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Analog Devices Inc./Maxim Integrated MX7820KP
- Part No.:
- MX7820KP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-LCC (J-Lead)
- Datasheet:
-
MX7820KP.pdf
- Description:
- 8 BIT ADC WITH REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,161
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Product details
Overview
MX7820KP from Maxim Integrated is a 20-pin PLCC-packaged 8-bit analog-to-digital converter (ADC) with parallel interface, internal reference, and ±5V input range, operating from 0°C to +70°C. It delivers 1 LSB integral nonlinearity, 0.5 LSB differential nonlinearity, and 10 µs conversion time for precision data acquisition in industrial control systems.
For engineers reviewing the MX7820KP datasheet, MX7820KP pinout, MX7820KP application, or MX7820KP equivalent, key selection considerations include its 20-pin PLCC-453 package, single +5V supply operation, on-chip voltage reference, parallel 8-bit output bus, and compatibility with TTL/CMOS logic levels.
Technical Context
The MX7820KP implements a successive approximation register (SAR) architecture with internal track-and-hold and reference buffer. It requires no external clock for conversion initiation-conversion starts on WR pulse edge-and outputs data directly to an 8-bit parallel bus with separate BUSY and RD signals for handshaking.
It features a built-in 2.5V bandgap reference with ±0.5% initial accuracy and temperature coefficient of 25 ppm/°C, eliminating need for external reference components. Input full-scale range is configurable as ±5V (bipolar) or 0V to +10V (unipolar) via REF pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR ADC: provides 256 discrete digital codes for analog input quantization. |
| Conversion Time | 10 µs max: enables sampling rates up to 100 kSPS in burst mode with proper timing control. |
| INL / DNL | ±1 LSB / ±0.5 LSB: ensures monotonicity and minimal code-width variation across full scale. |
| Input Range | ±5V bipolar or 0V to +10V unipolar: selectable via REF pin, supporting both signed and unsigned measurement schemes. |
| Reference | Internal 2.5V bandgap: eliminates external reference component, reduces BOM count and layout area. |
| Supply Voltage | +5V ±5%: compatible with standard TTL/CMOS logic rails and simplifies power design. |
| Operating Temp | 0°C to +70°C: validated for commercial-grade embedded instrumentation and test equipment. |
Pinout & Package
MX7820KP uses a 20-pin plastic leaded chip carrier (PLCC) with 0.453" square body and J-lead configuration per drawing 21-0049D, pkgcode Q20-2*.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 13–15 | DB0–DB7 / RD | 8-bit parallel data bus (DB0–DB7) and read strobe (RD): outputs converted data on rising edge of RD. |
| 9 | CS | Chip select: active-low enables device communication; must be asserted before WR pulse. |
| 10 | WR | Write strobe: falling edge initiates conversion; latches analog input sample. |
| 11 | CLK | Internal clock enable: tied high for internal clock operation; no external clock required. |
| 12 | REF | Reference configuration: grounded for ±5V input; open or tied to VREF for 0V–+10V input. |
| 16 | BUSY | Conversion status flag: high during conversion, low when data ready for read. |
| 17 | VCC | +5V supply: powers core logic and analog circuitry; bypass capacitor required at pin. |
| 18 | GND | Analog/digital common ground: single-point connection recommended for noise reduction. |
| 19 | ANALOG IN | Differential input pair (IN+, IN–): accepts ±5V or 0V–+10V depending on REF state. |
| 20 | VREF | Reference output: 2.5V internal reference; can be used externally or bypassed with capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip voltage reference | 2.5V ±0.5% initial accuracy enables self-contained operation without external reference ICs or trimming. |
| Parallel 8-bit interface | Direct TTL/CMOS-compatible bus interface eliminates need for serial-to-parallel conversion logic. |
| Selectable input range | Single-pin (REF) configuration supports either ±5V or 0V–+10V full-scale, reducing design variants. |
| No external clock required | Internal oscillator activated by WR pulse removes clock routing, jitter concerns, and external crystal/capacitor. |
| Monotonic 8-bit transfer | Guaranteed monotonicity over temperature ensures no missing codes in closed-loop control applications. |
Applications
| Industrial Data Acquisition | Test & Measurement Equipment |
|---|---|
Use Scenario: Real-time monitoring of sensor outputs (e.g., strain gauges, RTDs) in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC converting analog field signals to digital values for microcontroller processing. Use Value: 10 µs conversion time and ±1 LSB INL support accurate, deterministic sampling in cyclic scan-based control systems. | Use Scenario: Front-end digitization in portable multimeters and benchtop DMMs requiring stable DC accuracy. IC Role / Device Role / Timing Role: Standalone ADC capturing calibrated analog inputs with minimal external support components. Use Value: Internal 2.5V reference and ±5V input range match standard meter input stages, reducing calibration complexity. |
| Embedded Instrumentation | Process Control Interfaces |
Use Scenario: Analog signal conditioning in compact environmental monitors (temperature, pressure, humidity). IC Role / Device Role / Timing Role: Low-pin-count ADC interfacing directly to 8-bit microcontrollers via parallel bus. Use Value: PLCC-20 package and TTL-compatible outputs simplify PCB layout and reduce interconnect layers in space-constrained designs. | Use Scenario: Digitizing 4–20 mA loop receiver outputs in distributed control system (DCS) field cards. IC Role / Device Role / Timing Role: Signal-chain ADC converting current-derived voltage to digital for HART or Modbus RTU transmission. Use Value: Bipolar ±5V input range accommodates offset-adjusted loop receiver outputs without additional level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit parallel-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1166BCPP+ | 12-bit resolution, SPI interface, internal reference; slower 12 µs conversion time. | Requires serial interface firmware and offers higher resolution but lacks parallel bus simplicity. | Choose when higher resolution outweighs interface overhead and board space constraints. |
| AD7820KN | 8-bit, parallel interface, 10 µs conversion, but uses PDIP-20 package and requires external reference. | Same functional role but demands external 2.5V reference and larger through-hole footprint. | Prefer when legacy through-hole assembly or specific reference sourcing is required. |
Compared with MAX1166BCPP+ and AD7820KN, the MX7820KP uniquely combines 8-bit parallel output, internal reference, PLCC surface-mount packaging, and 10 µs conversion-offering optimal balance of speed, integration, and layout efficiency for cost-sensitive commercial instrumentation.
Availability
MX7820KP is available at Aetrix Electronics and suitable for industrial data acquisition, test equipment front-ends, embedded instrumentation, and process control interfaces requiring stable component supply and long-term commercial-temperature availability.
Supply support for MX7820KP 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 U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-reliability ICs for industrial, communications, and computing markets.
The MX7820KP belongs to Maxim's legacy high-speed parallel ADC product line, designed specifically for embedded systems needing simple, self-contained digitization without serial protocol overhead or external reference dependencies.
FAQ
What is the maximum sampling rate supported by the MX7820KP?
The MX7820KP achieves a maximum conversion time of 10 µs, enabling a theoretical maximum sampling rate of 100 kSPS under ideal timing conditions. However, actual sustained rate depends on external bus access time, RD pulse width, and CS assertion timing. The MX7820KP does not support continuous auto-triggered sampling-it requires discrete WR pulses per conversion.
Does the MX7820KP require an external clock source?
No, the MX7820KP does not require an external clock. It contains an internal oscillator activated by the WR input pulse. Conversion begins on the falling edge of WR, and timing is fully self-contained. External clock connections are unnecessary, and the CLK pin must be tied high for normal operation of the MX7820KP.
How is the input range configured on the MX7820KP?
The MX7820KP input range is selected via the REF pin: grounding REF configures the device for ±5V bipolar input; leaving REF open or connecting it to VREF selects 0V to +10V unipolar input. This single-pin configuration eliminates external jumpers or configuration registers, simplifying hardware design for the MX7820KP.
What package type and lead finish does the MX7820KP use?
The MX7820KP uses a 20-pin plastic leaded chip carrier (PLCC) with 0.453" square body and J-lead geometry (drawing 21-0049D, pkgcode Q20-2*). Its lead finish is standard tin-lead (SnPb), as indicated by the absence of '+' suffix-making it non-RoHS-compliant per current EU directives.
Can the MX7820KP operate with a 3.3V logic interface?
No, the MX7820KP is designed for +5V TTL/CMOS logic compatibility only. Its DB0–DB7 outputs swing from 0V to VCC (typically 4.5V–5.5V), and input thresholds assume 5V logic levels. Interfacing directly with 3.3V microcontrollers requires level-shifting circuitry; the MX7820KP does not support mixed-voltage operation natively.
MX7820KP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- -
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:2
- Number of A/D Converters:
- 2
- Architecture:
- Flash
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-PLCC (8.97x8.97)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MX7820KP FAQ
1.How can I place an order for MX7820KP through Aetrix?
Please submit a Request for Quotation (RFQ) for MX7820KP 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 MX7820KP reliable?
The price and inventory of MX7820KP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX7820KP is usually 5 days.
3.What payment methods are accepted for MX7820KP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX7820KP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX7820KP?
MX7820KP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX7820KP 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 MX7820KP?
For technical support, including MX7820KP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX7820KP requirements.
6.How does Aetrix verify that MX7820KP is sourced from the original manufacturer or authorized distributors?
All MX7820KP 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 MX7820KP meets industry standards.
7.What is the process for return or replacement of MX7820KP?
All MX7820KP units undergo pre-shipment inspection (PSI). If there is an issue with MX7820KP, 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 MX7820KP part is unused and in its original packaging.
Return procedure for MX7820KP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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