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Analog Devices Inc./Maxim Integrated MAX1168BEEG+
- Part No.:
- MAX1168BEEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1168BEEG+.pdf
- Description:
- IC ADC 16BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:255
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Product details
Overview
The MAX1168BEEG+ from Maxim Integrated is an 8-channel, 16-bit, 200ksps successive-approximation ADC with integrated +4.096V reference, internal oscillator, AutoShutdown™, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates from a single +5V analog supply and supports digital logic levels from +2.7V to +5.5V. Designed for precision data acquisition in space-constrained industrial systems, it delivers ±3 LSB INL, 88.5dB SINAD, and 0.6µA shutdown current.
For engineers reviewing the MAX1168BEEG+ datasheet, MAX1168BEEG+ pinout, MAX1168BEEG+ application, or MAX1168BEEG+ equivalent, key selection considerations include its 24-pin QSOP package, -40°C to +85°C extended temperature rating, 8-bit/16-bit data-transfer mode select via DSEL, DSP frame-sync capability (DSPR/DSPX), and channel-to-channel isolation of 96dB - all critical for motor control and thermocouple measurement designs.
Technical Context
The MAX1168BEEG+ implements a capacitive successive-approximation architecture with internal track-and-hold (4MHz input bandwidth) and programmable scan mode for sequential or continuous single-channel conversion. Its dual-clock support-external SCLK up to 9MHz or internal 3.2–4.0MHz oscillator-enables flexible timing control across sampling rates from 1ksps to 200ksps.
Digital interface flexibility is central: SPI/QSPI/MICROWIRE mode uses CS/SCLK/DIN/DOUT/EOC, while DSP mode adds frame-sync initiation (DSPR) and notification (DSPX), with DSEL selecting 8-bit or 16-bit data-transfer width. Internal reference wake-up time is 5ms; external reference input range is +3.8V to AVDD − 0.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over full temperature range - guarantees monotonicity and full-scale linearity for precision sensor digitization. |
| Sampling Rate | Up to 200ksps with external clock - supports real-time capture of fast transients in motor control feedback loops. |
| INL | ±3 LSB max - ensures absolute accuracy ≤ ±0.045% FSR, critical for calibrated thermocouple or strain gauge measurements. |
| SINAD | 88.5 dB typical at 1kHz - enables >14.4 effective number of bits (ENOB) for high-fidelity signal reconstruction. |
| Supply Current | 3.6 mA at 200ksps (AVDD = DVDD = +5V), 185 µA at 10ksps - low power enables battery-backed or energy-harvested I/O modules. |
| Input Channels | 8 single-ended analog inputs (AIN0–AIN7) - eliminates need for external multiplexers in multi-sensor industrial I/O designs. |
| Reference | Integrated +4.096V (±25 ppm/°C TC) or external 3.8V–AVDD−0.2V - simplifies BOM and improves system-level accuracy without external reference ICs. |
Pinout & Package
MAX1168BEEG+ is housed in a 24-pin QSOP package (5.3mm × 7.6mm, 0.65mm pitch), optimized for high-density PCB layouts in industrial control modules and data-acquisition boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DOUT | Serial data output | MSB-first unipolar output; high-impedance when CS = high - enables bus sharing and reduces loading on host MCU SPI lines. |
| SCLK | Serial clock input | Drives conversion and clocks data; supports 9MHz external or internal 3.2–4.0MHz - allows synchronous timing with host processor or DSP. |
| DIN | Serial command input | Loads configuration register bits (channel select, mode, power-down) - enables runtime reconfiguration without hardware changes. |
| EOC | End-of-conversion flag | Active-low pulse in internal clock mode; remains high in external clock mode - provides deterministic interrupt signaling for firmware scheduling. |
| AIN0–AIN7 | Analog input channels | Eight single-ended inputs with 45pF input capacitance - compatible with buffered sensor outputs or RC-filtered industrial signals. |
| REF / REFCAP | Reference voltage node | Accepts external reference or hosts internal +4.096V ref; REFCAP requires 0.1µF bypass - ensures stable full-scale definition and minimizes noise coupling. |
| DSPR / DSPX | DSP frame-sync interface | DSPR initiates conversion on frame pulse; DSPX asserts MSB-ready flag - eliminates glue logic for TI C2000 or Analog Devices SHARC integration. |
| DSEL | Data-width select | Logic high = 16-bit transfer; low = 8-bit transfer - adapts to host MCU word width and reduces SPI transaction overhead in resource-limited systems. |
| CS | Chip-select input | Active-low enable; high = 0.6µA shutdown - supports rapid power gating between conversions to extend battery life. |
| AGND / DGND | Analog/digital ground | Separate star-ground pins minimize digital switching noise injection into sensitive analog front-end - essential for achieving 88.5dB SINAD. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ power management | Reduces current to 185µA at 10ksps and <10µA at lower rates - extends operational time in portable diagnostic tools and remote sensors. |
| DSP-initiated conversion support | DSPR/DSPX interface enables deterministic, low-latency synchronization with digital signal processors - eliminates polling and improves real-time control loop determinism. |
| Configurable data-transfer width | 8-bit or 16-bit mode selected by DSEL pin - matches legacy 8-bit microcontrollers or leverages full resolution on 16-bit MCUs without software bit-packing overhead. |
| Integrated reference with 5ms wake-up | +4.096V reference (±25ppm/°C) with dedicated REFCAP pin - removes external reference IC, saves board area, and maintains accuracy across -40°C to +85°C. |
| High channel isolation | 96dB channel-to-channel isolation at DC - prevents crosstalk between adjacent thermocouple or accelerometer inputs in dense multi-channel modules. |
Applications
| Motor Control Feedback | Industrial I/O Module |
|---|---|
|
Use Scenario: Real-time sampling of phase currents and rotor position signals in servo drives and BLDC inverters. IC Role / Device Role / Timing Role: 8-channel simultaneous-sampling-capable ADC digitizing analog feedback paths with 200ksps throughput and 729ns acquisition time. Use Value: Enables closed-loop current regulation with <1µs timing jitter, supporting field-oriented control (FOC) algorithms requiring precise current vector reconstruction. |
Use Scenario: Modular analog input card for PLC backplanes accepting 4–20mA, thermocouple, and RTD sensor inputs. IC Role / Device Role / Timing Role: Central 16-bit ADC with integrated reference and 8-channel MUX, interfacing to isolated signal conditioners via AGND/DGND separation. Use Value: Reduces component count by eliminating external reference and level-shifting circuitry, while maintaining ±3 LSB INL across -40°C to +85°C ambient. |
| Thermocouple Measurement | Accelerometer Data Acquisition |
|
Use Scenario: High-accuracy temperature monitoring in furnace controllers and HVAC zone sensors using Type K/J thermocouples. IC Role / Device Role / Timing Role: Precision ADC with cold-junction compensation support (via external sensor), 96dB channel isolation, and 88.5dB SINAD for low-noise mV-level signal digitization. Use Value: Achieves ±0.5°C system-level accuracy without calibration tables, leveraging ±3 LSB INL and 0.8 LSBRMS transition noise. |
Use Scenario: Vibration analysis in predictive maintenance edge nodes capturing wideband accelerometer outputs (up to 10kHz full-linear bandwidth). IC Role / Device Role / Timing Role: 16-bit ADC with 4MHz small-signal input bandwidth and undersampling capability for >10kHz mechanical resonance detection. Use Value: Captures transient shock events with 14.4 ENOB, enabling FFT-based spectral analysis without anti-aliasing filter design complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 8-channel, 16-bit SAR ADC with ±10.24V input range, integrated PGA (gain 1–128), and 500ksps max rate - no internal reference; requires external +4.096V ref. | Better suited for high-voltage industrial sensors (e.g., 0–10V process signals); lacks DSP frame-sync interface and AutoShutdown™. | Select when wider input range or programmable gain is required; avoid if reference integration or ultra-low standby power (<10µA) is mandatory. |
| AD7606BSTZ | 8-channel, 16-bit simultaneous-sampling SAR ADC with ±10V/±5V input, on-chip oscillator, and parallel/serial interface - no DSEL or DSPR/DSPX pins. | Designed for synchronized multi-axis motion control; higher power (21mW @ 200ksps) and larger 64-lead LQFP package. | Choose for true simultaneous sampling across all 8 channels; not suitable for space-constrained QSOP layouts or DSP-centric architectures. |
Compared with ADS8688IPWR and AD7606BSTZ, the MAX1168BEEG+ uniquely combines integrated reference, DSP frame-sync capability, and sub-1µA shutdown current in a compact 24-pin QSOP - making it optimal for cost-sensitive, size-constrained, and DSP-coupled industrial data acquisition where reference simplicity and ultra-low quiescent power are prioritized over simultaneous sampling or wide input range.
Availability
MAX1168BEEG+ is available at Aetrix Electronics and suitable for motor control systems, industrial I/O modules, and thermocouple measurement devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1168BEEG+ 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, automotive, and communications markets.
The MAX1168BEEG+ belongs to Maxim's precision data-acquisition ADC family, designed specifically for space- and power-constrained industrial control and sensor interface applications demanding 16-bit accuracy, integrated reference, and robust serial interfacing.
FAQ
What is the operating temperature range for the MAX1168BEEG+?
The MAX1168BEEG+ is rated for operation from -40°C to +85°C, meeting the extended industrial temperature specification. This range is confirmed in the Ordering Information table and validated across all electrical characteristics including INL (±3 LSB), SINAD (88.5 dB), and supply current performance - ensuring reliability in harsh factory-floor or outdoor equipment environments.
Does the MAX1168BEEG+ require an external reference voltage?
No, the MAX1168BEEG+ includes an integrated +4.096V reference with ±25 ppm/°C temperature coefficient and 5ms wake-up time. External reference is optional and supported within +3.8V to AVDD − 0.2V; however, using the internal reference eliminates BOM cost and layout area while maintaining ±3 LSB INL across temperature - a key advantage of the MAX1168BEEG+ over competing 16-bit ADCs.
How does the DSP interface work on the MAX1168BEEG+?
The MAX1168BEEG+ uses DSPR (frame-sync receive) to initiate conversions upon pulse assertion and DSPX (frame-sync transmit) to signal MSB availability at DOUT. In DSP mode, SCLK clocks data transfer while frame-sync handles event triggering - enabling tight synchronization with TI C2000 or ADI SHARC processors without external logic. This functionality is exclusive to the MAX1168BEEG+ and not present in the 4-channel MAX1167 variant.
What is the purpose of the DSEL pin on the MAX1168BEEG+?
The DSEL pin selects between 8-bit-wide and 16-bit-wide serial data-transfer modes: logic high enables 16-bit transfer (full resolution, 16 SCLK edges per conversion), while logic low enables 8-bit transfer (two-byte read, 8 SCLK edges per byte). This allows the MAX1168BEEG+ to interface efficiently with both 8-bit microcontrollers and 16-bit DSPs - a hardware-configurable feature not requiring register writes or firmware overhead.
Can the MAX1168BEEG+ operate with a digital supply voltage below +5V?
Yes, the MAX1168BEEG+ supports DVDD from +2.7V to +5.25V, enabling direct interfacing with low-voltage microcontrollers (e.g., 3.3V ARM Cortex-M series) without level shifters. Digital input thresholds scale with DVDD (VIH = 0.7×DVDD, VIL = 0.3×DVDD), and output drive strength is specified down to +2.7V - verified across all timing parameters including tDO (50ns), tDV (80ns), and tCSW (100ns).
MAX1168BEEG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 8
- Input Type:
- 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:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1168BEEG+ FAQ
1.How can I place an order for MAX1168BEEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1168BEEG+ 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 MAX1168BEEG+ reliable?
The price and inventory of MAX1168BEEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1168BEEG+ is usually 5 days.
3.What payment methods are accepted for MAX1168BEEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1168BEEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1168BEEG+?
MAX1168BEEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1168BEEG+ 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 MAX1168BEEG+?
For technical support, including MAX1168BEEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1168BEEG+ requirements.
6.How does Aetrix verify that MAX1168BEEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1168BEEG+ 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 MAX1168BEEG+ meets industry standards.
7.What is the process for return or replacement of MAX1168BEEG+?
All MAX1168BEEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1168BEEG+, 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 MAX1168BEEG+ part is unused and in its original packaging.
Return procedure for MAX1168BEEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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