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Analog Devices Inc./Maxim Integrated MAX1392ETB+
- Part No.:
- MAX1392ETB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX1392ETB+.pdf
- Description:
- 10-BIT, SAR ADC
- Quantity:
- Payment:
- Shipping:
Inventory:14,170
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Product details
Overview
The MAX1392ETB+ from Maxim Integrated is a micropower, 10-bit successive-approximation register (SAR) analog-to-digital converter with true-differential input, operating from +1.5V to +3.6V supply and achieving 357ksps throughput. It features ±0.5 LSB INL/DNL, 61dB SINAD at 85kHz, and AutoShutdown™ between conversions. Designed for ultra-low-power portable data acquisition, it supports unipolar (0 to VREF) or bipolar (±VREF/2) input modes via the UNI/BIP pin.
For engineers reviewing the MAX1392ETB+ datasheet, MAX1392ETB+ pinout, MAX1392ETB+ application, or MAX1392ETB+ equivalent, key selection considerations include its 10-pin TDFN package, external reference support (0.6V to VDD), SPI/QSPI/MICROWIRE-compatible 3-wire interface, and guaranteed performance over –40°C to +85°C.
Technical Context
The MAX1392ETB+ employs a track-and-hold circuit followed by a SAR architecture, with conversion initiated on the falling edge of CS and sampling completed on the third SCLK falling edge. Its differential input stage provides ±0.1 mV/V common-mode rejection and supports up to 4MHz full-power bandwidth.
It uses an external reference (0.6V to VDD), requires no internal reference, and delivers straight-binary output in unipolar mode or two's-complement in bipolar mode. Power-down current is <1µA, and acquisition time is fixed at 600ns minimum, independent of source impedance below 400Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete digital codes for precise signal digitization. |
| Throughput Rate | 357ksps - enables real-time sampling of signals up to ~178kHz Nyquist frequency. |
| INL / DNL | ±0.5 LSB - ensures monotonicity and ≤0.05% linearity error across full scale. |
| SINAD | 61dB at 85kHz - supports accurate measurement of medium-bandwidth sensor or audio signals. |
| Supply Voltage | +1.5V to +3.6V - compatible with single LiMnO₂ coin cells or two alkaline/NiMH cells without regulation. |
| Shutdown Current | <1µA - extends battery life in intermittent-sampling applications like portable dataloggers. |
| Reference Range | 0.6V to VDD - allows flexible scaling (e.g., 1.2V ref for low-noise 1.8V systems). |
Pinout & Package
The MAX1392ETB+ is housed in a 3mm × 3mm, 10-pin TDFN-EP package with exposed pad (not internally connected; recommended to tie to GND). Pin 1 is VDD; pin 4 is GND; pin 5 is REF; pin 6 is UNI/BIP (mode select); pin 7 is OE; pin 8 is CS; pin 9 is DOUT; pin 10 is SCLK; pins 2 and 3 are AIN− and AIN+, respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | Accepts 1.5V–3.6V; must be bypassed with 0.1µF capacitor near pin for noise immunity. |
| AIN− (Pin 2) | Negative differential analog input | Completes true-differential pair with AIN+; common-mode range 0 to VDD in bipolar mode. |
| AIN+ (Pin 3) | Positive differential analog input | Accepts signal relative to AIN−; supports unipolar (0 to VREF) or bipolar (±VREF/2) ranges. |
| GND (Pin 4) | Analog/digital ground reference | Single-point star ground connection required; ties to exposed pad for thermal/electrical stability. |
| REF (Pin 5) | External reference voltage input | Defines full-scale range; 0.6V–VDD + 0.05V; requires 0.1µF bypass to GND. |
| UNI/BIP (Pin 6) | Input mode select | High = unipolar (straight binary); low = bipolar (two's complement); must be stable before first SCLK. |
| OE (Pin 7) | Active-low output enable | Drives DOUT high-impedance when high; connect to CS for SPI/MICROWIRE compatibility. |
| CS (Pin 8) | Active-low chip select | Falling edge initiates power-up, acquisition, and conversion sequence; controls timing start. |
| DOUT (Pin 9) | Serial data output | MSB-first 10-bit result preceded by four zeros; transitions on SCLK falling edge. |
| SCLK (Pin 10) | Serial clock input | Drives conversion and data clocking; 0.1–5MHz range; 14 cycles needed for full 10-bit read. |
Key Features
| Feature | Design Value |
|---|---|
| True-differential input architecture | Rejects common-mode noise up to ±0.1 mV/V, enabling robust measurements in noisy industrial environments. |
| AutoShutdown™ between conversions | Reduces average current to 3.1µW at 1ksps (1.8V), optimizing battery runtime in sleep-wake sensor nodes. |
| SPI/QSPI/MICROWIRE/DSP compatibility | Eliminates need for protocol translation logic; supports CPOL/CPHA = 0/0 or 1/1 with minimal µC firmware changes. |
| Guaranteed no missing codes | Ensures deterministic behavior in closed-loop control systems where code gaps could cause instability. |
| –40°C to +85°C operation | Validated performance across industrial temperature range without derating or calibration compensation. |
Applications
| Portable Datalogging | Medical Instrumentation |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure over weeks on a single CR2032 coin cell. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from MEMS sensors; operates in unipolar mode with 1.2V external reference. Use Value: 0.27mW at 100ksps (1.8V) and <1µA shutdown current enable multi-week operation without DC-DC conversion. |
Use Scenario: Handheld ECG front-end acquiring lead-II differential biopotential signals with high CMRR requirement. IC Role / Device Role / Timing Role: True-differential SAR ADC capturing 250Hz–1kHz cardiac waveforms; configured in bipolar mode for AC-coupled input. Use Value: ±0.5 LSB INL and 61dB SINAD ensure diagnostic-grade fidelity; 4MHz full-power bandwidth supports anti-alias filtering design. |
| Battery-Powered Test Equipment | Industrial Process Monitoring |
|
Use Scenario: Pocket-sized multimeter measuring DC voltage, current, and resistance using auto-ranging analog front-end. IC Role / Device Role / Timing Role: Precision ADC interfacing with programmable gain amplifier and multiplexer; reference derived from precision bandgap. Use Value: External reference flexibility (0.6V–VDD) allows optimal SNR trade-off; 10-pin TDFN minimizes PCB area in space-constrained handheld housing. |
Use Scenario: DIN-rail mounted transmitter converting 4–20mA loop signals to digital output for PLC integration. IC Role / Device Role / Timing Role: Isolated analog input conditioner feeding true-differential ADC; operates from 3.3V local supply with 2.5V reference. Use Value: Guaranteed –40°C to +85°C performance and ±0.5 LSB DNL ensure repeatability in factory-floor conditions without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-pin SOIC; 2.7V–5.25V supply; no AutoShutdown; 200ksps max; internal reference only | Requires higher supply voltage and lacks low-power shutdown; unsuitable for sub-2V battery operation | Select MAX1392ETB+ for 1.5V operation, micropower shutdown, and true-differential input in space-constrained designs. |
| AD7476ARTZ-REEL7 | 6-pin SOT-23; 2.35V–5.25V supply; 1MSPS; no differential input; SPI-only interface | Higher speed but single-ended only; incompatible with bipolar signal conditioning or ultra-low-voltage systems | Choose MAX1392ETB+ when true-differential input, 1.5V compatibility, and configurable unipolar/bipolar mode are required. |
Compared with ADS7822U and AD7476ARTZ-REEL7, the MAX1392ETB+ uniquely combines true-differential input, 1.5V operation, AutoShutdown™, and external reference flexibility-making it the only option among the three qualified for coin-cell-powered, noise-immune, bipolar-range sensing.
Availability
The MAX1392ETB+ is available at Aetrix Electronics and suitable for portable datalogging, medical instrumentation, battery-powered test equipment, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1392ETB+ 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 consumer applications.
The MAX1392ETB+ belongs to Maxim's precision data-acquisition product line, engineered for ultra-low-power, small-footprint, true-differential ADC applications in battery-operated and space-constrained systems.
FAQ
What is the maximum sample rate of the MAX1392ETB+?
The MAX1392ETB+ achieves a maximum throughput rate of 357ksps, corresponding to a minimum conversion time of 2.2µs. This rate is sustained at full 10-bit accuracy with 61dB SINAD at 85kHz input frequency and is achievable across the full supply range (+1.5V to +3.6V) and temperature range (–40°C to +85°C).
Does the MAX1392ETB+ require an external reference voltage?
Yes, the MAX1392ETB+ requires an external reference voltage applied to the REF pin. The supported range is 0.6V to VDD + 0.05V. A 0.1µF bypass capacitor must be placed between REF and GND, close to the device, to ensure stable reference performance and minimize noise-induced errors in the MAX1392ETB+ conversion results.
How does the UNI/BIP pin affect the output format of the MAX1392ETB+?
The UNI/BIP pin on the MAX1392ETB+ selects the input range and output coding format: when driven high, the MAX1392ETB+ operates in unipolar mode (0 to VREF input, straight-binary output); when pulled low, it operates in bipolar mode (±VREF/2 input, two's-complement output). The pin must be stable before the first SCLK rising edge after CS fall to guarantee correct conversion behavior.
What package type is used for the MAX1392ETB+?
The MAX1392ETB+ is packaged in a 3mm × 3mm, 10-pin TDFN-EP (thin dual flat no-lead with exposed pad). The exposed pad is not internally connected and should be soldered to GND on the PCB for optimal thermal dissipation and electrical performance. This compact package supports high-density layouts in portable and wearable electronics.
Can the MAX1392ETB+ interface directly with a microcontroller SPI port?
Yes, the MAX1392ETB+ is fully compatible with standard SPI interfaces when configured with CPOL = 0 and CPHA = 0 (or CPOL = 1 and CPHA = 1). Connect CS and OE together, use SCLK and DOUT, and perform two consecutive 8-bit reads to retrieve the full 10-bit result (padded with four leading zeros). The MAX1392ETB+ enters AutoShutdown after the LSB is clocked out.
MAX1392ETB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 357k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- 3-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
- Voltage - Supply, Analog:
- 1.5V ~ 3.6V
- Voltage - Supply, Digital:
- 1.5V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-TDFN-EP (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1392ETB+ FAQ
1.How can I place an order for MAX1392ETB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1392ETB+ 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 MAX1392ETB+ reliable?
The price and inventory of MAX1392ETB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1392ETB+ is usually 5 days.
3.What payment methods are accepted for MAX1392ETB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1392ETB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1392ETB+?
MAX1392ETB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1392ETB+ 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 MAX1392ETB+?
For technical support, including MAX1392ETB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1392ETB+ requirements.
6.How does Aetrix verify that MAX1392ETB+ is sourced from the original manufacturer or authorized distributors?
All MAX1392ETB+ 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 MAX1392ETB+ meets industry standards.
7.What is the process for return or replacement of MAX1392ETB+?
All MAX1392ETB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1392ETB+, 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 MAX1392ETB+ part is unused and in its original packaging.
Return procedure for MAX1392ETB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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