My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX147CEAP+T
- Part No.:
- MAX147CEAP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX147CEAP+T.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,252
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX147CEAP+T from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) with software-configurable unipolar/bipolar and single-ended/differential inputs, 133ksps conversion rate, ±0.5 LSB INL, and operation from +2.7V to +5.25V - used in portable data loggers and battery-powered medical instruments.
For engineers reviewing the MAX147CEAP+T datasheet, MAX147CEAP+T pinout, MAX147CEAP+T application, or MAX147CEAP+T equivalent, this page delivers verified electrical specs, real-world timing behavior, package-validated pin functions, and two confirmed alternative ADCs for low-power, multi-channel sampling systems requiring external reference support and SPI/QSPI/MICROWIRE compatibility.
Technical Context
The MAX147CEAP+T implements successive-approximation architecture with integrated track/hold, supporting both internal clock mode (for autonomous conversion control) and external clock mode (where SCLK directly governs conversion timing at up to 2MHz). Its pseudo-differential input structure enables 4-channel differential or 8-channel single-ended acquisition with COM-referenced zero-code alignment.
It features a reference-buffer amplifier requiring external VREF (2.500V typical), REFADJ-adjustable over ±1.5%, and supports shutdown via hard-wired SHDN pin or software-selectable power-down - achieving 1µA shutdown current and 54µA at 1ksps sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision sensing applications. |
| Conversion Rate | 133ksps - enables real-time capture of fast transients up to ~65kHz full-power bandwidth without aliasing. |
| INL | ±0.5 LSB - ensures monotonicity and <0.012% full-scale linearity error after calibration, critical for closed-loop control accuracy. |
| Supply Range | +2.7V to +5.25V - supports direct interface with 3.3V and 5V logic domains and battery voltage decay down to 2.7V. |
| Reference Requirement | External 2.500V reference at VREF pin - mandates external precision reference IC or DAC for stable conversion基准, unlike MAX146's internal reference. |
| Power Consumption | 1.2mA at 133ksps / 54µA at 1ksps - allows dynamic duty-cycling in energy-constrained portable designs. |
| Digital Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire serial - eliminates level-shifting or glue logic when interfacing with common microcontrollers and DSPs. |
Pinout & Package
MAX147CEAP+T is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, JEDEC MO-153 compliant, footprint compatible with MAX146CEAP+T and suitable for automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Software-selectable as 8 single-ended or 4 differential pairs; each channel has ±0.3V overvoltage tolerance and 16pF input capacitance. |
| COM (Pin 9) | Analog ground reference | Sets zero-code voltage in single-ended mode; must remain stable to ±0.5 LSB during conversion to avoid offset error. |
| SHDN (Pin 10) | Three-level shutdown control | Pull low for full shutdown (1µA), float for external compensation mode, or pull high for internal compensation - no external pull-up/down required. |
| VREF (Pin 11) | Reference input/output node | Accepts 2.500V external reference; buffer disabled by tying REFADJ to VDD - essential for accurate full-scale scaling. |
| REFADJ (Pin 12) | Reference buffer adjustment | Enables ±1.5% fine-tuning of reference gain; tie to VDD to disable internal buffer - required for MAX147 operation. |
| DIN (Pin 17) | Serial data input | Accepts 8-bit control byte on SCLK rising edge; START bit defines MSB; supports channel, polarity, and clock-mode configuration. |
| SCLK (Pin 19) | Serial clock input | Drives data transfer and (in external mode) conversion timing; 50% duty cycle required; max 2MHz frequency. |
| CS (Pin 18) | Active-low chip select | Enables serial interface; DOUT and SSTRB go high-Z when CS = high - enables multi-device bus sharing. |
| DOUT (Pin 15) | Serial data output | Outputs 12-bit result MSB-first on SCLK falling edge; high-Z when CS = high - prevents bus contention. |
| SSTRB (Pin 16) | Serial strobe output | Pulses high one SCLK period before MSB in external mode; signals conversion start/end - simplifies TMS320 DSP synchronization. |
| AGND/DGND (Pins 13/14) | Analog/digital ground | Separate AGND and DGND pins require star grounding at single point to minimize digital noise coupling into analog path. |
| VDD (Pin 20) | Positive supply | Supplies analog and digital circuitry; bypass with 4.7µF (bulk) + 0.1µF (high-frequency) capacitors near pin. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with software-configurable input modes | Supports both unipolar (0V to VREF) and bipolar (±VREF/2) ranges, plus single-ended or differential acquisition - reduces external signal conditioning components. |
| Low-power shutdown with automatic wake-on-access | Enters 1µA shutdown when SHDN = low; powers up automatically on CS assertion - enables per-conversion power gating without firmware overhead. |
| Reference buffer with ±1.5% adjustability | Allows precise system-level gain calibration via REFADJ pin; external compensation mode (SHDN floating) improves PSRR and thermal stability. |
| Track/hold acquisition time ≤1.5µs | Ensures accurate sampling of signals with source impedances ≤1kΩ; higher impedances require local 0.01µF bypass at each CHx pin. |
| Spurious-free dynamic range of 90dB | Minimizes harmonic distortion in high-resolution measurements - validated at 10kHz input, enabling clean spectral analysis in instrumentation. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over 72-hour deployments. IC Role / Device Role / Timing Role: Primary ADC acquiring 8 analog sensor outputs sequentially at 1ksps, using software-triggered power-down between samples. Use Value: 54µA active current at 1ksps extends CR2032 battery life beyond 12 months; external reference ensures long-term measurement stability across temperature. |
Use Scenario: Handheld ECG monitor digitizing lead I, II, III, aVR, aVL, aVF, V1–V6 with simultaneous 12-lead capability. IC Role / Device Role / Timing Role: Multi-channel front-end ADC performing pseudo-differential acquisition with COM referenced to Wilson central terminal. Use Value: ±0.5 LSB INL and 90dB SFDR preserve diagnostic waveform fidelity; SPI interface enables direct connection to ARM Cortex-M4 MCU with DMA offload. |
| Battery-Powered Test Equipment | Industrial Process Monitoring |
Use Scenario: Portable multimeter measuring DC voltage, AC RMS, resistance, and diode drop with auto-ranging and hold function. IC Role / Device Role / Timing Role: Precision ADC handling multiple input ranges via programmable gain amplifier (PGA) and multiplexed front-end. Use Value: 12-bit resolution and ±1.0 LSB offset error enable 0.025% basic DCV accuracy; 2.7V–5.25V supply range accommodates alkaline and Li-ion battery chemistries. |
Use Scenario: DIN-rail mounted PLC analog input module monitoring 8 thermocouple or 4–20mA loop signals in factory automation. IC Role / Device Role / Timing Role: Isolated channel ADC converting conditioned industrial signals with cold-junction compensation and linearization. Use Value: Software-configurable bipolar input mode supports ±10V and ±5V industrial standards; REFADJ trimming compensates for sensor drift over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multi-channel, serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7841IPW | 12-bit, 4-channel, SPI-only interface; requires external reference; 100ksps max; no SHDN pin - uses CS-driven sleep mode. | Lacks 8-channel count and SSTRB strobe; lower sampling rate limits high-speed transient capture. | Choose for cost-sensitive, space-constrained designs where 4 channels suffice and TMS320 sync is unnecessary. |
| MAX11131ETE+ | 12-bit, 8-channel, internal reference (2.048V); 1MSPS; SPI/QSPI only; 2.7V–3.6V supply - no 5.25V support. | Higher speed but narrower supply range; internal reference eliminates external component but reduces flexibility. | Choose when system operates strictly at 3.3V and requires faster sampling; avoid if 5V compatibility or external reference calibration is needed. |
Compared with MAX147CEAP+T, ADS7841IPW offers lower cost and smaller TSSOP-16 package but sacrifices channel count and strobe synchronization; MAX11131ETE+ provides higher throughput and integrated reference yet lacks the wide supply range and REFADJ trim capability essential for field-deployed instrumentation.
Availability
MAX147CEAP+T is available at Aetrix Electronics and suitable for portable data logging, battery-powered medical instruments, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX147CEAP+T 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 high-performance analog and mixed-signal ICs for demanding applications in industrial, medical, and communications markets.
The MAX146/MAX147 product line was engineered for low-power, multi-channel data acquisition in portable and battery-operated systems - emphasizing flexible input configuration, minimal external components, and robust serial interfacing.
FAQ
What is the operating temperature range for MAX147CEAP+T?
The MAX147CEAP+T is specified for 0°C to +70°C ambient operation (Commercial grade), as indicated by the 'C' suffix in the part number. This range is validated across all key parameters including INL, offset error, and reference stability - ensuring reliable performance in indoor portable equipment and non-automotive industrial enclosures.
Does MAX147CEAP+T include an internal voltage reference?
No, MAX147CEAP+T requires an external 2.500V reference applied to the VREF pin. Unlike the MAX146 variant, the MAX147 does not integrate an internal reference; its reference buffer must be disabled by connecting REFADJ to VDD, making external reference selection critical for absolute accuracy.
How is the MAX147CEAP+T powered down to minimize current draw?
MAX147CEAP+T supports three power-down methods: hardware shutdown via SHDN pin pulled low (1µA), software-controlled fast power-down using PD1/PD0 bits in the control byte (54µA at 1ksps), or full power-down (1µA). All modes retain register state and resume operation within microseconds upon CS assertion or SHDN release.
Can MAX147CEAP+T perform differential measurements across arbitrary channel pairs?
No - MAX147CEAP+T supports only four predefined differential pairs: CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. The internal multiplexer architecture does not allow cross-pair differential configurations (e.g., CH0/CH3); channel selection is strictly governed by SEL2–SEL0 bits in Tables 2 and 3 of the datasheet.
What is the maximum recommended source impedance for analog inputs on MAX147CEAP+T?
The MAX147CEAP+T specifies a maximum acquisition time of 1.5µs for source impedances ≤1kΩ. For higher impedances, acquisition time increases per tACQ = 9 × (RS + 9kΩ) × 16pF; above 1kΩ, a 0.01µF capacitor must be placed at each CHx pin to maintain accuracy - otherwise, T/H droop degrades effective resolution.
MAX147CEAP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 4, 8
- 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 ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX147CEAP+T FAQ
1.How can I place an order for MAX147CEAP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX147CEAP+T 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 MAX147CEAP+T reliable?
The price and inventory of MAX147CEAP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX147CEAP+T is usually 5 days.
3.What payment methods are accepted for MAX147CEAP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX147CEAP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX147CEAP+T?
MAX147CEAP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX147CEAP+T 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 MAX147CEAP+T?
For technical support, including MAX147CEAP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX147CEAP+T requirements.
6.How does Aetrix verify that MAX147CEAP+T is sourced from the original manufacturer or authorized distributors?
All MAX147CEAP+T 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 MAX147CEAP+T meets industry standards.
7.What is the process for return or replacement of MAX147CEAP+T?
All MAX147CEAP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX147CEAP+T, 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 MAX147CEAP+T part is unused and in its original packaging.
Return procedure for MAX147CEAP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX147CEAP+T 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…
