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Analog Devices Inc./Maxim Integrated MAX1247CCPE
- Part No.:
- MAX1247CCPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1247CCPE.pdf
- Description:
- 4-CHANNEL, SERIAL 12-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:757
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Product details
Overview
MAX1247CCPE 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, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. It operates from a single +2.7V to +5.25V supply, consumes 1.2mA at 133ksps (3V), and supports external reference input. It is used in portable data loggers and battery-powered medical instruments requiring low-power, high-accuracy signal digitization.
For engineers reviewing the MAX1247CCPE datasheet, MAX1247CCPE pinout, MAX1247CCPE application, or MAX1247CCPE equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated QSOP-16 pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to OEM and embedded design use cases.
Technical Context
The MAX1247CCPE implements 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 clock (up to 2MHz) conversion modes. Its analog front-end allows software-selectable input configurations: 4-channel single-ended or 2-channel differential, with common-mode range from AGND to VDD.
It features a reference-buffer amplifier with ±1.5% adjustment range and requires an external reference voltage applied at VREF (1.0V to VDD+50mV); the internal reference is disabled by pulling REFADJ to VDD. Digital interface timing complies with SPI Mode 0 (CPOL=0, CPHA=0), and SSTRB provides synchronous strobe output for TMS320-family DSP interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.0244% of full-scale range, enabling precise measurement of small-signal variations in sensor or instrumentation applications. |
| Sampling Rate | 133ksps (max) - supports real-time capture of audio-band and control-loop signals without undersampling artifacts when using anti-alias filtering. |
| INL | ±2.0 LSB (max) - ensures monotonicity and <0.05% absolute linearity error across full temperature range (0°C to +70°C), critical for calibration-sensitive systems. |
| Supply Range | +2.7V to +5.25V - enables direct integration into mixed-voltage systems (e.g., 3.3V logic + 5V analog rails) without level-shifting circuitry. |
| Power Consumption | 1.2mA @ 133ksps / 54µA @ 1ksps / 1µA in power-down - allows dynamic power scaling in battery-operated devices to extend runtime between charges. |
| Reference Input | External only (1.0V to VDD+50mV) - decouples accuracy from internal drift; supports precision references (e.g., REF5025) for <10ppm/°C system-level stability. |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 4-wire - connects directly to microcontrollers (e.g., STM32, MSP430) without glue logic; supports MSB-first, 12-bit result with automatic CS-controlled tri-state outputs. |
Pinout & Package
MAX1247CCPE is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), occupying the same PCB footprint as an 8-pin SOIC - enabling compact layout in space-constrained portable instruments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +2.7V to +5.25V; powers analog and digital sections; requires local 0.1µF ceramic bypass to DGND/AGND. |
| CH0–CH3 (Pins 2–5) | Analog input channels | Software-selectable as single-ended (vs. COM) or differential pairs (CH0/CH1, CH2/CH3); max input swing = AGND−0.3V to VDD+0.3V. |
| 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 but tied at single point. |
| SHDN (Pin 7) | Three-level shutdown control | Pull low → full power-down (1µA); float → external compensation mode; pull high → internal compensation mode (reference buffer). |
| AGND (Pin 10) | Analog ground return | Low-noise return path for analog circuitry; must be isolated from DGND except at single star point near VDD decoupling. |
| DGND (Pin 11) | Digital ground return | Return for serial interface and logic; connects to µP ground plane; separation from AGND prevents digital noise coupling into ADC. |
| VREF (Pin 8) | Reference voltage input | Accepts external 1.0V–(VDD+50mV) reference; internal buffer disabled when REFADJ = VDD; no internal reference generation. |
| SCLK (Pin 16) | Serial clock input | Drives data I/O and (in external clock mode) SAR conversion; 40–60% duty cycle required; max 2MHz frequency. |
| CS (Pin 15) | Chip select (active-low) | Enables serial interface; DOUT and SSTRB go high-Z when CS = high; defines start of control byte on first rising edge after CS fall. |
| DIN (Pin 14) | Serial data input | Accepts 8-bit control byte on SCLK rising edges; bit format includes START, channel select, UNI/BIP, SGL/DIF, and PD1/PD0 clock/power mode bits. |
| DOUT (Pin 12) | Serial data output | Outputs 12-bit conversion result MSB-first on SCLK falling edges; high-Z when CS = high; compatible with µP MISO lines. |
| SSTRB (Pin 13) | Serial strobe output | Signals conversion start/end: low during conversion (internal clock mode) or one-cycle pulse before MSB decision (external clock mode); syncs with TMS320 DSPs. |
| REFADJ (Pin 9) | Reference buffer adjustment | Tie to VDD to disable internal reference buffer; otherwise, enables ±1.5% fine-tuning of external reference via feedback network. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input modes | Single-ended (4 ch) or differential (2 ch), unipolar (0V to VREF) or bipolar (±VREF/2) - eliminates need for external signal conditioning op-amps in multi-sensor systems. |
| Low-power operation with dynamic scaling | 1.2mA active / 54µA low-rate / 1µA shutdown - enables firmware-controlled power gating between measurements to extend battery life in portable diagnostics. |
| SPI/QSPI/MICROWIRE-native interface | No external logic required; supports CPOL=0/CPHA=0; 12-bit result returned in two 8-bit transfers - reduces µP GPIO usage and simplifies driver development. |
| Track/hold acquisition time ≤1.5µs | Ensures accurate sampling of fast transients (e.g., ECG spikes, vibration bursts) without external sample-hold ICs, even with source impedances up to 1kΩ. |
| QSOP-16 footprint compatibility | Same board area as 8-pin SOIC - allows drop-in upgrade from lower-resolution ADCs or space-efficient stacking in handheld enclosures. |
Applications
| Portable Data Logging | Medical Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over 72-hour deployments. IC Role / Device Role / Timing Role: Primary ADC digitizing four analog sensor outputs sequentially; uses software-configurable single-ended mode and external precision reference for long-term stability. Use Value: 1.2mA active current and 1µA shutdown enable >6 months runtime on two AA cells; QSOP-16 footprint minimizes PCB area in compact enclosure. |
Use Scenario: Handheld blood glucose meter with electrochemical test strip interface and LCD display. IC Role / Device Role / Timing Role: Signal digitizer for amperometric current measurement; configured in differential mode to reject common-mode noise from strip electrodes. Use Value: ±2.0 LSB INL ensures <0.5% measurement error across 0–600mg/dL range; 133ksps sampling captures transient response during strip insertion. |
| Pen Digitizers | Battery-Powered Instruments |
Use Scenario: Active stylus digitizer tablet capturing X/Y position and pressure via analog resistive grid. IC Role / Device Role / Timing Role: High-speed ADC sampling four analog channels (X+, X−, Y+, Y−) in differential mode to compute coordinate and force values. Use Value: 2.25MHz small-signal bandwidth resolves stylus movement at >200 points/sec; SPI interface synchronizes with host µP for low-latency reporting. |
Use Scenario: Field-deployable pH/ORP meter with replaceable probe and Bluetooth telemetry. IC Role / Device Role / Timing Role: Precision ADC acquiring calibrated analog output from ISFET or glass electrode amplifier; uses external 2.5V reference for repeatability. Use Value: External reference input eliminates internal drift; ±1.5% REFADJ tuning compensates for reference tolerance; 54µA low-rate mode extends field battery life. |
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 |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, single-supply +2.7V to +5.25V, internal reference only, SPI-compatible, 8-pin SOIC package. | Lacks software-selectable bipolar/differential mode and external reference option; limited to unipolar single-ended inputs. | Select when board space is critical and only unipolar sensing is needed; avoid if bipolar signal ranges or external reference traceability are required. |
| MAX11131AUT+ | 12-bit, 500ksps, +2.7V to +3.6V supply, internal reference, SPI/QSPI, 6-pin SOT23 package, built-in PGA (0.5x–16x). | Higher speed and integrated programmable gain, but narrower supply range and no external reference support. | Choose for higher throughput or gain flexibility in 3.3V-only systems; not suitable for 5V analog rails or metrology-grade external reference use. |
Compared with ADS7822U and MAX11131AUT+, the MAX1247CCPE uniquely supports external reference input and software-configurable bipolar/differential operation in a QSOP-16 package - making it optimal for portable instrumentation requiring traceable accuracy and flexible analog front-end configuration.
Availability
MAX1247CCPE is available at Aetrix Electronics and suitable for portable data logging, medical instruments, and battery-powered instruments requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for MAX1247CCPE 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 MAX1246/MAX1247 product line delivers low-power, high-accuracy serial ADCs optimized for portable and battery-constrained systems where size, energy efficiency, and configurable analog input flexibility are critical design requirements.
FAQ
What is the operating temperature range for the MAX1247CCPE?
The MAX1247CCPE is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range aligns with its intended use in portable consumer and industrial instrumentation where extreme thermal stress is not expected. The device maintains ±2.0 LSB INL and 133ksps sampling rate across this full range, as verified in the manufacturer's electrical characteristics tables under "MAX1247_C_E" ordering grade.
Does the MAX1247CCPE include an internal voltage reference?
No, the MAX1247CCPE does not include an internal voltage reference. Unlike the MAX1246 variant, the MAX1247CCPE requires an external reference voltage applied to the VREF pin (1.0V to VDD+50mV). The internal reference buffer is disabled by tying REFADJ to VDD, confirming that reference accuracy and stability depend entirely on the external source selected by the designer.
Can the MAX1247CCPE operate with a 5V supply?
Yes, the MAX1247CCPE supports a positive supply voltage from +2.7V to +5.25V, making it fully compatible with standard 5V logic and analog systems. At VDD = 5.25V, it delivers 1.2mA typical supply current at 133ksps and maintains full 12-bit resolution and ±2.0 LSB INL, as confirmed in the "POWER REQUIREMENTS" section of the datasheet.
How is the MAX1247CCPE interfaced with a microcontroller SPI port?
The MAX1247CCPE connects directly to standard SPI ports using Mode 0 (CPOL = 0, CPHA = 0): CS active-low, SCLK idle low, data sampled on rising edge (DIN) and output on falling edge (DOUT). A complete conversion requires one 8-bit control byte write followed by two 8-bit reads to retrieve the 12-bit result - no additional level shifters or timing glue logic are needed.
What package type is used for the MAX1247CCPE?
The MAX1247CCPE is packaged in a 16-pin QSOP (Quarter-Size Outline Package) with 0.65mm lead pitch and 5.3mm × 10.2mm body dimensions. This package occupies the same PCB footprint as an 8-pin SOIC, enabling compact layouts in space-constrained portable devices while providing sufficient pins for full analog and digital I/O isolation.
MAX1247CCPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- 4-Wire Serial, DSP, 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
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1247CCPE FAQ
1.How can I place an order for MAX1247CCPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1247CCPE 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 MAX1247CCPE reliable?
The price and inventory of MAX1247CCPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1247CCPE is usually 5 days.
3.What payment methods are accepted for MAX1247CCPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1247CCPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1247CCPE?
MAX1247CCPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1247CCPE 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 MAX1247CCPE?
For technical support, including MAX1247CCPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1247CCPE requirements.
6.How does Aetrix verify that MAX1247CCPE is sourced from the original manufacturer or authorized distributors?
All MAX1247CCPE 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 MAX1247CCPE meets industry standards.
7.What is the process for return or replacement of MAX1247CCPE?
All MAX1247CCPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1247CCPE, 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 MAX1247CCPE part is unused and in its original packaging.
Return procedure for MAX1247CCPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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