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Analog Devices Inc./Maxim Integrated MAX1088ETA+
- Part No.:
- MAX1088ETA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX1088ETA+.pdf
- Description:
- ADC, SUCCESSIVE APPROXIMATION, 1
- Quantity:
- Payment:
- Shipping:
Inventory:1,790
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Product details
Overview
The MAX1088ETA+ from Maxim Integrated is a 10-bit, true-differential successive-approximation ADC operating from a single +5V supply, delivering 150ksps sampling rate, ±1.0 LSB INL, and 61dB SINAD at 10kHz input. It features AutoShutdown (0.2µA), 3-wire SPI/QSPI/MICROWIRE interface, and internal conversion clock - designed for precision low-power portable data acquisition where differential signal rejection and space-constrained PCB layouts are critical.
For engineers reviewing the MAX1088ETA+ datasheet, MAX1088ETA+ pinout, MAX1088ETA+ application, or MAX1088ETA+ equivalent, this page delivers verified technical context, validated pin functions, real-world use-value per application, and two confirmed alternative parts with documented functional and application-level differences - all grounded in Maxim's official specifications for the MAX1088ETA+ variant.
Technical Context
The MAX1088ETA+ implements a true-differential track-and-hold architecture with dedicated AIN+ and AIN− inputs, enabling bipolar (±VREF/2) or unipolar (0 to VREF) conversion modes selected via CNVST timing. Its internal 4MHz oscillator (±10%) eliminates external clock dependency, while the SAR core achieves 3.7µs conversion time and 1.4µs acquisition time.
It operates exclusively with an external reference (1.0V to VDD+50mV), supports 8MHz max SCLK, and uses MSB-first 12-bit serial output (10 data + 2 sub-bits), with straight-binary format in unipolar mode and two's-complement in bipolar mode - all synchronized by edge-triggered CNVST control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete digital codes over full-scale range, sufficient for medium-precision sensor digitization. |
| Sampling Rate | 150ksps maximum - supports real-time capture of signals up to ~100kHz full-linear bandwidth (SINAD >56dB). |
| INL / DNL | ±1.0 LSB integral nonlinearity and no missing codes - ensures monotonicity and <0.1% end-point error across temperature. |
| Power @ 150ksps | 245–350µA at VDD = +5V - enables <0.5mW active power, critical for battery-powered 10ksps–150ksps data loggers. |
| Supply Range | +4.75V to +5.25V - compatible with standard 5V logic rails and regulated LDO outputs without level-shifting. |
| Reference Input | 1.0V to VDD+50mV - accepts precision references (e.g., 4.096V) or ratiometric sensor bridges directly. |
| Interface | SPI/QSPI/MICROWIRE-compatible 3-wire serial - interoperates with ARM Cortex-M, PIC, and DSP host controllers using CPOL=0/CPHA=0. |
Pinout & Package
MAX1088ETA+ is housed in an 8-pin TDFN-EP package (3mm × 3mm, 0.75mm height) with exposed pad for thermal and ground enhancement. Pin numbering follows standard top-view orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Positive supply input | +4.75V to +5.25V analog/digital rail; requires local 0.1µF ceramic bypass to GND for noise immunity. |
| 2 AIN+ | Differential positive analog input | Accepts 0 to VREF (unipolar) or ±VREF/2 (bipolar); input leakage ±0.01µA enables high-Z sensor interfacing. |
| 3 AIN− | Differential negative analog input | Paired with AIN+; common-mode range extends to GND–0.3V and VDD+0.3V (clamped diodes). |
| 4 GND | Analog/digital ground reference | Single ground plane recommended; exposed pad must be connected to GND for optimal thermal performance. |
| 5 REF | External reference voltage input | Defines full-scale range; 0.1µF capacitor required; supports 1.0V–5.3V (VDD+50mV) for flexibility. |
| 6 CNVST | Conversion start and mode control | Rising edge powers up IC; falling edge triggers hold/conversion; pulse sequence selects unipolar/bipolar mode. |
| 7 DOUT | Serial data output | MSB-first 12-bit stream (10 data + 2 sub-bits); high-impedance after final bit; transitions on SCLK falling edge. |
| 8 SCLK | Serial clock input | Host-generated clock up to 8MHz; controls data timing; CPOL=0/CPHA=0 required for SPI compatibility. |
Key Features
| Feature | Design Value |
|---|---|
| True-differential input architecture | Rejects common-mode noise up to 0.1mV over 0V–VDD range, enabling accurate measurement in noisy industrial environments. |
| Software-configurable unipolar/bipolar mode | Eliminates need for external signal conditioning circuitry - polarity selection handled entirely by CNVST timing sequence. |
| AutoShutdown between conversions | Reduces current to 0.2µA (typ) when idle, cutting average power by >99% in burst-sampling applications (e.g., 1ksps duty-cycled systems). |
| Internal conversion clock | Removes dependency on precise external clock source; simplifies layout and reduces BOM count versus externally clocked SAR ADCs. |
| 8-pin TDFN-EP package | 3mm × 3mm footprint with exposed pad provides thermal resistance of 18.2mW/°C above +70°C - suitable for compact, thermally constrained designs. |
Applications
| Portable Temperature Monitors | Flowmeters |
|---|---|
|
Use Scenario: Battery-powered handheld thermometer using thermistor or RTD bridge with low-level mV output. IC Role / Device Role / Timing Role: True-differential ADC digitizes bridge output while rejecting EMI from display backlight or wireless modules. Use Value: ±1.0 LSB INL and 61dB SINAD ensure <0.1°C resolution stability across –40°C to +85°C operating range. |
Use Scenario: Ultrasonic or magnetic flowmeter sensing analog voltage proportional to fluid velocity. IC Role / Device Role / Timing Role: Converts differential transducer output at up to 150ksps with minimal latency for real-time flow calculation. Use Value: 1.4µs acquisition time and 3.7µs conversion enable sub-millisecond loop response in closed-loop metering systems. |
| Touch Screens | Low Power Data Acquisition |
|
Use Scenario: Resistive touch panel controller measuring X/Y electrode voltage ratios in portable HMI devices. IC Role / Device Role / Timing Role: Digitizes ratiometric analog signals with internal reference tracking, eliminating external VREF dependency. Use Value: Unipolar/bipolar mode flexibility allows direct support of both 4-wire and 5-wire touch architectures without hardware change. |
Use Scenario: Remote environmental sensor node logging temperature, humidity, and pressure over multi-day battery life. IC Role / Device Role / Timing Role: ADC core operates only during scheduled wake-up bursts, entering 0.2µA shutdown between samples. Use Value: 2.5µA average current at 1ksps sampling enables >1-year operation on a single CR2032 coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit differential ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-pin SOIC package; 125ksps max; no AutoShutdown; requires external clock; 2.7V–5.25V supply. | Lacks true-differential input - only single-ended with pseudo-differential software mode; lower sampling rate limits dynamic signal capture. | Choose for cost-sensitive, non-battery applications where board space is less constrained and differential noise rejection is secondary. |
| AD7476ARTZ-REEL7 | 6-pin SOT23; 1MSPS; single-ended only; 2.35V–5.25V; no internal reference buffer; higher 3.5mW power at full speed. | No differential input or bipolar mode; incompatible pinout and interface protocol (no CNVST-based mode control). | Prefer for high-speed, single-ended sensor interfaces where throughput >150ksps is mandatory and power budget allows. |
Compared with ADS7822U and AD7476ARTZ-REEL7, the MAX1088ETA+ uniquely combines true-differential input, software-selectable unipolar/bipolar conversion, AutoShutdown, and TDFN packaging - making it the only option among the three that meets simultaneous requirements for noise-immune measurement, ultra-low quiescent power, and minimal PCB area in portable instrumentation.
Availability
MAX1088ETA+ is available at Aetrix Electronics and suitable for portable temperature monitors, flowmeters, and touch screens requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MAX1088ETA+ 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 portable applications.
The MAX1086–MAX1089 family was designed specifically for space- and power-constrained data acquisition systems needing true-differential input capability without external clocking or complex configuration - targeting battery-powered test equipment and sensor nodes.
FAQ
What supply voltage range does the MAX1088ETA+ support?
The MAX1088ETA+ operates from a single +4.75V to +5.25V supply, optimized for standard 5V system rails. It draws 245–350µA at 150ksps and drops to 0.2µA in AutoShutdown. Operation outside this range risks parametric degradation or damage, as specified in the Absolute Maximum Ratings table - always use a 0.1µF ceramic capacitor directly at the VDD pin to GND for stable performance.
How does the MAX1088ETA+ achieve true-differential input operation?
The MAX1088ETA+ uses a dedicated track-and-hold circuit with separate AIN+ and AIN− inputs that sample the voltage difference simultaneously. Its internal switched-capacitor DAC and comparator convert this differential voltage directly into a 10-bit result. The device supports both unipolar (0 to VREF) and bipolar (±VREF/2) ranges, selected by CNVST pulse timing - no external op-amps or level-shifting components are needed.
What is the function of the CNVST pin on the MAX1088ETA+?
The CNVST pin on the MAX1088ETA+ serves three critical roles: (1) rising edge powers up the device and initiates track mode, (2) falling edge triggers hold mode and starts conversion, and (3) its pulse sequence determines unipolar vs. bipolar mode selection. A single high pulse enables unipolar mode; a high–low–high sequence enables bipolar mode - all without register writes or external configuration.
Does the MAX1088ETA+ require an external reference voltage?
Yes, the MAX1088ETA+ requires an external reference voltage applied to the REF pin. It accepts 1.0V to VDD+50mV (i.e., up to +5.3V), and Maxim specifies 4.096V for optimal 5V operation. A 0.1µF ceramic capacitor must be placed directly between REF and GND to minimize noise and ensure stable full-scale accuracy - no internal reference is provided.
What serial interface protocols is the MAX1088ETA+ compatible with?
The MAX1088ETA+ supports SPI, QSPI, and MICROWIRE protocols using a 3-wire interface (CNVST, SCLK, DOUT). It requires CPOL = 0 and CPHA = 0, with data valid on the SCLK falling edge and latched on the rising edge. The device outputs 12 bits (10 data + 2 sub-bits) MSB-first, and supports up to 8MHz SCLK - enabling seamless integration with ARM, PIC, and DSP host controllers.
MAX1088ETA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 150
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- 3-Wire Serial, Microwire, QSPI, SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- Internal Oscillator
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-TDFN-EP (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1088ETA+ FAQ
1.How can I place an order for MAX1088ETA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1088ETA+ 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 MAX1088ETA+ reliable?
The price and inventory of MAX1088ETA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1088ETA+ is usually 5 days.
3.What payment methods are accepted for MAX1088ETA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1088ETA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1088ETA+?
MAX1088ETA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1088ETA+ 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 MAX1088ETA+?
For technical support, including MAX1088ETA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1088ETA+ requirements.
6.How does Aetrix verify that MAX1088ETA+ is sourced from the original manufacturer or authorized distributors?
All MAX1088ETA+ 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 MAX1088ETA+ meets industry standards.
7.What is the process for return or replacement of MAX1088ETA+?
All MAX1088ETA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1088ETA+, 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 MAX1088ETA+ part is unused and in its original packaging.
Return procedure for MAX1088ETA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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