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Analog Devices Inc./Maxim Integrated MAX114CNG+
- Part No.:
- MAX114CNG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX114CNG+.pdf
- Description:
- IC ADC 8BIT FLASH 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,646
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Product details
Overview
MAX114CNG+ from Maxim Integrated is a microprocessor-compatible, 8-bit, 4-channel analog-to-digital converter (ADC) using half-flash architecture to achieve 1 Msps sampling rate and 660 ns conversion time. It operates from a single +5V supply, features an internal track/hold, ratiometric reference support, and 1 µA power-down current - enabling burst-mode data acquisition in portable instrumentation and remote sensing systems.
For engineers reviewing the MAX114CNG+ datasheet, MAX114CNG+ pinout, MAX114CNG+ application, or MAX114CNG+ equivalent, this page delivers verified technical context, real-world interface timing, channel selection logic, power-down recovery behavior, and validated alternatives for high-speed, low-power 8-bit ADC selection in embedded measurement systems.
Technical Context
The MAX114CNG+ implements a two-stage half-flash conversion: a 4-bit flash ADC generates the MSBs and drives an internal DAC to produce a residue voltage, which a second 4-bit flash stage converts into the LSBs - achieving full 8-bit resolution with only 15 comparators. Its analog multiplexer selects among four single-ended input channels (IN1–IN4) under A0–A2 address control.
Digital interface supports two modes: Read Mode (MODE = GND) uses RD as conversion trigger and RDY as status output; Write-Read Mode (MODE = VDD) initiates conversion on WR falling edge and latches MSBs before LSBs complete, enabling pipelined operation when WR and RD are tied. Conversion completes in ≤660 ns with tACQ ≥160 ns acquisition time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes over full-scale input range. |
| Sampling Rate | 1 Msps - supports real-time digitization of signals up to 500 kHz Nyquist bandwidth. |
| Conversion Time | 660 ns - enables tight timing budgets in burst-sampling systems with minimal latency. |
| Total Unadjusted Error | ≤ ±1 LSB - ensures monotonicity and no missing codes across temperature and supply variation. |
| Power-Down Current | 1 µA typical - reduces system-level standby power by >99% versus active mode (8–20 mA). |
| Input Full-Power Bandwidth | 1 MHz - allows accurate digitization of fast-rising transients without slew-induced error. |
| Reference Input Range | REF− = GND to REF+ ≤ VDD - supports ratiometric measurement when REF+ ties to sensor supply. |
Pinout & Package
MAX114CNG+ is housed in a 24-pin narrow plastic DIP (0.300" width), RoHS-compliant and lead-free per + suffix. Pin layout matches industry-standard 24-DIP footprint with 0.1" row spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 24) | Positive supply input | +5V ±5% main power rail; requires 4.7µF + 0.1µF bypassing to GND. |
| PWRDN (Pin 23) | Power-down enable | Logic-low entry into 1 µA standby; wake-up delay ≤200 ns + 360 ns acquisition. |
| A0–A2 (Pins 22, 21, -) | Multiplexer address inputs | Select IN1–IN4 (000–011); A2 unconnected on MAX114 (4-channel variant). |
| IN1–IN4 (Pins 5, 3, 2, 1) | Analog input channels | Single-ended, 32 pF input capacitance; max source impedance 800 Ω for tACQ = 160 ns. |
| REF+ (Pin 14), REF− (Pin 13) | Reference voltage terminals | Define full-scale (REF+) and zero-code (REF−) points; internal 1 kΩ divider draws current even in PWRDN. |
| CS (Pin 16), RD (Pin 10), WR/RDY (Pin 15) | Digital control interface | Active-low chip select; RD triggers conversion in Read Mode; WR initiates in Write-Read Mode; RDY is open-collector status. |
| D0–D7 (Pins 6, 7, 8, 9, 17, 18, 19, 20) | Three-state parallel data outputs | Latched, bus-compatible outputs; high-impedance when CS high or during conversion. |
| INT (Pin 11) | Interrupt output | Open-drain end-of-conversion flag; asserts low at completion, resets on rising CS or RD edge. |
| GND (Pin 12) | Analog/digital ground | Common return for VDD, REF−, and signal references; separate AGND/DGND not required. |
| MODE (Pin 5) | Interface mode select | Ground = Read Mode (RD-triggered); VDD = Write-Read Mode (WR-triggered with pipelining capability). |
Key Features
| Feature | Design Value |
|---|---|
| Half-flash conversion architecture | Reduces comparator count to 15 while maintaining 8-bit accuracy and 660 ns speed - lowering die area and dynamic power vs. full-flash. |
| Internal track/hold circuit | Enables faithful digitization of signals with >1 MHz full-power bandwidth without external sample-hold components. |
| Ratiometric reference support | Allows direct connection of REF+ to sensor excitation supply - eliminating gain drift errors in bridge or RTD measurements. |
| Microprocessor interface simplification | Direct 8-bit bus connection via three-state outputs; no glue logic needed for memory-mapped or I/O-port interfacing. |
| Burst-mode power optimization | 1 µA power-down current + <200 ns wake-up enables >99% average current reduction in intermittent sampling applications. |
Applications
| High-Speed Data Acquisition | Portable Test Equipment |
|---|---|
|
Use Scenario: Remote field sensors log voltage, temperature, or pressure at 100 ksps–1 Msps rates with battery-powered operation. IC Role / Device Role / Timing Role: Primary ADC capturing analog front-end signals; handles multiplexed 4-channel input with synchronized power-down between samples. Use Value: 660 ns conversion + 1 µA standby enables >10× longer battery life versus continuous-sampling ADCs at same throughput. |
Use Scenario: Handheld multimeters and oscilloscope probes digitize transient waveforms with minimal form factor and thermal budget. IC Role / Device Role / Timing Role: Core 8-bit digitizer interfaced directly to µP data bus; leverages internal track/hold to capture fast edges without external components. Use Value: Single +5V supply and 24-DIP package simplify PCB layout and reduce BOM count in space-constrained enclosures. |
| Communications Signal Monitoring | Industrial Sensor Interface |
|
Use Scenario: Baseband monitoring in RF receivers samples IF or RSSI signals for AGC or diagnostics at sub-µs intervals. IC Role / Device Role / Timing Role: High-speed ADC feeding DSP or FPGA; uses Write-Read Mode with pipelining to sustain 1 Msps with minimal µP overhead. Use Value: 1 MHz full-power bandwidth and ≤1 LSB TUE ensure fidelity of amplitude-modulated envelope detection. |
Use Scenario: PLC analog input modules condition and digitize 4–20 mA or thermocouple signals in noisy factory environments. IC Role / Device Role / Timing Role: Ratiometric ADC referenced to precision current source; rejects common-mode noise via REF− grounding strategy. Use Value: Total unadjusted error ≤±1 LSB and 1 µA power-down support SIL-2 functional safety compliance in periodic self-test routines. |
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 |
|---|---|---|---|
| MAX115CNG+ | Pin-compatible 4-channel upgrade with 10-bit resolution, 2.5 µs conversion, and 2.7–5.25V supply range. | Higher resolution required for precision sensor scaling; wider supply tolerance for mixed-voltage systems. | Choose MAX115CNG+ when 10-bit accuracy outweighs 3.8× slower conversion and higher cost. |
| ADS7822U | 8-bit, 200 ksps SAR ADC in MSOP-8; serial SPI interface; 2.7–5.25V operation; 1.2 µA standby. | Space-constrained designs needing serial interface and smaller footprint; lower throughput acceptable. | Choose ADS7822U for PCB area savings and SPI compatibility, but verify 200 ksps meets sampling requirement. |
Compared with MAX114CNG+, MAX115CNG+ trades speed for resolution and supply flexibility, while ADS7822U sacrifices parallel interface and throughput for size and serial simplicity - making MAX114CNG+ optimal for µP-based 1 Msps systems requiring minimal external logic and proven DIP reliability.
Availability
MAX114CNG+ is available at Aetrix Electronics and suitable for high-speed data acquisition, portable test equipment, communications signal monitoring, and industrial sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX114CNG+ 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, automotive, and communications markets.
The MAX114/MAX118 family was designed for microprocessor-based systems demanding fast, low-power, multi-channel digitization - targeting portable instrumentation, remote telemetry, and real-time control where parallel bus simplicity and burst-mode efficiency are critical.
FAQ
What is the maximum sampling rate achievable with MAX114CNG+ in Write-Read Mode?
The MAX114CNG+ achieves a maximum sampling rate of 1.23 Msps in Write-Read Mode with tRD < tINTL timing (tWR = 250 ns, tRD = 250 ns, tRI = 150 ns, tACQ = 160 ns). This assumes optimal external timing control and accounts for pipelined operation where WR and RD are coordinated to overlap conversion and read cycles - delivering sustained throughput exceeding the nominal 1 Msps rating.
Does MAX114CNG+ require an external clock source?
No, MAX114CNG+ does not require an external clock. All timing is generated internally using the half-flash architecture's control logic. The device relies solely on digital control signals (CS, RD, WR, MODE) for synchronization - eliminating clock distribution complexity and jitter sensitivity in µP-coupled systems.
How does the power-down mode affect reference current consumption in MAX114CNG+?
In MAX114CNG+ power-down mode, the internal 1 kΩ reference resistor between REF+ and REF− remains active, drawing current even at 1 µA total VDD supply current. To minimize reference load, an external N-channel MOSFET (e.g., IRML2402) can switch REF− to GND during PWRDN - reducing quiescent reference current to near-zero while preserving fast wake-up capability.
Can MAX114CNG+ interface directly with a 3.3V microprocessor data bus?
MAX114CNG+ digital outputs are 5V-tolerant and three-state, but its output high voltage (VOH) is specified at minimum 3.5V under 360 µA load - compatible with 3.3V µP inputs having VIH ≤ 3.5V. However, level-shifting is recommended if the µP requires strict 3.3V logic thresholds, as VOL ≤ 0.4V ensures reliable low-level recognition without added risk.
What is the purpose of the MODE pin on MAX114CNG+ and how should it be configured?
The MODE pin on MAX114CNG+ selects between Read Mode (MODE = GND) and Write-Read Mode (MODE = VDD). In Read Mode, RD initiates conversion and WR/RDY acts as RDY status output. In Write-Read Mode, WR starts conversion and INT signals completion - enabling pipelined operation. Tie MODE permanently to GND or VDD; do not float, as internal 50 µA pull-down ensures default Read Mode if left unconnected.
MAX114CNG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 1M
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX114CNG+ FAQ
1.How can I place an order for MAX114CNG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX114CNG+ 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 MAX114CNG+ reliable?
The price and inventory of MAX114CNG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX114CNG+ is usually 5 days.
3.What payment methods are accepted for MAX114CNG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX114CNG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX114CNG+?
MAX114CNG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX114CNG+ 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 MAX114CNG+?
For technical support, including MAX114CNG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX114CNG+ requirements.
6.How does Aetrix verify that MAX114CNG+ is sourced from the original manufacturer or authorized distributors?
All MAX114CNG+ 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 MAX114CNG+ meets industry standards.
7.What is the process for return or replacement of MAX114CNG+?
All MAX114CNG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX114CNG+, 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 MAX114CNG+ part is unused and in its original packaging.
Return procedure for MAX114CNG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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