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Analog Devices Inc./Maxim Integrated MAX1147BCUP+
- Part No.:
- MAX1147BCUP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1147BCUP+.pdf
- Description:
- IC ADC 14BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:109
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Product details
Overview
MAX1147BCUP+ from Maxim Integrated is a 14-bit, 4-channel single-ended or 2-channel differential analog-to-digital converter (ADC) with integrated track/hold, internal +2.500V reference, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates from a single +2.7V to +3.6V supply, consumes only 1.1mA at 116ksps, and supports software-configurable unipolar/bipolar input modes - ideal for battery-powered medical instruments and portable data loggers.
For engineers reviewing the MAX1147BCUP+ datasheet, MAX1147BCUP+ pinout, MAX1147BCUP+ application, or MAX1147BCUP+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain-ready availability details - all grounded in Maxim's official specifications for the BC-grade 20-pin TSSOP variant.
Technical Context
The MAX1147BCUP+ employs successive-approximation architecture with true-differential analog input circuitry, including an internal multiplexer, dual track/hold capacitors (CT/H+, CT/H−), and switched-capacitor DACs. Its flexible control byte (8-bit) configures channel selection, single-ended/differential mode, unipolar/bipolar range, and clock/power-down state - enabling precise per-conversion setup without register writes.
It supports two clocking modes: internal 2.1MHz oscillator (6–8µs conversion time) or external SCLK up to 2.1MHz (116ksps throughput). The SSTRB strobe synchronizes DSP timing - active-low pulse in internal mode, high-pulse before MSB in external mode - while hardware shutdown (SHDN) and two software power-down modes reduce current to 300nA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes for high-precision measurement of small-signal variations in sensor or instrumentation circuits. |
| Sampling Rate | 116ksps (external clock) - supports real-time capture of signals up to ~2MHz full-power bandwidth, suitable for transient event logging in industrial monitoring. |
| Supply Voltage | +2.7V to +3.6V - enables direct integration into 3.3V systems without level-shifting, reducing BOM count in portable and low-voltage embedded designs. |
| Internal Reference | +2.500V ±20mV (0°C to +70°C) - provides stable scaling for ADC conversions without external reference IC, simplifying layout and improving system accuracy over temperature. |
| INL / DNL | ±2 LSB INL, ±0.5 LSB DNL - ensures monotonicity and <0.012% full-scale error, critical for closed-loop control and calibration-sensitive applications like medical diagnostics. |
| Power Consumption | 1.1mA @ 116ksps, 120µA @ 10ksps, 300nA in full power-down - extends battery life in handheld devices by enabling adaptive sampling rate and deep sleep between measurements. |
| Input Configuration | 4 single-ended or 2 differential channels - allows simultaneous acquisition from multiple sensors (e.g., thermocouples + RTDs) with common-mode rejection in noisy environments. |
Pinout & Package
MAX1147BCUP+ is housed in a 20-pin thin shrink small-outline package (TSSOP), pin-compatible across the MAX1146–MAX1149 family. Thermal pad is not present; standard 20-TSSOP footprint applies (JEDEC MO-153, 4.4mm × 6.5mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog Input Channels | Four dedicated single-ended inputs; configurable as two differential pairs (e.g., CH0–CH1, CH2–CH3) for noise-immune signal acquisition. |
| COM | Common Input Reference | Sets zero-code voltage: AGND for unipolar mode (0 to +2.5V), VREF/2 = +1.25V for bipolar mode (±1.25V), enabling flexible sensor interfacing. |
| SHDN | Active-Low Hardware Shutdown | Pulling low reduces supply current to ≤0.3µA; automatic wake-up occurs on CS assertion - eliminates need for external reset sequencing. |
| REF | Reference Buffer Output / ADC Reference Input | Provides regulated +2.500V output (2.2µF bypass required); accepts external 1.5V–VDD references for custom full-scale ranges. |
| DOUT / SSTRB / DIN / SCLK / CS | 4-Wire SPI-Compatible Serial Interface | Direct connection to microcontroller SPI peripherals without glue logic; SSTRB enables precise timing alignment with DSP interrupt handling. |
| AGND / DGND | Analog & Digital Ground Returns | Separate ground pins minimize digital switching noise coupling into sensitive analog front-end - requires star grounding at single-point PCB location. |
Key Features
| Feature | Design Value |
|---|---|
| True-Differential Input Architecture | Simultaneous sampling on IN+/IN− with matched T/H paths eliminates skew-induced errors, enabling accurate phase-sensitive measurements in motor control feedback loops. |
| Configurable Input Modes | Software-selectable unipolar/bipolar and single-ended/differential via 8-bit control byte - eliminates hardware jumpers and supports runtime reconfiguration in firmware. |
| Low-Power Adaptive Operation | Three operational states (normal, fast power-down, full power-down) controlled per-conversion - reduces average current in duty-cycled sensing nodes without sacrificing latency. |
| Integrated Reference Buffer | 2.0V/V gain buffer on REFADJ pin allows fine-tuning of reference voltage (±18mV adjustment range) to compensate for system-level gain errors or sensor offset. |
| Anti-Aliasing Ready Input Bandwidth | 3.0MHz small-signal bandwidth supports undersampling of RF or ultrasonic signals; combined with 116ksps sampling, enables cost-effective wideband spectrum analysis. |
Applications
| Portable ECG Monitor | Battery-Powered Environmental Sensor Node |
|---|---|
Use Scenario: Continuous acquisition of low-amplitude biopotential signals (0.5–5mV) from dry electrodes under motion artifacts. IC Role / Device Role / Timing Role: Primary ADC capturing differential lead-II ECG waveform at 116ksps with 14-bit resolution and 77dB SINAD, synchronized to MCU via SSTRB for real-time R-peak detection. Use Value: Internal +2.500V reference and matched T/H ensure baseline stability across temperature shifts; 120µA low-power mode extends 24-hour operation on a 500mAh Li-ion cell. |
Use Scenario: Simultaneous logging of temperature (RTD), humidity (capacitive), and CO₂ (NDIR) in remote field deployments. IC Role / Device Role / Timing Role: Multichannel ADC digitizing four sensor outputs with software-configured gain and polarity - CH0/CH1 for RTD bridge, CH2/CH3 for ratiometric humidity sensing. Use Value: 4-channel SE/2-channel diff capability eliminates need for external multiplexers; 2.7–3.6V supply range matches buck-boost regulator output, minimizing power loss. |
| Industrial Process Controller I/O Module | Handheld Calibration Tester |
Use Scenario: High-accuracy analog input for PLC analog input cards measuring 4–20mA loop signals and thermocouple outputs. IC Role / Device Role / Timing Role: Precision ADC providing ±2 LSB INL and channel-to-channel gain matching ≤±1 LSB - critical for multi-channel synchronization in distributed I/O systems. Use Value: Internal reference eliminates external reference drift; separate AGND/DGND pins suppress noise from adjacent digital isolators and relay drivers on same PCB. |
Use Scenario: Field-portable instrument verifying sensor transmitter accuracy against NIST-traceable standards. IC Role / Device Role / Timing Role: ADC core in self-contained tester generating known mV/mA stimuli and measuring return signals with 14-bit linearity and <0.012% FS error. Use Value: Full power-down mode (300nA) preserves battery charge during standby; SPI interface enables rapid firmware updates and calibration coefficient loading via USB-to-SPI adapter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel, low-power, 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325IPW | 16-bit resolution, 100ksps, SPI interface, no internal reference - requires external 2.5V reference and external T/H. | Higher resolution but lower speed and greater external component count; lacks integrated reference and power-down modes. | Select when absolute precision >16 bits is required and board space allows external support components. |
| AD7923BRUZ | 12-bit resolution, 1MSPS, 4-channel SE/2-channel diff, internal reference (+2.5V), 2.7–5.25V supply - no bipolar mode support. | Faster sampling but lower resolution and fixed unipolar-only input range limits use with AC-coupled or bipolar sensors. | Select when high-speed acquisition of unipolar signals dominates, and 12-bit resolution suffices for cost-sensitive volume production. |
Compared with MAX1147BCUP+, ADS8325IPW offers higher resolution at lower speed and increased system complexity, while AD7923BRUZ trades resolution for speed and removes bipolar configuration flexibility - making MAX1147BCUP+ optimal for balanced precision, configurability, and low-power portability.
Availability
MAX1147BCUP+ is available at Aetrix Electronics and suitable for portable data logging, battery-powered medical instruments, and industrial process control requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1147BCUP+ 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 MAX1146–MAX1149 product line targets portable and low-power measurement systems requiring integrated signal conditioning, high-resolution conversion, and minimal external components - emphasizing ease of use, thermal stability, and robust serial interfacing.
FAQ
What is the operating temperature range for the MAX1147BCUP+?
The MAX1147BCUP+ is specified for 0°C to +70°C ambient operation (indicated by the 'BC' suffix). This commercial-grade temperature range aligns with applications such as handheld test equipment and non-automotive portable instrumentation where extended industrial (-40°C to +85°C) operation is not required. The device maintains ±2 LSB INL and full 14-bit performance across this range when powered from +2.7V to +3.6V.
Does the MAX1147BCUP+ support differential input mode, and how is it configured?
Yes, the MAX1147BCUP+ supports true differential input mode across two channel pairs: CH0–CH1 and CH2–CH3. Configuration is performed per conversion via the 8-bit control byte written to DIN - setting bit SGL/DIF = 0 selects differential mode, while SEL2–SEL0 define the active pair. This eliminates hardware reconfiguration and enables dynamic switching between single-ended and differential acquisition in firmware.
Can the internal +2.500V reference of the MAX1147BCUP+ be disabled or overridden?
Yes, the internal +2.500V reference can be disabled by pulling the REFADJ pin high (to VDD), which disables both the bandgap reference and reference buffer amplifier. This allows the MAX1147BCUP+ to accept an external reference voltage from 1.5V to VDD applied at the REF pin - supporting custom full-scale ranges (e.g., 3.0V for enhanced dynamic range with 3.3V systems) while maintaining specified INL and DNL performance.
How does the MAX1147BCUP+ achieve low power consumption during idle periods?
The MAX1147BCUP+ achieves ultra-low idle current through two software-controllable power-down modes: fast power-down (120µA) and full power-down (300nA), selected via PD1/PD0 bits in the control byte. In either mode, asserting CS automatically wakes the device and initiates conversion - eliminating wake-up latency penalties. This enables energy-proportional sampling in battery-operated systems without external enable circuitry.
Is the MAX1147BCUP+ pin-compatible with other devices in the MAX1146–MAX1149 family?
Yes, the MAX1147BCUP+ shares identical 20-pin TSSOP pinout and electrical interface with all MAX1146–MAX1149 variants, including MAX1146BCUP+, MAX1148BCUP+, and MAX1149BCUP+. This allows drop-in replacement across voltage (2.7–3.6V vs. 4.75–5.25V) and channel-count (4 vs. 8) variants - simplifying design reuse, inventory consolidation, and qualification testing across product families.
MAX1147BCUP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 116k
- 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, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1147BCUP+ FAQ
1.How can I place an order for MAX1147BCUP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1147BCUP+ 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 MAX1147BCUP+ reliable?
The price and inventory of MAX1147BCUP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1147BCUP+ is usually 5 days.
3.What payment methods are accepted for MAX1147BCUP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1147BCUP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1147BCUP+?
MAX1147BCUP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1147BCUP+ 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 MAX1147BCUP+?
For technical support, including MAX1147BCUP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1147BCUP+ requirements.
6.How does Aetrix verify that MAX1147BCUP+ is sourced from the original manufacturer or authorized distributors?
All MAX1147BCUP+ 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 MAX1147BCUP+ meets industry standards.
7.What is the process for return or replacement of MAX1147BCUP+?
All MAX1147BCUP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1147BCUP+, 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 MAX1147BCUP+ part is unused and in its original packaging.
Return procedure for MAX1147BCUP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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