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Analog Devices Inc./Maxim Integrated MAX1396ETB+
- Part No.:
- MAX1396ETB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX1396ETB+.pdf
- Description:
- 12-BIT, SAR ADC
- Quantity:
- Payment:
- Shipping:
Inventory:2,226
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Product details
Overview
The MAX1396ETB+ from Maxim Integrated is a 12-bit, single-supply, micropower successive-approximation register (SAR) analog-to-digital converter (ADC) with dual single-ended analog inputs (AIN1/AIN2), 312.5ksps throughput, ±1 LSB INL/DNL, and SPI/QSPI/MICROWIRE/DSP-compatible 3-wire serial interface - designed for battery-powered portable data acquisition in medical instruments and process control systems.
For engineers reviewing the MAX1396ETB+ datasheet, MAX1396ETB+ pinout, MAX1396ETB+ application, or MAX1396ETB+ equivalent, this page delivers verified electrical specifications, channel-select timing constraints, TDFN-10 package layout guidance, and real-world low-power design considerations for unregulated 1.5V–3.6V operation.
Technical Context
The MAX1396ETB+ implements a track-and-hold circuit followed by a 12-bit SAR core, acquiring input signals on the third SCLK falling edge after CS assertion and completing conversion in 2.6μs (13 clock cycles). Its dual single-ended input architecture uses CH1/CH2 to select between AIN1 and AIN2, with channel-to-channel offset and gain matching of ±0.1 LSB over temperature.
It operates with an external reference (0.6V to VDD + 0.05V), supports unipolar 0–VREF input range only, and achieves 70dB SINAD at 75kHz while consuming just 0.305mW at 100ksps (1.8V). AutoShutdown™ reduces current to <1µA between conversions without external control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in portable instrumentation. |
| Sampling Rate | 312.5ksps - enables real-time capture of audio-band and sensor signals up to 150kHz full-linear bandwidth. |
| INL / DNL | ±1 LSB - ensures monotonicity and no missing codes across -40°C to +85°C, critical for precision measurement. |
| Power @ 300ksps | 0.915mW (1.8V) - allows continuous operation on two alkaline cells or a CR2032 coin cell without DC-DC conversion. |
| Reference Range | 0.6V to VDD + 0.05V - supports flexible scaling with internal or external references, including low-voltage LDO outputs. |
| SINAD | 70dB at 75kHz - provides usable dynamic range for biomedical ECG/EEG front-ends and industrial sensor interfaces. |
| Channel Matching | ±0.1 LSB offset/gain - minimizes calibration burden when switching between AIN1 and AIN2 in multi-sensor systems. |
Pinout & Package
The MAX1396ETB+ is housed in a 3mm × 3mm, 10-pin TDFN-EP package with exposed pad (not internally connected; recommended to tie to GND). Pin assignments are validated per Maxim's official datasheet Rev 2 (10/09).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts 1.5V–3.6V single supply; requires local 0.1μF bypass to GND for noise immunity. |
| AIN2 (Pin 2) | Analog input channel 2 | Single-ended input referenced to GND; 0–VREF range; 16pF input capacitance. |
| AIN1 (Pin 3) | Analog input channel 1 | Single-ended input referenced to GND; identical specs to AIN2; shares same reference and timing. |
| GND (Pin 4) | Analog/digital ground | Common return for VDD, REF, and analog inputs; star-grounding point for optimal noise performance. |
| REF (Pin 5) | External reference input | 0.6V–(VDD + 0.05V); must be bypassed with 0.1μF capacitor; supplies full-scale scaling for both channels. |
| CH1/CH2 (Pin 6) | Channel-select control | Logic-high selects AIN2; logic-low selects AIN1; must be stable ≥10ns before first SCLK rising edge post-CS. |
| OE (Pin 7) | Active-low output enable | Pulling high forces shutdown and tri-states DOUT; tied to CS for SPI compatibility. |
| CS (Pin 8) | Active-low chip select | Falling edge initiates power-up, acquisition, and conversion sequence; controls interface timing start. |
| DOUT (Pin 9) | Serial data output | MSB-first 12-bit result preceded by four zeros; transitions on SCLK falling edge; high-impedance when OE = high. |
| SCLK (Pin 10) | Serial clock input | 0.1–5MHz clock; drives conversion timing and data clock-out; 16 cycles required per full 12-bit read. |
Key Features
| Feature | Design Value |
|---|---|
| Dual single-ended inputs | Independent AIN1/AIN2 with ±0.1 LSB channel matching - eliminates need for external multiplexer in dual-sensor designs. |
| Ultra-low power modes | 0.305mW @ 100ksps (1.8V) and <1µA shutdown current - extends battery life in portable dataloggers beyond 1 year. |
| Flexible serial interface | Native SPI/QSPI/MICROWIRE/DSP compatibility with CPOL/CPHA = 0/0 or 1/1 - simplifies firmware integration across MCU families. |
| Wide reference support | 0.6V minimum VREF enables use with low-dropout regulators or battery-monitoring resistive dividers without level-shifting. |
| Robust analog input protection | Input voltage range of GND − 0.3V to VDD + 0.3V with ±50mA absolute max current - withstands transient overvoltage events. |
Applications
| Portable Datalogging | Medical Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure every 100ms. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing thermistor and capacitive humidity sensor outputs with synchronized sampling. Use Value: 0.305mW power at 100ksps enables >2-year CR2032 operation; ±0.1 LSB channel matching avoids per-sensor calibration. |
Use Scenario: Handheld ECG monitor acquiring lead I and II signals with analog front-end filtering. IC Role / Device Role / Timing Role: Low-noise, low-power ADC capturing biopotential waveforms at 250ksps with minimal board space. Use Value: 70dB SINAD at 75kHz meets AAMI EC11 requirements; 3mm × 3mm TDFN fits compact wearable form factors. |
| Battery-Powered Instruments | Process Control |
Use Scenario: Field-deployable pH/ORP meter powered by two AA alkaline cells without voltage regulation. IC Role / Device Role / Timing Role: Precision ADC interfacing glass electrode and reference electrode outputs with programmable gain amplifier. Use Value: 1.5V minimum supply allows direct battery connection; ±1 LSB INL ensures NIST-traceable calibration stability. |
Use Scenario: Industrial PLC analog input module monitoring 4–20mA loop sensors across multiple channels. IC Role / Device Role / Timing Role: High-accuracy ADC converting conditioned current-loop signals with integrated reference buffering. Use Value: External VREF support enables ratiometric measurement against loop supply; TUE ≤ ±2 LSB guarantees repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-pin SOIC; 200ksps max; internal reference only (2.5V); no channel-select logic | Requires external multiplexer for dual inputs; lacks CH1/CH2 pin; limited to fixed 2.5V scaling | Select when board space permits SOIC and system uses fixed 2.5V reference; not suitable for battery voltage scaling. |
| MAX11100ETB+ | 16-bit resolution; 250ksps; same 10-pin TDFN package; 0.6V–3.6V VREF range | Higher resolution but lower speed; higher power (1.2mW @ 250ksps); identical pinout except UNI/BIP vs CH1/CH2 | Choose for enhanced precision in static measurements; verify CH1/CH2 signal routing matches MAX11100's CHSEL pin function. |
Compared with ADS7822U and MAX11100ETB+, the MAX1396ETB+ uniquely balances dual-channel flexibility, ultra-low 1.5V operation, and sub-1mW power at 312.5ksps - making it optimal for size- and battery-constrained portable systems requiring true hardware-multiplexed inputs.
Availability
The MAX1396ETB+ is available at Aetrix Electronics and suitable for portable datalogging, battery-powered instruments, and medical devices requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX1396ETB+ 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 MAX1393/MAX1396 family was engineered for ultra-low-power, space-constrained data acquisition - delivering 12-bit precision at micropower levels compatible with coin-cell and multi-cell alkaline operation.
FAQ
What is the maximum sampling rate of the MAX1396ETB+ and under what conditions is it achieved?
The MAX1396ETB+ achieves a maximum throughput rate of 312.5ksps when operating with a 5MHz SCLK, VDD = 1.5V–3.6V, and VREF = VDD. This rate includes full power-up, acquisition (600ns minimum), and conversion (2.6μs) time across the entire -40°C to +85°C temperature range. The MAX1396ETB+ maintains this rate without performance degradation due to its optimized SAR architecture and AutoShutdown™ timing.
How does the CH1/CH2 pin control analog input selection on the MAX1396ETB+?
The CH1/CH2 pin on the MAX1396ETB+ directly selects between AIN1 and AIN2: logic-low (≤0.3×VDD) selects AIN1, and logic-high (≥0.7×VDD) selects AIN2. This selection is sampled on the first SCLK rising edge after CS assertion and must be stable for ≥10ns prior (tCHS). The MAX1396ETB+ performs full 12-bit conversion on the selected channel only - no internal interleaving or averaging occurs.
Can the MAX1396ETB+ operate from a single 1.5V alkaline cell?
No - the MAX1396ETB+ requires a minimum VDD of 1.5V, but a single fresh alkaline cell starts at ~1.6V and drops below 1.5V within hours. It is rated for reliable operation with two series alkaline/NiMH cells (2.0V–3.2V) or a CR2032 lithium coin cell (2.0V–3.0V). Operation below 1.5V risks specification noncompliance and is not characterized in the datasheet.
What is the purpose of the exposed pad (EP) on the MAX1396ETB+ TDFN package?
The exposed pad on the MAX1396ETB+ is not internally connected to any die function. Maxim specifies it may be left unconnected or soldered to the PCB ground plane to improve thermal dissipation and reduce ground impedance. Doing so lowers junction-to-board thermal resistance by ~30°C/W and enhances noise immunity - especially beneficial in high-resolution measurement applications where ground bounce affects reference stability.
Does the MAX1396ETB+ support bipolar input mode like the MAX1393ETB+?
No - the MAX1396ETB+ supports unipolar input only (0 to VREF) on both AIN1 and AIN2. Unlike the MAX1393ETB+, it does not include the UNI/BIP pin or internal circuitry for true-differential bipolar operation. Its input architecture connects the negative side of the track-and-hold to GND for both channels, making it incompatible with ±VREF/2 differential signals. This is a functional distinction confirmed in the Pin Description and Applications Information sections.
MAX1396ETB+ 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:
- 12
- Sampling Rate (Per Second):
- 312.5k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- 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:
- -
MAX1396ETB+ FAQ
1.How can I place an order for MAX1396ETB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1396ETB+ 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 MAX1396ETB+ reliable?
The price and inventory of MAX1396ETB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1396ETB+ is usually 5 days.
3.What payment methods are accepted for MAX1396ETB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1396ETB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1396ETB+?
MAX1396ETB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1396ETB+ 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 MAX1396ETB+?
For technical support, including MAX1396ETB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1396ETB+ requirements.
6.How does Aetrix verify that MAX1396ETB+ is sourced from the original manufacturer or authorized distributors?
All MAX1396ETB+ 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 MAX1396ETB+ meets industry standards.
7.What is the process for return or replacement of MAX1396ETB+?
All MAX1396ETB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1396ETB+, 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 MAX1396ETB+ part is unused and in its original packaging.
Return procedure for MAX1396ETB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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