My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1247BCEE+
- Part No.:
- MAX1247BCEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1247BCEE+.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:663
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1247BCEE+ from Maxim Integrated is a 12-bit serial analog-to-digital converter with integrated 4-channel multiplexer, track/hold, and SPI/QSPI/MICROWIRE-compatible interface. It operates from a single +2.7V to +5.25V supply, supports software-configurable unipolar/bipolar and single-ended/differential inputs, and achieves 133ksps conversion rate using external 2MHz clock. It is used in portable data loggers requiring low-power, high-accuracy digitization of sensor signals.
For engineers reviewing the MAX1247BCEE+ datasheet, MAX1247BCEE+ pinout, MAX1247BCEE+ application, or MAX1247BCEE+ equivalent, key selection criteria include its 12-bit resolution with ±1 LSB INL, external reference dependency, QSOP-16 package footprint, and shutdown current of 1µA - all critical for battery-powered instrumentation design.
Technical Context
The MAX1247BCEE+ employs successive-approximation architecture with internal track/hold circuitry and configurable input topology. Its analog front-end supports pseudo-differential sampling via CH0–CH3 and COM pins, with acquisition time of 1.5µs and aperture jitter under 50ps.
It uses either an external serial clock (up to 2MHz) or internal oscillator for conversion timing, and features a three-level SHDN pin enabling full power-down, fast power-down, or reference-buffer compensation mode - directly impacting system-level power management in embedded sensing nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise sensor signal digitization |
| INL (Integral Nonlinearity) | ±1 LSB - ensures monotonicity and ≤0.024% full-scale error across temperature |
| Conversion Rate | 133ksps at 2MHz SCLK - enables real-time sampling of audio-band and control-loop signals |
| Supply Voltage Range | +2.7V to +5.25V - compatible with Li-ion, USB, and industrial 3.3V/5V rails without level-shifting |
| Power Consumption | 1.2mA active (3V), 1µA shutdown - extends battery life in portable medical instruments |
| Reference Requirement | External VREF (1.0V to VDD+50mV) - allows system-level reference sharing and precision calibration |
| Input Configuration | 4-channel SE or 2-channel diff - supports flexible sensor interfacing including RTD bridges and differential transducers |
Pinout & Package
MAX1247BCEE+ is housed in a 16-pin QSOP package (5.3mm × 10.0mm), occupying the same PCB area as an 8-pin SOIC - enabling compact layout in space-constrained handheld devices.
| 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 bypass |
| CH0–CH3 (Pins 2–5) | Analog input channels | Software-selectable single-ended or differential inputs; max input range = 0V to VREF (unipolar) or ±VREF/2 (bipolar) |
| COM (Pin 6) | Analog ground reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5 LSB during conversion |
| SHDN (Pin 7) | Three-level shutdown control | Low = full shutdown (1µA); float = external REFADJ compensation; high = internal compensation mode |
| AGND (Pin 10) | Analog ground | Separate return path for analog circuitry; must be star-connected to minimize noise coupling |
| DGND (Pin 11) | Digital ground | Return for serial interface and logic; isolated from AGND except at single point near VDD decoupling |
| VREF (Pin 8) | Reference input/output | External reference input (buffer disabled); accepts 1.0V to VDD+50mV; 18–25kΩ input impedance |
| SCLK (Pin 16) | Serial clock input | Drives data transfer and (in external clock mode) SAR conversion; 40–60% duty cycle required |
| CS (Pin 15) | Chip select | Active-low enable; controls DOUT three-state behavior and initiates control byte recognition |
| DIN (Pin 14) | Serial data input | Receives 8-bit control byte on SCLK rising edge; defines channel, polarity, and clock mode |
| 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 | Pulses high before MSB decision (external clock) or indicates conversion start/end (internal clock) |
| REFADJ (Pin 9) | Reference buffer adjust | Tie to VDD to disable internal buffer; otherwise enables ±1.5% VREF adjustment via external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| 4-wire SPI/QSPI/MICROWIRE interface | Direct connection to microcontrollers without glue logic; CPOL=0/CPHA=0 compatible |
| Software-configurable input modes | Runtime selection of unipolar/bipolar and single-ended/differential via control byte bits 3 and 2 |
| Track/hold with 2.25MHz small-signal bandwidth | Enables accurate digitization of transient events and undersampling of RF signals up to ~1MHz |
| Three-level SHDN pin | Eliminates need for external logic to manage power states - simplifies firmware and reduces BOM count |
| Channel-to-channel offset matching | ±0.25 LSB - minimizes gain/offset errors in multi-sensor systems like 4-channel thermocouple arrays |
Applications
| Portable Data Logging | Medical Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure over 72-hour field deployment. IC Role / Device Role / Timing Role: Primary ADC digitizing four analog sensor outputs with programmable sampling intervals and automatic shutdown between reads. Use Value: 1µA shutdown current and 1.2mA active current at 3V extend battery life beyond 12 months on two AA cells. | Use Scenario: Handheld ECG monitor acquiring lead-II differential signals with >80dB common-mode rejection. IC Role / Device Role / Timing Role: Precision front-end ADC converting amplified biopotential signals with bipolar ±1.25V input range and 12-bit resolution. Use Value: ±1 LSB INL and 73dB SINAD ensure diagnostic-grade waveform fidelity per AAMI EC11 standards. |
| Pen Digitizers | Battery-Powered Instruments |
Use Scenario: Active stylus interface in tablet PCs detecting tip pressure and tilt angle via resistive sensor array. IC Role / Device Role / Timing Role: High-speed 4-channel ADC sampling X/Y position and pressure sensors at 100ksps with minimal latency. Use Value: 1.5µs acquisition time and 6µs conversion time support real-time pen tracking with <5ms end-to-end response. | Use Scenario: Portable multimeter measuring AC/DC voltage, current, and resistance with autoranging and auto-zero. IC Role / Device Role / Timing Role: Core measurement ADC accepting both unipolar (voltage) and bipolar (current shunt) inputs via software reconfiguration. Use Value: Single-supply operation down to +2.7V and internal track/hold eliminate need for dual-rail supplies or external sample-hold ICs. |
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, +2.7V to +5.25V, internal reference only, no SHDN pin | Lacks three-level shutdown and external reference flexibility; requires external reference buffer for precision | Choose when internal reference suffices and board space permits larger SO-8 package |
| MAX11131ETE+ | 12-bit, 500ksps, +2.7V to +3.6V, internal reference, SPI-only interface | Narrower supply range; higher speed but higher 2.5mA active current; no bipolar input support | Prefer for high-throughput, single-supply 3.3V systems where bipolar mode is unnecessary |
Compared with ADS7822U and MAX11131ETE+, the MAX1247BCEE+ uniquely balances wide supply range, external reference control, three-level power management, and software-configurable bipolar/single-ended operation - making it optimal for multi-sensor, battery-sensitive, and calibration-critical instrumentation.
Availability
MAX1247BCEE+ is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered test equipment requiring stable component supply and long-term manufacturability.
Supply support for MAX1247BCEE+ 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, serial 12-bit ADCs optimized for portable and battery-operated systems where size, power, and configurability are critical - not just for data acquisition, but for intelligent sensor nodes and edge measurement devices.
FAQ
What is the reference configuration requirement for MAX1247BCEE+?
The MAX1247BCEE+ requires an external reference applied to the VREF pin; it does not include an internal reference. The reference voltage must be between 1.0V and VDD+50mV, with typical operation at 2.5V. The internal reference buffer is disabled by tying REFADJ to VDD, and the device exhibits 18–25kΩ input impedance at VREF. This external reference dependency allows system-level calibration and sharing with other precision components in the signal chain.
Does MAX1247BCEE+ support both unipolar and bipolar input ranges?
Yes, MAX1247BCEE+ supports both unipolar and bipolar input configurations via software control. When UNI/BIP = 1 (bit 3 of control byte), the input range is 0V to VREF for single-ended mode or ±VREF/2 for differential mode. This flexibility enables direct interfacing with diverse sensors - such as 0–5V industrial transmitters (unipolar) or ±2.5V bridge outputs (bipolar) - without external level-shifting circuitry.
What is the function of the SHDN pin on MAX1247BCEE+?
The SHDN pin on MAX1247BCEE+ provides three distinct operating states: pulling it low enables full power-down (1µA supply current), letting it float configures the reference buffer for external compensation (via REFADJ), and pulling it high selects internal compensation mode. This eliminates the need for external logic or multiple control lines, simplifying power sequencing in resource-constrained microcontroller systems while maintaining precise reference stability across modes.
Can MAX1247BCEE+ operate with a 3.3V microcontroller SPI interface?
Yes, MAX1247BCEE+ is fully compatible with 3.3V SPI interfaces. Its digital inputs (DIN, SCLK, CS, SHDN) accept VIH ≥ 0.7×VDD and VIL ≤ 0.3×VDD, and its outputs (DOUT, SSTRB) drive VOH ≥ VDD−0.5V and VOL ≤ 0.4V at 16mA sink - meeting standard 3.3V CMOS levels. No level shifters are needed when interfacing with 3.3V MCUs, and the device supports CPOL=0/CPHA=0 timing for seamless integration with most SPI peripherals.
What is the maximum source impedance supported at the analog inputs of MAX1247BCEE+?
The MAX1247BCEE+ specifies a maximum acquisition time of 1.5µs, derived from tACQ = 9 × (RS + RIN) × 16pF, where RIN = 9kΩ. For tACQ ≤ 1.5µs, RS must be ≤ 1kΩ. Higher source impedances (up to ~10kΩ) are usable if a 0.01µF capacitor is placed at each analog input to limit RC bandwidth and maintain accuracy - though this reduces effective signal bandwidth and may require anti-alias filtering.
MAX1247BCEE+ 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:
- Active
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1247BCEE+ FAQ
1.How can I place an order for MAX1247BCEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1247BCEE+ 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 MAX1247BCEE+ reliable?
The price and inventory of MAX1247BCEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1247BCEE+ is usually 5 days.
3.What payment methods are accepted for MAX1247BCEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1247BCEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1247BCEE+?
MAX1247BCEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1247BCEE+ 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 MAX1247BCEE+?
For technical support, including MAX1247BCEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1247BCEE+ requirements.
6.How does Aetrix verify that MAX1247BCEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1247BCEE+ 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 MAX1247BCEE+ meets industry standards.
7.What is the process for return or replacement of MAX1247BCEE+?
All MAX1247BCEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1247BCEE+, 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 MAX1247BCEE+ part is unused and in its original packaging.
Return procedure for MAX1247BCEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1247BCEE+ 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…
