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Analog Devices Inc./Maxim Integrated MX7824KCWG+
- Part No.:
- MX7824KCWG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MX7824KCWG+.pdf
- Description:
- IC ADC 8BIT FLASH 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,193
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Product details
Overview
MX7824KCWG+ from Maxim Integrated is a high-speed, 4-channel, 8-bit analog-to-digital converter (ADC) with 2.5 µs conversion time, single +5V supply operation, and built-in track/hold. It features a multiplexed analog input architecture, latched three-state data outputs for direct microprocessor bus interfacing, and operates across 0°C to +70°C. It is used in real-time data acquisition systems requiring fast sampling without external sample-and-hold circuitry.
For engineers reviewing the MX7824KCWG+ datasheet, MX7824KCWG+ pinout, MX7824KCWG+ application, or MX7824KCWG+ equivalent, key selection considerations include its 4-channel multiplexer configuration, 8-bit resolution with ±1/2 LSB total unadjusted error, Mode 0/Mode 1 digital interface flexibility, and compatibility with AD7824-based designs.
Technical Context
The MX7824KCWG+ employs a half-flash architecture using two 4-bit flash ADC sections and an internal DAC to generate the full 8-bit result in 2.5 µs. Its analog front-end includes integrated track/hold functionality, eliminating external components for many signal sources.
Digital control relies solely on CS and RD inputs, supporting two interface modes: Mode 0 (WAIT-state compatible, INT- and RDY-driven) and Mode 1 (non-WAIT, pipelined read). The device uses VREF+/VREF− inputs to define the 0V–5V input range and supports direct connection to microprocessor data buses via latched, three-state outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for precise digitization of analog signals within 0V–5V range. |
| Conversion Time | 2.5 µs - enables up to 400 kHz maximum sampling rate per channel, suitable for real-time signal capture. |
| Total Unadjusted Error | ±1/2 LSB - ensures high accuracy without calibration, critical for measurement-critical applications like telecom and servo control. |
| Analog Input Channels | 4-channel multiplexer - allows sequential sampling of four independent analog sources with single-device integration. |
| Supply Voltage | +5V only - simplifies power design by eliminating dual-supply requirements and reducing board-level complexity. |
| Reference Interface | External VREF+/VREF− pins - supports flexible reference configurations including rail-to-rail or precision external references. |
| Digital Interface | CS + RD control only - eliminates need for address decoding logic or additional timing controllers in microprocessor systems. |
Pinout & Package
MX7824KCWG+ is housed in a 24-pin Wide SO (Small Outline) package, RoHS-compliant and surface-mountable. Pin count and layout match industry-standard 24-WSOIC footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | AIN1–AIN4 | Analog input channels - multiplexed 4-channel inputs accepting 0V–5V signals; internally sampled via track/hold. |
| 5, 6 | A0, A1 | Multiplexer address inputs - select one of four analog channels (00=AIN1, 01=AIN2, 10=AIN3, 11=AIN4). |
| 7–14 | DB0–DB7 | Latched three-state data outputs - directly drive microprocessor data bus; high-impedance when CS or RD inactive. |
| 15 | INT | Open-drain interrupt output - goes low at conversion completion; used to trigger CPU service or synchronize data reads. |
| 16 | GND | Analog/digital ground reference - common return path for analog inputs, digital logic, and reference circuitry. |
| 17 | VREF− | Reference lower bound - sets zero-code voltage; must be connected between GND and VREF+ to define input range. |
| 18 | VREF+ | Reference upper bound - sets full-scale voltage; accepts 0V to VDD (typically +5V) to configure 0V–5V input span. |
| 19 | RDY | Open-drain ready output - driven low on CS assertion, returns high-impedance at conversion end; connects to CPU WAIT input. |
| 20 | RD | Read control input - falling edge initiates conversion and/or latches data depending on interface mode (Mode 0/1). |
| 21 | CS | Chip-select input - must be low to enable device operation, address latching, and data output drivers. |
| 22 | VDD | +5V power supply - powers all analog and digital circuitry; requires 47µF + 0.1µF bypassing for stable operation. |
| 23, 24 | NC | No-connect pins - unused; must remain unconnected per datasheet guidance to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in track/hold | Eliminates need for external S/H circuitry, reducing BOM cost and PCB area while maintaining 2.5 µs conversion integrity. |
| Single +5V supply | Removes requirement for ±5V or +5V/–5V supplies, enabling simpler power architecture and improved system reliability. |
| 2.5 µs conversion time | Supports 400 kHz aggregate sampling rate, sufficient for audio-band and high-speed servo loop applications. |
| Memory-mapped or I/O-port interface | Appears as memory location or peripheral port without glue logic, easing integration into 8051, Z80, or 68K-based systems. |
| Pin-compatible with AD7824 | Enables drop-in replacement in legacy Analog Devices-based designs, preserving layout and firmware compatibility. |
Applications
| Telecommunications Signal Monitoring | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Real-time monitoring of line voltage, current, and tone detection in voice/data access equipment. IC Role / Device Role / Timing Role: 4-channel ADC digitizing conditioned analog signals from bandpass filters and amplifiers before DSP processing. Use Value: 2.5 µs conversion enables 10 kHz bandwidth capture without aliasing, meeting ITU-T G.711 sampling requirements. |
Use Scenario: Acquiring sensor or feedback signals for adaptive filtering, FFT analysis, or spectral estimation in embedded DSP systems. IC Role / Device Role / Timing Role: High-speed data acquisition node feeding parallel or sequential samples into fixed-point DSP cores. Use Value: Latched three-state outputs allow direct bus connection, minimizing latency and eliminating interface logic overhead. |
| High-Speed Servo Control Loop | Audio Instrumentation Sampling |
Use Scenario: Closed-loop position/velocity feedback in industrial motion controllers where sub-µs jitter impacts stability. IC Role / Device Role / Timing Role: Digitizing encoder analog outputs or current-sense amplifier signals for real-time PID computation. Use Value: Built-in track/hold ensures consistent sampling aperture, reducing phase error in feedback paths operating above 20 kHz. |
Use Scenario: Capturing test tones, distortion measurements, or microphone preamp outputs in benchtop audio analyzers. IC Role / Device Role / Timing Role: Precision 8-bit digitizer for mid-frequency audio characterization (up to 10 kHz) with minimal external support. Use Value: ±1/2 LSB error specification guarantees repeatable amplitude accuracy essential for THD+N and SNR validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, 8-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7824BQ | Same pinout, identical 4-channel 8-bit architecture, but specified over –40°C to +85°C; ±1 LSB error (vs. ±1/2 LSB for MX7824KCWG+). | Preferred for extended temperature industrial environments; slightly relaxed accuracy tolerance acceptable in non-critical monitoring. | Select AD7824BQ when operating beyond 0°C–70°C range and ±1 LSB error is sufficient for system requirements. |
| MAX154ACNG+ | Pin-compatible 4-channel 8-bit ADC with integrated 2.5V reference; same 2.5 µs conversion time but requires no external VREF+/-. | Suitable where board space or reference sourcing is constrained; not usable if external reference control or 0V–5V scaling is required. | Choose MAX154ACNG+ when internal reference simplifies design and eliminates need for external reference components. |
Compared with AD7824BQ and MAX154ACNG+, the MX7824KCWG+ offers tighter ±1/2 LSB accuracy and commercial-temperature optimization, making it ideal for cost-sensitive, high-volume data acquisition where reference flexibility and precision outweigh extended temperature needs.
Availability
MX7824KCWG+ is available at Aetrix Electronics and suitable for high-speed data acquisition, telecommunications infrastructure, and industrial servo control applications requiring stable component supply and long-term manufacturability.
Supply support for MX7824KCWG+ 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 computing markets.
The MX7824KCWG+ belongs to Maxim's legacy high-speed ADC product line, designed specifically for cost-effective, microprocessor-centric data acquisition systems demanding speed, simplicity, and pin compatibility with industry-standard converters.
FAQ
What is the maximum sampling rate achievable with the MX7824KCWG+?
The MX7824KCWG+ achieves a maximum sampling rate of 400 kHz, calculated from its 2.5 µs conversion time plus minimum 500 ns delay between conversions. This allows full utilization of its 4-channel multiplexer in time-division multiplexed systems, delivering up to 100 kHz per channel-well above the Nyquist rate for 10 kHz input bandwidths. The MX7824KCWG+ maintains this rate under standard +5V supply and 0°C to +70°C conditions.
Does the MX7824KCWG+ include an internal voltage reference?
No, the MX7824KCWG+ does not include an internal voltage reference. It requires external VREF+ and VREF− connections to define the analog input range (e.g., 0V to +5V). This differs from the MAX154/MAX158 family, which integrates a 2.5V reference. The MX7824KCWG+'s external reference architecture provides design flexibility for precision scaling, ratiometric measurements, or noise-reduced reference sources.
How does the MX7824KCWG+ interface with a microprocessor data bus?
The MX7824KCWG+ interfaces directly with microprocessor data buses using latched, three-state DB0–DB7 outputs and simple CS/RD control. In Mode 0, it appears as a memory-mapped peripheral; in Mode 1, as an I/O port. No address decoding logic is needed-the device responds to CS and RD edges alone. The MX7824KCWG+'s outputs drive standard TTL/CMOS loads and support direct connection to 8051, Z80, or 68000-family buses without bus transceivers.
Is the MX7824KCWG+ pin-compatible with Analog Devices AD7824?
Yes, the MX7824KCWG+ is explicitly pin-compatible with Analog Devices' AD7824 series, as confirmed in the datasheet's ordering information and pin configuration sections. Both devices share identical 24-pin SO/Wide SO footprints, matching pin functions (e.g., AIN1–AIN4, DB0–DB7, CS, RD, INT, RDY), and electrical interface behavior. This enables drop-in replacement in existing AD7824-based layouts without PCB revision.
What are the recommended power supply decoupling practices for the MX7824KCWG+?
Maxim specifies a 47 µF electrolytic capacitor and a 0.1 µF ceramic capacitor in parallel, placed as close as possible to the MX7824KCWG+ VDD pin with minimal lead length. This dual-capacitor network suppresses both low- and high-frequency supply noise, preventing conversion errors and reference instability. The 0.1 µF capacitor must be ceramic (not tantalum or electrolytic) to ensure effective high-frequency bypassing; longer leads degrade performance due to inductance.
MX7824KCWG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MX7824KCWG+ FAQ
1.How can I place an order for MX7824KCWG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MX7824KCWG+ 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 MX7824KCWG+ reliable?
The price and inventory of MX7824KCWG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX7824KCWG+ is usually 5 days.
3.What payment methods are accepted for MX7824KCWG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX7824KCWG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX7824KCWG+?
MX7824KCWG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX7824KCWG+ 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 MX7824KCWG+?
For technical support, including MX7824KCWG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX7824KCWG+ requirements.
6.How does Aetrix verify that MX7824KCWG+ is sourced from the original manufacturer or authorized distributors?
All MX7824KCWG+ 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 MX7824KCWG+ meets industry standards.
7.What is the process for return or replacement of MX7824KCWG+?
All MX7824KCWG+ units undergo pre-shipment inspection (PSI). If there is an issue with MX7824KCWG+, 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 MX7824KCWG+ part is unused and in its original packaging.
Return procedure for MX7824KCWG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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