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Analog Devices Inc./Maxim Integrated MX7824LCWG+
- Part No.:
- MX7824LCWG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MX7824LCWG+.pdf
- Description:
- IC ADC 8BIT HS 24-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,460
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Product details
Overview
MX7824LCWG+ 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, built-in track/hold, and 0V to +5V analog input range. It serves as a compact data acquisition front-end in real-time signal capture systems requiring fast sampling without external sample-and-hold circuitry.
For engineers reviewing the MX7824LCWG+ datasheet, MX7824LCWG+ pinout, MX7824LCWG+ application, or MX7824LCWG+ equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed package mapping (24-pin Wide SO), and two rigorously cross-referenced alternative parts for design continuity and sourcing flexibility.
Technical Context
The MX7824LCWG+ employs a half-flash architecture with dual 4-bit flash ADC sections and an internal DAC to generate the full 8-bit result in 2.5 µs. Its analog input stage includes integrated track/hold and supports multiplexed 4-channel acquisition with address inputs A0 and A1.
Digital interface operates in Mode 0 (WAIT-state compatible) or Mode 1 (non-WAIT), using only CS and RD control lines. Output data appears on latched, three-state DB0–DB7 lines, with open-drain RDY and active-low INT signals for timing synchronization and conversion status indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes across full-scale input range. |
| Conversion Time | 2.5 µs - enables up to 400 kHz maximum aggregate sampling rate (100 kHz per channel). |
| Analog Input Range | 0 V to +5 V - compatible with standard TTL/CMOS logic-level sensor outputs and op-amp drivers. |
| Total Unadjusted Error | ±1/2 LSB - ensures monotonicity and no missing codes over temperature (0°C to +70°C). |
| Supply Voltage | +5 V ±5% - operates directly from standard logic rail without regulation overhead. |
| Input Capacitance | 45 pF - defines required source impedance limit (<100 Ω) for <1 µs settling during track phase. |
| Power Dissipation | 75 mW typical - supports dense PCB layouts without forced cooling in industrial enclosures. |
Pinout & Package
MX7824LCWG+ is housed in a 24-pin Wide SO (Small Outline) package with gull-wing leads, 0.600" body width, and 0.050" lead pitch. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard counter-clockwise convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | AIN1–AIN4 | Analog input channels - multiplexed 4-channel single-ended inputs referenced to VREF− and VREF+. |
| 5, 6 | A0, A1 | Multiplexer address inputs - select one of four analog channels (00 = AIN1, 11 = AIN4). |
| 7 | VREF− | Lower reference voltage - sets zero-code point; must be connected between GND and VREF+. |
| 8 | VREF+ | Upper reference voltage - sets full-scale code; accepts 0 V to VDD (typically +5 V). |
| 9 | GND | Analog ground - dedicated return path for analog inputs and reference circuitry. |
| 10 | INT | Interrupt output - active-low open-collector signal indicating conversion completion. |
| 11 | RDY | Ready output - open-drain status signal tied to microprocessor WAIT input in Mode 0. |
| 12 | CS | Chip-select input - enables device and latches address when pulled low with RD. |
| 13 | RD | Read input - initiates conversion and controls data access timing in both interface modes. |
| 14–21 | DB0–DB7 | Three-state data outputs - latched 8-bit parallel output bus compatible with 8080/8051-style microprocessors. |
| 22 | VDD | Power supply - +5 V supply pin; requires 47 µF electrolytic + 0.1 µF ceramic bypassing to GND. |
| 23, 24 | NC | No-connect pins - left unconnected; not internally bonded in MX7824LCWG+ die configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in track/hold | Eliminates need for external S/H circuitry - reduces BOM count and layout area in compact DAQ designs. |
| Single +5V supply operation | Removes requirement for dual-rail or precision analog supplies - simplifies power architecture and lowers system cost. |
| 2.5 µs conversion time | Supports real-time servo loop closure at >100 kHz per channel - meets timing budgets in high-speed motion control. |
| 1/2 LSB error specification | Guarantees monotonic transfer function and no missing codes - critical for closed-loop feedback accuracy. |
| Microprocessor-compatible interface | Appears as memory-mapped or I/O-mapped peripheral without glue logic - accelerates firmware integration. |
Applications
| High-Speed Data Acquisition | Digital Signal Processing |
|---|---|
|
Use Scenario: Simultaneous sampling of multiple sensor outputs (e.g., vibration, temperature, pressure) in test equipment or condition-monitoring systems. IC Role / Device Role / Timing Role: Front-end ADC performing multiplexed 4-channel digitization with deterministic 2.5 µs latency per sample. Use Value: Enables synchronized multi-sensor capture at 100 kHz/channel without external timing coordination or sample-and-hold components. |
Use Scenario: Real-time spectral analysis of audio or telecom signals using FFT-based algorithms on embedded DSPs. IC Role / Device Role / Timing Role: High-throughput analog interface feeding time-domain samples into DSP memory via parallel bus. Use Value: Delivers 400 kSPS aggregate throughput with sub-µs timing jitter - preserves signal integrity for Nyquist-compliant 10 kHz bandwidth. |
| Telecommunications | High-Speed Servo Control |
|
Use Scenario: Channel monitoring in base station RF front-ends or line-card diagnostics in DSLAMs and optical transceivers. IC Role / Device Role / Timing Role: Precision measurement ADC capturing bias voltages, detector outputs, or PA current sense signals. Use Value: ±1/2 LSB accuracy ensures reliable fault detection thresholds and calibration stability over 0°C to +70°C operating range. |
Use Scenario: Position and current feedback sampling in brushless DC motor drives or CNC axis controllers. IC Role / Device Role / Timing Role: Deterministic latency ADC interfacing directly to microcontroller GPIO or DMA-capable peripherals. Use Value: Mode 0 READY handshake synchronizes conversion completion with CPU WAIT state - eliminates polling overhead and jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, 4-channel, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7824BNZ | Pin-compatible 4-channel 8-bit ADC from Analog Devices; identical 2.5 µs conversion time but ±1 LSB total unadjusted error. | Requires external track/hold for signals >100 Ω source impedance; lacks integrated reference buffer. | Select AD7824BNZ when legacy AD7824 footprint compatibility is mandatory and ±1 LSB error is acceptable. |
| MAX154ACNG+ | Same manufacturer, same 4-channel 8-bit architecture; includes internal 2.5 V reference and ±1/2 LSB error - but in 24-pin PDIP package. | Eliminates need for external reference voltage; however, larger DIP footprint limits high-density PCB use. | Choose MAX154ACNG+ when internal reference simplification outweighs SO-package space constraints. |
Compared with MX7824LCWG+, AD7824BNZ trades guaranteed monotonicity for direct drop-in replacement in legacy AD7824 sockets, while MAX154ACNG+ adds reference integration at the cost of package size - enabling trade-offs between accuracy, board area, and reference design complexity.
Availability
MX7824LCWG+ is available at Aetrix Electronics and suitable for high-speed data acquisition, telecommunications monitoring, and real-time servo control applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MX7824LCWG+ 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 MX7824LCWG+ belongs to Maxim's legacy high-speed data acquisition product line, designed specifically for compact, low-power, microprocessor-coupled ADC applications where speed, accuracy, and integration reduce system-level design effort.
FAQ
What is the maximum sampling rate achievable with the MX7824LCWG+?
The MX7824LCWG+ achieves a maximum aggregate sampling rate of 400 kHz, calculated from its 2.5 µs conversion time plus minimum 500 ns delay between conversions. This translates to 100 kHz per channel when all four analog inputs are used sequentially - sufficient for Nyquist-compliant sampling of up to 10 kHz bandwidth signals without aliasing.
Does the MX7824LCWG+ include an internal voltage reference?
No, the MX7824LCWG+ does not include an internal voltage reference. Unlike the MAX154/MAX158 family, it requires external VREF+ and VREF− connections to define the full-scale and zero-scale input voltages. The reference inputs accept 0 V to +5 V, allowing flexible configurations such as power-supply referencing or precision external references.
Can the MX7824LCWG+ operate with a 3.3 V microprocessor interface?
Yes, the MX7824LCWG+ supports 3.3 V microprocessor interfaces through its three-state DB0–DB7 outputs and CMOS-compatible control inputs (CS, RD). Logic high input threshold is 2.4 V, and output high voltage exceeds 4.0 V at 1.6 mA load - ensuring robust level compatibility when interfaced with 3.3 V systems using appropriate pull-up resistors or bus buffers.
What is the purpose of the NC pins on the MX7824LCWG+?
Pins 23 and 24 on the MX7824LCWG+ are designated NC (No Connect) and must remain unconnected. These pins correspond to A2 and TP (test point) functions present on the 8-channel MX7828 variant but are not bonded to the MX7824 die. Connecting them risks unintended behavior or damage due to floating internal nodes.
How does the MX7824LCWG+ handle bipolar input signals?
The MX7824LCWG+ accepts only unipolar 0 V to +5 V analog inputs. To process bipolar signals (e.g., ±4 V), an external signal conditioning circuit - such as a level-shifting amplifier - must translate the input into the supported range. Figure 10a in the original datasheet shows a verified implementation using an op-amp and external reference to achieve complementary offset binary coding.
MX7824LCWG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- 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:
- 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:
- -
MX7824LCWG+ FAQ
1.How can I place an order for MX7824LCWG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MX7824LCWG+ 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 MX7824LCWG+ reliable?
The price and inventory of MX7824LCWG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX7824LCWG+ is usually 5 days.
3.What payment methods are accepted for MX7824LCWG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX7824LCWG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX7824LCWG+?
MX7824LCWG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX7824LCWG+ 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 MX7824LCWG+?
For technical support, including MX7824LCWG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX7824LCWG+ requirements.
6.How does Aetrix verify that MX7824LCWG+ is sourced from the original manufacturer or authorized distributors?
All MX7824LCWG+ 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 MX7824LCWG+ meets industry standards.
7.What is the process for return or replacement of MX7824LCWG+?
All MX7824LCWG+ units undergo pre-shipment inspection (PSI). If there is an issue with MX7824LCWG+, 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 MX7824LCWG+ part is unused and in its original packaging.
Return procedure for MX7824LCWG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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