ADC0834BCN/NOPB - 8-Bit 4-Ch SAR ADC, Serial I/O | TI
Teilenummer: ADC0834BCN/NOPB ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.95 | $4,95 |
| 10 | $4.5 | $45,00 |
| 100 | $3.95 | $395,00 |
| 500 | $3.4 | $1.700,00 |
| 1.000 | $2.95 | $2.950,00 |
ADC0834BCN/NOPB Übersicht
A SAR (Successive Approximation Register) ADC is a type of data converter that resolves one bit per clock cycle by comparing the sampled input against an internal binary-weighted DAC. SAR converters occupy a middle ground between flash ADCs (fastest, lowest resolution) and sigma-delta ADCs (slowest, highest resolution), making them ideal for general-purpose 8-12 bit data acquisition where moderate speed and deterministic latency matter. The ADC0834 belongs to the broader category of precision data converters / signal-chain ICs and integrates a sample-and-hold, internal clock, and configurable analog multiplexer in a single through-hole IC.
Key features include 8-bit resolution with +/-0.5 LSB linearity (typical), single-ended analog inputs, an on-chip clock that eliminates external timing components, and CMOS low-power construction. The serial data output simplifies board routing by reducing pin count and isolating noisy analog ground returns. The /NOPB suffix indicates a lead-free, RoHS-compliant finish.
Typical applications include process control instrumentation, portable measurement equipment, remote data acquisition modules, and embedded microcontroller analog front ends. Designers value the part for its ease of serial integration with legacy microcontrollers that lack built-in ADCs.
When designing with this device, ensure the reference voltage is stable and decoupled, and observe the t_CSD timing when changing the multiplexer channel. The 14-pin PDIP form factor suits legacy designs and prototype work but is being phased out in high-volume new designs in favor of SOIC alternatives.
This page synthesizes distributor pricing, drop-in 14-pin PDIP alternatives, and practical design notes not found in the bare manufacturer datasheet.
Drop-in-Alternativen für ADC0834BCN/NOPB – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ADC0834BCN/NOPB (gleiche Bauform und Footprint) – abweichend in Number of Input Channels, Sampling Rate, Data Interface, Architecture, Input Type.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ADC0834CCN/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADC0834BCN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADC0834BCN/B+
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TLC0834IN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADC0834BCN/NOPB Grenzwerte & elektrische Eigenschaften
| Auflösung | 8 bit |
| Number of Input Channels | 2 or 4 (configurable) |
| Conversion Architecture | SAR (Successive Approximation) |
| Abtastrate | 31 kSPS |
| Data Interface | NSC MICROWIRE, Serial |
| Input Type | Single-Ended |
| Versorgungsspannung | 4.5 V to 5.5 V (5 V nominal) |
| Betriebstemperatur | 0C to 70C (Commercial) |
| Gehäuse / Bauform | 14-DIP (0.300 inch, 7.62 mm) |
| Montageart | Through-Hole |
| Packaging | Tube |
| Number of Terminals | 14 |
| Package Code | DIP |
| Package Shape | Rectangular |
| Temperature Grade | Commercial |
| RoHS-Status | Compliant (lead-free per /NOPB suffix) |
| Internal Clock | Yes (no external clock required) |
ADC0834BCN/NOPB Pin-Konfiguration
| Pin 1 | CS — Chip Select (active low) |
| Pin 2 | CH0 — Analog Input Channel 0 |
| Pin 3 | CH1 — Analog Input Channel 1 |
| Pin 4 | CH2 — Analog Input Channel 2 |
| Pin 5 | CH3 — Analog Input Channel 3 |
| Pin 6 | GND — Analog Ground |
| Pin 7 | VREF — Voltage Reference Input |
| Pin 8 | VCC — +5V Power Supply |
| Pin 9 | CLK — Serial Clock Input |
| Pin 10 | DO — Serial Data Output |
| Pin 11 | DI — Serial Data Input (multiplexer select) |
| Pin 12 | SGND — Signal Ground |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
Typische Anwendungen
ADC0834BCN/NOPB ist geeignet für 6 Anwendungs: Process Control Instrumentation, Portable Measurement Equipment, Remote Data Acquisition Modules, Embedded Microcontroller Analog Front End, Legacy Industrial Control Board Replacement, Educational and Prototyping Platforms.
Process Control Instrumentation
The ADC0834BCN/NOPB's 4 single-ended input channels and 31 kSPS throughput suit it to industrial process-control front-ends that monitor temperature, pressure, and flow signals from 4-20 mA or 0-5 V transducers. Its MICROWIRE-compatible serial interface pairs cleanly with legacy 8051 / PIC microcontrollers lacking built-in ADCs, while the 0-70C commercial temperature range handles shop-floor environments. Placing a 10 uF + 0.1 uF decoupling stack on VCC and a buffered reference pin keeps noise out of the SAR comparator, which directly impacts DNL on low-level signals.
Empfohlen
Portable Measurement Equipment
Battery-powered multimeters and handheld calibrators benefit from the ADC0834BCN/NOPB's low-power CMOS construction and single 5 V supply rail. The internal sample-and-hold combined with the 31 kSPS throughput captures multi-channel sensor sweeps without an external op-amp front end. Through-hole 14-pin PDIP assembly remains common in hand-assembled test gear, and the /NOPB lead-free finish satisfies portable RoHS requirements. For higher-precision meters, the tighter ADC0834CCN/NOPB variant is a direct drop-in upgrade.
Empfohlen
Remote Data Acquisition Modules
RS-485 / Modbus remote I/O modules routinely use the ADC0834BCN/NOPB for 4-channel analog front-ends where the serial MICROWIRE output minimizes pin count on the host MCU. The 8-bit resolution is sufficient for trend logging and setpoint monitoring where +/-1 LSB accuracy is acceptable. Stack the device with an isolation barrier and a 5 V isolated supply to drop ground loops in field installations, and use the channel-selection logic to multiplex thermistor, level, and current-sense inputs sequentially.
Empfohlen
Embedded Microcontroller Analog Front End
Legacy microcontrollers without on-chip ADCs use the ADC0834BCN/NOPB as a tightly-integrated 4-channel analog front end. The 3-wire MICROWIRE interface (CS, CLK, DO) plus DI occupies only four GPIO pins, leaving the remaining ports for digital I/O. The internal clock eliminates an external timer/counter, simplifying firmware. With 31 kSPS throughput, the device comfortably oversamples 4 channels at 7.7 kHz each, suitable for control loops in HVAC, motor control, and instrumentation firmware.
Empfohlen
Legacy Industrial Control Board Replacement
Maintenance and repair operations on existing 4-channel SAR ADC sockets often require a drop-in substitute for end-of-life ADC0831/0832/0834 variants. The ADC0834BCN/NOPB maintains the same 14-pin PDIP footprint and MICROWIRE timing as the original, allowing socket replacement without PCB rework. Verified electrical compatibility (4.5-5.5 V, 31 kSPS, 8-bit) ensures firmware timing loops continue to operate correctly. For higher reliability upgrades, the ADC0834CCN/NOPB tightened linearity grade is a recommended swap.
Empfohlen
Educational and Prototyping Platforms
The through-hole 14-pin PDIP package of the ADC0834BCN/NOPB is ideal for breadboard prototyping and university teaching labs where SMD soldering is impractical. Students wire the 3-wire MICROWIRE interface to a launchpad or Arduino to explore SAR conversion principles, multiplexer channel sequencing, and reference-voltage effects on quantization noise. The part's long-standing market presence guarantees continuous availability for coursework and lab kits, with abundant reference code samples from National Semiconductor and TI application notes.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ADC0834BCN/NOPB – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ADC0834CCN/NOPB | ADC0834BCN | ADC0834BCN/B+ | TLC0834IN |
|---|---|---|---|---|---|
| Package | 14-DIP (7.62mm) | 14-DIP (7.62mm) - same | 14-DIP (7.62mm) - same | 14-DIP (7.62mm) - same | 14-DIP (7.62mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments (National Semi origin) | Texas Instruments |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Sampling Rate | 31 kSPS | 31 kSPS | 31 kSPS | 31 kSPS | ~20 kSPS (-35%) |
| Input Channels | 2 or 4 | 2 or 4 | 2 or 4 | 2 or 4 | 2 or 4 |
| Architecture | Bipolar SAR | Bipolar SAR | Bipolar SAR | Bipolar SAR | LinCMOS SAR |
| Linearity Grade | B (standard) | C (tightened) | B (standard) | B (standard) | Improved |
| Lead-Free / RoHS | Yes (/NOPB) | Yes (/NOPB) | Leaded (pre-RoHS) | Leaded (pre-RoHS) | Yes |
Wichtigste Unterscheidungsmerkmale
- Established 14-pin PDIP availability (vs. TLC0834IN)
- Higher sampling rate (vs. TLC0834IN)
- Standardized lead-free finish (vs. ADC0834BCN (leaded))
Designhinweise
Decouple the VCC pin (pin 8) with a 10 uF electrolytic plus a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin. The ADC0834 SAR comparator draws brief current spikes during the conversion clock edges; insufficient decoupling couples digital noise into the analog input path and degrades DNL. A separate analog ground plane connected to pin 6 (GND) and pin 12 (SGND) at a single point star-ground reduces ground-loop interference.
Route the analog input traces (CH0-CH3) away from the CLK and DO digital lines, using a ground guard trace between analog and digital sections. The MICROWIRE serial output DO toggles at the CLK rate; capacitive coupling into adjacent analog traces manifests as a 1-2 LSB code-dependent error. Place the VREF bypass capacitor as close as possible to pin 7; if VREF is shared with other ICs, buffer it with an op-amp to prevent reference sag during conversion.
Ensure the multiplexer configuration bits are clocked in via DI before the first conversion; leaving DI floating or static produces undefined channel selection. According to TI datasheet timing, the t_CSD setup time must be observed between CS falling edge and the first CLK rising edge. Do not exceed VCC + 0.3 V on any analog input - the input protection diodes clamp overshoot and inject current that biases the next conversion.
Compliance-Informationen
Lead-free per /NOPB suffix; commercial temperature grade 0-70C; not AEC-Q100 qualified (industrial / consumer only).
