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Analog Devices Inc./Maxim Integrated MX7828LN+
- Part No.:
- MX7828LN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MX7828LN+.pdf
- Description:
- IC ADC 8BIT HS 28-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,103
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Product details
Overview
MX7828LN+ from Maxim Integrated is an 8-bit, 8-channel high-speed 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 functions as a multiplexed data acquisition front-end in real-time signal capture systems requiring fast sampling without external sample-and-hold circuitry.
For engineers reviewing the MX7828LN+ datasheet, MX7828LN+ pinout, MX7828LN+ application, or MX7828LN+ equivalent, key selection considerations include its 8-channel CMOS multiplexer architecture, open-drain RDY/INT timing interface for microprocessor WAIT-state integration, ±1/2 LSB total unadjusted error, and compatibility with AD7828-based legacy designs.
Technical Context
The MX7828LN+ employs a half-flash conversion architecture with two 4-bit flash ADC sections and an internal DAC to generate the lower 4 bits from the residue voltage. Its analog input stage uses 31 comparators and exhibits 45 pF input capacitance with 0.7 V/µs slew rate in tracking mode.
Digital interface operates in Mode 0 (WAIT-state compatible) or Mode 1 (non-WAIT), controlled solely by CS and RD signals. RDY is an open-drain status output tied to processor READY/WAIT; INT asserts low upon conversion completion and resets on rising edge of CS or RD.
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 (tCRD + tP) |
| Total Unadjusted Error | ±1/2 LSB - ensures monotonicity and no missing codes over temperature |
| Analog Input Range | 0V to +5V - compatible with standard TTL/CMOS logic-level sensor outputs |
| Supply Voltage | +5V ±5% - eliminates need for dual or precision supplies in embedded systems |
| Input Capacitance | 45 pF - requires source impedance ≤100Ω for full 1 µs acquisition settling |
| Track/Hold | Built-in - removes external THS requirement for most DC–10 kHz signals |
Pinout & Package
MX7828LN+ is housed in a 28-pin plastic DIP package (0.600" width), pin-compatible with AD7828 and suitable for through-hole prototyping and industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | AIN1–AIN8 | Eight single-ended analog input channels selected via A0–A2 address lines |
| 9 | RD | Active-low read control: initiates conversion and enables data bus access |
| 10 | CS | Active-low chip select: enables device and latches channel address |
| 11 | INT | Open-drain interrupt output: goes low at conversion completion |
| 12 | RDY | Open-drain ready output: low during conversion, high-Z when data valid |
| 13, 14 | VREF−, VREF+ | Reference span inputs: define zero-code (VREF−) and full-scale (VREF+) voltages |
| 15 | GND | Analog ground reference - must be star-connected to minimize noise coupling |
| 16 | VDD | +5V power supply - requires 47 µF electrolytic + 0.1 µF ceramic bypassing |
| 17–24 | DB0–DB7 | Three-state parallel data outputs (LSB to MSB) - directly interface to 8-bit microprocessor buses |
| 25, 26, 27 | A0, A1, A2 | Channel address inputs - select one of eight analog inputs (A2 only active on MX7828) |
| 28 | TP (REF OUT) | Test point only - not connected internally; do not use as reference source |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track/hold | Eliminates external THS IC and associated layout complexity for ≤10 kHz inputs |
| Memory-mapped or I/O-port interface | Requires no glue logic - appears as memory location or peripheral port to 8086/Z80 families |
| 2.5 µs conversion + 500 ns inter-conversion delay | Supports 400 kHz aggregate throughput - sufficient for real-time telecom and servo loop sampling |
| ±1/2 LSB total unadjusted error | Guarantees monotonic transfer function and no missing codes across 0°C to +70°C range |
| Single +5V supply with no external clock | Reduces BOM count and power domain complexity in cost-sensitive embedded systems |
Applications
| Telecom Channel Monitoring | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Real-time monitoring of 8 voice-band channels in PCM-based telephony equipment. IC Role / Device Role / Timing Role: 8-channel multiplexed ADC capturing simultaneous analog line signals at 8 kHz per channel. Use Value: 2.5 µs conversion enables full 8-channel scan within 20 µs - well below 125 µs frame time required for E1/T1 compliance. |
Use Scenario: Acquisition of sensor data streams for FFT-based spectral analysis in portable test instruments. IC Role / Device Role / Timing Role: High-speed data acquisition engine feeding DMA buffers in DSP subsystems. Use Value: Built-in track/hold and 45 pF input capacitance allow direct connection to anti-alias filters without gain-stage buffering. |
| Industrial Servo Control Feedback | Audio Instrumentation Sampling |
Use Scenario: Closed-loop position/velocity feedback sampling from 8 motor encoder analog outputs in CNC motion controllers. IC Role / Device Role / Timing Role: Synchronized multi-channel ADC providing time-aligned samples for vector control algorithms. Use Value: Mode 0 interface with RDY output enables deterministic latency (<2.5 µs + setup) critical for sub-100 µs control loop cycles. |
Use Scenario: Multi-channel audio waveform capture in digital oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Parallel-output ADC digitizing conditioned microphone or line-level signals. Use Value: ±1/2 LSB error and 0V–5V input range support 12-bit effective resolution when oversampled and filtered digitally. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, 8-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7828BNZ | Same pinout, identical 2.5 µs conversion, but ±1 LSB error spec and no internal reference option | Valid drop-in replacement where ±1 LSB accuracy suffices and external reference is used | Select AD7828BNZ when sourcing from Analog Devices' long-term product roadmap is preferred |
| MAX158ACNG+ | Same die family, includes internal 2.5V reference and 2.5V REF OUT pin; otherwise identical timing and interface | Preferred where board space or BOM count reduction is critical and reference stability <100 ppm/°C is acceptable | Choose MAX158ACNG+ if eliminating external reference IC and trimming components is a system-level priority |
Compared with MX7828LN+, AD7828BNZ offers identical mechanical and timing compatibility but relaxed accuracy, while MAX158ACNG+ adds integrated reference functionality at the cost of higher quiescent current - both require validation of reference configuration and thermal drift in final layout.
Availability
MX7828LN+ is available at Aetrix Electronics and suitable for industrial servo control, telecom channel monitoring, and audio instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MX7828LN+ 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) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MX7824/MX7828 family was engineered for high-speed, multi-channel data acquisition in resource-constrained embedded systems - prioritizing low-power single-supply operation, minimal external components, and microprocessor-friendly timing interfaces.
FAQ
What is the operating temperature range for MX7828LN+?
The MX7828LN+ is specified for 0°C to +70°C operation. This commercial-grade temperature range is validated across all electrical parameters including ±1/2 LSB total unadjusted error, 2.5 µs conversion time, and 45 pF input capacitance. The 'LN' suffix explicitly denotes this temperature grade, distinguishing it from 'BQ' (–40°C to +85°C) and 'TQ' (–55°C to +125°C) variants of the same MX7828 family.
Does MX7828LN+ include an internal voltage reference?
No, MX7828LN+ does not include an internal voltage reference. Unlike the MAX158, which integrates a 2.5V reference with REF OUT pin, the MX7828LN+ requires external reference inputs at VREF+ and VREF− pins to define its full-scale and zero-code points. The TP (REF OUT) pin on MX7828LN+ is a test point only and must not be connected or loaded.
Can MX7828LN+ interface directly with an 8086 microprocessor bus?
Yes, MX7828LN+ supports direct connection to an 8086 microprocessor bus using Mode 0 interface. Its three-state DB0–DB7 outputs, open-drain RDY output (for READY input), and CS/RD control scheme allow memory-mapped or I/O-port access without external address decoding logic. Timing parameters like tACC1 = 2.0 µs and tRDY = 40 ns are compliant with 8086 minimum bus cycle requirements.
What is the maximum recommended source impedance for analog inputs on MX7828LN+?
The maximum recommended source impedance for MX7828LN+ analog inputs is 100Ω. This limit ensures full 1 µs acquisition settling time given the device's 45 pF input capacitance and internal switch resistance. Exceeding 100Ω introduces settling errors that degrade the guaranteed ±1/2 LSB total unadjusted error specification, particularly at higher sampling rates or temperature extremes.
Is MX7828LN+ pin-compatible with AD7828?
Yes, MX7828LN+ is fully pin-compatible with Analog Devices' AD7828. Both devices share identical 28-pin DIP pinout, function mapping (including A0–A2, RD, CS, INT, RDY, VREF±, DB0–DB7), and electrical timing specifications such as 2.5 µs conversion time and Mode 0/Mode 1 interface behavior. This allows direct substitution in existing AD7828-based designs without PCB modification.
MX7828LN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 8
- 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:
- 28-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MX7828LN+ FAQ
1.How can I place an order for MX7828LN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MX7828LN+ 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 MX7828LN+ reliable?
The price and inventory of MX7828LN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX7828LN+ is usually 5 days.
3.What payment methods are accepted for MX7828LN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX7828LN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX7828LN+?
MX7828LN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX7828LN+ 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 MX7828LN+?
For technical support, including MX7828LN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX7828LN+ requirements.
6.How does Aetrix verify that MX7828LN+ is sourced from the original manufacturer or authorized distributors?
All MX7828LN+ 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 MX7828LN+ meets industry standards.
7.What is the process for return or replacement of MX7828LN+?
All MX7828LN+ units undergo pre-shipment inspection (PSI). If there is an issue with MX7828LN+, 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 MX7828LN+ part is unused and in its original packaging.
Return procedure for MX7828LN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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