My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1246AEEE
- Part No.:
- MAX1246AEEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1246AEEE.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1246AEEE from Maxim Integrated is a 12-bit, 4-channel serial analog-to-digital converter (ADC) with integrated track/hold, software-configurable unipolar/bipolar and single-ended/differential inputs, internal 2.5V reference, and SPI/QSPI/MICROWIRE-compatible 4-wire interface. It operates from a single +2.7V to +3.6V supply, consumes 1.2mA at 133ksps, and supports shutdown current as low as 1µA - ideal for portable data loggers and battery-powered medical instruments.
For engineers reviewing the MAX1246AEEE datasheet, MAX1246AEEE pinout, MAX1246AEEE application, or MAX1246AEEE equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated QSOP-16 pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to this temperature-grade variant.
Technical Context
The MAX1246AEEE uses successive-approximation register (SAR) architecture with an internal track/hold circuit that acquires input signals in ≤1.5µs and supports both internal clock (up to 7.5MHz) and external serial clock (up to 2MHz) conversion modes. Its analog front-end allows software-selectable input configurations: 4 single-ended or 2 pseudo-differential channels referenced to COM.
It integrates a buffered 2.5V internal reference (±1.5% adjustability via REFADJ), reference-buffer amplifier with internal/external compensation modes controlled by SHDN logic level, and a 3-state serial interface with SSTRB strobe output compatible with TMS320-family DSPs. Conversion results are output MSB-first on DOUT at SCLK falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 quantization step; enables ±0.5 LSB INL accuracy in A-grade devices. |
| Sampling Rate | 133ksps max (external 2MHz clock) - supports real-time acquisition of audio-band and sensor signals without undersampling artifacts. |
| Supply Range | +2.7V to +3.6V - compatible with Li-ion battery discharge profile and 3.3V system rails without LDO overhead. |
| Reference | Internal 2.500V ±0.5% (TA = +25°C), ±30ppm/°C TC - eliminates need for external precision reference in space-constrained designs. |
| Power Consumption | 1.2mA active (133ksps), 54µA at 1ksps, 1µA shutdown - enables >1-year battery life in intermittent-sampling applications. |
| INL / DNL | ±0.5 LSB / ±0.8 LSB (max) - ensures monotonicity and <0.012% full-scale linearity error for precision transducer interfacing. |
| Input Configuration | Software-selectable unipolar (0V to VREF) or bipolar (±VREF/2), single-ended or pseudo-differential - reduces BOM count across multiple sensor types. |
Pinout & Package
MAX1246AEEE is housed in a 16-pin QSOP package (5.3mm × 10.2mm footprint, same board area as 8-pin SO), optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +2.7V to +3.6V; powers analog and digital sections; requires local 0.1µF bypass to AGND/DGND. |
| CH0–CH3 (Pins 2–5) | Analog input channels | Four single-ended or two differential (CH0/CH1, CH2/CH3) inputs; each protected by ±0.3V clamping diodes to VDD/AGND. |
| COM (Pin 6) | Analog ground reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5 LSB; separate from AGND/DGND planes. |
| SHDN (Pin 7) | Three-level shutdown control | Low = full power-down; high = internal compensation; float = external compensation (4.7µF at VREF required). |
| REFADJ (Pin 9) | Reference buffer adjustment | ±1.5% VREF tuning port; tie to VDD to disable internal reference buffer when using external VREF. |
| VREF (Pin 8) | Reference output/input | 2.500V nominal output (MAX1246 only); accepts external 1.0V–(VDD+50mV) reference when buffer disabled. |
| SCLK (Pin 16) | Serial clock input | Drives data I/O and (in external mode) SAR conversion; 40–60% duty cycle required; max 2MHz frequency. |
| CS (Pin 15) | Chip select (active-low) | Enables serial interface; DOUT and SSTRB enter high-Z when CS = high; supports multi-device daisy-chaining. |
| DIN (Pin 14) | Serial data input | Accepts 8-bit control byte (START, SEL2–SEL0, UNI/BIP, SGL/DIF, PD1, PD0) on SCLK rising edge. |
| DOUT (Pin 12) | Serial data output | Outputs 12-bit result MSB-first on SCLK falling edge; high-Z when CS = high; compatible with SPI/QSPI timing. |
| SSTRB (Pin 13) | Serial strobe output | Pulses high before MSB decision (external mode) or asserts low during conversion (internal mode); syncs DSP capture timing. |
| AGND (Pin 10) | Analog ground | Return path for analog circuitry; must be isolated from DGND except at single-point star ground near VDD decoupling. |
| DGND (Pin 11) | Digital ground | Return path for digital I/O; connects to µP ground plane; separated from AGND to minimize noise coupling into ADC core. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | +2.7V to +3.6V range eliminates dual-rail supplies and simplifies power architecture in portable systems. |
| Internal 2.5V reference | Reduces component count and layout area vs. external reference ICs; ±30ppm/°C drift supports industrial temperature operation. |
| 4-wire SPI/QSPI/MICROWIRE interface | Direct connection to common microcontrollers without level shifters or glue logic; supports 0–2MHz clock rates. |
| Software-configurable input modes | Runtime selection of unipolar/bipolar and single-ended/differential via control byte - enables one firmware image across sensor variants. |
| Low-power shutdown | 1µA shutdown current and automatic power-up on CS assertion enable energy harvesting and wake-on-event architectures. |
| QSOP-16 package | Same PCB footprint as 8-pin SO - allows drop-in upgrade from lower-channel ADCs without layout revision. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over weeks. IC Role / Device Role / Timing Role: Primary ADC digitizing four analog sensor outputs with programmable gain and bipolar offset handling. Use Value: Internal reference and 1µA shutdown extend battery life beyond 12 months; QSOP-16 saves board space vs. DIP alternatives. |
Use Scenario: Handheld ECG monitor acquiring lead I, II, III signals with baseline wander correction. IC Role / Device Role / Timing Role: Simultaneous sampling of differential biopotential channels with COM-referenced common-mode rejection. Use Value: Pseudo-differential mode and ±0.5 LSB INL ensure diagnostic-grade waveform fidelity at 133ksps sampling rate. |
| Pen Digitizers | Battery-Powered Test Equipment |
Use Scenario: Active stylus interface detecting X/Y position and pressure via resistive touch overlay. IC Role / Device Role / Timing Role: High-speed acquisition of four analog channel pairs (X+, X−, Y+, Y−) with sub-microsecond acquisition time. Use Value: 1.5µs track/hold acquisition and 2.25MHz small-signal bandwidth resolve rapid pen movement without aliasing. |
Use Scenario: Field-deployable multimeter measuring DC voltage, AC RMS, and resistance with auto-ranging. IC Role / Device Role / Timing Role: Precision front-end ADC supporting 12-bit resolution across ±200mV to ±20V input ranges via external scaling. Use Value: Software-selectable unipolar/bipolar and single-ended/differential modes reduce calibration complexity across measurement functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1247AEEE | Wider supply range (+2.7V to +5.25V); requires external reference; no internal VREF. | Preferred where system already provides precision 2.5V reference or operates from 5V rail. | Select MAX1247AEEE if external reference improves overall system accuracy or simplifies thermal drift budget. |
| ADS7822U | TI 12-bit SAR ADC; 200ksps; +2.7V to +5.25V supply; SPI interface; no internal reference; different pinout. | Used in industrial PLC modules requiring higher sampling rate and 5V compatibility. | Choose ADS7822U only when higher throughput or TI ecosystem alignment outweighs MAX1246AEEE's integrated reference advantage. |
Compared with MAX1247AEEE, MAX1246AEEE reduces BOM cost and layout area by integrating the reference, while ADS7822U trades reference integration for higher speed and broader supply flexibility - making MAX1246AEEE optimal for compact, battery-sensitive designs where 133ksps suffices.
Availability
MAX1246AEEE is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered test equipment requiring stable component supply across extended production lifecycles.
Supply support for MAX1246AEEE 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, medical, and consumer applications.
The MAX1246/MAX1247 family was designed for ultra-low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing integrated references, flexible input configurations, and minimal external components.
FAQ
What is the operating temperature range of the MAX1246AEEE?
The MAX1246AEEE is rated for 0°C to +70°C ambient operation, as indicated by the "A" grade suffix in its ordering code. This commercial-grade specification ensures reliable performance in handheld instruments, portable sensors, and non-extreme-environment embedded systems. The device maintains ±0.5 LSB INL and 1.2mA supply current within this range, with reference drift limited to ±30ppm/°C.
Does the MAX1246AEEE require external passive components for stable operation?
Yes - the MAX1246AEEE requires a 4.7µF capacitor between VREF and AGND (for internal reference mode), a 0.047µF capacitor between REFADJ and AGND, and a 0.1µF ceramic capacitor between VDD and AGND/DGND. These components stabilize the reference buffer, suppress switching noise, and ensure accurate 12-bit conversions; omission causes increased INL and reference droop.
How does the SHDN pin function in the MAX1246AEEE?
The SHDN pin on the MAX1246AEEE provides three distinct operating states: pulled low → full power-down (1µA ICC); pulled high → internal compensation mode (reference buffer enabled with internal cap); left floating → external compensation mode (requires 4.7µF at VREF). This triple-state control eliminates need for external logic to manage reference stability during sleep/wake cycles.
Can the MAX1246AEEE interface directly with a TMS320C54x DSP?
Yes - the MAX1246AEEE's SSTRB output is explicitly designed for direct connection to TMS320-family DSPs. In internal clock mode, SSTRB asserts low at conversion start and high at completion, enabling hardware-triggered DMA transfers. The 4-wire serial interface matches C54x McBSP timing when configured for CPOL = 0 and CPHA = 0, requiring no additional interface logic.
What is the maximum source impedance supported for analog inputs on the MAX1246AEEE?
The MAX1246AEEE supports analog source impedances up to 1kΩ without degrading AC performance. For higher impedances, a 0.01µF capacitor must be placed at each input to limit RC filtering effects; acquisition time increases per tACQ = 9 × (RS + 9kΩ) × 16pF, with minimum 1.5µs guaranteed. Exceeding recommended impedance without compensation causes gain error and reduced SINAD.
MAX1246AEEE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- 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 ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1246AEEE FAQ
1.How can I place an order for MAX1246AEEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1246AEEE 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 MAX1246AEEE reliable?
The price and inventory of MAX1246AEEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1246AEEE is usually 5 days.
3.What payment methods are accepted for MAX1246AEEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1246AEEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1246AEEE?
MAX1246AEEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1246AEEE 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 MAX1246AEEE?
For technical support, including MAX1246AEEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1246AEEE requirements.
6.How does Aetrix verify that MAX1246AEEE is sourced from the original manufacturer or authorized distributors?
All MAX1246AEEE 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 MAX1246AEEE meets industry standards.
7.What is the process for return or replacement of MAX1246AEEE?
All MAX1246AEEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1246AEEE, 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 MAX1246AEEE part is unused and in its original packaging.
Return procedure for MAX1246AEEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1246AEEE 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…
