My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX11646EUA+
- Part No.:
- MAX11646EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX11646EUA+.pdf
- Description:
- IC ADC 10BIT SAR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:571
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX11646EUA+ from Maxim Integrated is a low-power, 10-bit, 2-channel I²C-compatible analog-to-digital converter with internal track/hold, 4.096V reference, and 8-pin µMAX package. It operates from 4.5V to 5.5V, draws only 6µA at 1ksps, and supports software-configurable single-ended or differential inputs for precision sensing in space-constrained systems.
For engineers reviewing the MAX11646EUA+ datasheet, MAX11646EUA+ pinout, MAX11646EUA+ application, or MAX11646EUA+ equivalent, this page delivers verified electrical parameters, I²C timing modes (400kHz Fast / 1.7MHz High-Speed), unipolar/bipolar input configuration, FIFO-based channel-scan operation, and supply-current vs. throughput trade-offs - all critical for battery-powered instrumentation and system supervision designs.
Technical Context
The MAX11646EUA+ uses successive-approximation architecture with fully differential track/hold circuitry and a switched-capacitor DAC. Its analog front-end supports two single-ended or one differential input pair, with input range selectable via internal 4.096V reference or external 1V–VDD reference.
It implements AutoShutdown™ to reduce current to <0.5µA between conversions and features an internal oscillator or external clock interface. The I²C slave address is fixed at 0110110 (7-bit), supporting both Fast Mode (400kHz) and High-Speed Mode (1.7MHz) with distinct timing requirements for SCL/SDA setup/hold and rise/fall times.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes for moderate-precision measurement without oversampling complexity. |
| Supply Voltage Range | 4.5V to 5.5V - compatible with standard 5V logic and industrial power rails; not interoperable with 3.3V-only systems. |
| Internal Reference | 4.096V ±2.5% - enables full-scale input range of 0–4.096V (unipolar) or ±2.048V (bipolar); eliminates need for external reference in many applications. |
| Sampling Rate | Up to 94.4ksps (external clock, HS mode) - sufficient for monitoring fast transients in power-supply supervision or RSSI circuits. |
| Supply Current | 6µA at 1ksps, 670µA at 94.4ksps - ultra-low quiescent power enables multi-year battery life in portable medical or remote solar systems. |
| I²C Interface Speed | 1.7MHz High-Speed Mode - reduces data transfer time per conversion by >4× vs. standard 400kHz mode, improving real-time responsiveness. |
| INL / DNL | ±1 LSB integral and differential nonlinearity - ensures monotonicity and predictable code transitions across temperature (−40°C to +85°C). |
Pinout & Package
MAX11646EUA+ is housed in an 8-pin µMAX® package (3.0mm × 3.0mm, 0.8mm height), RoHS-compliant and lead(Pb)-free. Pinout is validated per Maxim's official datasheet (Rev 1, 9/10).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | AIN0, AIN1 | Analog input channels - configurable as two single-ended or one fully differential pair; input protection clamps to GND/VDD ±0.3V. |
| 3 | N.C. | No connection - internally unconnected; must be left floating or tied to GND per layout best practice. |
| 4 | REF | Reference input/output - supplies or accepts 1V–VDD reference; when using internal 4.096V ref, requires 0.1µF decoupling to GND via 2kΩ series resistor. |
| 5 | SCL | I²C clock input - controls data timing; supports Fast Mode (400kHz) and High-Speed Mode (1.7MHz) with defined tHIGH/tLOW/tSU/tHD. |
| 6 | SDA | I²C bidirectional data line - open-drain; requires external pull-up (≥750Ω); handles setup/acknowledge/stop signaling per I²C protocol. |
| 7 | GND | Analog/digital ground - common return for VDD, REF, and analog inputs; must be low-impedance and separated from noisy digital planes. |
| 8 | VDD | Positive supply - bypassed to GND with 0.1µF ceramic capacitor; powers internal oscillator, T/H, ADC core, and I²C interface. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <0.5µA during idle intervals - extends battery life in intermittent-sampling applications like handheld test equipment. |
| Software-configurable input mode | Single-ended/differential and unipolar/bipolar selection via setup byte - enables flexible signal conditioning without hardware changes. |
| Internal FIFO with channel-scan mode | Automatically sequences conversions across AIN0/AIN1 - simplifies firmware for dual-sensor monitoring (e.g., voltage + temperature). |
| Low source-impedance tolerance | Accurate sampling with analog sources up to 1.5kΩ - avoids mandatory op-amp buffering in medium-impedance sensor interfaces. |
| 5MHz small-signal analog bandwidth | Supports undersampling of high-frequency signals (e.g., RF envelope detection) while maintaining DC accuracy for system supervision. |
Applications
| Battery-Powered Test Equipment | Power-Supply Monitoring |
|---|---|
Use Scenario: Portable multimeter or handheld calibration tool measuring DC voltage/current with minimal size and power budget. IC Role / Device Role / Timing Role: ADC digitizes sensor outputs under microcontroller control via I²C; AutoShutdown conserves energy between measurements. Use Value: 6µA standby current and 8-pin µMAX footprint enable compact, multi-year battery operation without sacrificing 10-bit resolution. |
Use Scenario: Real-time tracking of 3.3V/5V/12V rail voltages in embedded computing or telecom power modules. IC Role / Device Role / Timing Role: Measures multiple rails sequentially using channel-scan mode; internal 4.096V reference ensures stable full-scale range. Use Value: ±1 LSB INL and 670µA active current at 94.4ksps support accurate, low-overhead supervision without external reference or buffer. |
| Solar-Powered Remote Systems | Medical Instruments |
Use Scenario: Environmental sensor node in off-grid solar installation logging battery voltage, panel current, and temperature. IC Role / Device Role / Timing Role: Digitizes analog outputs from shunt resistors and thermistors; I²C interface minimizes MCU GPIO usage. Use Value: 4.5V–5.5V supply range matches nominal LiFePO₄ or 5V solar regulator output; −40°C to +85°C rating ensures outdoor reliability. |
Use Scenario: Portable ECG or pulse oximeter requiring low-noise, low-power analog acquisition near patient. IC Role / Device Role / Timing Role: Converts differential biopotential signals with software-selectable bipolar mode and internal reference. Use Value: Fully differential T/H and 5MHz input bandwidth preserve signal integrity; 0.5µA shutdown current extends disposable device shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11644EUA+ | 12-bit resolution, same 8-pin µMAX package and I²C interface; 4.096V internal reference; higher supply current (1.2mA at 94.4ksps). | Required where higher resolution outweighs power penalty - e.g., precision industrial sensors with ample power budget. | Select MAX11644EUA+ only if 12-bit quantization is essential; verify PCB thermal design accommodates higher IDD. |
| ADS7822U | 12-bit, SPI interface (not I²C), 2.7V–5.25V supply, no internal reference - requires external 2.5V ref and level-shifting for 5V systems. | Suitable for SPI-based microcontrollers where bus compatibility and external reference flexibility are prioritized over I²C simplicity. | Choose ADS7822U when migrating from legacy SPI designs; avoid if I²C bus sharing or minimal BOM count is critical. |
Compared with MAX11646EUA+, MAX11644EUA+ offers higher resolution at increased power cost, while ADS7822U trades I²C convenience for SPI flexibility and external reference dependency - making MAX11646EUA+ optimal for space- and power-constrained 5V I²C systems needing proven 10-bit performance.
Availability
MAX11646EUA+ is available at Aetrix Electronics and suitable for battery-powered test equipment, power-supply monitoring, and solar-powered remote systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX11646EUA+ 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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX11646EUA+ belongs to Maxim's ultra-low-power, I²C ADC product line - engineered specifically for compact, battery-operated instrumentation where integration, supply efficiency, and guaranteed −40°C to +85°C operation are mandatory.
FAQ
What is the maximum sampling rate supported by MAX11646EUA+?
The MAX11646EUA+ achieves up to 94.4ksps when operating in I²C High-Speed Mode (1.7MHz SCL) with external clocking. In Fast Mode (400kHz), the practical limit drops to ~22.2ksps. This rate assumes use of the internal 4.096V reference and single-ended unipolar input configuration - actual throughput depends on I²C bus arbitration and host controller overhead. MAX11646EUA+ does not support continuous streaming beyond these limits without firmware-managed gaps.
Does MAX11646EUA+ require an external reference voltage?
No, MAX11646EUA+ includes a factory-trimmed 4.096V internal reference usable across the full −40°C to +85°C range. External reference is optional and supported for 1V to VDD (5.5V); however, using the internal reference simplifies BOM and layout. When enabled, REF pin must be decoupled with a 0.1µF capacitor and 2kΩ series resistor to GND. MAX11646EUA+ performance specifications assume internal reference unless otherwise stated.
How does the AutoShutdown™ feature work in MAX11646EUA+?
AutoShutdown™ automatically powers down the MAX11646EUA+ analog core and reference between conversions, reducing supply current to <0.5µA in deep sleep. It activates after each conversion completes and remains active until the next I²C read command initiates acquisition. This behavior is inherent to the device architecture - no register write is needed. MAX11646EUA+ exits AutoShutdown on SDA/SCL activity, making it transparent to standard I²C polling or interrupt-driven firmware.
Can MAX11646EUA+ measure differential signals?
Yes, MAX11646EUA+ supports fully differential input mode via the SGL/DIF bit in its configuration byte. In differential mode, it measures the voltage difference between AIN0 (+) and AIN1 (−), with full-scale range of ±2.048V (bipolar) or 0–4.096V (unipolar). The input multiplexer, track/hold, and ADC core are designed for true differential operation - including common-mode rejection and matched input paths - confirmed in the device's electrical characteristics table (channel-to-channel offset matching ±0.1 LSB).
What is the I²C slave address of MAX11646EUA+?
The MAX11646EUA+ has a fixed 7-bit I²C slave address of 0110110 (0x36 in hexadecimal), as specified in the Ordering Information table and verified in Figure 7 of the datasheet. The R/W bit (LSB) determines direction: 0 for write (setup/configuration), 1 for read (data acquisition). No address pins or hardware strapping options exist - all MAX11646/MAX11647 variants share this address, requiring bus arbitration in multi-device systems.
MAX11646EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 94.4k
- Number of Inputs:
- 1, 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11646EUA+ FAQ
1.How can I place an order for MAX11646EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11646EUA+ 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 MAX11646EUA+ reliable?
The price and inventory of MAX11646EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11646EUA+ is usually 5 days.
3.What payment methods are accepted for MAX11646EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11646EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11646EUA+?
MAX11646EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11646EUA+ 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 MAX11646EUA+?
For technical support, including MAX11646EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11646EUA+ requirements.
6.How does Aetrix verify that MAX11646EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX11646EUA+ 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 MAX11646EUA+ meets industry standards.
7.What is the process for return or replacement of MAX11646EUA+?
All MAX11646EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11646EUA+, 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 MAX11646EUA+ part is unused and in its original packaging.
Return procedure for MAX11646EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX11646EUA+ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
