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Analog Devices Inc./Maxim Integrated MAX1146BCUP+
- Part No.:
- MAX1146BCUP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1146BCUP+.pdf
- Description:
- IC ADC 14BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,302
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Product details
Overview
MAX1146BCUP+ from Maxim Integrated is a 14-bit, 4-channel single-ended or 2-channel differential analog-to-digital converter with internal track/hold, +4.096V reference, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates from a single +4.75V to +5.25V supply, achieves 116ksps throughput, and consumes only 1.1mA at full speed-designed for precision data acquisition in battery-powered medical instruments and portable data loggers.
For engineers reviewing the MAX1146BCUP+ datasheet, MAX1146BCUP+ pinout, MAX1146BCUP+ application, or MAX1146BCUP+ equivalent, key selection considerations include its true-differential input architecture, software-configurable unipolar/bipolar mode, fast power-down capability (120µA), and 20-pin TSSOP package with validated 20-pin pinout and channel-multiplexed analog input mapping.
Technical Context
The MAX1146BCUP+ employs successive-approximation register (SAR) architecture with integrated track-and-hold and internal voltage reference. Its analog front-end supports configurable single-ended or differential inputs via software-controlled channel selection (CH0–CH3), with COM pin defining common-mode reference for bipolar/unipolar operation.
Conversion timing is synchronized either by internal 2.1MHz clock or external serial clock up to 2.1MHz; each conversion requires 18 SCLK cycles in external mode or fixed 6–8µs in internal mode. The device features hardware shutdown (SHDN) and two software power-down modes-fast (120µA) and full (300nA)-with automatic wake-on-serial-access.
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. |
| Throughput Rate | 116ksps - supports real-time sampling of dynamic signals such as ECG waveforms or sensor transients. |
| INL (Integral Nonlinearity) | ±2 LSB - ensures monotonicity and <0.012% full-scale error across temperature, critical for calibration-sensitive systems. |
| Supply Voltage Range | +4.75V to +5.25V - compatible with standard 5V logic rails and industrial power supplies without regulation overhead. |
| Internal Reference | +4.096V - enables exact 1mV/LSB scaling (4.096V ÷ 2¹⁴) for simplified firmware math and direct voltage interpretation. |
| Power Consumption | 1.1mA @ 116ksps, 120µA in fast power-down - extends battery life in portable instruments between active sampling intervals. |
| SINAD | 77dB (typ) - supports >12.5 effective number of bits (ENOB) for accurate digitization of low-noise analog sources. |
Pinout & Package
MAX1146BCUP+ is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP), thermally enhanced for compact PCB layouts and compatible with standard surface-mount assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog Input Channels | Software-selectable single-ended inputs (vs. COM) or differential pairs (e.g., CH0/CH1); supports 4 SE or 2 diff configurations. |
| COM | Common Input Reference | Sets zero-code point: AGND for unipolar (0 to VREF), VREF/2 for bipolar (±VREF/2); defines differential negative input path. |
| REF | Reference Buffer Output / ADC Reference Input | Provides stable +4.096V internal reference; accepts external 1.5V–VDD reference if REFADJ tied to VDD. |
| REFADJ | Bandgap Reference Output / Reference Buffer Input | Bypassed to AGND with 0.01µF; tie to VDD to disable internal reference and use external source. |
| SHDN | Active-Low Hardware Shutdown | Pulling low reduces supply current to ≤0.3µA; complements software power-down for ultra-low-power system sleep states. |
| DIN/DOUT/SCLK/CS/SSTRB | Serial Interface Signals | Full SPI-compatible 4-wire interface; SSTRB provides precise conversion timing strobe for DSP synchronization. |
| AGND/DGND | Analog & Digital Grounds | Separate ground pins minimize digital noise coupling into analog conversion path-mandatory for <±2 LSB INL performance. |
Key Features
| Feature | Design Value |
|---|---|
| True-differential input architecture | Enables rejection of common-mode noise in noisy industrial environments without external instrumentation amplifiers. |
| Configurable unipolar/bipolar & single-ended/differential modes | Single control byte selects operating mode per conversion-eliminates need for external signal conditioning reconfiguration. |
| Internal +4.096V reference with ±50ppm/°C tempco (BC grade) | Removes external reference IC and trimming components; supports 1mV/LSB scaling with <±2 LSB total error over 0°C to +70°C. |
| 18-cycle external clock conversion (116ksps) | Guarantees deterministic latency for time-critical closed-loop control applications using FPGA or real-time MCU interfaces. |
| Automatic wake-on-serial-access | Eliminates manual power-state coordination in firmware-device powers up within microseconds when CS falls, reducing software overhead. |
Applications
| Portable Medical Monitoring | Battery-Powered Data Logging |
|---|---|
Use Scenario: Continuous acquisition of low-amplitude biopotential signals (e.g., ECG, EMG) in handheld diagnostic devices with limited battery capacity. IC Role / Device Role / Timing Role: Primary SAR ADC performing synchronized 14-bit sampling at 1–10ksps with programmable gain and bipolar input range. Use Value: Internal +4.096V reference and 120µA fast power-down enable >100-hour battery life while maintaining <±2 LSB linearity across clinical temperature range. |
Use Scenario: Field-deployed environmental sensors logging temperature, pressure, and humidity over weeks on AA batteries. IC Role / Device Role / Timing Role: Multichannel ADC interfacing with multiple transducers via software-configurable input mux and COM-referenced differential sensing. Use Value: 4-channel SE / 2-channel diff support reduces external multiplexer count; 300nA full power-down minimizes quiescent drain during idle intervals. |
| Industrial Process Control | Lab-Grade Test Equipment |
Use Scenario: Analog input module in PLC I/O racks measuring 4–20mA current loops and thermocouple outputs in factory automation. IC Role / Device Role / Timing Role: Precision ADC with channel-to-channel gain matching (±1 LSB) and offset matching (±1 LSB) for multi-sensor correlation. Use Value: Matched channels eliminate per-channel calibration; separate AGND/DGND pins suppress noise from switching power supplies in dense rack environments. |
Use Scenario: Benchtop multimeter or oscilloscope front-end requiring high DC accuracy and low THD for metrology-grade measurements. IC Role / Device Role / Timing Role: High-linearity ADC with 77dB SINAD and -96dB THD supporting 12.5+ ENOB at 1kHz input. Use Value: Internal track/hold and 3.0MHz small-signal bandwidth allow accurate capture of fast transients without external sample-hold circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit resolution, 500ksps, +3.3V supply only, no internal reference | Higher resolution/speed but requires external reference and level-shifting for 5V systems | Select for higher ENOB (>13.5) and faster sampling where board space allows external reference design. |
| AD7949BCPZ-RL7 | 14-bit, 8-channel SE / 4-channel diff, +2.3V to +5.5V supply, +2.5V internal ref | Wider supply range and more channels, but ±3 LSB INL and no SSTRB strobe output | Select when needing 8-channel SE support and flexible supply; avoid when SSTRB timing sync or <±2 LSB INL is mandatory. |
Compared with ADS8684IPWR and AD7949BCPZ-RL7, the MAX1146BCUP+ offers tighter INL (±2 LSB), integrated +4.096V reference enabling 1mV/LSB scaling, and SSTRB strobe for deterministic DSP synchronization-making it optimal for cost-sensitive, battery-operated 4-channel precision systems requiring minimal external components.
Availability
MAX1146BCUP+ is available at Aetrix Electronics and suitable for portable medical monitoring, battery-powered data logging, and industrial process control requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX1146BCUP+ 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 MAX1146BCUP+ belongs to Maxim's high-accuracy SAR ADC family targeting low-power, multichannel data acquisition-engineered for systems where integration, reference stability, and deterministic serial timing outweigh raw speed requirements.
FAQ
What is the operating temperature range for the MAX1146BCUP+?
The MAX1146BCUP+ is specified for operation from 0°C to +70°C (Commercial grade). This range is confirmed in the Ordering Information table and supported by electrical characteristics tested across TMIN to TMAX, including INL ±2 LSB, reference stability, and power consumption metrics-all validated within this ambient temperature window.
Does the MAX1146BCUP+ require an external reference, or does it have an internal one?
The MAX1146BCUP+ includes an internal +4.096V reference, eliminating the need for an external reference in most applications. The REF pin outputs this voltage, and REFADJ can be bypassed to AGND with 0.01µF to stabilize it. External references from 1.5V to VDD are supported only when REFADJ is tied to VDD to disable the internal bandgap.
How many analog input channels does the MAX1146BCUP+ support, and what configurations are available?
The MAX1146BCUP+ supports 4 single-ended inputs (CH0–CH3) or 2 true-differential pairs (e.g., CH0/CH1, CH2/CH3), selected via software control bits SGL/DIF and UNI/BIP in the 8-bit command byte. This configuration is explicitly defined in the Features section and Pin Description table for MAX1146/MAX1147 variants.
What serial interface protocols is the MAX1146BCUP+ compatible with?
The MAX1146BCUP+ features a 4-wire SPI-compatible serial interface that connects directly to SPI™, QSPI™, and MICROWIRE™ controllers without external logic. Signal names (DIN, DOUT, SCLK, CS) and timing (SCLK edge-triggered, CS-active-low) conform to these standards, and SSTRB provides additional strobe synchronization for DSP interfacing.
What power-saving modes does the MAX1146BCUP+ offer, and how do they affect wake-up time?
The MAX1146BCUP+ provides hardware shutdown (SHDN low → ≤0.3µA) and two software power-down modes: fast (120µA) and full (300nA). Wake-up is automatic on CS fall or serial access, with quick turn-on enabling power-down between every conversion at 116ksps-verified in Electrical Characteristics under "Supply Current" vs. conversion rate plots.
MAX1146BCUP+ 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1146BCUP+ FAQ
1.How can I place an order for MAX1146BCUP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1146BCUP+ 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 MAX1146BCUP+ reliable?
The price and inventory of MAX1146BCUP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1146BCUP+ is usually 5 days.
3.What payment methods are accepted for MAX1146BCUP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1146BCUP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1146BCUP+?
MAX1146BCUP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1146BCUP+ 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 MAX1146BCUP+?
For technical support, including MAX1146BCUP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1146BCUP+ requirements.
6.How does Aetrix verify that MAX1146BCUP+ is sourced from the original manufacturer or authorized distributors?
All MAX1146BCUP+ 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 MAX1146BCUP+ meets industry standards.
7.What is the process for return or replacement of MAX1146BCUP+?
All MAX1146BCUP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1146BCUP+, 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 MAX1146BCUP+ part is unused and in its original packaging.
Return procedure for MAX1146BCUP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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