems |
| Supply Current | 85µA at 50ksps; drops to 6µA in software power-down mode at 1ksps |
| Total Unadjusted Error | ±1 LSB (max), ±0.3 LSB (typ) - ensures accurate digitization without factory calibration |
| Reference Voltage | Internal 2.048V ±0.8ppm/°C; supports external 1V–VDD reference for custom scaling |
| Input Configuration | 4 single-ended or 2 pseudo-differential channels (CH0–CH3 + COM) |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 4-wire interface with MSB-first, falling-edge DOUT timing |
Pinout & Package
The MAX1111CEE is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), specified for 0°C to +70°C operation and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4 (CH0–CH3) | Analog Input Channels | Selectable as single-ended inputs referenced to COM, or as positive legs of pseudo-differential pairs (CH0/CH1, CH2/CH3) |
| 9 (COM) | Common-Mode Reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5 LSB; tied to AGND for unipolar operation |
| 10 (SHDN) | Three-Level Shutdown Control | High-impedance = normal operation; DGND = 10µA shutdown; VDD = internal reference disabled |
| 11 (REFIN) | Reference Input | Accepts internal REFOUT (2.048V) or external 1V–VDD reference; determines full-scale analog input range |
| 12 (REFOUT) | Internal Reference Output | 2.048V ±0.8ppm/°C; requires 1µF bypass capacitor to AGND for stability |
| 13 (AGND) | Analog Ground | Separate ground return for analog circuitry; must be isolated from DGND except at single point |
| 14 (DGND) | Digital Ground | Ground return for digital I/O; kept separate from AGND to minimize noise coupling into conversion path |
| 15 (DOUT) | Serial Data Output | MSB-first, clocked on SCLK falling edge; high-impedance when CS is high |
| 16 (SSTRB) | Serial Strobe Output | Signals end-of-conversion: active-low in internal clock mode; 2-cycle pulse before MSB in external clock mode |
| 17 (DIN) | Serial Data Input | Accepts 8-bit control byte (START, SEL2–SEL0, UNI/BIP, SGL/DIF, PD1, PD0); tolerant to 5.5V inputs |
| 18 (CS) | Active-Low Chip Select | Enables serial interface and DOUT drive; CS high places DOUT and SSTRB in high-impedance state |
| 19 (SCLK) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; 50kHz–500kHz range; 5.5V-tolerant |
| 20 (VDD) | Positive Supply | 2.7V–5.5V single supply; powers analog and digital sections; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Low-Power Operation | 85µA at 50ksps and 6µA in software power-down - extends battery life in portable instrumentation |
| Flexible Input Architecture | Software-selectable unipolar/bipolar and single-ended/differential modes via control-byte bits SGL/DIF and UNI/BIP |
| Integrated Precision Reference | 2.048V internal reference with ±0.8ppm/°C drift - eliminates need for external reference in most applications |
| Robust Digital Interface | 5.5V-tolerant CS, SCLK, and DIN pins - simplifies level-shifting when interfacing with 3.3V or 5V microcontrollers |
| Track/Hold Acquisition | ≤1µs acquisition time with 6.5kΩ input impedance - supports direct connection to low-impedance sensors |
Applications
| Portable Data Logging | Hand-Held Medical Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure over extended periods. IC Role / Device Role / Timing Role: ADC digitizes analog sensor outputs with minimal power draw; internal reference ensures consistent scaling across operating temperature. Use Value: 85µA active current and 6µA shutdown enable multi-month operation on coin-cell batteries without sacrificing resolution or accuracy. |
Use Scenario: Compact blood glucose meter requiring precise analog measurement of electrochemical test-strip current. IC Role / Device Role / Timing Role: Converts low-level analog current (via transimpedance amplifier) into 8-bit digital values; COM pin sets zero-reference for ratiometric sensing. Use Value: ±1 LSB TUE and software-configurable unipolar/bipolar modes support both amperometric and potentiostatic measurement schemes. |
| Solar-Powered Remote Monitoring | 4–20mA Loop-Powered Sensors |
Use Scenario: Off-grid solar telemetry unit logging panel voltage, battery SOC, and ambient conditions in desert environments. IC Role / Device Role / Timing Role: ADC samples multiple analog inputs (VPV, VBAT, temp) sequentially; internal track/hold maintains signal integrity during multiplexing. Use Value: 0°C to +70°C rating and 2.7V minimum supply allow reliable operation under wide thermal and low-voltage conditions typical of solar harvesters. |
Use Scenario: Loop-powered industrial pressure transmitter converting 4–20mA output to digital for HART communication. IC Role / Device Role / Timing Role: Digitizes loop voltage drop across precision shunt resistor; REFOUT provides stable reference for ratiometric accuracy. Use Value: Internal 2.048V reference and ±0.3 LSB typical INL ensure <0.1% full-scale error over temperature - meeting Class A industrial requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 4-channel, SPI interface; 2.7V–5.25V supply; 1.25mW @ 50ksps vs. MAX1111CEE's 0.47mW | Requires external reference; no internal track/hold; higher power consumption limits battery life | Choose ADS7822U only if external reference flexibility outweighs power and integration trade-offs. |
| TLV2544IDW | 8-bit, 4-channel, SPI interface; 2.7V–5.5V supply; includes internal reference but no track/hold; 1.5µA standby vs. MAX1111CEE's 6µA | Lacks integrated track/hold; lower max sampling rate (200ksps vs. 50ksps) but higher resolution headroom | Prefer TLV2544IDW for cost-sensitive designs where external sample-hold is acceptable and lower standby current is critical. |
Compared with ADS7822U and TLV2544IDW, the MAX1111CEE uniquely integrates track/hold, reference, and low-power serial interface in a single 16-pin QSOP - reducing BOM count and PCB area while delivering best-in-class 6µA shutdown current for ultra-low-power sensing nodes.
Availability
MAX1111CEE is available at Aetrix Electronics and suitable for portable data logging, hand-held medical instruments, and solar-powered remote monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MAX1111CEE 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) designs precision analog and mixed-signal ICs for power, sensing, and connectivity in resource-constrained systems.
The MAX1110/MAX1111 family was engineered for ultra-low-power, multichannel data acquisition in battery-operated instrumentation - prioritizing integration, supply flexibility, and guaranteed monotonicity over raw speed.
FAQ
What is the operating temperature range for the MAX1111CEE?
The MAX1111CEE is rated for 0°C to +70°C operation, as confirmed in the ordering information row specifying "MAX1110CAP/MAX1111CEE...............................0°C to +70°C". This commercial-grade range aligns with portable and industrial indoor applications where ambient thermal stress is moderate. The device's internal reference exhibits ±0.8ppm/°C drift across this span, ensuring stable full-scale calibration without external compensation.
Does the MAX1111CEE include an internal track/hold circuit?
Yes, the MAX1111CEE integrates a track/hold (T/H) circuit with ≤1µs acquisition time, as documented in the General Description and Electrical Characteristics tables. This allows the device to accurately sample fast-changing analog signals without external components - critical for maintaining integrity during multiplexed channel switching in portable data loggers and medical devices.
Can the MAX1111CEE operate with a 3.3V supply?
Yes, the MAX1111CEE supports 2.7V to 5.5V single-supply operation, fully covering 3.3V systems. At 3.3V, it maintains 85µA supply current at 50ksps and retains ±1 LSB total unadjusted error. Its 5.5V-tolerant digital inputs (CS, SCLK, DIN) also simplify interface with 3.3V microcontrollers without level shifters.
How many analog input channels does the MAX1111CEE support?
The MAX1111CEE supports four analog input channels (CH0–CH3) configurable as either single-ended inputs referenced to COM or two pseudo-differential pairs (CH0/CH1 and CH2/CH3). This is explicitly stated in the Features section and confirmed in the Pin Description and Table 2a/2b - distinguishing it from the 8-channel MAX1110 and validating its role in compact, low-channel-count sensing applications.
What serial interface standards is the MAX1111CEE compatible with?
The MAX1111CEE supports SPI, QSPI, and MICROWIRE serial protocols, as stated in the General Description and Functional Diagram. It uses a 4-wire interface (CS, SCLK, DIN, DOUT) with MSB-first, falling-edge DOUT timing and CPOL=0/CPHA=0 configuration - enabling plug-and-play integration with standard microcontroller peripherals without custom firmware drivers.
MAX1111CEE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- 4-Wire, Microwire, QSPI, SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1111CEE FAQ
1.How can I place an order for MAX1111CEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1111CEE 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 MAX1111CEE reliable?
The price and inventory of MAX1111CEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1111CEE is usually 5 days.
3.What payment methods are accepted for MAX1111CEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1111CEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1111CEE?
MAX1111CEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1111CEE 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 MAX1111CEE?
For technical support, including MAX1111CEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1111CEE requirements.
6.How does Aetrix verify that MAX1111CEE is sourced from the original manufacturer or authorized distributors?
All MAX1111CEE 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 MAX1111CEE meets industry standards.
7.What is the process for return or replacement of MAX1111CEE?
All MAX1111CEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1111CEE, 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 MAX1111CEE part is unused and in its original packaging.
Return procedure for MAX1111CEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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