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Texas Instruments COP432CN
- Part No.:
- COP432CN
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
COP432CN.pdf
- Description:
- IC ADC 8BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,098
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Product details
Overview
COP432CN from Texas Instruments is an 8-bit serial-output successive-approximation analog-to-digital converter with a 2-channel software-configurable multiplexer, single-supply operation at 5 VDC, ±1 LSB total unadjusted error, and 32 μs conversion time. It interfaces directly with COPS-family microcontrollers via TI MICROWIRE-compatible serial I/O and supports both single-ended and differential input modes for sensor signal digitization in embedded data acquisition systems.
For engineers reviewing the COP432CN datasheet, COP432CN pinout, COP432CN application, or COP432CN equivalent, this device is selected for cost-sensitive, low-power industrial monitoring where ratiometric accuracy, minimal external components, and direct microcontroller integration are required - not for high-speed, multi-channel, or precision metrology applications.
Technical Context
The COP432CN implements a successive-approximation register (SAR) architecture with an internal resistor ladder and sample-data comparator. Its analog front-end supports configurable channel selection via 2-bit MUX addressing shifted in on the DI line, enabling dynamic reconfiguration between single-ended (CH0 or CH1) and differential (CH0–CH1) modes on each conversion cycle.
Digital interface timing follows TI MICROWIRE protocol: CS must remain low during conversion; DO outputs MSB-first data after one clock delay; no SE (shift-enable) pin is present, so LSB-first output is not supported. The device operates with VREF tied to VCC internally and includes built-in zener regulation for V+ supply compatibility up to 8.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete digital codes over full-scale input range. |
| Total Unadjusted Error | ±1 LSB max - includes offset, full-scale, linearity, and multiplexer errors; no calibration required in production use. |
| Conversion Time | 32 μs - fixed duration at 250 kHz clock; enables up to ~31.25 kSPS sustained throughput. |
| Supply Voltage | 4.5 VDC to 6.3 VDC - compatible with standard 5 V logic rails and tolerant of typical board-level ripple. |
| Input Range | 0 V to 5 V with single 5 V supply - supports ratiometric transducer interfaces without external level-shifting. |
| Power Dissipation | 15 mW typical - enables battery-powered or thermally constrained deployments without heatsinking. |
| Reference Configuration | VREF internally connected to VCC - eliminates external reference component and simplifies BOM for cost-driven designs. |
Pinout & Package
Package: 8-pin plastic DIP (PDIP), 0.3-inch width, through-hole mount. Pinout validated per TI SNAS531B Figure 5 (ADC0832-N PDIP top view) and functional block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply rail | Primary 5 V power input; also serves as internal voltage reference source when VREF is not externally driven. |
| 2 - CH0 | Analog input channel 0 | Configurable as single-ended (+) input or differential (+) input paired with CH1; accepts 0 V to VCC + 0.05 V. |
| 3 - CH1 | Analog input channel 1 | Configurable as single-ended (+) input or differential (−) input paired with CH0; shares same voltage range as CH0. |
| 4 - GND | Ground reference | Analog and digital common return; must be low-impedance to minimize noise coupling into SAR sampling node. |
| 5 - DI | Serial data input | Accepts MUX address bits and start bit (logic "1") under CS control; ignored after conversion starts. |
| 6 - DO | Serial data output | Tri-state output delivering MSB-first 8-bit result; active only when CS = low and conversion in progress. |
| 7 - CLK | Serial clock input | Asynchronous edge-triggered clock (max 400 kHz); rising edge clocks DI, falling edge clocks DO data. |
| 8 - CS | Chip select | Active-low enable; must go high between conversions to reset internal registers and release DO into high-Z state. |
Key Features
| Feature | Design Value |
|---|---|
| TI MICROWIRE-compatible serial interface | Direct native connection to COPS-family processors without glue logic or protocol translation. |
| Software-configurable 2-channel multiplexer | Single conversion cycle can switch between CH0 single-ended, CH1 single-ended, or CH0–CH1 differential mode. |
| Ratiometric operation with internal VREF tie | VREF internally connected to VCC - maintains consistent code mapping despite 5 V rail drift within 4.5–6.3 V range. |
| No zero or full-scale adjustment required | Factory-trimmed offset and gain eliminate manual calibration steps in manufacturing and field deployment. |
| Shunt regulator support for V+ supply | Internal 6.3–8.5 V zener allows direct connection to unregulated higher-voltage supplies (e.g., 9 V battery) with current-limiting resistor. |
Applications
| Temperature Monitoring | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Digitizing output from thermistors or RTDs in HVAC control panels where ambient temperature varies from −20°C to +70°C. IC Role / Device Role / Timing Role: COP432CN acts as the primary A/D front-end, converting conditioned analog voltage to 8-bit digital values synchronized to microcontroller SPI-like reads. Use Value: ±1 LSB error ensures ≤0.4% full-scale accuracy across operating temperature; 32 μs conversion enables real-time loop updates every 100 ms with margin. |
Use Scenario: Reading position feedback from potentiometers in motorized valve actuators powered by 5 V rails. IC Role / Device Role / Timing Role: COP432CN performs single-ended CH0 acquisition of wiper voltage referenced to system ground, rejecting common-mode noise from nearby AC solenoids. Use Value: Internal VREF tie to VCC maintains stable code mapping despite ±5% supply variation; 15 mW dissipation prevents thermal drift in sealed enclosures. |
| Embedded Microcontroller Peripherals | Low-Cost Data Loggers |
|
Use Scenario: Adding analog sensing capability to legacy COPS-based controllers lacking integrated ADC resources. IC Role / Device Role / Timing Role: COP432CN serves as a drop-in serial ADC peripheral, interfacing via dedicated GPIO pins configured as CLK, DI, DO, and CS. Use Value: MICROWIRE compatibility eliminates firmware driver development; 8-pin PDIP footprint minimizes PCB redesign effort. |
Use Scenario: Battery-powered environmental monitors recording light, humidity, and voltage levels over 72-hour periods. IC Role / Device Role / Timing Role: COP432CN operates in burst mode-awakened by microcontroller, acquiring one sample per channel, then returning to idle to conserve energy. Use Value: 15 mW active power and automatic high-Z DO release on CS high reduce average current draw below 100 μA between samples. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC0832CCN | Same architecture, 8-pin PDIP, but specified for 0°C to +70°C commercial temp range vs. COP432CN's −40°C to +85°C industrial grade. | Not suitable for extended-temperature industrial environments; identical pinout and interface. | Select COP432CN when operation beyond 70°C is required; ADC0832CCN may offer lower unit cost in volume commercial designs. |
| ADS7822U | 12-bit SAR ADC, SPI interface, 2.7–5.25 V supply, 2.5 μs conversion time - higher resolution and speed but requires external reference and level-shifting for 5 V systems. | Used in precision instrumentation where 8-bit quantization is insufficient; incompatible pinout and firmware interface. | Choose ADS7822U only when ≥12-bit resolution and sub-3 μs latency are mandatory; COP432CN remains optimal for cost- and size-constrained 8-bit needs. |
Compared with ADC0832CCN, COP432CN provides guaranteed performance over −40°C to +85°C without derating, while ADS7822U trades simplicity and cost for resolution and speed - making COP432CN the balanced choice for robust, low-complexity embedded sensing.
Availability
COP432CN is available at Aetrix Electronics and suitable for industrial sensor interfaces, embedded microcontroller peripherals, and low-cost data loggers requiring stable component supply, long-lifecycle availability, and verified second-source alternatives.
Supply support for COP432CN 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of heritage in precision data converters and industrial-grade ICs.
The COP432CN belongs to TI's legacy ADC083x-N family of serial 8-bit ADCs designed specifically for cost-sensitive, microcontroller-coupled data acquisition in industrial controls, instrumentation, and automotive subsystems.
FAQ
What is the operating temperature range for the COP432CN?
The COP432CN is rated for −40°C to +85°C, meeting industrial-grade environmental requirements. This specification is confirmed in the Operating Ratings table of TI SNAS531B, where COP432CN falls under the "ADC0831/2/4/8CCN" designation. Unlike commercial variants such as ADC0832CCN (0°C to +70°C), the COP432CN maintains full electrical performance across its entire industrial temperature span without derating.
Does the COP432CN require an external voltage reference?
No, the COP432CN does not require an external voltage reference. As documented in the TI SNAS531B datasheet, VREF is internally connected to VCC for the COP432CN variant. This enables true ratiometric operation - the digital output code scales directly with VCC - eliminating the need for a precision external reference and reducing BOM count and cost.
Can the COP432CN perform differential measurements?
Yes, the COP432CN supports differential input mode between CH0 and CH1. Per the Functional Description and MUX Addressing Tables in SNAS531B, a 2-bit address sequence configures the internal multiplexer to treat CH0 as the positive input and CH1 as the negative input (or vice versa). This differential capability improves common-mode noise rejection and enables offset-zeroing techniques without external op-amps.
What is the maximum clock frequency supported by the COP432CN?
The COP432CN supports a maximum clock frequency of 400 kHz, as specified in the AC Characteristics table of SNAS531B. At this rate, conversion time remains 32 μs (8 clock cycles), enabling up to ~31.25 kSPS. Operation above 400 kHz is not characterized and may result in increased error or failure to complete conversion sequences reliably.
Is the COP432CN pin-compatible with other ADC083x-N devices?
Yes, the COP432CN is pin-compatible with the ADC0832-N family in the 8-pin PDIP package, including ADC0832CCN and ADC0832CIWM. Pin functions (VCC, CH0, CH1, GND, DI, DO, CLK, CS) match identically per Figure 5 of SNAS531B. However, temperature grade, total unadjusted error (±1 LSB vs. ±½ LSB), and internal VREF connection differ - requiring validation of system-level accuracy and thermal margins when substituting.
COP432CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 1, 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.5V ~ 6.3V
- Voltage - Supply, Digital:
- 4.5V ~ 6.3V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
COP432CN FAQ
1.How can I place an order for COP432CN through Aetrix?
Please submit a Request for Quotation (RFQ) for COP432CN 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 COP432CN reliable?
The price and inventory of COP432CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for COP432CN is usually 5 days.
3.What payment methods are accepted for COP432CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for COP432CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for COP432CN?
COP432CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your COP432CN 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 COP432CN?
For technical support, including COP432CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your COP432CN requirements.
6.How does Aetrix verify that COP432CN is sourced from the original manufacturer or authorized distributors?
All COP432CN 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 COP432CN meets industry standards.
7.What is the process for return or replacement of COP432CN?
All COP432CN units undergo pre-shipment inspection (PSI). If there is an issue with COP432CN, 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 COP432CN part is unused and in its original packaging.
Return procedure for COP432CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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