ADC12130CIWM - 12-Bit+Sign SAR ADC, 2-Ch MUX, Serial I/O | TI
Référence : ADC12130CIWM ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.5 | $9,50 |
| 10 | $8.75 | $87,50 |
| 100 | $7.45 | $745,00 |
| 500 | $6.8 | $3 400,00 |
| 1 000 | $6.1 | $6 100,00 |
ADC12130CIWM Présentation
A SAR ADC is a type of data converter that uses a binary-search successive-approximation algorithm combined with an internal DAC to digitize an analog input one code per clock cycle. It belongs to the ADC -> data converter -> signal chain IC -> mixed-signal semiconductor hierarchy. SAR ADCs are widely preferred when applications demand deterministic latency, low power, no pipeline delay, and moderate sample rates (10 kSPS to 1 MSPS), making them a workhorse for industrial sensors, instrumentation, and process control.
Key differentiating specifications: 12-bit plus sign resolution (effectively 13 bits of dynamic range with bipolar input), built-in 2-channel input MUX for differential or single-ended measurements, self-calibration that nulls offset and linearity errors at power-up, and a serial MICROWIRE interface that reduces pin count versus parallel ADCs. The Wide part maintains roughly two microamps typical supply current in operating mode and supports -40C to +85C industrial temperature range.
From an architecture standpoint, the device uses a charge-redistribution DAC array with a comparator and SAR logic, plus on-chip calibration registers that compensate for internal errors after each power-on reset. The two analog inputs can be configured as two single-ended channels or one fully differential pair, and the digital serial port can be clocked up to approximately 10 MHz, supporting both standalone microcontrollers and DSPs.
Typical applications include industrial process control loops, weigh scales and load cell digitizers, portable battery-powered instrumentation, panel meters, multichannel data loggers, and temperature or pressure sensor signal chains where the built-in MUX and bipolar true-ground measurement are available.
Design tip: provide a clean analog ground plane separated from the digital ground and tie them only at the AGND pin. Decouple VA+ with a 10 uF tantalum in parallel with a 0.1 uF ceramic placed within 5 mm of the pin; insufficient bulk capacitance is the most common cause of conversion noise on this part. The serial interface lines (CS, SCLK, DOUT) should be routed away from the analog inputs to avoid digital coupling.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour ADC12130CIWM — 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 ADC12130CIWM (même facteur de forme et même empreinte) — différant par Package, RoHS Status, Self-Calibration, Architecture, Resolution.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADC12130CIWM/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC12130CIMMX/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC12130CIWMX
✅ Remplacement direct✓ En stock
$5.74 / unité
Voir la fiche technique →ADC12132CIWM/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADC12138CIWM/NOPB
✅ Remplacement direct✓ En stock
$4.66 / unité
Voir la fiche technique →ADC10062CIWM/NOPB
✅ Remplacement direct✓ En stock
$5.85 / unité
Voir la fiche technique →ADC12130CIWM Valeurs maximales et caractéristiques électriques
| Résolution | 12 bit + sign |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 2 (single-ended) / 1 (differential) |
| Input Multiplexer | 2-channel built-in |
| Sample Rate (Max) | 114 kSPS |
| Input Type | Single-ended or differential, bipolar |
| Data Interface | MICROWIRE-compatible serial (3-wire) |
| Analog Supply Voltage | +4.5 V to +5.5 V |
| Digital Supply Voltage | +3.0 V to +5.5 V |
| Plage de température de fonctionnement | -40 C to +85 C |
| Boîtier | 16-SOIC Wide (DW) |
| Nombre de broches | 16 |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (NOPB suffix variant) |
| Self-Calibration | Yes (automatic on power-up) |
Configuration des broches de ADC12130CIWM
| Broche 1 | MODE — Operating mode selection |
| Broche 2 | SCLK — Serial clock input |
| Broche 3 | DOUT — Serial data output (ADC result) |
| Broche 4 | CS — Chip select, active low |
| Broche 5 | DGND — Digital ground |
| Broche 6 | VD+ — Digital supply (+3.0V to +5.5V) |
| Broche 7 | VA+ — Analog supply (+4.5V to +5.5V) |
| Broche 8 | AGND — Analog ground |
| Broche 9 | VREF — Voltage reference input |
| Broche 10 | VIN+ — Analog input (non-inverting) |
| Broche 11 | VIN- — Analog input (inverting) |
| Broche 12 | NC — Not connected (per datasheet) |
| Broche 13 | NC — Not connected (per datasheet) |
| Broche 14 | NC — Not connected (per datasheet) |
| Broche 15 | CAL — Calibration control |
| Broche 16 | PD — Power-down input, active high |
Applications typiques
ADC12130CIWM convient pour 6 applications: Industrial Process Control Loops, Weigh Scales and Load Cell Digitizers, Portable Battery-Powered Instrumentation, Multichannel Data Loggers, Panel Meters and Digital Readouts, Temperature and Pressure Sensor Signal Chains.
Industrial Process Control Loops
The ADC12130CIWM's 12-bit+sign resolution and 114 kSPS sample rate suit 4-20 mA loop digitization in PLC analog input modules, where the built-in 2-channel MUX and bipolar input range directly digitize current-loop-derived voltage signals. Its self-calibration routine on power-up nulls offset and linearity errors that would otherwise drift in field-mounted enclosures spanning -40 C to +85 C, reducing periodic recalibration cycles. The MICROWIRE-compatible serial port keeps the host PLC's GPIO count low and survives the electrical noise of motor drive cabinets.
Recommandé
Weigh Scales and Load Cell Digitizers
Load cell bridge outputs are inherently differential and bipolar, which maps directly onto the ADC12130CIWM's differential input configuration and true-ground measurement capability. The 12-bit+sign dynamic range (effectively 13 bits) provides the signal headroom needed for weighing applications, and the integrated sample-and-hold removes the need for an external track-and-hold. Designers typically pair the part with an INA128 instrumentation amplifier and a low-noise 5 V reference such as the REF02 to achieve stable mg-level resolution in bench scales.
Recommandé
Portable Battery-Powered Instrumentation
Portable handheld instruments benefit from the ADC12130CIWM's low operating current and 5 V single-supply rail, which simplifies battery-powered designs using a 4-cell NiMH or single-cell Li-ion with a boost converter. The 114 kSPS sample rate covers the bandwidth of most physiological and environmental sensors, while the 16-SOIC Wide package survives hand-held drop tests when properly soldered to a rigid-flex carrier. The MICROWIRE port supports low-power sleep modes that extend battery life between measurements.
Recommandé
Multichannel Data Loggers
Multichannel data loggers use the ADC12130CIWM's built-in 2-channel MUX to scan two sensor inputs through a single ADC, eliminating the cost of a second converter in temperature or pressure monitoring nodes. Per the TI datasheet, MUX switching happens through the serial port, so channel sequencing is fully software-controlled without external glue logic. A typical implementation logs thermocouple or RTD-derived voltages to non-volatile memory at sample rates up to 114 kSPS per channel with deterministic latency.
Recommandé
Panel Meters and Digital Readouts
Front-panel digital meters use the ADC12130CIWM to digitize process variables (pressure, flow, level) for display on LCD or LED readouts, leveraging the part's bipolar input range to display both positive and negative process deviations without external signal inversion. The serial interface allows direct drive of the microcontroller driving the display, reducing BOM count. The 12-bit+sign resolution supports 0-100 percent process range displays with 0.025 percent steps when scaled to the panel-meter input.
Recommandé
Temperature and Pressure Sensor Signal Chains
Sensor signal chains that digitize thermocouples, RTDs, strain gauges, or piezoresistive pressure sensors use the ADC12130CIWM's differential input mode to cancel common-mode noise picked up by long sensor cables. The integrated sample-and-hold captures fast transient pressure events without external track-and-hold circuitry. The self-calibration routine on power-up simplifies manufacturing test by removing the need for factory offset/linearity trimming of each channel.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADC12130CIWM — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADC12130CIWM/NOPB | ADC12130CIMMX/NOPB | ADC12130CIWMX | ADC12132CIWM/NOPB | ADC12138CIWM/NOPB | ADC10062CIWM/NOPB |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-SOIC Wide (DW) | 16-SOIC Wide (DW) - same | 16-SOIC Wide (DW) - same | 16-SOIC Wide (DW) - same | 16-SOIC Wide (DW) - same | 16-SOIC Wide (DW) - same | 16-SOIC Wide (DW) - same |
| Resolution | 12 bit + sign | 12 bit + sign | 12 bit + sign | 12 bit + sign | 12 bit + sign | 12 bit + sign | 10 bit |
| Interface | MICROWIRE serial | MICROWIRE serial | MICROWIRE serial | MICROWIRE serial | MICROWIRE serial | MICROWIRE serial | Parallel |
| RoHS Status | Compliant (NOPB variant) | Compliant | Compliant | Non-compliant (non-NOPB) | Compliant | Compliant | Compliant |
| Lifecycle Status | Obsolete | Obsolete (active orderable) | Obsolete (active orderable) | Obsolete | Obsolete (active orderable) | Obsolete (active orderable) | Obsolete |
Principaux différenciateurs
- Built-in self-calibration on power-up (vs Generic 12-bit SAR ADCs (e.g., AD7991, ADS7128))
- Bipolar 12-bit+sign resolution (vs ADC10062CIWM/NOPB)
- MICROWIRE serial interface reduces pin count (vs ADC10062CIWM/NOPB (parallel output))
Notes de conception
Provide a clean analog ground plane on the top layer directly under the ADC12130CIWM, kept separate from the digital ground plane. Tie AGND and DGND only at the IC's AGND pin (pin 8) - a star-ground configuration. Route the analog inputs VIN+ and VIN- as a tightly coupled differential pair to minimize common-mode pickup. Per the TI datasheet, ground noise is the single largest contributor to ADC noise floor; insufficient grounding can degrade SINAD by 6-10 dB.
Decouple VA+ (pin 7) with a 10 uF tantalum in parallel with a 0.1 uF ceramic placed within 5 mm of the pin. Decouple VD+ (pin 6) with a 0.1 uF ceramic. Use a ferrite bead or small inductor (10-22 uH) between VA+ and the digital 5 V rail if they share a source. Insufficient bulk capacitance is the most common cause of conversion noise and self-calibration failure on this part.
Ensure the VREF input (pin 9) is driven by a low-noise, low-drift reference such as REF02 or REF195. A noisy or unstable reference directly couples into the conversion result. Self-calibration is initiated by a falling edge on the CAL pin (pin 15) after power-up; do not skip this step or the device will use uncalibrated default trim values. The PD pin (pin 16) must be tied low for normal operation; leaving it floating can put the device into an undefined state.
Route the serial interface lines (SCLK pin 2, DOUT pin 3, CS pin 4) away from the analog inputs and any switching power traces. Keep these traces short (under 50 mm) and surround them with ground. Add a small series resistor (33-100 ohm) on SCLK close to the source if ringing is observed on long cable connections to a remote microcontroller.
Informations de conformité
ADC12130CIWM (non-NOPB) is non-RoHS; ADC12130CIWM/NOPB and ADC12130CIMMX/NOPB are lead-free and RoHS compliant per TI product page. Not AEC-Q100 qualified - this part is industrial-grade (-40 C to +85 C), not automotive.
