My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX146BEAP/GH9
- Part No.:
- MAX146BEAP/GH9
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX146BEAP/GH9.pdf
- Description:
- 8-CHANNEL, SERIAL 12-BIT ADCS
- Quantity:
- Payment:
- Shipping:
Inventory:3,234
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX146BEAP/GH9 from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) with integrated track/hold, software-configurable unipolar/bipolar and single-ended/differential inputs, internal 2.5V reference, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. It operates from a single +2.7V to +3.6V supply and achieves 133ksps conversion rate with 1.2mA supply current at 3V - optimized for portable data logging and battery-powered instrumentation.
For engineers reviewing the MAX146BEAP/GH9 datasheet, MAX146BEAP/GH9 pinout, MAX146BEAP/GH9 application, or MAX146BEAP/GH9 equivalent, key selection criteria include its internal reference accuracy (±0.5% initial, ±30ppm/°C drift), low-power shutdown mode (1µA), 20-pin SSOP package, and compatibility with TMS320-family DSPs via SSTRB strobe output.
Technical Context
The MAX146BEAP/GH9 implements successive-approximation (SAR) architecture with an on-chip track/hold circuit acquiring input signals in ≤1.5µs. Its analog front-end supports pseudo-differential sampling: in single-ended mode, IN+ connects to CH0–CH7 and IN− to COM; in differential mode, IN+/IN− are selected from CH0/CH1, CH2/CH3, CH4/CH5, or CH6/CH7 pairs.
Conversion timing is governed by either internal clock or external SCLK (up to 2MHz); control byte (8-bit) configures channel, polarity, input type, and power mode. The device features three-level SHDN pin (low = full shutdown, high = internal compensation, float = external compensation) and automatic power-down after conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes over full-scale range |
| Sampling Rate | 133ksps - supports real-time acquisition of signals up to ~65kHz bandwidth (Nyquist-limited) |
| INL | ±0.5 LSB - ensures monotonicity and <0.012% full-scale linearity error |
| VREF Output | 2.500V ±20mV (TYP) - stable internal reference with ±1.5% adjustment range via REFADJ |
| Supply Current | 1.2mA @133ksps / 54µA @1ksps / 1µA in shutdown - enables adaptive power management |
| Input Configuration | 8-channel single-ended OR 4-channel differential - selectable per conversion via control byte |
| Serial Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire - no level-shifting or glue logic required |
Pinout & Package
The MAX146BEAP/GH9 is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, JEDEC MO-153 compliant, and rated for 0°C to +70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Eight single-ended inputs; configurable as four differential pairs (CH0/CH1, etc.) |
| COM (Pin 9) | Analog common reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5LSB |
| SHDN (Pin 10) | Three-state shutdown control | Low = full shutdown (1µA); high = internal compensation; float = external compensation |
| VREF (Pin 11) | Reference buffer output / ADC reference input | 2.500V nominal output (MAX146 only); adjustable ±1.5% via REFADJ |
| REFADJ (Pin 12) | Reference buffer adjustment input | Tie to VDD to disable internal reference; connect capacitor for external compensation |
| DIN (Pin 17) | Serial data input | Accepts 8-bit control byte on SCLK rising edge; defines channel, mode, and clock source |
| SCLK (Pin 19) | Serial clock input | Drives data transfer and (in external mode) conversion timing; 40–60% duty cycle required |
| CS (Pin 18) | Active-low chip select | Enables serial interface; DOUT and SSTRB go high-Z when CS = high |
| DOUT (Pin 15) | Serial data output | 12-bit result shifted MSB-first on SCLK falling edge; high-Z when CS = high |
| SSTRB (Pin 16) | Serial strobe output | Pulses high one SCLK period before MSB in external mode; indicates conversion start/end in internal mode |
| AGND (Pin 13), DGND (Pin 14) | Analog and digital ground | Separate grounds minimize noise coupling; require low-impedance connection to system ground plane |
| VDD (Pin 20) | Positive supply | +2.7V to +3.6V single supply; powers analog and digital sections |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2.5V reference with ±1.5% adjustability | Eliminates need for external reference IC and reduces BOM count in space-constrained designs |
| Software-configurable unipolar/bipolar and single-ended/differential inputs | Enables dynamic reconfiguration per conversion without hardware changes or multiplexer ICs |
| 1.5µs track/hold acquisition time | Supports accurate sampling of fast transients and allows use with moderate-source-impedance sensors (≤1kΩ) |
| Three-level SHDN pin with auto-power-down capability | Reduces average supply current to <60µA at reduced sampling rates - critical for battery life extension |
| SPI/QSPI/MICROWIRE/TMS320-compatible interface | Direct connection to microcontrollers and DSPs without protocol translation or external logic |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered handheld logger recording temperature, pressure, and ECG waveforms over hours. IC Role / Device Role / Timing Role: Primary ADC capturing multi-sensor analog data with configurable input ranges and low quiescent current between samples. Use Value: Internal 2.5V reference and 1µA shutdown current extend battery life; 8-channel mux reduces external component count. | Use Scenario: Portable blood glucose meter requiring precise analog measurement of electrochemical sensor output. IC Role / Device Role / Timing Role: High-accuracy 12-bit digitizer interfacing with low-level analog biosensors in single-ended unipolar mode. Use Value: ±0.5 LSB INL and ±0.5 LSB offset error ensure clinical-grade measurement repeatability without factory calibration. |
| Battery-Powered Test Equipment | Industrial Process Monitoring |
Use Scenario: Handheld multimeter with autoranging and dual-display capability operating from two AA cells. IC Role / Device Role / Timing Role: Core ADC providing flexible input scaling (bipolar ±1.25V or unipolar 0–2.5V) and fast 133ksps sampling for AC/DC measurements. Use Value: 2.25MHz small-signal bandwidth enables true RMS calculation and harmonic analysis up to 50kHz. | Use Scenario: DIN-rail mounted sensor node measuring 4–20mA loop outputs, thermocouples, and RTDs in factory automation. IC Role / Device Role / Timing Role: Multi-channel acquisition front-end supporting differential inputs to reject common-mode noise in electrically noisy environments. Use Value: Channel-to-channel offset matching <±0.25 LSB and gain matching <±0.5 LSB ensure consistent cross-channel readings. |
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, SPI-only interface, no internal reference, requires external 2.5V ref | Higher speed but lacks bipolar mode and integrated reference - needs additional components | Select when maximum throughput >133ksps is required and board space allows external reference |
| MAX11131AUT+ | 12-bit, 500ksps, internal reference (2.048V), 10-pin µDFN, SPI-only, no SSTRB output | Smaller package and higher speed, but missing TMS320 strobe and 3-level SHDN functionality | Select for ultra-compact, high-density layouts where DSP strobe synchronization is not needed |
Compared with ADS7822U and MAX11131AUT+, the MAX146BEAP/GH9 uniquely combines internal 2.5V reference, bipolar input support, SSTRB strobe for TMS320 sync, and three-level shutdown - making it optimal for portable, low-power, multi-mode data acquisition where BOM simplification and DSP integration are priorities.
Availability
MAX146BEAP/GH9 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 industrial availability.
Supply support for MAX146BEAP/GH9 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX146BEAP/GH9 belongs to Maxim's precision data-acquisition product line, designed specifically for low-power, multi-channel, single-supply systems where integration of reference, track/hold, and serial interface reduces design complexity and PCB area.
FAQ
What is the operating temperature range for the MAX146BEAP/GH9?
The MAX146BEAP/GH9 is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade rating aligns with its 20-pin SSOP packaging and target applications in portable and industrial instrumentation where extended temperature performance is not required. The device's internal reference exhibits ±30ppm/°C drift over this range, ensuring stable accuracy without external calibration.
Does the MAX146BEAP/GH9 require an external reference voltage?
No, the MAX146BEAP/GH9 includes an integrated 2.5V reference buffer that provides a nominal 2.500V output with ±20mV initial tolerance and ±1.5% adjustment range via the REFADJ pin. Unlike the MAX147 variant, the MAX146BEAP/GH9 does not require an external reference - simplifying design and reducing component count in space-constrained applications.
How does the SHDN pin function on the MAX146BEAP/GH9?
The SHDN pin on the MAX146BEAP/GH9 supports three distinct states: pulled low disables all circuitry (1µA shutdown current), pulled high enables internal compensation mode for the reference buffer, and left floating selects external compensation mode. This three-level control eliminates the need for additional GPIO lines or configuration registers to manage power and reference stability.
Can the MAX146BEAP/GH9 perform differential measurements?
Yes, the MAX146BEAP/GH9 supports true pseudo-differential measurements across four channel pairs: CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. In differential mode, the device samples the voltage difference between the selected pair while maintaining high common-mode rejection - validated by channel-to-channel crosstalk of –88dB and offset matching of ±0.25 LSB.
What serial interface protocols is the MAX146BEAP/GH9 compatible with?
The MAX146BEAP/GH9 is natively compatible with SPI, QSPI, and MICROWIRE protocols using its 4-wire interface (DIN, DOUT, SCLK, CS), and additionally supports direct connection to TMS320-family DSPs via the SSTRB strobe output. No external logic or level shifters are required - enabling plug-and-play integration with common microcontrollers and signal processors.
MAX146BEAP/GH9 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- 4-Wire Serial, DSP, Microwire, QSPI, 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX146BEAP/GH9 FAQ
1.How can I place an order for MAX146BEAP/GH9 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX146BEAP/GH9 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 MAX146BEAP/GH9 reliable?
The price and inventory of MAX146BEAP/GH9 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX146BEAP/GH9 is usually 5 days.
3.What payment methods are accepted for MAX146BEAP/GH9?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX146BEAP/GH9 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX146BEAP/GH9?
MAX146BEAP/GH9 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX146BEAP/GH9 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 MAX146BEAP/GH9?
For technical support, including MAX146BEAP/GH9 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX146BEAP/GH9 requirements.
6.How does Aetrix verify that MAX146BEAP/GH9 is sourced from the original manufacturer or authorized distributors?
All MAX146BEAP/GH9 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 MAX146BEAP/GH9 meets industry standards.
7.What is the process for return or replacement of MAX146BEAP/GH9?
All MAX146BEAP/GH9 units undergo pre-shipment inspection (PSI). If there is an issue with MAX146BEAP/GH9, 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 MAX146BEAP/GH9 part is unused and in its original packaging.
Return procedure for MAX146BEAP/GH9:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX146BEAP/GH9 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…
