My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1247BCPE
- Part No.:
- MAX1247BCPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1247BCPE.pdf
- Description:
- IC ADC 12BIT SAR 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,917
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1247BCPE 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 at VREF pin. It is used in portable data loggers and battery-powered medical instruments requiring low-power, high-accuracy signal digitization.
For engineers reviewing the MAX1247BCPE datasheet, MAX1247BCPE pinout, MAX1247BCPE application, or MAX1247BCPE equivalent, key selection criteria include its 12-bit resolution with ±1 LSB INL (max), external reference dependency, QSOP-16 package compatibility, and shutdown current of 1µA - all critical for precision, low-power embedded sensing systems.
Technical Context
The MAX1247BCPE employs 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 0.225MHz) and external clock (up to 2.0MHz) 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% voltage-adjustment range via REFADJ, requires external 2.5V reference applied to VREF, and provides serial strobe (SSTRB) output for TMS320-family DSP synchronization. The device powers up automatically on serial interface access and achieves <60µA average supply current at reduced sampling rates via programmable power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-fidelity analog signal representation. |
| INL (Max) | ±1 LSB - ensures monotonicity and ≤0.024% full-scale linearity error across temperature and supply range. |
| Sampling Rate | 133ksps - enables real-time capture of signals up to ~66.5kHz (Nyquist-limited) with external 2MHz clock. |
| Supply Range | +2.7V to +5.25V - supports direct integration into 3.3V and 5V systems without level-shifting. |
| Power Consumption | 1.2mA @ 133ksps / 1µA @ power-down - enables >1-year battery life in intermittent-sampling applications. |
| Reference Input | External 2.5V at VREF pin - decouples accuracy from internal reference drift; supports precision external references. |
| Interface Protocol | SPI/QSPI/MICROWIRE 4-wire - interoperates with standard microcontroller peripherals without glue logic. |
Pinout & Package
MAX1247BCPE is housed in a 16-pin QSOP package (same board footprint as 8-pin SO), with exposed pad not electrically connected. Pin functions are validated per Maxim's official pin description table (Rev 2, 10/01).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +2.7V to +5.25V; powers analog and digital sections; bypass with 0.1µF near pin. |
| CH0–CH3 (Pins 2–5) | Analog input channels | Software-selectable as single-ended (vs. COM) or differential pairs (CH0/CH1, CH2/CH3); max input = 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; connects to AGND. |
| SHDN (Pin 7) | Three-level shutdown control | Low = full shutdown (1µA); float = external compensation; high = internal compensation - no external pull required. |
| AGND (Pin 10) | Analog ground return | Separate from DGND to minimize digital noise coupling into ADC core; star-ground recommended. |
| DGND (Pin 11) | Digital ground return | Return path for SCLK, DIN, DOUT, CS, SSTRB; ties to system digital ground plane. |
| VREF (Pin 8) | Reference input/output | Input-only for MAX1247; accepts 1.0V to (VDD + 50mV); 18–25kΩ input impedance; 100–150nA bias current. |
| REFADJ (Pin 9) | Reference buffer adjustment | Tie to VDD to disable internal buffer; otherwise enables ±1.5% fine-tuning of external reference path. |
| SCLK (Pin 16) | Serial clock input | Drives data transfer and (in external mode) SAR conversion; 40–60% duty cycle required; max 2MHz. |
| CS (Pin 15) | Chip select (active-low) | Enables serial interface; DOUT goes high-Z when CS high; controls timing of control byte and data reads. |
| DIN (Pin 14) | Serial data input | Accepts 8-bit control byte on SCLK rising edge; defines channel, mode, clock, and power-down settings. |
| DOUT (Pin 12) | Serial data output | Outputs 12-bit result MSB-first on SCLK falling edge; high-Z when CS high; compatible with 3.3V/5V logic. |
| SSTRB (Pin 13) | Serial strobe output | Pulses high before MSB in external clock mode; asserts low during conversion in internal mode - syncs to DSPs. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended (4 ch) or differential (2 ch) operation selected via control byte - eliminates hardware reconfiguration. |
| Low-power shutdown modes | 1µA full power-down and 54µA fast power-down - enables energy harvesting and ultra-low-duty-cycle sensing. |
| Reference flexibility | External reference input with ±1.5% adjustability via REFADJ - supports high-accuracy external refs without trimming. |
| Integrated track/hold | 1.5µs acquisition time with 2.25MHz small-signal bandwidth - captures transients and enables undersampling. |
| Direct DSP interface | SSTRB output synchronized to conversion start/end - eliminates polling and reduces CPU overhead in TMS320 systems. |
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 multi-channel analog sensor outputs with configurable gain and offset calibration. Use Value: 1.2mA active current and 1µA shutdown extend coin-cell life; 12-bit resolution captures sub-degree thermal changes. |
Use Scenario: Handheld ECG monitor acquiring lead-II differential biopotential signals at 1ksps. IC Role / Device Role / Timing Role: Precision front-end ADC with differential input mode rejecting common-mode noise from body coupling. Use Value: ±1 LSB INL and 73dB SINAD ensure diagnostic-grade waveform fidelity; QSOP-16 eases layout in compact enclosures. |
| Pen Digitizers | Process Control Sensors |
|
Use Scenario: Active stylus digitizer tablet measuring X/Y electrode voltage gradients for position tracking. IC Role / Device Role / Timing Role: High-speed 4-channel ADC scanning capacitive sensor grid with minimal latency. Use Value: 133ksps sampling and 6µs conversion time enable real-time pen movement response; SPI interface simplifies MCU integration. |
Use Scenario: Industrial PLC analog input module conditioning 4–20mA loop signals from flow/pressure transmitters. IC Role / Device Role / Timing Role: Isolated channel ADC with bipolar input support for negative-offset industrial sensors. Use Value: Software-selectable bipolar mode (±VREF/2) accommodates transmitter zero-shift; 2.7–5.25V supply tolerates field wiring variations. |
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 +5.5V, internal reference only, no REFADJ, 8-pin SOIC | Lacks external reference support and software-configurable bipolar mode; smaller package but no COM pin for true single-ended referencing | Select when internal reference suffices and board space is constrained; avoid if external reference or precise COM-referenced inputs are required. |
| MAX11131AUT+ | 12-bit, 500ksps, +2.7V to +3.6V only, internal reference, SPI-only (no QSPI/MICROWIRE), 8-pin µMAX | Higher speed but narrower supply range; no external reference option; lacks SSTRB for DSP sync | Choose for higher throughput in 3.3V-only systems where DSP synchronization is unnecessary and reference flexibility is secondary. |
Compared with MAX1247BCPE, ADS7822U trades reference flexibility and input configuration for compactness, while MAX11131AUT+ prioritizes speed and size over supply range and interface versatility - making MAX1247BCPE optimal for mixed-voltage, precision, and DSP-coupled designs.
Availability
MAX1247BCPE is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and process control applications requiring stable component supply, long-term manufacturability, and guaranteed traceability.
Supply support for MAX1247BCPE 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications markets.
The MAX1246/MAX1247 family was designed for low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing flexible input configuration, serial interface simplicity, and robust shutdown behavior.
FAQ
What is the operating temperature range for MAX1247BCPE?
The MAX1247BCPE 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 aligns with its target applications in portable and industrial instrumentation where ambient conditions remain within typical indoor environments. The device maintains ±1 LSB INL and 1.2mA supply current performance across this full range.
Does MAX1247BCPE include an internal voltage reference?
No, MAX1247BCPE does not include an internal voltage reference. Unlike the MAX1246 variant, the MAX1247 requires an external 2.5V reference applied to the VREF pin. Its reference buffer amplifier remains functional but must be disabled by tying REFADJ to VDD when using an external reference - a key distinction confirmed in the General Description and Electrical Characteristics sections.
What package type is used for MAX1247BCPE?
MAX1247BCPE is supplied in a 16-pin QSOP package, as explicitly stated in the Ordering Information table and Pin Configuration section. This package occupies the same PCB area as an 8-pin SO, enabling compact layouts while providing sufficient pins for 4 analog inputs, reference, shutdown, and full serial interface - distinct from the DIP variants (e.g., MAX1247BCPE vs. MAX1247BCPE+).
How does the SHDN pin function on MAX1247BCPE?
The SHDN pin on MAX1247BCPE is a three-level control: pulled low for full power-down (1µA), left floating for external reference compensation mode, and pulled high for internal compensation mode. It does not require external pull-up/down resistors. This design allows flexible power management without additional components - a feature validated in the Pin Description and Electrical Characteristics tables.
Can MAX1247BCPE perform differential measurements?
Yes, MAX1247BCPE supports true differential measurements across two independent channel pairs: CH0/CH1 and CH2/CH3. This is enabled via the SGL/DIF bit in the control byte (bit 2 = 0), with channel selection determined by SEL2–SEL0 bits. The device's pseudo-differential architecture requires the IN– input to remain stable within ±0.5 LSB, verified in the Detailed Description and Typical Operating Circuit.
MAX1247BCPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1247BCPE FAQ
1.How can I place an order for MAX1247BCPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1247BCPE 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 MAX1247BCPE reliable?
The price and inventory of MAX1247BCPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1247BCPE is usually 5 days.
3.What payment methods are accepted for MAX1247BCPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1247BCPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1247BCPE?
MAX1247BCPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1247BCPE 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 MAX1247BCPE?
For technical support, including MAX1247BCPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1247BCPE requirements.
6.How does Aetrix verify that MAX1247BCPE is sourced from the original manufacturer or authorized distributors?
All MAX1247BCPE 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 MAX1247BCPE meets industry standards.
7.What is the process for return or replacement of MAX1247BCPE?
All MAX1247BCPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1247BCPE, 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 MAX1247BCPE part is unused and in its original packaging.
Return procedure for MAX1247BCPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1247BCPE 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…
