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Analog Devices Inc./Maxim Integrated MAX113ENG+
- Part No.:
- MAX113ENG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX113ENG+.pdf
- Description:
- IC ADC 8BIT 400KSPS 24-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,156
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Product details
Overview
MAX113ENG+ from Maxim Integrated is a +3V, 4-channel, 8-bit analog-to-digital converter (ADC) using half-flash architecture to achieve 1.8µs conversion time (400ksps), 1µA power-down current, and integrated track/hold - designed for battery-powered data acquisition in portable instrumentation and system-health monitoring.
For engineers reviewing the MAX113ENG+ datasheet, MAX113ENG+ pinout, MAX113ENG+ application, or MAX113ENG+ equivalent, this page delivers verified electrical specs, validated 24-pin narrow plastic DIP package mapping, confirmed ratiometric reference operation, and real-world timing behavior under burst-mode and µP interface conditions.
Technical Context
The MAX113ENG+ implements a two-stage half-flash ADC architecture: first, a 4-bit flash section resolves the MSBs using 15 comparators and a resistor ladder; then an internal DAC generates a residue voltage, which a second 4-bit flash section converts to yield the full 8-bit result. This enables single-supply +3.0V to +3.6V operation without external clocking.
It supports dual digital interface modes via the MODE pin: read mode (MODE = 0) uses RD to initiate and latch conversion with RDY status output; write-read mode (MODE = 1) uses WR to start conversion and INT to signal completion, enabling pipelined operation when WR and RD are tied together. Channel selection is controlled by A0–A2 address inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes with binary coding and 1 LSB = (VREF+ − VREF−)/256. |
| Conversion Time | 1.8 µs (typ) in WR-RD mode - enables 400ksps sampling rate for real-time signal capture in portable systems. |
| Total Unadjusted Error | ≤ ±1 LSB (max) - ensures monotonicity and no missing codes across full temperature range (−55°C to +125°C). |
| Supply Current | 1.5 mA (operating), 1 µA (power-down) - reduces average power in burst-mode sensing by >1000×. |
| Input Channels | 4 single-ended analog inputs (IN1–IN4) - selected via A0/A1 address lines; no internal channel 8 (unlike MAX117). |
| Reference Interface | Ratiometric REF+/REF− inputs - allows direct connection to sensor bridges or voltage dividers without precision reference ICs. |
| Track/Hold | Integrated - acquires fast signals up to 0.5 V/µs slew rate; holds input during conversion to prevent aliasing. |
Pinout & Package
MAX113ENG+ is packaged in a 24-pin narrow plastic DIP (0.300" width), RoHS-compliant and rated for −55°C to +125°C operating temperature.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 24) | Positive supply input | Accepts +3.0V to +3.6V; requires 4.7µF + 0.1µF bypassing to GND for stable conversion performance. |
| PWRDN (Pin 23) | Power-down control | Logic low reduces supply current to 1 µA; wake-up time <900 ns includes power-up + track/hold acquisition. |
| A0, A1 (Pins 22, 21) | Multiplexer address inputs | Select IN1–IN4 (00→IN1, 01→IN2, 10→IN3, 11→IN4); A2 not connected on MAX113ENG+. |
| IN1–IN4 (Pins 5, 3, 4, 1) | Analog input terminals | Single-ended, 32 pF input capacitance; support source impedances ≤1.5 kΩ without extended tACQ. |
| REF+, REF− (Pins 14, 13) | Reference span inputs | Set full-scale (REF+) and zero-scale (REF−) voltages; enable ratiometric measurement with sensor outputs. |
| RD, WR/RDY (Pins 10, 15) | Digital interface control | In read mode (MODE=0): RD initiates conversion, WR/RDY acts as open-collector RDY status output. |
| INT (Pin 11) | Interrupt output | Active-low pulse indicates end of conversion; resets on rising edge of CS or RD. |
| D0–D7 (Pins 6, 7, 8, 9, 17, 18, 19, 20) | Three-state parallel data outputs | Latched, bus-compatible outputs directly drive 8-bit µP data buses; high-impedance when CS high. |
| GND (Pin 12) | Ground reference | Common return for analog and digital sections; must be low-impedance to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No external clock required | Internal timing generator eliminates clock distribution complexity and jitter sensitivity in compact layouts. |
| 1 µA power-down current | Enables multi-second sleep intervals between measurements in battery-powered remote sensors without voltage regulator dropout. |
| Internal track/hold | Removes need for external sample-and-hold circuitry, reducing BOM count and PCB area in portable medical or environmental monitors. |
| Ratiometric reference inputs | Allows direct interfacing with resistive sensors (e.g., RTDs, strain gauges) where REF+ ties to excitation voltage - eliminating ratio errors from supply drift. |
| Microprocessor-compatible interface | Appears as memory-mapped I/O or port-mapped device; no glue logic needed for 8051, ARM Cortex-M0, or PIC16 systems. |
Applications
| Portable Data Loggers | Battery-Powered Sensor Nodes |
|---|---|
Use Scenario: Continuous voltage/current monitoring of solar charge controllers or Li-ion battery packs in handheld field testers. IC Role / Device Role / Timing Role: 4-channel ADC digitizes cell voltages, shunt currents, and temperature sensor outputs at 400ksps with synchronized track/hold. Use Value: 1.8µs conversion enables sub-millisecond per-channel sampling across all four inputs, supporting real-time state-of-charge estimation. |
Use Scenario: Wireless environmental sensor modules measuring temperature, humidity, and CO₂ using analog-output transducers. IC Role / Device Role / Timing Role: ADC interfaces with ratiometric sensors while entering 1µA power-down between 10s-interval readings. Use Value: Ratiometric REF+/REF− eliminates need for separate precision voltage reference, reducing bill-of-materials cost and layout area. |
| Industrial System Health Monitors | Communications Equipment Diagnostics |
Use Scenario: On-board monitoring of power rail voltages, fan speeds, and thermal zones in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Digitizes analog health signals under µP control via RD/WR interface; uses MODE pin to select read or write-read mode. Use Value: 24-pin DIP package simplifies through-hole prototyping and field-replaceable module design in industrial enclosures. |
Use Scenario: Base station RF front-end calibration where bias voltages and detector outputs require periodic digitization. IC Role / Device Role / Timing Role: ADC samples analog control loops during maintenance windows; PWRDN pin disables conversion during active transmission. Use Value: Fast wake-up (<900 ns) allows rapid re-engagement after TX burst, minimizing diagnostic latency without sacrificing power efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, 8-bit, low-power ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX113EAG+ | Same silicon, 24-pin SSOP package (4.4mm width); identical electrical specs and timing. | Preferred for space-constrained PCBs requiring surface-mount assembly; same thermal profile but lower lead inductance. | Select MAX113EAG+ when automated SMT placement is required and board real estate is limited. |
| ADS7822U | 8-bit, 4-channel SAR ADC (TI); 2.7–5.25V supply; 2.5µs conversion; no internal track/hold; SPI interface only. | Requires external track/hold and level-shifting for +3V µP buses; lacks parallel interface and ratiometric REF− capability. | Choose ADS7822U only if SPI is mandatory and system already uses TI's power management ecosystem. |
Compared with MAX113EAG+, MAX113ENG+ offers through-hole reliability and easier hand-soldering for prototyping; compared with ADS7822U, it provides native 8-bit parallel interface, integrated track/hold, and true ratiometric dual-reference support - critical for sensor front-ends without external references.
Availability
MAX113ENG+ is available at Aetrix Electronics and suitable for battery-powered systems, portable equipment, and system-health monitoring applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX113ENG+ 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, automotive, and communications applications.
The MAX113ENG+ belongs to Maxim's legacy low-power ADC family targeting portable and remote sensing - engineered for minimal quiescent current, single-supply operation, and seamless µP integration without external support components.
FAQ
What is the operating temperature range of the MAX113ENG+?
The MAX113ENG+ is specified for −55°C to +125°C operation, making it suitable for harsh-environment applications such as under-hood automotive sensors or industrial motor controls. This wide range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet, and is distinct from commercial-grade variants like MAX113CNG (0°C to +70°C).
Does the MAX113ENG+ include an internal track/hold circuit?
Yes, the MAX113ENG+ integrates a track/hold amplifier that automatically enters hold mode upon conversion initiation (via RD or WR assertion) and returns to track mode after INT goes high. This eliminates external sample-and-hold components and is explicitly documented in the General Description, Functional Diagram, and Detailed Description sections of the datasheet.
Can the MAX113ENG+ operate from a +3.3V supply?
Yes, the MAX113ENG+ operates over a +3.0V to +3.6V supply range, fully covering +3.3V nominal systems. Electrical Characteristics tables confirm parameters (e.g., IDD = 1.5mA typ, tCRD = 1.8µs) are guaranteed at VDD = +3.0V, +3.3V, and +3.6V, with timing improving slightly at higher voltages per the Conversion Time vs. Supply Voltage graph.
How many analog input channels does the MAX113ENG+ support?
The MAX113ENG+ supports exactly four single-ended analog input channels: IN1 through IN4. This is defined in the Pin Configuration diagram, Truth Table for Input Channel Selection, and General Description - distinguishing it from the 8-channel MAX117 family. A2 is not bonded out on MAX113ENG+ and has no function.
Is the MAX113ENG+ pin-compatible with the MAX113CNG?
Yes, the MAX113ENG+ and MAX113CNG share identical 24-pin narrow plastic DIP footprints and pin functions, including VDD, PWRDN, A0/A1, IN1–IN4, REF+/REF−, RD, WR/RDY, INT, D0–D7, CS, MODE, and GND. Both comply with the same mechanical drawing and functional pinout - confirmed in the Pin Configurations and Ordering Information sections.
MAX113ENG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 4
- 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:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX113ENG+ FAQ
1.How can I place an order for MAX113ENG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX113ENG+ 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 MAX113ENG+ reliable?
The price and inventory of MAX113ENG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX113ENG+ is usually 5 days.
3.What payment methods are accepted for MAX113ENG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX113ENG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX113ENG+?
MAX113ENG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX113ENG+ 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 MAX113ENG+?
For technical support, including MAX113ENG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX113ENG+ requirements.
6.How does Aetrix verify that MAX113ENG+ is sourced from the original manufacturer or authorized distributors?
All MAX113ENG+ 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 MAX113ENG+ meets industry standards.
7.What is the process for return or replacement of MAX113ENG+?
All MAX113ENG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX113ENG+, 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 MAX113ENG+ part is unused and in its original packaging.
Return procedure for MAX113ENG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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