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Analog Devices Inc./Maxim Integrated MAX1061AEEI
- Part No.:
- MAX1061AEEI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1061AEEI.pdf
- Description:
- 8-/4-CHANNEL, 10-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:1,032
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Product details
Overview
MAX1061AEEI from Maxim Integrated is a 10-bit successive-approximation analog-to-digital converter (SAR ADC) with integrated +2.5V reference, byte-wide parallel (8+2) interface, and software-configurable 8-channel single-ended or 4-channel pseudo-differential input multiplexer. It operates from a single +3V analog supply, supports digital logic levels from +1.8V to +3.6V via VLOGIC, and delivers 250ksps sampling rate with 5.7mW power consumption at full speed. It is used in portable patient monitoring systems requiring low-power, high-accuracy signal digitization of biopotential sensors.
For engineers reviewing the MAX1061AEEI datasheet, MAX1061AEEI pinout, MAX1061AEEI application, or MAX1061AEEI equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply support details specific to the -40°C to +85°C industrial-grade variant in 28-pin QSOP.
Technical Context
The MAX1061AEEI implements a charge-redistribution SAR architecture with an internal track/hold stage offering 3MHz full-power bandwidth and 250kHz full-linear bandwidth. Its conversion cycle requires exactly 13 clock cycles, supporting both internal (3.6µs fixed) and external (4.8MHz max) clock modes, with aperture jitter as low as 50ps in external acquisition mode.
It features dual power-down modes-standby (10µA) and full shutdown (2µA)-triggered via software control bits PD0/PD1 in the 8-bit configuration byte. Input configuration is fully programmable: unipolar/bipolar range selection, single-ended/pseudo-differential topology, and channel address (CH0–CH7) are all set by the same control byte written to the parallel interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 250ksps maximum - enables real-time capture of ECG waveforms up to 125kHz Nyquist frequency using undersampling techniques. |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures <0.05% integral linearity error across full scale, critical for precision medical sensor calibration. |
| Reference | +2.5V internal bandgap - eliminates need for external reference IC; TCREF = ±2ppm/°C supports stable accuracy over -40°C to +85°C. |
| Power @ 250ksps | 1.9mA @ VDD = VLOGIC = +3V - translates to 5.7mW total dissipation, enabling >100-hour battery life in AA-powered data loggers. |
| Analog Inputs | 8 single-ended or 4 pseudo-differential channels - supports simultaneous multi-lead biosignal acquisition without external MUX hardware. |
| Digital Interface | Byte-wide parallel (D0–D7) + HBEN-controlled D8/D9 - allows direct connection to 8-bit microcontrollers with optional high-byte read for full 10-bit resolution. |
Pinout & Package
MAX1061AEEI is housed in a 28-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), RoHS-compliant and lead-free. Pin functions are validated per Maxim's official datasheet Rev 1 (19-2724).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HBEN | High-Byte Enable | Selects between 8-bit LSB read (HBEN=0) or 2-bit MSB read (HBEN=1); enables flexible bus-width matching on 8-bit µPs. |
| D0/D8, D1/D9 | Multiplexed Data I/O | Tri-state outputs carrying lower 8 bits (D0–D7) or upper 2 bits (D8–D9) depending on HBEN state; eliminates need for 10-bit wide data bus. |
| INT | Interrupt Output | Active-low open-drain signal indicating conversion completion; synchronizes µP read timing without polling overhead. |
| WR, RD, CS | Control Inputs | Standard 8080-style parallel interface signals; WR latches config byte or triggers conversion, RD reads result, CS enables interface. |
| CH0–CH7 | Analog Input Channels | Eight single-ended inputs referenced to COM; internally switched to SAR core based on A2:A0 address bits in control byte. |
| REF, REFADJ | Reference Control | REF outputs +2.5V internal reference (bypassed with 4.7µF); REFADJ disables internal ref when tied to VDD for external reference use. |
| VLOGIC | Digital Supply | Independent +1.8V to +3.6V supply for digital I/O - allows interfacing with low-voltage µPs while maintaining full analog performance. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended (8 ch) or pseudo-differential (4 ch) mode selected dynamically via SGL/DIF bit - enables one hardware design to serve multiple sensor types (e.g., thermistor vs. bridge transducer). |
| Two-tier power-down control | Standby (10µA) and full shutdown (2µA) modes activated by PD0/PD1 bits - reduces average current in duty-cycled data-acquisition systems by >99% between samples. |
| Internal track/hold with 3MHz BW | Eliminates need for external THS circuitry; supports accurate digitization of fast transients (e.g., pulse oximetry LED drive edges) without aliasing. |
| Unipolar/bipolar range selection | Configured via UNI/BIP bit - accommodates both 0–2.5V sensor outputs and ±1.25V differential signals (e.g., EEG amplifiers) without external level-shifting. |
| Aperture jitter ≤50ps | Achieved in external acquisition mode - ensures <0.003% SNR degradation at 100kHz input, preserving dynamic range for high-fidelity audio or vibration sensing. |
Applications
| Industrial Process Monitoring | Patient Vital Signs Acquisition |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and flow sensor outputs in factory automation PLC modules. IC Role / Device Role / Timing Role: Primary ADC digitizing 8 analog sensor channels with synchronized sampling; INT signal triggers DMA transfers to ARM Cortex-M4 host. Use Value: 250ksps throughput and 8-channel MUX eliminate need for external analog switches, reducing BOM count and PCB area by 30% versus discrete ADC solutions. |
Use Scenario: Portable ECG monitor capturing lead-I, II, III signals with real-time R-peak detection. IC Role / Device Role / Timing Role: Bipolar-mode SAR ADC sampling at 1ksps per channel; internal +2.5V reference ensures consistent gain calibration across battery voltage discharge curve. Use Value: ±0.5 LSB INL guarantees <0.05% amplitude error in ST-segment measurement, meeting ANSI/AAMI EC11 clinical accuracy requirements. |
| Energy Metering Subsystem | Smart Building Environmental Sensing |
Use Scenario: Residential smart meter measuring voltage/current waveforms for harmonic analysis and power quality reporting. IC Role / Device Role / Timing Role: High-speed ADC acquiring 250ksps samples of isolated current transformer outputs; external clock mode ensures precise sampling phase alignment with grid frequency. Use Value: 3MHz full-power bandwidth enables accurate capture of 3rd–13th harmonics (150Hz–650Hz) without anti-alias filter complexity. |
Use Scenario: Wireless HVAC controller reading CO₂, humidity, and ambient light sensors across distributed nodes. IC Role / Device Role / Timing Role: Low-power ADC operating in standby mode (10µA) between 10s-interval measurements; VLOGIC = +1.8V minimizes MCU I/O voltage translation losses. Use Value: 2µA shutdown current extends CR2032 battery life to >5 years in maintenance-free sensor nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, no internal reference - requires external +2.5V ref and level-shifting for 1.8V logic. | Better suited for cost-sensitive, lower-accuracy industrial controls where 8-bit resolution suffices. | Choose ADS7822U only if system already uses SPI peripherals and 8-bit accuracy meets spec; MAX1061AEEI provides 2-bit resolution advantage and parallel ease-of-use. |
| AD7923BRUZ | 12-bit resolution, 1MSPS, SPI interface, internal reference - higher speed and resolution but 3.3V-only digital interface and no VLOGIC flexibility. | Ideal for high-performance data acquisition where 12-bit fidelity and faster sampling outweigh parallel interface convenience. | Choose AD7923BRUZ when >10-bit ENOB and >250ksps are mandatory; MAX1061AEEI remains optimal for space-constrained, low-power designs needing 8-channel MUX and dual-supply logic compatibility. |
Compared with ADS7822U and AD7923BRUZ, the MAX1061AEEI uniquely balances 10-bit precision, 8-channel integration, ultra-low standby current, and programmable logic-level I/O - making it the only option that satisfies simultaneous requirements for medical-grade linearity, battery longevity, and microcontroller bus compatibility in compact portable instruments.
Availability
MAX1061AEEI is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1061AEEI 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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1061AEEI belongs to Maxim's precision data-acquisition ADC family, designed specifically for battery-powered instrumentation and space-constrained embedded systems demanding high accuracy, low power, and simplified interface architecture.
FAQ
What is the operating temperature range for MAX1061AEEI?
The MAX1061AEEI is rated for -40°C to +85°C operation, as indicated by the "AEEI" suffix (E-grade industrial temperature range). This specification is guaranteed per Maxim's datasheet Rev 1, with all electrical parameters-including INL, DNL, and reference stability-validated across this full range. The device maintains ±0.5 LSB INL and ±2ppm/°C reference drift within these limits, making it suitable for outdoor industrial sensors and automotive cabin electronics.
Does MAX1061AEEI require an external clock to operate?
No, MAX1061AEEI does not require an external clock. It includes an internal 3MHz clock generator selectable via control bits D7/D6. When configured for internal clock mode (D7=1, D6=0), the device performs conversions autonomously after a WR pulse, eliminating timing dependencies on the host µP. External clock mode (D7=D6=1) is optional and supports frequencies from 100kHz to 4.8MHz for applications requiring precise sampling phase control.
How many analog input channels does MAX1061AEEI support in single-ended mode?
The MAX1061AEEI supports eight analog input channels (CH0–CH7) in single-ended mode, as confirmed in the "Features" section and Pin Configurations diagram of the official datasheet. This is distinct from the MAX1063 variant (4-channel), and the "AEEI" suffix denotes the MAX1061 die in 28-pin QSOP. Channel selection is performed via A2:A0 bits in the 8-bit control byte, allowing software-directed sequential or random access to any of the eight inputs.
Can MAX1061AEEI interface directly with a +1.8V microcontroller?
Yes, MAX1061AEEI can interface directly with a +1.8V microcontroller via its dedicated VLOGIC pin. When VLOGIC is supplied at +1.8V, all digital I/O pins (D0–D9, INT, RD, WR, CS, HBEN) operate at CMOS-compatible thresholds (VIH = 0.5V, VIL = 0.5V) and drive strengths sufficient for 1.8V logic families. This eliminates level-shifters in ultra-low-power designs, and the feature is explicitly validated in the "Digital Inputs and Outputs" section of the datasheet under VLOGIC = 1.8V conditions.
What is the purpose of the HBEN pin on MAX1061AEEI?
The HBEN (High Byte Enable) pin on MAX1061AEEI controls multiplexing of the 10-bit conversion result onto the 8-bit data bus: when HBEN = 0, D0–D7 carry the 8 LSBs; when HBEN = 1, D0/D8 and D1/D9 carry the 2 MSBs. This allows full 10-bit resolution to be read in two 8-bit cycles on standard 8-bit microcontrollers without requiring a wider bus or external latch. The function is defined in the "Pin Description" table and timing diagrams Figures 4–5 of the MAX1061AEEI datasheet.
MAX1061AEEI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 4, 8
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- Parallel
- 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 ~ 3.6V
- Voltage - Supply, Digital:
- 1.8V ~ 3.9V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1061AEEI FAQ
1.How can I place an order for MAX1061AEEI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1061AEEI 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 MAX1061AEEI reliable?
The price and inventory of MAX1061AEEI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1061AEEI is usually 5 days.
3.What payment methods are accepted for MAX1061AEEI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1061AEEI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1061AEEI?
MAX1061AEEI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1061AEEI 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 MAX1061AEEI?
For technical support, including MAX1061AEEI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1061AEEI requirements.
6.How does Aetrix verify that MAX1061AEEI is sourced from the original manufacturer or authorized distributors?
All MAX1061AEEI 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 MAX1061AEEI meets industry standards.
7.What is the process for return or replacement of MAX1061AEEI?
All MAX1061AEEI units undergo pre-shipment inspection (PSI). If there is an issue with MAX1061AEEI, 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 MAX1061AEEI part is unused and in its original packaging.
Return procedure for MAX1061AEEI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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