My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1247BEEE
- Part No.:
- MAX1247BEEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1247BEEE.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,920
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1247BEEE 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, requires an external reference, and delivers 133ksps conversion rate with 1.2mA supply current at 3V - ideal for portable data loggers and battery-powered medical instruments.
For engineers reviewing the MAX1247BEEE datasheet, MAX1247BEEE pinout, MAX1247BEEE application, or MAX1247BEEE equivalent, this page provides verified technical context, confirmed pin functions, real-world use cases in low-power embedded sensing, and validated alternative options for design continuity and sourcing flexibility.
Technical Context
The MAX1247BEEE uses successive-approximation register (SAR) architecture with internal track/hold circuitry, supporting both internal clock mode (35–65kHz) and external clock mode (up to 2MHz). Its analog input multiplexer enables flexible channel selection across four single-ended or two differential inputs, with COM pin serving as common-mode reference.
It implements a pseudo-differential sampling scheme where only the IN+ node is actively sampled; IN− must remain stable within ±0.5LSB during conversion. The device features a reference-buffer amplifier with ±1.5% adjustment range at REFADJ and supports external reference voltages from 1.0V to VDD + 50mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in sensor and instrumentation applications. |
| Conversion Rate | 133ksps (external clock @ 2MHz) - supports real-time sampling of audio-band and control-loop signals without undersampling artifacts. |
| Supply Voltage Range | +2.7V to +5.25V - enables direct integration into mixed-voltage systems including 3.3V and 5V microcontroller platforms. |
| Reference Requirement | External reference required - mandates external 2.5V source (or other valid voltage per spec), enabling system-level reference sharing and precision calibration. |
| INL (Integral Nonlinearity) | ±1 LSB (max) - ensures monotonicity and <0.025% full-scale error, critical for closed-loop control and calibrated measurement systems. |
| Power Consumption | 1.2mA @ 133ksps / 54µA @ 1ksps / 1µA in power-down - allows dynamic power scaling for ultra-low-duty-cycle battery operation. |
| Digital Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire serial - eliminates level-shifting or glue logic when interfacing with common MCUs and DSPs. |
Pinout & Package
MAX1247BEEE is housed in a 16-pin QSOP package (5.3mm × 10.2mm), occupying the same PCB footprint as an 8-pin SOIC - enabling compact layout and legacy board reuse.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +2.7V to +5.25V; powers analog and digital sections; decoupling capacitor required at pin. |
| CH0–CH3 (Pins 2–5) | Analog input channels | Software-selectable single-ended or differential inputs; CH0/CH1 and CH2/CH3 form two differential pairs. |
| COM (Pin 6) | Analog ground reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5LSB for full accuracy. |
| SHDN (Pin 7) | Three-level shutdown control | Pull low → full shutdown; float → external compensation; pull high → internal compensation mode for reference buffer. |
| REFADJ (Pin 9) | Reference buffer adjustment | Connects to external potentiometer or DAC for ±1.5% VREF tuning; tie to VDD to disable internal reference buffer. |
| VREF (Pin 8) | Reference input/output | Input for external reference (buffer disabled); output for internal reference (MAX1246 only); not used as output in MAX1247BEEE. |
| SCLK (Pin 16) | Serial clock input | Drives data transfer and (in external clock mode) SAR conversion timing; 40–60% duty cycle required. |
| CS (Pin 15) | Chip select | Active-low enable for serial interface; DOUT and SSTRB enter high-impedance state when CS = high. |
| DIN (Pin 14) | Serial data input | Receives 8-bit control byte on SCLK rising edge; defines channel, polarity, mode, and clock selection. |
| DOUT (Pin 12) | Serial data output | Outputs 12-bit result MSB-first on SCLK falling edge; high-impedance when CS = high. |
| SSTRB (Pin 13) | Serial strobe output | Signals conversion start/end: pulses high before MSB in external clock mode; goes low at conversion start in internal mode. |
| AGND (Pin 10) | Analog ground | Return path for analog circuitry; must be separated from DGND and connected at single point near VDD decoupling. |
| DGND (Pin 11) | Digital ground | Return path for digital I/O; isolated from AGND except at star ground point to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input modes | Runtime selection of unipolar/bipolar and single-ended/differential via 8-bit control byte - eliminates hardware reconfiguration for multi-sensor systems. |
| Low-power adaptive operation | 1.2mA active, 54µA at 1ksps, and 1µA shutdown - enables energy-proportional sampling in wake-on-event architectures. |
| Flexible clocking architecture | Supports both internal clock (no MCU timing burden) and external clock (precise synchronization) - simplifies firmware and timing-critical designs. |
| High-accuracy analog front-end | ±1 LSB INL, ±0.5 LSB DNL, and 73dB SINAD - meets requirements for Class I medical devices and industrial process monitoring. |
| Robust analog input protection | Clamp diodes allow −0.3V to VDD+0.3V input swing; accurate conversion guaranteed only within AGND+50mV to VDD−50mV - reduces need for external protection in benign environments. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over weeks using intermittent sampling. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog sensor outputs; configured for single-ended unipolar mode with automatic power-down between samples. Use Value: 54µA quiescent current at 1ksps extends CR2032 battery life beyond 12 months; QSOP-16 footprint minimizes PCB area in space-constrained enclosures. | Use Scenario: Handheld ECG monitor acquiring lead-II differential signals with real-time display and Bluetooth upload. IC Role / Device Role / Timing Role: Configured for differential mode on CH0/CH1; COM tied to mid-supply; external 2.5V reference ensures consistent gain across units. Use Value: ±1 LSB INL and 73dB SINAD preserve diagnostic waveform fidelity; SPI interface enables seamless integration with ARM Cortex-M4 host MCU. |
| Pen Digitizers | Battery-Powered Test Equipment |
Use Scenario: Active stylus digitizer tablet measuring X/Y electrode voltage differentials to compute pen position at >100Hz update rate. IC Role / Device Role / Timing Role: Uses two differential channels (CH0/CH1 and CH2/CH3) for simultaneous X and Y coordinate acquisition; SSTRB synchronized to controller timing. Use Value: 133ksps throughput supports oversampling for noise reduction; pseudo-differential architecture rejects common-mode noise from display interference. | Use Scenario: Field-deployable multimeter module measuring DC voltage, current, and resistance with auto-ranging and LCD display. IC Role / Device Role / Timing Role: Interfaces to precision op-amp front-end; unipolar mode with external 2.5V reference enables 0–2.5V full-scale measurement range. Use Value: Channel-to-channel offset matching ≤±0.25 LSB ensures consistent accuracy across ranges; 2.25MHz small-signal bandwidth supports fast settling after range switching. |
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, SPI-only interface, internal reference, 2.7–5.25V supply, SO-8 package | Lacks differential input support and software-configurable bipolar mode; smaller footprint but no COM pin or REFADJ | Select when board space is critical and only single-ended unipolar measurements are needed; verify reference stability under load. |
| MAX11131ETE+ | 12-bit, 500ksps, SPI/QSPI, internal reference, 2.7–3.6V supply, 16-TQFN package | Higher speed and lower noise (78dB SINAD), but narrower supply range and no external reference option | Choose for higher-performance portable instrumentation requiring faster sampling and better AC specs; not suitable for 5V systems. |
Compared with ADS7822U and MAX11131ETE+, the MAX1247BEEE offers unique flexibility in input configuration (differential/unipolar/bipolar), external reference control via REFADJ, and robust 5.25V tolerance - making it optimal for multi-range, multi-sensor, and mixed-voltage industrial designs where configurability outweighs raw speed.
Availability
MAX1247BEEE is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX1247BEEE 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 communications applications.
The MAX1246/MAX1247 family was designed for low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing flexible input configuration, minimal external components, and seamless µP/DSP interfacing.
FAQ
What is the operating temperature range for MAX1247BEEE?
The MAX1247BEEE is specified for 0°C to +70°C operation, as indicated by the "B" grade suffix in its ordering code. This commercial-grade temperature range supports deployment in indoor portable instruments, lab equipment, and non-extreme industrial environments. Full electrical performance - including ±1 LSB INL and 133ksps conversion rate - is guaranteed across this range when powered from +2.7V to +5.25V and using a stable external reference. The MAX1247BEEE does not support extended or military temperature grades.
Does MAX1247BEEE include an internal voltage reference?
No, the MAX1247BEEE requires an external reference voltage applied to the VREF pin. Unlike the MAX1246 variant, which integrates a 2.5V internal reference, the MAX1247BEEE disables its reference buffer when REFADJ is tied to VDD and relies entirely on an externally supplied reference - typically 2.5V, but compliant with 1.0V to VDD + 50mV per the datasheet. This design enables system-level reference sharing, improved temperature stability via precision external references, and flexibility in full-scale range selection.
How is the MAX1247BEEE pinout compatible with other packages in the MAX1246/MAX1247 family?
The MAX1247BEEE uses the 16-pin QSOP package, which shares identical pin numbering and function mapping with the 16-pin plastic DIP variants (e.g., MAX1247BCPE). All signal names (VDD, CH0–CH3, COM, SHDN, VREF, REFADJ, SCLK, CS, DIN, DOUT, SSTRB, AGND, DGND) and their electrical roles are fully consistent across these packages. This allows direct PCB footprint interchangeability between QSOP and DIP versions - critical for prototyping (DIP) and production (QSOP) transitions - without schematic or layout changes.
Can MAX1247BEEE perform differential measurements, and how is it configured?
Yes, the MAX1247BEEE supports true differential measurements using CH0/CH1 or CH2/CH3 as input pairs. Configuration is achieved via the 8-bit control byte: setting SGL/DIF = 0 (bit 2 = 0) and selecting appropriate SEL2/SEL1/SEL0 bits (Table 3). In differential mode, the device samples the voltage difference |IN+ − IN−|, with IN− required to remain stable within ±0.5LSB relative to AGND. A 0.1µF capacitor from the selected IN− channel to AGND is recommended to maintain stability and ensure full 12-bit accuracy.
What are the power-down modes supported by MAX1247BEEE, and how do they differ?
The MAX1247BEEE supports two distinct power-down modes controlled by PD1/PD0 bits (bits 1 and 0) in the control byte: "full power-down" (PD1=PD0=0) draws just 1µA and halts all internal circuitry, while "fast power-down" (PD1=0, PD0=1) consumes 54µA and retains reference buffer bias, enabling quicker wake-up (<1µs acquisition time). Both modes eliminate conversion activity and place DOUT/SSTRB in high-impedance state. Full power-down is optimal for long idle periods; fast power-down suits burst-sampling applications where latency matters.
MAX1247BEEE 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
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1247BEEE FAQ
1.How can I place an order for MAX1247BEEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1247BEEE 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 MAX1247BEEE reliable?
The price and inventory of MAX1247BEEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1247BEEE is usually 5 days.
3.What payment methods are accepted for MAX1247BEEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1247BEEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1247BEEE?
MAX1247BEEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1247BEEE 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 MAX1247BEEE?
For technical support, including MAX1247BEEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1247BEEE requirements.
6.How does Aetrix verify that MAX1247BEEE is sourced from the original manufacturer or authorized distributors?
All MAX1247BEEE 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 MAX1247BEEE meets industry standards.
7.What is the process for return or replacement of MAX1247BEEE?
All MAX1247BEEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1247BEEE, 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 MAX1247BEEE part is unused and in its original packaging.
Return procedure for MAX1247BEEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1247BEEE 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…
