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Analog Devices Inc./Maxim Integrated MX7824KCWG+T
- Part No.:
- MX7824KCWG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MX7824KCWG+T.pdf
- Description:
- IC ADC 8BIT FLASH 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,751
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Product details
Overview
MX7824KCWG+T 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 0V to +5V analog input range, latched three-state data outputs for direct microprocessor bus interfacing, and pin compatibility with AD7824. It is used in high-speed data acquisition systems requiring deterministic timing and minimal external support circuitry.
For engineers reviewing the MX7824KCWG+T datasheet, MX7824KCWG+T pinout, MX7824KCWG+T application, or MX7824KCWG+T equivalent, key selection considerations include its 2.5 µs per-channel conversion time, ±1/2 LSB total unadjusted error, 24-pin wide SOIC package, and Mode 0/Mode 1 digital interface flexibility for WAIT-state or non-WAIT microprocessors.
Technical Context
The MX7824KCWG+T employs a half-flash architecture with two 4-bit flash ADC sections and an internal DAC to generate the lower 4 bits from the residue voltage. It uses a 15-comparator front-end for the MSBs and another 15 for the LSBs, achieving full 8-bit resolution without external calibration.
Digital control relies solely on /CS and /RD inputs, supporting two modes: Mode 0 (WAIT-state compatible, INT- and RDY-driven handshaking) and Mode 1 (non-WAIT, overlapping conversion and read). The device operates with no external clock and includes open-drain RDY and active-low INT outputs for system synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for precise quantization of analog signals. |
| Conversion Time | 2.5 µs - enables up to 400 kHz maximum sampling rate (tCRD + tP = 2.5 µs), suitable for real-time signal capture. |
| Total Unadjusted Error | ±1/2 LSB - guarantees monotonicity and no missing codes across full temperature range (0°C to +70°C). |
| Analog Input Range | 0V to +5V - matches standard TTL/CMOS logic levels and simplifies sensor interface design. |
| Supply Voltage | +5V only - eliminates need for dual supplies or voltage regulators in embedded systems. |
| Reference Configuration | VREF+ and VREF− pins - allows flexible full-scale definition (e.g., 0V–5V, ±4V with external op-amp), unlike internal-reference variants. |
| Digital Interface | /CS and /RD only - reduces control-line count and eliminates address decoding logic in microprocessor systems. |
Pinout & Package
MX7824KCWG+T is housed in a 24-pin Wide SOIC (SO) package with 300 mil body width and standard 0.050" lead pitch. Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | AIN1–AIN4 | Analog input channels - multiplexed 4-channel inputs accepting 0V to +5V signals; internally sampled via track/hold. |
| 5, 6, 7, 8 | DB0–DB3 | Three-state data outputs (LSB nibble) - directly drive microprocessor data bus; high-impedance when /CS high. |
| 9, 10, 11, 12 | DB4–DB7 | Three-state data outputs (MSB nibble) - complete 8-bit parallel output; VOL ≤ 0.4V @ 1.6mA, VOH ≥ 4.0V @ –360µA. |
| 13 | VREF− | Reference lower bound - sets zero-code voltage; must be connected between GND and VREF+ (0V to +5V range). |
| 14 | VREF+ | Reference upper bound - defines full-scale input voltage; tied to +5V for 0V–5V range or adjusted for bipolar operation. |
| 15 | GND | Analog/digital ground - single ground pin shared for all circuits; requires low-inductance 0.1µF + 47µF bypassing at VDD. |
| 16 | INT | Active-low interrupt - goes low at conversion completion; synchronized to /CS or /RD rising edge for clean handshaking. |
| 17 | RDY | Open-drain ready - pulled low on /CS fall, high-impedance at conversion end; connects directly to CPU WAIT input. |
| 18 | /RD | Read strobe - falling edge initiates conversion in Mode 0; controls data latch timing and interface mode selection. |
| 19 | /CS | Chip select - must be low to enable conversion, data output, and INT/RDY assertion; disables all outputs when high. |
| 20 | A0, A1 | Multiplexer address inputs - select one of four analog channels (00=AIN1, 01=AIN2, 10=AIN3, 11=AIN4). |
| 21, 22 | NC | No connect - unused pins; must remain unconnected per datasheet to avoid parametric shift. |
| 23, 24 | VDD, TP (REF OUT) | +5V supply and test point - TP is not connected internally; VDD requires local 0.1µF ceramic + 47µF electrolytic bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in track/hold | Eliminates external sample-and-hold ICs and associated layout complexity for most DC–10kHz signals. |
| Pin-compatible with AD7824 | Enables drop-in replacement in legacy designs using Analog Devices' 4-channel 8-bit ADCs without PCB revision. |
| Two-mode digital interface | Supports both WAIT-state microprocessors (Mode 0) and non-WAIT architectures (Mode 1), increasing system integration flexibility. |
| Single-supply +5V operation | Reduces power supply design overhead and avoids level-shifting components in 5V-centric industrial control systems. |
| ±1/2 LSB accuracy over 0°C to +70°C | Ensures consistent measurement fidelity across commercial temperature range without recalibration or trimming. |
Applications
| High-Speed Data Acquisition | Digital Signal Processing |
|---|---|
Use Scenario: Real-time monitoring of motor phase currents in servo drives using four synchronized current-sense amplifiers. IC Role / Device Role / Timing Role: MX7824KCWG+T acts as the primary 4-channel digitizer, capturing analog feedback at up to 100 kHz per channel with deterministic 2.5 µs latency. Use Value: Enables closed-loop control loop execution within 10 µs, meeting IEC 61800-3 response requirements for precision motion systems. | Use Scenario: Multi-channel spectral analysis of audio bandpass-filtered speech signals in telecom voice codecs. IC Role / Device Role / Timing Role: MX7824KCWG+T digitizes eight filtered bands (time-multiplexed across four inputs) for FFT-based feature extraction. Use Value: Delivers 8-bit resolution at 400 kHz aggregate sampling, satisfying ITU-T G.711 μ-law encoding SNR targets without oversampling. |
| Telecommunications | High-Speed Servo Control |
Use Scenario: Channelized analog line card in access multiplexers digitizing four POTS lines simultaneously. IC Role / Device Role / Timing Role: MX7824KCWG+T serves as the front-end ADC for SLIC interface conditioning, operating in Mode 1 for continuous pipeline throughput. Use Value: Achieves 4×100 kHz per-channel sampling with <1 LSB integral nonlinearity, meeting GR-909 harmonic distortion limits. | Use Scenario: Position feedback acquisition in CNC machine tool axis controllers using resolver-to-analog converters. IC Role / Device Role / Timing Role: MX7824KCWG+T samples four analog resolver outputs (X/Y sin/cos) with synchronized track/hold to suppress crosstalk. Use Value: Maintains ±1/2 LSB error across 0–70°C, ensuring sub-arcminute angular resolution stability in factory-floor environments. |
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 |
|---|---|---|---|
| AD7824KNZ | Same 4-channel, 8-bit, 2.5 µs architecture; requires external reference; ±1 LSB error spec (vs. MX7824KCWG+T's ±1/2 LSB). | Valid for legacy AD7824 footprint designs but lacks guaranteed monotonicity over full temperature range. | Select AD7824KNZ only if board layout is fixed to AD7824 and ±1 LSB accuracy suffices. |
| MAX154ACNG+ | Pin-compatible 4-channel variant with integrated 2.5V reference; consumes 15 mA (vs. MX7824KCWG+T's 75 mW typical); same 2.5 µs speed. | Suitable where reference stability is critical and board space allows for internal reference bypass capacitor (0.01 µF). | Choose MAX154ACNG+ when eliminating external reference components justifies higher supply current and added decoupling. |
Compared with AD7824KNZ, MX7824KCWG+T offers tighter ±1/2 LSB error and identical pinout; compared with MAX154ACNG+, it trades internal reference convenience for lower power and external reference flexibility-making it optimal for cost-sensitive, reference-flexible, or thermally constrained designs.
Availability
MX7824KCWG+T is available at Aetrix Electronics and suitable for high-speed data acquisition, telecommunications line cards, digital signal processing subsystems, and servo control systems requiring stable component supply across commercial temperature grades.
Supply support for MX7824KCWG+T 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MX7824 series belongs to Maxim's high-speed data acquisition product line, designed specifically for applications demanding sub-3 µs conversion latency, minimal external components, and robust digital interfacing in 5V systems.
FAQ
What is the maximum sampling rate achievable with the MX7824KCWG+T?
The MX7824KCWG+T achieves a maximum aggregate sampling rate of 400 kHz, calculated from its 2.5 µs conversion time plus minimum 500 ns delay between conversions (tP). This supports up to 100 kHz per channel when time-multiplexing across its four analog inputs, satisfying Nyquist criteria for 10 kHz bandwidth signals without external anti-alias filtering.
Does the MX7824KCWG+T require an external clock source?
No, the MX7824KCWG+T operates without an external clock. Its internal timing circuitry is triggered solely by the /CS and /RD control signals. Conversion initiation and data readiness are fully asynchronous to system clocks, simplifying timing design in microprocessor-based systems.
How does the MX7824KCWG+T handle bipolar input signals?
The MX7824KCWG+T accepts only unipolar 0V to +5V inputs by default, but supports bipolar operation (e.g., ±4V) using external op-amp scaling circuitry and appropriate VREF+ and VREF− connections. The device itself does not generate offset binary coding; external logic or firmware must interpret the 00000000–11111111 output as complementary offset binary for bipolar ranges.
Can the MX7824KCWG+T be used with a 3.3V microprocessor data bus?
Yes, the MX7824KCWG+T's three-state outputs are compatible with 3.3V logic when properly terminated: DB0–DB7 drive VOH ≥ 4.0V (min) at –360 µA and VOL ≤ 0.4V (max) at 1.6 mA, meeting 3.3V system noise margin requirements. A series resistor (e.g., 100 Ω) per line is recommended to prevent overshoot on fast edges.
What is the function of the TP (REF OUT) pin on the MX7824KCWG+T?
The TP (REF OUT) pin on the MX7824KCWG+T is a test point with no internal connection. It must remain unconnected in all applications. Unlike the MAX154/MAX158, the MX7824KCWG+T does not provide an internal reference voltage; users must supply external VREF+ and VREF− to define the ADC's full-scale range.
MX7824KCWG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MX7824KCWG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MX7824KCWG+T 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+T reliable?
The price and inventory of MX7824KCWG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX7824KCWG+T is usually 5 days.
3.What payment methods are accepted for MX7824KCWG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX7824KCWG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX7824KCWG+T?
MX7824KCWG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX7824KCWG+T 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+T?
For technical support, including MX7824KCWG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX7824KCWG+T requirements.
6.How does Aetrix verify that MX7824KCWG+T is sourced from the original manufacturer or authorized distributors?
All MX7824KCWG+T 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+T meets industry standards.
7.What is the process for return or replacement of MX7824KCWG+T?
All MX7824KCWG+T units undergo pre-shipment inspection (PSI). If there is an issue with MX7824KCWG+T, 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+T part is unused and in its original packaging.
Return procedure for MX7824KCWG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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