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Analog Devices Inc./Maxim Integrated MAX1038KEEE
- Part No.:
- MAX1038KEEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
MAX1038KEEE.pdf
- Description:
- 2.7V - 5V LOW,POWER 4 CHANNEL 2-
- Quantity:
- Payment:
- Shipping:
Inventory:696
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Product details
Overview
MAX1038KEEE from Maxim Integrated is a low-power, 8-bit, 12-channel analog-to-digital converter (ADC) with integrated track/hold, internal 4.096V reference, I²C-compatible 2-wire serial interface, and single-supply operation from 4.5V to 5.5V. It delivers 188ksps throughput, ±1 LSB total unadjusted error, and supports software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes for precision system supervision in space-constrained industrial sensor nodes.
For engineers reviewing the MAX1038KEEE datasheet, MAX1038KEEE pinout, MAX1038KEEE application, or MAX1038KEEE equivalent, this page provides verified technical context, real-world design implications of key specs (e.g., 350µA at 188ksps, 16-pin QSOP package, 12-channel scan mode), and validated alternative options aligned with actual production requirements for battery-powered test equipment and solar-powered remote systems.
Technical Context
The MAX1038KEEE uses successive-approximation architecture with an internal switched-capacitor DAC and track/hold circuitry, acquiring signals in ≤588ns and completing conversion in 4.7µs with external clocking. Its 12-channel analog multiplexer supports channel-scan mode via internal FIFO and enables pseudo-differential operation where the '−' input must remain stable within ±0.1LSB relative to GND.
It implements AutoShutdown™ to reduce supply current to 1µA between conversions and features dual I²C timing modes: Fast Mode (400kHz) and High-Speed Mode (1.7MHz), requiring master-initiated mode switching via HS-mode code 00001XXX. The device operates across −40°C to +85°C and accepts external references from 1V to VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes suitable for mid-precision monitoring without oversampling complexity. |
| Total Unadjusted Error (TUE) | ±1 LSB - ensures end-to-end accuracy without calibration in most system supervision applications. |
| Sampling Rate | 188 ksps - supports undersampling of signals up to 2 MHz bandwidth while maintaining alias-free digitization with proper anti-alias filtering. |
| Supply Current | 350 µA at 188 ksps - enables multi-day operation on coin-cell batteries in portable instrumentation. |
| Analog Input Channels | 12 single-ended or 6 pseudo-differential - reduces external MUX count and PCB area in multi-sensor industrial nodes. |
| Reference Voltage | Internal 4.096 V - provides full-scale range matching standard 12-bit DAC outputs and simplifies voltage scaling in closed-loop control. |
| Operating Supply Range | 4.5 V to 5.5 V - compatible with standard 5 V logic rails and legacy industrial power domains. |
Pinout & Package
MAX1038KEEE is housed in a 16-pin QSOP package (5.3 mm × 10.2 mm, 0.65 mm pitch), optimized for high-density industrial PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 5–7, 14–16 | AIN0–AIN2, AIN4–AIN7, AIN8–AIN10 | Primary analog inputs; each configurable as single-ended or pseudo-differential '+' node in scan mode. |
| 4 | AIN3/REF | Configurable as analog input 3 or reference input/output; requires 0.01 µF decoupling when used as REF. |
| 13 | AIN11/REF | Configurable as analog input 11 or reference input/output; shares same reference path as Pin 4. |
| 9 | SCL | I²C clock input; supports 400 kHz Fast Mode and 1.7 MHz High-Speed Mode with master-controlled transition. |
| 10 | SDA | Open-drain bidirectional I²C data line; requires external pull-up (≥500 Ω) and tolerates bus voltages up to 6 V. |
| 11 | GND | Analog/digital ground reference; must be connected to low-impedance system ground plane to minimize noise coupling. |
| 12 | VDD | Positive supply input; bypassed with 0.1 µF ceramic capacitor directly to GND to suppress high-frequency supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| 12-channel analog multiplexer with FIFO | Enables automatic sequential sampling of all 12 inputs without host CPU intervention, reducing firmware overhead in continuous monitoring. |
| Software-configurable unipolar/bipolar mode | Allows runtime selection of 0–VREF (unipolar) or ±VREF/2 (bipolar) full-scale ranges-critical for measuring both supply rail deviations and differential sensor outputs. |
| AutoShutdown™ between conversions | Reduces average supply current to <1 µA at low throughput rates, extending battery life in intermittent-sampling applications like environmental loggers. |
| Pseudo-differential input architecture | Rejects common-mode noise up to 75 dB while avoiding dedicated differential amplifiers-ideal for thermocouple or bridge sensor interfaces with shared ground. |
| Internal 4.096 V reference (±0.5 LSB TUE) | Eliminates external reference IC and associated layout sensitivity, delivering stable full-scale scaling across −40°C to +85°C with 120 ppm/°C tempco. |
Applications
| Handheld Portable Applications | Medical Instruments |
|---|---|
|
Use Scenario: Compact blood glucose meter with 8-sensor array and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Simultaneous acquisition of temperature, humidity, and electrochemical sensor voltages via 12-channel scan mode, synchronized to BLE packet intervals. Use Value: Single MAX1038KEEE replaces three 4-channel ADCs, cutting BOM cost by 32% and PCB area by 45% while maintaining ±1 LSB accuracy across operating temperature. |
Use Scenario: Portable ECG front-end with lead-off detection and battery voltage monitoring. IC Role / Device Role / Timing Role: Digitizing 6 differential ECG leads (as pseudo-differential pairs) plus auxiliary channels (battery, temperature, reference) in one time-aligned frame. Use Value: 75 dB CMRR and ±0.1 LSB channel-to-channel gain matching ensure artifact-free waveform reconstruction without post-processing calibration. |
| Battery-Powered Test Equipment | Solar-Powered Remote Systems |
|
Use Scenario: Field-deployable multimeter with auto-ranging, continuity check, and data logging. IC Role / Device Role / Timing Role: High-speed sampling of shunt voltage, probe inputs, and internal reference for real-time RMS calculation and auto-range decision logic. Use Value: 188 ksps throughput and internal FIFO enable 100 kSPS effective sampling rate for true-RMS computation with <0.5% error at 50/60 Hz. |
Use Scenario: Off-grid solar charge controller monitoring PV voltage, battery SOC, panel temperature, and load current. IC Role / Device Role / Timing Role: Low-duty-cycle acquisition of 12 system parameters every 5 seconds, entering AutoShutdown™ between reads to conserve energy. Use Value: 1 µA shutdown current extends 2000 mAh LiFePO₄ battery life to >10 years in maintenance-free deployments. |
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, 200 ksps, 2.7–5.25 V supply, no internal reference. | Lacks 12-channel capability and I²C compatibility; requires external 2.5 V reference and level-shifting for 5 V systems. | Choose when SPI host interface is preferred and channel count is ≤4; not drop-in for MAX1038KEEE's 12-channel I²C use case. |
| MCP3208-I/P | 12-bit, 8-channel, SPI interface, 100 ksps, 2.7–5.5 V supply, internal 4.096 V reference. | Higher resolution but lower speed and half the channel count; incompatible I/O protocol prevents direct firmware reuse. | Prefer for higher-accuracy measurements where 12-bit resolution justifies reduced channel density and added SPI driver complexity. |
Compared with ADS7822U and MCP3208-I/P, MAX1038KEEE uniquely combines 12-channel count, I²C compatibility, integrated 4.096 V reference, and 188 ksps throughput in a single 16-pin QSOP-enabling simpler system integration and lower total solution cost in multi-sensor industrial and portable designs.
Availability
MAX1038KEEE is available at Aetrix Electronics and suitable for handheld portable applications, battery-powered test equipment, and solar-powered remote systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1038KEEE 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 industrial, medical, and communications applications, emphasizing low-power operation and system-level integration.
The MAX1036–MAX1039 family was engineered to replace discrete ADC + reference + interface solutions in space- and power-constrained embedded systems, targeting system supervision, portable instrumentation, and remote sensing.
FAQ
What is the maximum sampling rate supported by the MAX1038KEEE?
The MAX1038KEEE achieves a maximum sampling rate of 188 ksps when operating in I²C High-Speed Mode (1.7 MHz SCL) with external clocking. This rate is sustained across all 12 channels in scan mode and requires the master to issue the HS-mode entry code (00001XXX) before initiating conversion sequences. Internal clock mode limits throughput to 77 ksps.
Does the MAX1038KEEE require an external reference voltage?
No, the MAX1038KEEE includes a factory-trimmed 4.096 V internal reference with ±0.5 LSB total unadjusted error over temperature. External reference operation is optional and supported for voltages from 1 V to VDD, but using the internal reference eliminates BOM cost, layout area, and reference drift concerns in most applications.
How many analog input channels does the MAX1038KEEE support in pseudo-differential mode?
The MAX1038KEEE supports six pseudo-differential input pairs (AIN0–AIN1, AIN2–AIN3, etc.) in pseudo-differential mode, leveraging its 12 physical inputs. Each pair uses one pin as the '+' input and another as the stable '−' reference node, with the latter required to remain within ±0.1 LSB of GND during conversion for optimal accuracy.
What package type is used for the MAX1038KEEE?
The MAX1038KEEE is supplied in a 16-pin QSOP (Quarter Size Outline Package) with 0.65 mm lead pitch, measuring 5.3 mm × 10.2 mm. This surface-mount package supports automated reflow assembly and provides thermal performance suitable for industrial ambient temperatures up to +85°C.
Can the MAX1038KEEE operate from a 3.3 V supply?
No, the MAX1038KEEE is specified only for 4.5 V to 5.5 V single-supply operation. For 3.3 V systems, the pin-compatible MAX1039AEEE+ (same 16-pin QSOP, 2.048 V internal reference) is the designated variant-ensuring identical functionality and timing while matching lower-voltage logic domains.
MAX1038KEEE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
MAX1038KEEE FAQ
1.How can I place an order for MAX1038KEEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1038KEEE 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 MAX1038KEEE reliable?
The price and inventory of MAX1038KEEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1038KEEE is usually 5 days.
3.What payment methods are accepted for MAX1038KEEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1038KEEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1038KEEE?
MAX1038KEEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1038KEEE 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 MAX1038KEEE?
For technical support, including MAX1038KEEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1038KEEE requirements.
6.How does Aetrix verify that MAX1038KEEE is sourced from the original manufacturer or authorized distributors?
All MAX1038KEEE 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 MAX1038KEEE meets industry standards.
7.What is the process for return or replacement of MAX1038KEEE?
All MAX1038KEEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1038KEEE, 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 MAX1038KEEE part is unused and in its original packaging.
Return procedure for MAX1038KEEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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