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Analog Devices Inc./Maxim Integrated MAX113CNG
- Part No.:
- MAX113CNG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX113CNG.pdf
- Description:
- IC ADC 8BIT FLASH 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,067
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Product details
Overview
The MAX113CNG 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 MAX113CNG datasheet, MAX113CNG pinout, MAX113CNG application, or MAX113CNG equivalent, this device supports ratiometric operation with REF+/REF− inputs, direct 8-bit parallel µP interface via latched three-state outputs, and burst-mode power management via PWRDN - critical for low-duty-cycle sensing systems requiring fast wake-up (<900ns) and minimal supply current.
Technical Context
The MAX113CNG implements a two-stage half-flash conversion: a 4-bit flash ADC generates MSBs and drives an internal DAC to produce a residue voltage, which a second 4-bit flash stage converts to LSBs - achieving 8-bit resolution with only 15 comparators. It uses an internal analog multiplexer controlled by A0–A2 to select among four single-ended input channels (IN1–IN4).
Digital interface operates in Read Mode (MODE = 0) or Write-Read Mode (MODE = 1), supporting memory-mapped or I/O-port µP connection without external logic. WR/RDY serves dual function: write control or ready-status output; INT signals end-of-conversion; PWRDN enables sub-µA shutdown with full recovery in <900ns including track/hold acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes over full-scale input range |
| Conversion Time | 1.8µs per channel - enables 400ksps sampling rate in WR-RD mode |
| Total Unadjusted Error | ≤ ±1 LSB - ensures monotonicity and no missing codes across temperature |
| Supply Voltage | +3.0V to +3.6V - single-supply operation compatible with Li-ion and regulated 3.3V rails |
| Power-Down Current | 1µA typical - reduces average power in burst-mode sensing intervals |
| Input Channels | 4 single-ended (IN1–IN4) - selected via 3-bit address A0–A2 |
| Reference Input | Ratiometric REF+/REF− - allows measurement independence from supply variation |
| Track/Hold | Integrated - captures fast analog transients without external circuitry |
Pinout & Package
MAX113CNG is housed in a 24-pin narrow plastic DIP package (0°C to +70°C operating range), with 0.3-inch body width and through-hole mounting compatibility.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | IN1–IN4 | Analog input channels - accept single-ended signals referenced to REF− |
| 5 | MODE | Interface mode select - low = Read Mode, high = Write-Read Mode |
| 6 | D0 | Data output (LSB) - three-state, latched, directly connects to 8-bit µP data bus |
| 7, 8, 9 | D1–D3 | Data outputs - part of parallel 8-bit output bus with D0–D7 |
| 10 | RD | Read strobe input - initiates data access in Read Mode; controls output enable in Write-Read Mode |
| 11 | INT | Interrupt output - open-collector, active-low signal indicating conversion completion |
| 12 | GND | Analog/digital ground reference - common return for VDD, REF−, and inputs |
| 13 | REF− | Reference lower bound - sets zero-code voltage; must be ≥ GND and < REF+ |
| 14 | REF+ | Reference upper bound - sets full-scale voltage; internally connected to IN8 on MAX117 only |
| 15 | WR/RDY | Dual-function pin - write control in Write-Read Mode, ready-status output in Read Mode |
| 16 | CS | Chip-select input - enables WR/RD decoding; must be low for interface activity |
| 17, 18, 19 | D4–D6 | Data outputs - complete 8-bit parallel output path with D0–D3 and D7 |
| 20 | D7 | Data output (MSB) - synchronized with other D0–D6 outputs during valid read window |
| 21, 22 | A1, A0 | Multiplexer address LSBs - select IN1–IN4 with A2 (pin 23) in Read/Write-Read Mode |
| 23 | PWRDN | Power-down control - logic low reduces VDD current to 1µA; wake-up time <900ns |
| 24 | VDD | Positive supply - accepts +3.0V to +3.6V; requires 4.7µF + 0.1µF bypassing to GND |
Key Features
| Feature | Design Value |
|---|---|
| No external clock required | Internal timing control eliminates need for external oscillator or clock distribution |
| Ratiometric reference inputs | REF+/REF− configuration enables accurate measurements independent of supply rail drift |
| 1.8µs conversion time | Supports real-time sampling of signals up to ~30kHz input bandwidth (full-power) |
| 1µA power-down current | Enables >1000× current reduction between conversions in low-duty-cycle sensor nodes |
| Latched three-state outputs | Direct 8-bit bus interfacing without glue logic - compatible with 8051, Z80, and similar µPs |
| Internal track/hold | Acquires and holds analog input during conversion - removes need for external sample-hold IC |
Applications
| Battery-Powered Data Loggers | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous voltage/current monitoring in handheld ECG or pulse oximeter units powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: ADC digitizes analog front-end signals (e.g., amplified biopotentials) at 100–400ksps with burst-mode sleep/wake cycles. Use Value: 1µA power-down current extends battery life; 1.8µs conversion enables high-fidelity waveform capture without external timing components. |
Use Scenario: Real-time analog signal conditioning in portable glucose meters or wearable vital sign monitors. IC Role / Device Role / Timing Role: Converts sensor bridge outputs (e.g., thermistor, photodiode) into digital values for µP processing and display. Use Value: Ratiometric REF+/REF− operation maintains accuracy despite battery voltage sag; integrated track/hold rejects noise during sampling. |
| Industrial System-Health Monitoring | Remote Environmental Sensors |
Use Scenario: Periodic voltage, temperature, and current measurements in PLC I/O modules or motor drive diagnostics. IC Role / Device Role / Timing Role: Digitizes multiple analog feedback signals (IN1–IN4) under µP command for fault detection and logging. Use Value: Four-channel multiplexing reduces component count; 400ksps throughput supports rapid multi-point scanning without external MUX control logic. |
Use Scenario: Low-power environmental sensing nodes deployed in agriculture or infrastructure monitoring (e.g., soil moisture, air quality). IC Role / Device Role / Timing Role: ADC samples analog sensor outputs once per minute or hour, then enters deep power-down until next wake event. Use Value: Sub-µA shutdown current minimizes quiescent drain; fast 900ns wake-up ensures precise timing alignment with µP wake interrupts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, low-power, multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX114CNG | +5V supply only; identical 4-channel, 8-bit, 1.8µs architecture but higher supply current (3mA active) | Requires 5V rail; not suitable for 3V-only systems or battery operation below 4.5V | Select MAX114CNG only when legacy 5V µP bus and higher speed tolerance justify increased power |
| ADS7822U | 2.7–5.25V supply; SPI interface (not parallel); 1µs conversion; 1.25mW active power vs. MAX113CNG's 4.5mW | Serial interface reduces pin count but adds µP firmware overhead; no native µP bus compatibility | Choose ADS7822U for space-constrained designs where SPI is preferred and µP has no 8-bit parallel port |
Compared with MAX114CNG and ADS7822U, the MAX113CNG uniquely combines 3V operation, parallel µP interface, and 1µA shutdown - making it optimal for cost-sensitive, battery-powered systems needing direct bus connectivity and ultra-low quiescent current.
Availability
MAX113CNG is available at Aetrix Electronics and suitable for battery-powered data loggers, portable medical sensors, industrial system-health monitoring, remote environmental sensors, and communications subsystems requiring stable component supply across extended production lifecycles.
Supply support for MAX113CNG 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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX113CNG belongs to Maxim's legacy low-power ADC product line, engineered specifically for 3V battery-operated systems demanding fast conversion, minimal standby current, and simple µP integration without external timing or interface logic.
FAQ
What is the operating temperature range of the MAX113CNG?
The MAX113CNG is specified for 0°C to +70°C ambient operation, matching its "C" grade designation. This commercial-grade temperature range suits indoor portable equipment, consumer instrumentation, and non-automotive industrial applications where extreme thermal stress is absent. The MAX113CNG does not support extended or military temperature ranges - those require MAX113E or MAX113M variants.
How does the MAX113CNG achieve 1.8µs conversion time?
The MAX113CNG achieves 1.8µs conversion time using a half-flash architecture: a 4-bit flash ADC first resolves the MSBs, then an internal DAC generates a residue voltage that a second 4-bit flash stage converts to LSBs. This two-stage approach delivers 8-bit accuracy faster than successive-approximation while using fewer comparators than full-flash - enabling the MAX113CNG to sustain 400ksps throughput in WR-RD mode.
Can the MAX113CNG operate with a 2.5V reference voltage?
Yes, the MAX113CNG supports ratiometric operation with any REF+ and REF− pair within its absolute ratings (GND ≤ REF− < REF+ ≤ VDD). A 2.5V reference applied to REF+ (with REF− = GND) yields a 0–2.5V input range and 9.77mV/LSB step size. The MAX113CNG's internal reference resistance (1kΩ typical) must be considered when sourcing REF+ externally - decoupling capacitors (e.g., 4.7µF + 0.1µF) are mandatory for stability.
What is the purpose of the MODE pin on the MAX113CNG?
The MODE pin on the MAX113CNG selects between two digital interface modes: MODE = 0 configures Read Mode (WR/RDY acts as RDY status output), while MODE = 1 enables Write-Read Mode (WR/RDY acts as write strobe). This flexibility allows the MAX113CNG to interface directly with memory-mapped or I/O-mapped microprocessors without external logic - simplifying PCB layout and firmware design for both legacy and modern µP architectures.
Does the MAX113CNG include input protection diodes?
Yes, the MAX113CNG integrates internal ESD protection diodes on all analog input pins (IN1–IN4), clamping voltages to GND −0.3V and VDD +0.3V. These diodes prevent damage from transient overvoltage but do not guarantee accurate conversion if inputs exceed GND +50mV or VDD −50mV - especially near full-scale or zero-scale codes. For robust front-end protection beyond ±0.3V, external series resistors or TVS devices are recommended alongside the MAX113CNG.
MAX113CNG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX113CNG FAQ
1.How can I place an order for MAX113CNG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX113CNG 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 MAX113CNG reliable?
The price and inventory of MAX113CNG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX113CNG is usually 5 days.
3.What payment methods are accepted for MAX113CNG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX113CNG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX113CNG?
MAX113CNG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX113CNG 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 MAX113CNG?
For technical support, including MAX113CNG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX113CNG requirements.
6.How does Aetrix verify that MAX113CNG is sourced from the original manufacturer or authorized distributors?
All MAX113CNG 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 MAX113CNG meets industry standards.
7.What is the process for return or replacement of MAX113CNG?
All MAX113CNG units undergo pre-shipment inspection (PSI). If there is an issue with MAX113CNG, 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 MAX113CNG part is unused and in its original packaging.
Return procedure for MAX113CNG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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