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Texas Instruments ADC0809CCVX/NOPB
- Part No.:
- ADC0809CCVX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
ADC0809CCVX/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,898
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Product details
Overview
ADC0809CCVX/NOPB from Texas Instruments is an 8-bit CMOS analog-to-digital converter with integrated 8-channel single-ended multiplexer, successive approximation architecture, ratiometric operation capability, and TTL-compatible TRI-STATE outputs - used in microprocessor-based data acquisition systems for industrial sensor interfacing and embedded control.
For engineers reviewing the ADC0809CCVX/NOPB datasheet, ADC0809CCVX/NOPB pinout, ADC0809CCVX/NOPB application, or ADC0809CCVX/NOPB equivalent, key selection considerations include its 100 μs conversion time, ±1 LSB total unadjusted error over −40°C to +85°C, 5 VDC single supply operation, 8-channel address-latched multiplexer, and PLCC-28 package compatibility with legacy 8080/8085/Z-80 systems.
Technical Context
The ADC0809CCVX/NOPB implements a chopper-stabilized comparator paired with a 256R resistor ladder network and successive approximation register (SAR), delivering monotonic 8-bit conversion without missing codes. Its analog input range spans 0 V to VCC, and it supports ratiometric operation where VREF+ = VCC and VREF− = GND.
Control logic includes latched address inputs (ADD A–C), address latch enable (ALE), start conversion (SC), output enable (OE), and end-of-conversion (EOC) - all TTL-level compatible. Conversion timing is clock-dependent (10–1280 kHz), with typical 640 kHz operation yielding 100 μs conversion time and 15 mW power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete digital output codes across full-scale analog input range. |
| Total Unadjusted Error | ±1 LSB (0°C to 70°C), ±1¼ LSB (−40°C to +85°C) - specifies maximum deviation from ideal transfer curve without calibration. |
| Conversion Time | 100 μs at 640 kHz clock - defines minimum interval between valid conversions in continuous sampling mode. |
| Supply Voltage Range | 4.5 VDC to 6.0 VDC - supports direct interface with standard 5 V logic rails and ratiometric transducer supplies. |
| Input Channel Count | 8 single-ended channels - selected via 3-bit latched address (ADD A/B/C), enabling compact multi-sensor monitoring. |
| Output Interface | TTL-compatible TRI-STATE parallel outputs - allows direct connection to 8080/8085/Z-80 data buses without level-shifting. |
| Power Dissipation | 15 mW at 5 VDC and 640 kHz - enables low-heat operation in dense PCB layouts and battery-sensitive applications. |
Pinout & Package
ADC0809CCVX/NOPB uses a 28-pin Plastic Leaded Chip Carrier (PLCC-FN0028A) package with J-lead configuration, 0.65 mm lead pitch, and 4.57 mm max height - designed for surface-mount assembly and reflow compatibility per JEDEC MS-018.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0–IN7 | Analog input channels | Single-ended voltage inputs selectable via ADD A/B/C; each internally protected by clamping diodes to VCC and GND. |
| ADD A, ADD B, ADD C | Multiplexer address inputs | Latched on rising edge of ALE; define which of 8 analog inputs connects to internal SAR comparator. |
| ALE | Address Latch Enable | Positive-edge-triggered control that captures ADD A/B/C state for channel selection prior to conversion start. |
| START | Start Conversion | Falling-edge-triggered signal initiating SAR cycle; interrupts ongoing conversion if asserted mid-process. |
| EOC | End-of-Conversion flag | Open-drain output goes low during conversion, high when result is ready for readback via OE. |
| OE | Output Enable | Active-high control enabling TRI-STATE digital outputs (D0–D7); required to assert before reading conversion result. |
| D0–D7 | Parallel data outputs | TTL-level, positive-true 8-bit digital word representing quantized analog input value. |
| VREF+, VREF− | Reference voltage terminals | Define full-scale range: VREF+ = VCC, VREF− = GND in ratiometric mode; support symmetric reference configurations. |
| VCC, GND | Power supply | Single 5 V supply powers analog core, digital logic, and internal reference ladder; no separate analog/digital rails needed. |
| CLOCK | External timing input | Accepts 10–1280 kHz square wave; directly controls SAR iteration rate and conversion time precision. |
Key Features
| Feature | Design Value |
|---|---|
| No zero or full-scale adjustment required | Factory-trimmed 256R ladder and chopper-stabilized comparator eliminate field calibration for most industrial sensor interfaces. |
| Ratiometric operation support | Input range tracks VCC; enables direct connection of potentiometers, strain gauges, and bridge sensors without precision reference ICs. |
| Monotonic 8-bit transfer function | 256R ladder ensures no missing codes - critical for closed-loop control stability and position feedback accuracy. |
| Microprocessor-compatible control logic | Latched address and control signals (ALE, START, OE, EOC) simplify timing integration with 8080/8085/Z-80 and SC/MP buses. |
| Low-power CMOS design | 15 mW typical consumption at 5 V/640 kHz allows use in thermally constrained enclosures and extended-life portable instruments. |
Applications
| Industrial Process Monitoring | Automotive Sensor Interface |
|---|---|
Use Scenario: Continuous acquisition of temperature, pressure, and flow sensor outputs in PLC I/O modules. IC Role / Device Role / Timing Role: Central A/D converter managing 8 analog inputs via multiplexed sampling; synchronized to system clock for deterministic scan cycles. Use Value: Eliminates external multiplexer and reference components, reducing BOM count and board area while maintaining ±1 LSB accuracy across −40°C to +85°C. | Use Scenario: Reading throttle position, coolant temperature, and manifold absolute pressure in engine control units (ECUs). IC Role / Device Role / Timing Role: Ratiometric ADC interfacing directly to potentiometric and resistive bridge sensors powered from same 5 V rail as microcontroller. Use Value: Tolerates supply variation and eliminates drift-induced errors - critical for meeting ISO 16750-2 automotive electrical environment requirements. |
| Legacy Microprocessor Data Acquisition | Embedded Test Equipment |
Use Scenario: Retrofitting analog front-end into 8085-based lab instrumentation for voltage/current measurement. IC Role / Device Role / Timing Role: Parallel-output ADC with OE/EOC handshake protocol matching 8085 interrupt and memory-mapped I/O timing. Use Value: Enables drop-in replacement of obsolete MM74C949-1 with identical pinout and timing, preserving existing PCB layout and firmware. | Use Scenario: Portable multimeter or handheld oscilloscope requiring multi-channel DC voltage digitization. IC Role / Device Role / Timing Role: Low-power, self-contained A/D subsystem converting up to 8 sensor inputs at ≤10 kSPS using internal clock divider. Use Value: 15 mW power draw extends battery life; 100 μs conversion time supports real-time display update rates >1 kHz per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multiplexed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC0808CCVX/NOPB | Identical PLCC-28 package and pinout; ±½ LSB error at 25°C vs. ±1 LSB for ADC0809CCVX/NOPB; rated for 0°C to +70°C only. | Suitable for commercial-grade systems with tighter accuracy needs but relaxed temperature range. | Select ADC0808CCVX/NOPB when operating ambient stays within 0–70°C and ±½ LSB error is required at room temperature. |
| MM74C949-1 | Second-source equivalent per TI documentation; identical electrical specs and timing; same PLCC-28 footprint and pin assignment. | Used in legacy military/aerospace designs where dual-sourcing is mandated; identical functional behavior. | Choose MM74C949-1 only when procurement policy requires National Semiconductor heritage parts or cross-manufacturer qualification. |
Compared with ADC0808CCVX/NOPB, the ADC0809CCVX/NOPB trades minor room-temperature accuracy for guaranteed ±1 LSB performance across −40°C to +85°C, while MM74C949-1 offers identical functionality under a different brand - making ADC0809CCVX/NOPB the preferred choice for industrial temperature resilience without layout change.
Availability
ADC0809CCVX/NOPB is available at Aetrix Electronics and suitable for industrial process monitoring, automotive ECU sensor acquisition, and legacy microprocessor-based data loggers requiring stable component supply and long-term obsolescence management.
Supply support for ADC0809CCVX/NOPB 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 high-reliability silicon solutions for industrial, automotive, and communications markets.
The ADC0809CCVX/NOPB belongs to TI's legacy data acquisition product line, engineered for cost-sensitive, microprocessor-integrated analog sensing in environments demanding wide temperature operation and minimal external components.
FAQ
What is the operating temperature range for ADC0809CCVX/NOPB?
The ADC0809CCVX/NOPB is specified for operation from −40°C to +85°C. This industrial temperature grade ensures reliable performance in harsh environments such as factory automation controllers and under-hood automotive electronics. Its ±1¼ LSB total unadjusted error is guaranteed across this full range when powered from 4.5 VDC to 6.0 VDC and clocked at 640 kHz.
Does ADC0809CCVX/NOPB require external zero or full-scale calibration?
No, the ADC0809CCVX/NOPB does not require external zero or full-scale adjustment. Its monolithic CMOS construction integrates a factory-trimmed 256R resistor ladder and chopper-stabilized comparator, ensuring ±1 LSB total unadjusted error without user calibration. This simplifies system design and reduces production test time for ADC0809CCVX/NOPB-based data acquisition modules.
Can ADC0809CCVX/NOPB interface directly with an 8085 microprocessor?
Yes, ADC0809CCVX/NOPB is explicitly designed for easy interface with the 8085 microprocessor. Its TTL-compatible control signals - including ALE, START, OE, and EOC - align with 8085 interrupt and I/O timing. Table 2 in the official datasheet confirms RD/WR/INTR handshaking compatibility, and the latched address logic eliminates need for external address latches in most 8085-based ADC0809CCVX/NOPB implementations.
What is the maximum clock frequency supported by ADC0809CCVX/NOPB?
The ADC0809CCVX/NOPB supports clock frequencies from 10 kHz to 1280 kHz. At the maximum 1280 kHz, conversion time reduces to approximately 90 μs, while at 10 kHz it extends to ~116 μs. For optimal accuracy and noise immunity, TI recommends 640 kHz - the frequency at which key specifications like ±1 LSB error and 15 mW power dissipation are characterized for ADC0809CCVX/NOPB.
Is ADC0809CCVX/NOPB pin-compatible with MM74C949-1?
Yes, ADC0809CCVX/NOPB is pin-compatible and functionally equivalent to MM74C949-1, as confirmed in TI's official documentation. Both devices share identical PLCC-28 packaging, pin assignments, electrical characteristics, timing diagrams, and application circuits. This equivalence enables direct substitution in legacy designs originally specified with MM74C949-1, preserving PCB layout and firmware for ADC0809CCVX/NOPB deployment.
ADC0809CCVX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 10k
- 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:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.5V ~ 6.5V
- Voltage - Supply, Digital:
- 4.5V ~ 6.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC0809CCVX/NOPB FAQ
1.How can I place an order for ADC0809CCVX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC0809CCVX/NOPB 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 ADC0809CCVX/NOPB reliable?
The price and inventory of ADC0809CCVX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC0809CCVX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC0809CCVX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC0809CCVX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC0809CCVX/NOPB?
ADC0809CCVX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC0809CCVX/NOPB 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 ADC0809CCVX/NOPB?
For technical support, including ADC0809CCVX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC0809CCVX/NOPB requirements.
6.How does Aetrix verify that ADC0809CCVX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC0809CCVX/NOPB 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 ADC0809CCVX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC0809CCVX/NOPB?
All ADC0809CCVX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC0809CCVX/NOPB, 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 ADC0809CCVX/NOPB part is unused and in its original packaging.
Return procedure for ADC0809CCVX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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