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Analog Devices Inc./Maxim Integrated MAX114CAG+
- Part No.:
- MAX114CAG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX114CAG+.pdf
- Description:
- IC ADC 8BIT FLASH 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:134
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Product details
Overview
MAX114CAG+ from Maxim Integrated is a microprocessor-compatible, 8-bit, 4-channel analog-to-digital converter (ADC) using half-flash architecture to achieve 660ns conversion time (1Msps) with single +5V supply operation. It features internal track/hold, ratiometric reference configuration, and power-down mode reducing supply current to 1µA. It targets high-speed data acquisition in portable and remote systems requiring fast burst-mode sampling.
For engineers reviewing the MAX114CAG+ datasheet, MAX114CAG+ pinout, MAX114CAG+ application, or MAX114CAG+ equivalent, this page delivers verified technical context, real-world interface timing, confirmed analog input behavior, and validated alternative options for embedded signal acquisition designs.
Technical Context
The MAX114CAG+ implements a two-stage half-flash ADC architecture: a 4-bit flash section generates MSBs and a residue voltage, which is then digitized by a second 4-bit flash section to produce the full 8-bit result. Its internal analog multiplexer selects among four single-ended analog inputs under A0–A2 address control.
Digital interface supports two modes: Read Mode (MODE = GND) uses RD to initiate conversion and read data, with WR/RDY acting as ready-status output; Write-Read Mode (MODE = VDD) uses WR to start conversion and RD to latch final data, enabling pipelined operation when WR and RD are tied together.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - defines quantization step size of (VREF+ − VREF−)/256 for linear binary coding. |
| Conversion Time | 660ns - enables 1Msps sampling rate in WR-RD mode with tRD < tINTL, critical for high-speed DSP input capture. |
| Total Unadjusted Error | ≤ ±1LSB - guarantees monotonicity and no missing codes across full temperature range (0°C to +70°C). |
| Power-Down Current | 1µA typical - allows ultra-low quiescent power during idle intervals in battery-powered burst-mode systems. |
| Input Full-Power Bandwidth | 1MHz - supports accurate digitization of signals up to 1MHz without attenuation in track mode. |
| Supply Voltage | +4.75V to +5.25V - tight tolerance ensures stable operation with standard 5V logic rails and minimal regulation overhead. |
| SINAD | 45dB at 195.8kHz input - corresponds to ~7.2 effective bits, confirming usable dynamic range for medium-fidelity acquisition. |
Pinout & Package
MAX114CAG+ is housed in a 24-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, JEDEC MO-153 compliant, footprint compatible with narrow DIP but offering higher density and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 24) | Positive supply input | Accepts +4.75V to +5.25V; requires 4.7µF + 0.1µF bypassing to GND for noise immunity. |
| PWRDN (Pin 23) | Power-down control | Logic low reduces supply current to ~1µA; must be driven to rail for reliable shutdown. |
| A0–A2 (Pins 22, 21, -) | Multiplexer channel address | 3-bit binary select for IN1–IN4; A2 not bonded in MAX114, leaving only A0/A1 functional per datasheet pin map. |
| IN1–IN4 (Pins 5, 3, 2, 1) | Analog input channels | Single-ended inputs; each internally connected to track/hold; max swing GND−0.3V to VDD+0.3V. |
| REF+ (Pin 14) | Reference upper bound | Sets full-scale code (11111111); internally hard-wired to IN8 in MAX118 only - not applicable to MAX114CAG+. |
| REF− (Pin 13) | Reference lower bound | Sets zero-code voltage (00000000); range GND ≤ VREF− < VREF+; requires 0.1µF bypass. |
| GND (Pin 12) | Analog/digital ground | Common return for reference, analog inputs, and digital I/O; must be low-impedance plane. |
| INT (Pin 11) | Interrupt output | Open-drain active-low signal indicating end of conversion; resets on rising edge of CS or RD. |
| RD (Pin 10) | Read control / status | In Read Mode: initiates conversion and reads data; in Write-Read Mode: latches LSBs after INT assertion. |
| WR/RDY (Pin 15) | Write-control / ready output | In Read Mode: functions as RDY (open-collector ready signal); in Write-Read Mode: WR starts conversion. |
| CS (Pin 16) | Chip-select input | Must be low for RD/WR recognition; controls INT reset and enables three-state outputs. |
| D0–D7 (Pins 6, 7, 8, 9, 17, 18, 19, 20) | Parallel data outputs | Latched, three-state buffers directly interfacing to 8-bit µP data bus; VOL ≤ 0.4V at 2.6mA sink. |
| MODE (Pin 5) | Interface mode select | Internally pulled low via 50µA current source; MODE = 0 → Read Mode, MODE = 1 → Write-Read Mode. |
Key Features
| Feature | Design Value |
|---|---|
| Half-flash conversion architecture | Enables 660ns conversion with only 15 comparators-reducing die area and power vs. full-flash 8-bit ADCs. |
| Integrated track/hold circuit | Allows accurate digitization of fast analog signals up to 1MHz without external components. |
| Ratiometric reference configuration | Permits direct use of system supply (e.g., +5V) as REF+, eliminating need for precision external reference in many applications. |
| 1µA power-down current | Supports energy-efficient burst-mode operation in portable equipment where ADC is active only intermittently. |
| No external clock required | Internal timing control simplifies system design-no clock generator, routing, or jitter management needed. |
Applications
| High-Speed Data Acquisition | Portable Test Equipment |
|---|---|
Use Scenario: Real-time voltage monitoring across four sensor channels in field-deployable environmental loggers. IC Role / Device Role / Timing Role: 4-channel ADC digitizing thermistor, pressure, humidity, and battery voltage signals at 1Msps burst rate. Use Value: 660ns conversion time and 1µA power-down enable rapid sampling followed by extended sleep-extending battery life beyond 12 months. | Use Scenario: Handheld oscilloscope front-end capturing transient waveforms in industrial maintenance tools. IC Role / Device Role / Timing Role: Primary ADC acquiring analog inputs with internal track/hold to preserve signal integrity during conversion. Use Value: 1MHz full-power bandwidth and ≤±1LSB error ensure faithful reproduction of fast edges and amplitude accuracy within 0.4% FS. |
| Remote Sensor Nodes | Communications Baseband Monitoring |
Use Scenario: Wireless node measuring line voltage, current, and temperature in smart-grid endpoint meters. IC Role / Device Role / Timing Role: Low-power ADC performing periodic multi-channel sampling before RF transmission. Use Value: Ratiometric operation eliminates separate reference IC; SSOP package enables compact PCB layout in space-constrained enclosures. | Use Scenario: Monitoring analog control voltages and signal levels in cellular base station transceiver modules. IC Role / Device Role / Timing Role: System health monitor digitizing bias points, PA temperature, and supply ripple on auxiliary channels. Use Value: Four dedicated inputs simplify routing; 45dB SINAD provides sufficient SNR for diagnostic-level signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, 4-channel, parallel-interface ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit resolution, SPI interface, 200kSPS max, +2.7V to +5.25V supply | Higher resolution but slower speed and serial interface-requires firmware changes and level-shifting for µP integration. | Select when precision > speed and board space permits added SPI support logic. |
| MAX113CAG+ | +3V supply only, same 4-channel 8-bit architecture, 660ns conversion, identical SSOP-24 package | Direct drop-in replacement for +3V systems; incompatible with +5V rails due to absolute max ratings. | Choose for existing +3V designs needing identical timing and pinout-no layout change required. |
Compared with ADS7822U and MAX113CAG+, the MAX114CAG+ uniquely balances 1Msps speed, +5V compatibility, and parallel µP interface in SSOP-24-making it optimal for legacy 5V microcontroller systems requiring minimal firmware or hardware modification.
Availability
MAX114CAG+ is available at Aetrix Electronics and suitable for high-speed data acquisition, portable test instrumentation, and remote sensor node applications requiring stable component supply and long-term industrial availability.
Supply support for MAX114CAG+ 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, communications, and consumer markets.
The MAX114CAG+ belongs to Maxim's precision data-acquisition product line, designed specifically for microprocessor-based systems needing fast, low-power, multi-channel digitization without external clocks or complex interface logic.
FAQ
What is the maximum sampling rate achievable with MAX114CAG+?
The MAX114CAG+ achieves a maximum sampling rate of 1.23Msps in Write-Read Mode with tRD < tINTL timing (tWR + tRD + tRI + tACQ = 250ns + 250ns + 150ns + 160ns). This assumes optimal µP timing control and proper decoupling. At 1Msps, the device maintains guaranteed 45dB SINAD and ≤±1LSB total unadjusted error across 0°C to +70°C.
Does MAX114CAG+ require an external clock source?
No, the MAX114CAG+ does not require an external clock. All timing is generated internally using the half-flash architecture's control logic. The conversion sequence is initiated solely by RD or WR pulses, and the 660ns conversion time is fixed and guaranteed under specified supply and temperature conditions-eliminating clock distribution, jitter, and synchronization concerns.
How does the power-down mode function on MAX114CAG+?
Driving PWRDN low places MAX114CAG+ into power-down mode, reducing VDD supply current to 1µA typical. The device wakes in <200ns and enters track mode; full acquisition requires 360ns (power-up delay + tACQ). For lowest current, all digital inputs must be driven to VDD or GND during power-down-floating inputs increase leakage.
Can MAX114CAG+ operate with a ratiometric reference using the +5V supply?
Yes, MAX114CAG+ supports ratiometric operation: connect REF+ to VDD (+5V) and REF− to system ground. This configures the full-scale input range as 0V to +5V, making ADC output independent of VDD drift. Input channels IN1–IN4 remain valid, and total unadjusted error remains ≤±1LSB-ideal for systems where supply and signal share the same rail.
What is the purpose of the MODE pin on MAX114CAG+?
The MODE pin selects the digital interface protocol: MODE = GND (internally pulled low) enables Read Mode where RD initiates conversion and reads data, and WR/RDY acts as a ready-status output; MODE = VDD enables Write-Read Mode where WR starts conversion and RD latches the result. This dual-mode flexibility allows optimization for either simple wait-state µPs or high-throughput pipelined architectures.
MAX114CAG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- 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-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX114CAG+ FAQ
1.How can I place an order for MAX114CAG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX114CAG+ 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 MAX114CAG+ reliable?
The price and inventory of MAX114CAG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX114CAG+ is usually 5 days.
3.What payment methods are accepted for MAX114CAG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX114CAG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX114CAG+?
MAX114CAG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX114CAG+ 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 MAX114CAG+?
For technical support, including MAX114CAG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX114CAG+ requirements.
6.How does Aetrix verify that MAX114CAG+ is sourced from the original manufacturer or authorized distributors?
All MAX114CAG+ 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 MAX114CAG+ meets industry standards.
7.What is the process for return or replacement of MAX114CAG+?
All MAX114CAG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX114CAG+, 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 MAX114CAG+ part is unused and in its original packaging.
Return procedure for MAX114CAG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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