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Analog Devices Inc./Maxim Integrated MAX117EAI+
- Part No.:
- MAX117EAI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX117EAI+.pdf
- Description:
- IC ADC 8BIT FLASH 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,142
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Product details
Overview
MAX117EAI+ from Maxim Integrated is an 8-bit, 8-channel analog-to-digital converter (ADC) designed for low-power, microprocessor-compatible data acquisition. It operates from a single +3.0V to +3.6V supply, achieves 400ksps sampling rate with 1.8µs conversion time per channel, features internal track/hold and ratiometric reference inputs, and supports burst-mode operation via 1µA power-down mode - ideal for battery-powered remote monitoring systems.
For engineers reviewing the MAX117EAI+ datasheet, MAX117EAI+ pinout, MAX117EAI+ application, or MAX117EAI+ equivalent, this page delivers verified electrical parameters, validated package mapping (28-pin SSOP), confirmed timing behavior in WR-RD and pipelined modes, and real-world interface constraints including tACQ = 450ns minimum acquisition time and INT-driven conversion synchronization.
Technical Context
The MAX117EAI+ uses a half-flash architecture with two cascaded 4-bit flash ADC sections and an internal DAC to generate the 8-bit result - enabling high-speed conversion without external clocking. Its analog multiplexer selects among eight input channels under A0–A2 address control, with IN8 hardwired to REF+ for reference monitoring.
Digital interface supports two modes: read mode (MODE = 0) using RD/CS for conversion initiation and RDY status, and write-read mode (MODE = 1) using WR to start conversion and INT to signal completion. Power-down recovery requires <900ns, combining power-up delay and track/hold acquisition time, making it suitable for tightly scheduled burst sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - provides 256 discrete output codes with binary coding and 1LSB = (REF+ − REF−)/256 |
| Sampling Rate | 400ksps maximum - achievable in WR-RD mode with tWR + tRD + tRI + tACQ = 1.6µs total cycle time |
| Total Unadjusted Error | ≤ ±1 LSB - guarantees monotonicity and no missing codes across full temperature range (−40°C to +85°C) |
| Power-Down Current | 1 µA typical - enables ultra-low quiescent power in standby between measurement bursts |
| Input Full-Power Bandwidth | 0.3 MHz - supports accurate digitization of fast transients up to ~300 kHz before aliasing dominates |
| SINAD | 45 dB at fIN = 30.273 kHz - corresponds to ~7.2 effective bits, sufficient for sensor-level precision in portable instrumentation |
| Supply Voltage Range | +3.0 V to +3.6 V - compatible with modern Li-ion/Li-poly battery rails and eliminates need for LDO regulation |
Pinout & Package
MAX117EAI+ is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, JEDEC MO-153 compliant, and rated for −40°C to +85°C industrial operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | IN1 to IN8 | Analog input channels; IN8 internally connected to REF+, enabling reference voltage monitoring |
| 9, 10, 11 | A0, A1, A2 | 3-bit address inputs selecting one of eight analog channels per Table 1 (MAX117 only) |
| 12 | GND | Analog/digital ground reference - must be low-impedance and separated from noisy digital return paths |
| 13 | REF− | Lower reference rail; sets zero-code voltage; accepts GND ≤ VREF− < VREF+ |
| 14 | REF+ | Upper reference rail; sets full-scale voltage; internally hardwired to IN8 |
| 15 | WR/RDY | Configurable dual-function pin: write strobe in MODE=1, ready-status open-collector output in MODE=0 |
| 16 | CS | Chip-select enable - must be low for WR or RD to be recognized; resets INT on rising edge |
| 17, 18, 19 | D4, D5, D6 | Three-state data outputs - latched, bus-compatible, driven only when CS and RD are active |
| 20 | D7 | MSB data output - shares same timing and drive strength as other D0–D7 lines |
| 21, 22, 23 | D0, D1, D2 | LSB data outputs - D0 is least significant bit; all outputs tri-state when CS or RD is high |
| 24 | VDD | +3.0V to +3.6V supply - requires 4.7µF electrolytic + 0.1µF ceramic bypass to GND |
| 25 | PWRDN | Active-low power-down control - pulls supply current to 1µA; must be driven to VDD or GND, not left floating |
| 26 | MODE | Interface mode select - internally pulled low (15µA); MODE=0 = read mode, MODE=1 = write-read mode |
| 27 | INT | Open-drain interrupt - goes low at conversion end; reset by rising edge of CS or RD |
| 28 | RD | Read strobe - initiates data access in both modes; in MODE=0, also triggers conversion with CS |
Key Features
| Feature | Design Value |
|---|---|
| No external clock required | Internal timing generator eliminates clock distribution complexity and jitter sensitivity in compact layouts |
| Ratiometric reference inputs | REF+ and REF− define full-scale and zero-scale; enables direct use of unregulated supply or sensor bridge outputs without ratio error |
| Internally connected 8th channel | IN8 tied to REF+ - allows real-time monitoring of reference stability without external routing or component count increase |
| 1.8µs conversion time | Guaranteed worst-case latency per sample - supports deterministic sampling in time-critical embedded control loops |
| 1µA power-down current | Reduces average system power by >99% during idle intervals - critical for multi-year battery life in IoT endpoints |
Applications
| Battery-Powered Remote Sensors | Portable Medical Instrumentation |
|---|---|
Use Scenario: Continuous environmental monitoring (temperature, humidity, gas concentration) in wireless sensor nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: 8-channel ADC digitizes multiple sensor outputs sequentially; PWRDN enables microsecond wake-up for scheduled sampling every 100ms. Use Value: 1µA shutdown current extends battery life beyond 5 years; ratiometric operation eliminates need for precision voltage references. |
Use Scenario: Handheld ECG or pulse oximeter acquiring analog biosignals from multiple electrodes or photodiodes. IC Role / Device Role / Timing Role: Tracks fast-changing biopotentials with 0.3MHz input bandwidth; internal track/hold captures transient waveforms without external sample-hold circuitry. Use Value: 400ksps throughput supports oversampling for noise reduction; 8-bit resolution meets clinical accuracy requirements for trend analysis. |
| Industrial System-Health Monitoring | Communications Baseband Signal Acquisition |
Use Scenario: Real-time voltage, current, and temperature monitoring of power supplies and FPGAs in telecom infrastructure equipment. IC Role / Device Role / Timing Role: Digitizes eight critical analog health signals in sequence; INT pin synchronizes MCU firmware reads to avoid race conditions. Use Value: Total unadjusted error ≤±1 LSB ensures reliable fault detection thresholds; SSOP package fits dense PCB layouts near monitored components. |
Use Scenario: Low-cost baseband receiver front-end capturing I/Q analog signals prior to digital demodulation in short-range radios. IC Role / Device Role / Timing Role: Simultaneous sampling of dual analog paths (I and Q) using interleaved channel selection; pipelined WR=RD mode sustains continuous data flow. Use Value: 45dB SINAD preserves dynamic range for 16-QAM decoding; single-supply +3.3V operation simplifies power architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit resolution, SPI interface, 200ksps max, no internal track/hold, requires external reference | Higher precision but slower; lacks burst-mode power-down (<1µA) and ratiometric flexibility | Select for higher resolution where speed and ultra-low power are secondary |
| MAX11100ETL+ | 12-bit, 8-channel, SPI, 1MSPS, integrated reference, 2.7V–3.6V supply, 12-lead TDFN | Higher speed/resolution, smaller package, but no PWRDN pin or IN8-to-REF+ monitoring feature | Select when board space is constrained and reference integration outweighs monitoring capability |
Compared with ADS7822U and MAX11100ETL+, the MAX117EAI+ uniquely combines 8-channel count, 400ksps speed, 1µA power-down, and built-in REF+-monitoring on IN8 - making it optimal for cost-sensitive, battery-operated systems requiring deterministic low-power sampling without external support components.
Availability
MAX117EAI+ is available at Aetrix Electronics and suitable for battery-powered remote sensors, portable medical instrumentation, and industrial system-health monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX117EAI+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX117EAI+ belongs to Maxim's legacy high-speed, low-power ADC family targeting portable and remote data acquisition - engineered specifically for single-supply, microprocessor-compatible operation with minimal external components.
FAQ
What is the operating temperature range for the MAX117EAI+?
The MAX117EAI+ is specified for industrial operation from −40°C to +85°C. This rating is confirmed in the Ordering Information table, where "E" grade denotes the −40°C to +85°C range, and "AI" suffix indicates the 28-pin SSOP package. All electrical characteristics in the datasheet - including 1.5mA operating current, 1µA power-down current, and ±1 LSB total unadjusted error - are guaranteed across this full range.
Does the MAX117EAI+ require an external clock source?
No, the MAX117EAI+ does not require an external clock. Its half-flash architecture uses an internal timing generator to achieve 1.8µs conversion time per channel. The device operates autonomously once triggered by WR or RD, eliminating clock routing, jitter concerns, and external oscillator components - a key enabler for compact, low-noise PCB layouts.
How is the 8th analog input (IN8) used in the MAX117EAI+?
In the MAX117EAI+, IN8 is internally hardwired to REF+, allowing direct monitoring of the reference voltage level. When A2/A1/A0 = 111, the multiplexer selects IN8, and the ADC returns a digital code proportional to REF+ relative to REF−. This provides real-time verification of reference stability without external connections or additional components.
What is the minimum acquisition time (tACQ) required for accurate conversions with the MAX117EAI+?
The MAX117EAI+ requires a minimum acquisition time of 450ns (tACQ) in all grades, as specified in the Timing Characteristics table for TA = TMIN to TMAX. This interval begins after address setup (A0–A2 valid) and ends before conversion initiation (WR or RD low). Failure to meet tACQ risks incomplete settling of the internal track/hold amplifier and increased quantization error.
Can the MAX117EAI+ operate from a +3.3V supply?
Yes, the MAX117EAI+ is fully specified for operation from +3.0V to +3.6V, explicitly including +3.3V. Electrical characteristics such as 1.5mA supply current, 400ksps sampling rate, and 1.8µs conversion time are guaranteed across this range. The Typical Operating Characteristics graphs confirm stable performance at VDD = 3.3V for parameters like conversion time and supply current.
MAX117EAI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Flash
- Reference Type:
- External
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Features:
- Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX117EAI+ FAQ
1.How can I place an order for MAX117EAI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX117EAI+ 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 MAX117EAI+ reliable?
The price and inventory of MAX117EAI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX117EAI+ is usually 5 days.
3.What payment methods are accepted for MAX117EAI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX117EAI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX117EAI+?
MAX117EAI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX117EAI+ 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 MAX117EAI+?
For technical support, including MAX117EAI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX117EAI+ requirements.
6.How does Aetrix verify that MAX117EAI+ is sourced from the original manufacturer or authorized distributors?
All MAX117EAI+ 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 MAX117EAI+ meets industry standards.
7.What is the process for return or replacement of MAX117EAI+?
All MAX117EAI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX117EAI+, 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 MAX117EAI+ part is unused and in its original packaging.
Return procedure for MAX117EAI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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