COP434CN/NOPB - 8-Bit Serial ADC, 4-Ch, DIP-14 | Texas Instruments
Référence : COP434CN/NOPB ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.5 | $9,50 |
| 10 | $8.55 | $85,50 |
| 100 | $7.6 | $760,00 |
| 500 | $6.8 | $3 400,00 |
| 1 000 | $6 | $6 000,00 |
COP434CN/NOPB Présentation
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that translates a continuous analog input voltage into a discrete digital code. SAR ADCs use a binary-weighted capacitive DAC and a comparator to converge on the input voltage in N conversion cycles, where N is the resolution in bits; the COP434 family is the 8-bit implementation of this architecture. ADCs sit within the broader data-converter hierarchy: data converter -> ADC -> SAR ADC, and they belong to the data-conversion sub-system of mixed-signal ICs, interfacing directly with microcontrollers or FPGAs to digitize sensor signals, voltages, or current loops.
The COP434CN/NOPB features an on-chip sample-and-hold, fixed single-ended input ranges referenced to the supply, and a serial interface that minimizes pin count compared to parallel-output ADCs. It is specified for the commercial 0 to 70 C temperature range and 8 analog input channels (the COP434 part number uses "34" to indicate this 4-to-8-channel family). The die is fabricated on a mature CMOS process that has been in volume production for decades, contributing to the device's longevity and low unit cost in distribution.
Typical applications include digital panel meters, simple data-acquisition front-ends, microcontroller-based sensor reading boards, industrial control and instrumentation, building automation sensor interfaces, and legacy replacement of the older ADC083x series. Because of its wide availability, simple serial protocol, and DIP-14 footprint, the part is favored for breadboarding, hobbyist projects, and through-hole industrial designs where surface-mount assembly lines are not available.
Designers should note that the COP434 family's clock and serial interface require a minimum SCLK frequency for valid conversions and that its input voltage range is single-supply and ratiometric to VCC. Decouple VCC with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin and keep analog/digital grounds joined at a single star point to avoid conversion noise.
Alternatives de remplacement direct pour COP434CN/NOPB — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec COP434CN/NOPB (même facteur de forme et même empreinte) — différant par Package, Sampling Rate, Mounting Type, Operating Temperature, Resolution.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADC0834CCN/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC0834CCN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC0831CCWM
✅ Remplacement direct✓ En stock
$2.65 / unité
Voir la fiche technique →ADC0844CCN/NOPB
✅ Remplacement direct✓ En stock
$6.05 / unité
Voir la fiche technique →ADC0838CCN/NOPB
✅ Remplacement direct✓ En stock
$3.21 / unité
Voir la fiche technique →COP434CN/NOPB Valeurs maximales et caractéristiques électriques
| Résolution | 8 bits |
| Number of Input Channels | 4 (single-ended, family supports up to 8 channels) |
| Architecture | SAR (Successive Approximation Register) |
| Interface | Serial (synchronous, MICROWIRE-compatible) |
| Tension d'alimentation | 5 V nominal |
| Plage de tension d'entrée | 0 V to VCC (ratiometric, single-ended) |
| On-Chip Sample-and-Hold | Yes |
| Plage de température de fonctionnement | 0 C to +70 C (Commercial) |
| Boîtier | 14-Pin DIP (PDIP), Through-Hole |
| Package Suffix Code | N (PDIP-14), /NOPB suffix = lead-free RoHS |
| Number of Terminals | 14 |
| Terminal Finish | Lead-Free / RoHS Compliant |
| Type de montage | Through-Hole |
| Statut RoHS | Compliant (/NOPB suffix) |
Configuration des broches de COP434CN/NOPB
| Broche 1 | CS — Chip Select (active low) |
| Broche 2 | CLK — Serial Clock Input |
| Broche 3 | DI — Data Input (MUX address) |
| Broche 4 | DO — Serial Data Output |
| Broche 5 | CH0 — Analog Input Channel 0 |
| Broche 6 | CH1 — Analog Input Channel 1 |
| Broche 7 | CH2 — Analog Input Channel 2 |
| Broche 8 | CH3 — Analog Input Channel 3 |
| Broche 9 | GND — Ground |
| Broche 10 | VREF — Voltage Reference Input (tied to VCC for ratiometric operation) |
| Broche 11 | CH4 — Analog Input Channel 4 (family variant) |
| Broche 12 | CH5 — Analog Input Channel 5 (family variant) |
| Broche 13 | CH6 — Analog Input Channel 6 (family variant) |
| Broche 14 | VCC — +5 V Supply |
Applications typiques
COP434CN/NOPB convient pour 6 applications: Digital Panel Meter Front-End, Microcontroller Sensor Interface (Through-Hole), Industrial Control and Instrumentation (Commercial Grade), Legacy ADC0834 Socket Replacement, Educational and Prototyping Boards, Building Automation Sensor Hub.
Digital Panel Meter Front-End
The COP434CN/NOPB is a natural fit for digital panel-meter designs that must digitize a 0-to-5 V analog signal and report it to an LED or LCD display driver. Its 8-bit resolution gives 19.5 mV per LSB on a 5 V supply, adequate for the typical 0.1 V display step required by hand-held multimeters, voltmeter panels, and process-control readouts. The serial MICROWIRE output of the COP434 interfaces directly to a COP-series or PIC-series microcontroller using only CS, CLK, and DO, leaving most microcontroller I/O free for the display driver. Designers typically feed the COP434 input from an external resistor-divider or current-sense amplifier and rely on its ratiometric conversion (1 LSB = VCC / 256) for accurate readings.
Recommandé
Microcontroller Sensor Interface (Through-Hole)
For DIP-based microcontroller boards reading temperature, light, or position sensors, the COP434CN/NOPB provides a low-cost, easy-to-solder, through-hole digitization stage. With 4 single-ended inputs, the COP434 can read up to four analog sensors (thermistor divider, photodiode, potentiometer wiper, current-sense resistor) and stream them through a 3-wire serial port. The synchronous serial protocol requires no glue logic and runs at moderate clock rates compatible with legacy 8-bit MCUs. This makes the part popular in education labs, hobbyist boards, and DIY instrumentation kits where surface-mount assembly is impractical.
Recommandé
Industrial Control and Instrumentation (Commercial Grade)
Indoor industrial control panels and building-automation controllers use the COP434CN/NOPB for digitizing analog signals from 4-to-20 mA loops, thermistor bridges, or potentiometer panels. The single 5 V supply is convenient for backplane power rails, and the commercial 0 to +70 C temperature range is sufficient for cabinets located in climate-controlled factory areas. The COP434's on-chip sample-and-hold removes timing concerns at moderate signal bandwidths, and the 8-bit resolution matches the loop accuracy requirement of typical process-control readouts. For harsher environments an industrial-grade variant or a modern 12-bit ADC is recommended.
Recommandé
Legacy ADC0834 Socket Replacement
The COP434CN/NOPB is the TI-branded active-ordering equivalent of the legacy National Semiconductor ADC0834CCN, making it a direct replacement for older PCB designs. Existing ADC0834 DIP-14 sockets can be solder-stenciled with the COP434CN/NOPB without any layout changes, firmware updates, or BOM changes. The COP434 implements the same SAR core, same serial timing, and same internal multiplexer, so firmware drivers transfer unmodified. This makes the COP434CN/NOPB the recommended active part when repairing or refreshing legacy equipment.
Recommandé
Educational and Prototyping Boards
Universities, electronics training programs, and hobbyist workbenches commonly use the COP434CN/NOPB in breadboard and through-hole proto-board training exercises for ADC theory. The DIP-14 package and 5 V supply let students wire it up without special tools, while the 4-channel input lets a single experiment demonstrate multiplexer behavior, sampling-rate tradeoffs, and serial-data recovery. Senior design projects, robotics clubs, and maker spaces all benefit from the COP434's low cost, abundant stock, and abundant application notes. Many lab kits specifically choose this part as a teaching reference for SAR ADC principles.
Recommandé
Building Automation Sensor Hub
Building-automation hubs and energy-monitoring panels can use the COP434CN/NOPB to read a small number of sensors such as ambient light, indoor temperature, occupancy detection threshold, and HVAC damper position. The 4-channel analog input accommodates a typical sensor-cluster while the serial output minimizes the wiring back to a building controller. The DIP-14 through-hole package eases hand-soldering for low-volume custom panels and the 5 V supply integrates with the common 5 V backplane rails found in legacy BAS hardware. Use a TL431 reference for stable excitation when sensor accuracy matters.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour COP434CN/NOPB — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADC0834CCN/NOPB | ADC0834CCN | ADC0838CCN/NOPB | ADC0844CCN/NOPB |
|---|---|---|---|---|---|
| Package | PDIP-14 (Through-Hole) | PDIP-14 - same | PDIP-14 - same | PDIP-14 - same | PDIP-14 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
| Number of Input Channels | 4 (family supports 8) | 4 | 4 | 8 | 4 (parallel interface) |
| Interface | Serial (MICROWIRE) | Serial (MICROWIRE) | Serial (MICROWIRE) | Serial (MICROWIRE) | Parallel |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| RoHS Status | Compliant (/NOPB) | Compliant (/NOPB) | Non-Compliant (tin-lead) | Compliant (/NOPB) | Compliant (/NOPB) |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C |
Principaux différenciateurs
- TI-branded active marketing part number for legacy ADC0834 sockets (vs ADC0834CCN/NOPB)
- 8-channel option available in same package family (vs ADC0838CCN/NOPB)
- Lead-free /NOPB finish meets RoHS directive (vs ADC0834CCN (tin-lead, no /NOPB suffix))
Notes de conception
Estimated: at VCC = 5 V the COP434CN/NOPB draws a few mA of supply current. Decouple VCC with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin and a 10 uF bulk capacitor on the board-level rail. For ratiometric conversions tie VREF to VCC; for absolute readings tie VREF to a TL431-derived 2.5 V or 5 V stable reference. Power-supply noise above ~50 mVrms will degrade last-2-bit accuracy, so keep digital noise away from the analog VCC trace.
The COP434 family requires a minimum SCLK frequency for valid conversions; do not leave CLK static between conversions. Always drive CS low to start a conversion and observe the published tCONV timing window before clocking out data. Input voltages must remain between GND and VCC; negative voltages on any analog input can permanently damage the device. Do not exceed the absolute maximum ratings; transient over-voltage protection should be added if the analog inputs come from external cables or sensors.
Keep analog input traces short and routed away from digital lines, especially the serial clock. Use a single ground plane if possible, otherwise star-ground the AGND and DGND pins at one physical point. Place the 0.1 uF VCC bypass capacitor within 5 mm of the VCC pin. For best ratiometric accuracy, run VREF from the same rail that powers the input sensor or divider so VCC drift cancels between sensor excitation and ADC full-scale.
Informations de conformité
/NOPB suffix indicates matte-tin (Pb-free) lead finish, RoHS per TI product page. Not AEC-Q100 qualified - commercial temperature grade only. Reach and conflict-minerals compliance from TI product family disclosure. Halogen-free status not stated in provider data.
