ADC12034CIN/NOPB - 12-Bit+Sign 4-Ch SAR ADC | Texas Instruments
Référence : ADC12034CIN/NOPB ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.78 | $9,78 |
| 10 | $8.85 | $88,50 |
| 100 | $7.42 | $742,00 |
| 500 | $6.34 | $3 170,00 |
| 1 000 | $5.61 | $5 610,00 |
ADC12034CIN/NOPB Présentation
An SAR (Successive Approximation Register) ADC is a class of analog-to-digital converter that uses an iterative binary search against a precision DAC to resolve each conversion in N+1 clock cycles. SAR ADCs sit in the broader taxonomy of Nyquist-rate data converters, between flash converters (fast, low resolution) and sigma-delta converters (high resolution, lower bandwidth). Within TI's data-converter portfolio, the ADC12034 belongs to the ADC12030/ADC12H030 family, distinguished by their on-chip calibration logic and sign-bit output that doubles the effective dynamic range for bipolar sensor signals without an external front-end op-amp.
Key features include 12-bit plus sign resolution (effectively 13 bits of dynamic range), 4 single-ended or 2 differential analog input channels multiplexed at the ADC core, self-calibration of offset and gain on command, a serial MICROWIRE/QSPI/SPI-compatible digital interface, and an operating temperature range of -40C to +85C. The on-chip sample-and-hold acquires inputs in approximately 1.2 us, while the successive-approximation engine completes conversion in 13 clock cycles, giving a maximum throughput of 182 kSPS when clocked at the rated frequency.
The ADC12030 family was architected around a charge-redistribution DAC array using thin-film polysilicon resistors, calibrated at power-up or on demand via the CAL pin. After calibration, the typical INL is held within +/- 1 LSB and DNL shows no missing codes at 12 bits, as documented in the manufacturer datasheet. This calibration scheme eliminates the need for external reference trimming and gives the ADC12034 stable DC performance across the full industrial temperature range.
Typical applications include process-control instrumentation, multi-channel thermocouple and strain-gauge signal chains, panel-meter and weigh-scale front-ends, portable data loggers, and industrial sensor hubs where a single ADC must sequentially digitize several low-bandwidth analog sources.
When selecting this part, note that the ADC12034 is offered in PDIP-24 (this part), SOIC-24 (ADC12034CIM/NOPB), and PLCC-28 (ADC12034CIQ/NOPB) variants - choose the through-hole PDIP when hand prototyping or when socket replacement is desired. Provide a clean +5V analog supply and a stable external reference; expect typical integral nonlinearity around +/-1 LSB after calibration.
This page synthesizes current distributor pricing, true drop-in alternatives from the same ADC12030/ADC12038 family, and practical layout notes not aggregated in the manufacturer datasheet.
Alternatives de remplacement direct pour ADC12034CIN/NOPB — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADC12038CIN/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC12030CIN/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC12032CIN/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC12H030CIN/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS7818P
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC12034CIN/NOPB Valeurs maximales et caractéristiques électriques
| Résolution | 12 bit + sign (13-bit effective dynamic range) |
| Architecture | Successive Approximation Register (SAR) |
| Number of Input Channels | 4 single-ended or 2 differential |
| Fréquence d'échantillonnage | 182 kSPS (maximum) |
| Input Type | Single-ended / Pseudo-differential (sign bit) |
| Data Interface | MICROWIRE / QSPI / SPI compatible, serial |
| Number of ADC Channels | 1 (with internal analog MUX) |
| Reference Type | External (provided by user) |
| Température de fonctionnement | -40C to +85C (industrial) |
| Boîtier | 24-DIP (0.300 inch, 7.62 mm) through-hole |
| Nombre de broches | 24 |
| Type de montage | Through-Hole |
| Self-Calibration | On-chip offset and gain calibration (CAL pin) |
| Sample-and-Hold | Integrated, ~1.2 us acquisition |
| Statut RoHS | Compliant (NOPB suffix indicates lead-free) |
Configuration des broches de ADC12034CIN/NOPB
| Broche 1 | CH0 — Analog input channel 0 |
| Broche 2 | CH1 — Analog input channel 1 |
| Broche 3 | CH2 — Analog input channel 2 |
| Broche 4 | CH3 — Analog input channel 3 |
| Broche 5 | VREF+ — External reference voltage, positive |
| Broche 6 | VREF- — External reference voltage, negative (ground reference) |
| Broche 7 | VSS — Analog ground |
| Broche 8 | VDD — Analog supply voltage, +5V nominal |
| Broche 9 | CAL — Calibration enable (active high) |
| Broche 10 | SCLK — Serial clock input |
| Broche 11 | DOUT — Serial data output (MSB first) |
| Broche 12 | EOC — End-of-conversion flag (active low) |
| Broche 13 | CS — Chip select (active low) |
| Broche 14 | DGND — Digital ground |
| Broche 15 | DVDD — Digital supply voltage (typically +5V) |
| Broche 16 | NC — Not connected (reserved per datasheet) |
| Broche 17 | NC — Not connected (reserved per datasheet) |
| Broche 18 | NC — Not connected (reserved per datasheet) |
| Broche 19 | NC — Not connected (reserved per datasheet) |
| Broche 20 | NC — Not connected (reserved per datasheet) |
| Broche 21 | NC — Not connected (reserved per datasheet) |
| Broche 22 | NC — Not connected (reserved per datasheet) |
| Broche 23 | NC — Not connected (reserved per datasheet) |
| Broche 24 | NC — Not connected (reserved per datasheet) |
Applications typiques
ADC12034CIN/NOPB convient pour 7 applications: Process Control Multi-Channel Data Acquisition, Thermocouple and Strain-Gauge Front Ends, Weigh Scale and Load Cell Digitizer, Portable Multi-Sensor Data Loggers, Industrial Panel-Meter Front Ends, Automotive Sensor Hubs (Non-Safety), Educational / Lab Instrumentation.
Process Control Multi-Channel Data Acquisition
The ADC12034CIN/NOPB's 4-channel MUX and 12-bit+sign SAR architecture make it an excellent fit for process-control data-acquisition modules that must digitize several low-bandwidth sensor signals with one part. Placed near field-terminal blocks on the PCB, the MUX sequentially scans pressure, flow, and temperature transducers while the on-chip sample-and-hold and 182 kSPS burst conversion give sub-millisecond acquisition per channel. Industrial-grade -40C to +85C operation ensures the same performance envelope is maintained in factory-floor environments where temperature swings and electrical noise are routine.
Recommandé
Thermocouple and Strain-Gauge Front Ends
The sign-bit output of the ADC12034CIN/NOPB lets it digitize bipolar thermocouple and strain-gauge bridge signals directly, eliminating the external instrumentation amplifier typically required for bipolar ADC inputs. Each channel of the 4-input MUX is paired with a low-offset preamp whose millivolt-level output is captured by the SAR core at 12-bit+sign resolution (~2.4 mV LSB) and self-calibrated on power-up. The 24-DIP package is convenient for breadboard prototyping of precision analog front ends during R&D before committing to surface-mount production hardware.
Recommandé
Weigh Scale and Load Cell Digitizer
In battery-powered weigh-scale designs, the ADC12034CIN/NOPB's on-chip calibration and pseudo-differential sign bit allow a single conversion channel to read a load-cell bridge with bipolar excitation directly. The serial MICROWIRE output connects to a low-power MSP430 or similar microcontroller, and the ~6 mW analog supply current keeps battery drain modest when idle between conversions. The through-hole DIP-24 package also simplifies debugging in custom prototyping enclosures used by low-volume scale integrators.
Recommandé
Portable Multi-Sensor Data Loggers
Handheld battery-powered data loggers for environmental and inventory monitoring benefit from the ADC12034CIN/NOPB's 4-channel MUX that lets a single ADC digitize temperature, humidity (via analog transducer), voltage, and current-sense channels. The MICROWIRE serial output uses only four microcontroller pins, leaving more GPIOs for SD-card interfacing, displays, and user keys. The industrial -40C to +85C rating matches the operating envelope expected of portable field-deployed loggers, and the through-hole pinout simplifies field service and field-replaceable instrumentation modules.
Recommandé
Industrial Panel-Meter Front Ends
Front-panel digital meters in industrial enclosures typically read one or more 4-20 mA or 0-10 V analog signals, and the ADC12034CIN/NOPB provides a cost-effective four-channel digitizer in a robust through-hole format suited to through-panel wiring harnesses. The MUX input channels can each be assigned to a different process variable while the SAR core sequentially refreshes LED or LCD displays at a few Hz each. The on-chip self-calibration stabilizes accuracy over the panel-meter's service life, even as components age in elevated-temperature control-cabinet environments.
Recommandé
Automotive Sensor Hubs (Non-Safety)
While ADC12034CIN/NOPB is industrial-grade, the ADC12030/ADC12H030 family is also offered in AEC-Q100-qualified variants that share its architecture and serial interface, making the platform well-suited to non-safety automotive sensor hubs that digitize temperature, position, and pressure transducers for body, chassis, and infotainment subsystems. The 4-channel MUX reduces harness complexity, while the 12-bit+sign resolution comfortably covers 5V span automotive sensors. Designers can prototype with the industrial-grade PDIP-24 part and migrate to the -Q grade PLCC-28 variant with the same software once the design is validated.
Recommandé
Educational / Lab Instrumentation
The through-hole 24-DIP package and straightforward MICROWIRE serial interface make the ADC12034CIN/NOPB a popular choice for university electronics and instrumentation labs. Students wire the part on breadboards to learn successive-approximation conversion, MUX operation, and on-chip self-calibration without needing reflow or fine-pitch SMD soldering. The application-note-supported reference designs are easy to construct on lab power supplies and provide reusable lab modules for coursework covering data acquisition, signal integrity, and embedded serial interfacing.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADC12034CIN/NOPB — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADC12038CIN/NOPB | ADC12030CIN/NOPB | ADC12032CIN/NOPB | ADC12H030CIN/NOPB | ADS7818P |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 24-DIP (0.300 inch) through-hole | 24-DIP (0.300 inch) through-hole - same | 24-DIP (0.300 inch) through-hole - same | 24-DIP (0.300 inch) through-hole - same | 24-DIP (0.300 inch) through-hole - same | 24-DIP (0.300 inch) through-hole - same |
| Resolution | 12 bit + sign (13-bit dynamic) | 12 bit + sign | 12 bit + sign | 12 bit + sign | 12 bit + sign | 12 bit |
| Sampling Rate | 182 kSPS | ~365 kSPS (higher) | ~182 kSPS | ~182 kSPS | ~365 kSPS | ~200 kSPS |
| Number of Input Channels | 4 single-ended / 2 differential | 4 / 2 | 2 / 1 | 2 / 1 | 8 / 4 | 1 (single channel) |
| Architecture | SAR (Successive Approximation) | SAR | SAR | SAR | SAR | SAR |
| Serial Interface | MICROWIRE / QSPI / SPI compatible | MICROWIRE / QSPI / SPI | MICROWIRE / QSPI / SPI | MICROWIRE / QSPI / SPI | MICROWIRE / QSPI / SPI | Serial synchronous |
| Self-Calibration | On-chip offset + gain (CAL pin) | On-chip | On-chip | On-chip | On-chip | None (factory-trimmed) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principaux différenciateurs
- Pin-compatible higher-throughput upgrade available in same package (vs ADC12038CIN/NOPB)
- Same family, fewer channels, same pinout (vs ADC12030CIN/NOPB)
- More input channels in same package family (vs ADC12H030CIN/NOPB)
- Modern alternative for new designs (vs ADS7818P)
Notes de conception
Estimated: Decouple VDD (pin 8) and DVDD (pin 15) with a 100 nF ceramic capacitor placed within 5 mm of the supply pins, plus a bulk 10 uF tantalum capacitor at the supply entry. Decouple VREF+/VREF- (pins 5/6) with a 100 nF ceramic directly at the package to suppress reference-injected kickback during SAR bit trials.
Estimated: Route the analog MUX inputs (CH0-CH3, pins 1-4) on the same layer as the ADC and avoid crossing digital MICROWIRE lines (SCLK, DOUT, CS, EOC). Place a single-star ground connection at pin 14 (DGND) tied to the analog ground at pin 7 (VSS) to prevent ground-loop noise injection from digital return currents into the SAR reference.
Always trigger on-chip calibration after power-up or after a large change in reference voltage by toggling the CAL pin (pin 9). Issuing the calibration sequence cold-start eliminates first-conversion offset errors that otherwise contaminate the first channel sampled after each power-up. The CAL sequence takes ~2800 clock cycles per the TI datasheet, so account for this in software initialization routines.
The MICROWIRE interface (SCLK, DOUT, CS) is sensitive to clock-edge ringing on long PCB traces. Estimated: keep SCLK traces under 30 mm and source-terminate with 33 ohm if the MCU is more than 50 mm away. The EOC output is an open-drain flag and requires a pull-up resistor (typ. 10 kohm) to DVDD to operate reliably in noisy environments.
Informations de conformité
The /NOPB suffix explicitly indicates lead-free (Pb-free) terminal plating per TI part-numbering conventions. Industrial-grade only - AEC-Q100 automotive qualification requires the -Q grade (CIQ) variant, not the PDIP-24 (CIN) variant. Halogen-free status not explicitly disclosed for this through-hole package.
