ADC101S051CISDX - 10-Bit 500kSPS 1-Ch SAR ADC SPI | Texas Instruments
Référence : ADC101S051CISDX ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.85 | $185,00 |
| 500 | $1.52 | $760,00 |
| 1 000 | $1.28 | $1 280,00 |
ADC101S051CISDX Présentation
A SAR ADC is a comparator-based converter that performs a binary search across an internal capacitor DAC during each conversion cycle. Unlike delta-sigma or pipeline ADCs, no latency is introduced between sampling and conversion results, making SAR architecture ideal for multiplexed data acquisition, motor control feedback loops, and any application requiring deterministic per-sample throughput. The ADC101S051 family is positioned in the data-converter hierarchy as: ADC -> SAR ADC -> single-channel low-power ADC -> precision mixed-signal IC.
Key specifications include a sample rate that scales from 200 kSPS to 500 kSPS, straight-binary serial output compatible with SPI, QSPI, MICROWIRE, and common DSP serial interfaces, an industrial operating temperature range of -40C to +85C, and a 6-pin LLP/WSON footprint optimized for compact PCB layouts. The CISDX suffix denotes the 6-WSON package shipped on tape and reel.
Typical applications include portable and battery-powered instrumentation, multi-channel sensor monitoring with external multiplexing, optical-module monitoring, motor-control current sensing, and consumer audio front ends where 10-bit resolution is sufficient. The wide supply range allows direct connection to 3.3V or 5V rails without level shifters.
When designing with the ADC101S051CISDX, place 0.1uF decoupling capacitors as close as possible to the supply pin and keep the analog input trace short and guarded to avoid digital switching noise coupling into the sampled voltage. The SCLK frequency must be chosen so the full 16-cycle conversion completes before the next CS falling edge.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not available on a single DigiKey or Mouser product page, including cross-brand alternatives and parametric trade-offs that are useful when sourcing alternatives.
Alternatives de remplacement direct pour ADC101S051CISDX — 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 ADC101S051CISDX (même facteur de forme et même empreinte) — différant par Package, Digital Interface, Resolution, Operating Temperature, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADC101S051CISD
✅ Remplacement direct✓ En stock
$0.78 / unité
Voir la fiche technique →ADC101S021CISDX
✅ Remplacement direct✓ En stock
$1.32 / unité
Voir la fiche technique →ADC101S021CIMFX
✅ Remplacement direct✓ En stock
$1.4 / unité
Voir la fiche technique →ADC081S051CISDX/NOPB
✅ Remplacement direct✓ En stock
$1.62 / unité
Voir la fiche technique →ADC081S051CISD
✅ Remplacement direct✓ En stock
$1.85 / unité
Voir la fiche technique →ADC081S021CISD
✅ Remplacement direct✓ En stock
$0.65 / unité
Voir la fiche technique →ADC101S051CISDX Valeurs maximales et caractéristiques électriques
| Résolution | 10 bit |
| Number of Channels | 1 |
| Architecture | SAR |
| Sample Rate | 200 kSPS to 500 kSPS |
| Plage de tension d'entrée | 0 V to 5.25 V (rail-tracking) |
| Supply Voltage (VDD) | 2.7 V to 5.25 V |
| Supply Current (typ at 500 kSPS, 5.25V) | 1.85 mA (9.7 mW) |
| Supply Current (typ at 500 kSPS, 3.6V) | 0.75 mA (2.7 mW) |
| Digital Interface | SPI / QSPI / MICROWIRE / DSP-compatible serial |
| Output Format | Straight binary, 16-cycle serial frame |
| Température de fonctionnement | -40 C to +85 C |
| Boîtier | 6-pin WSON (6-WSON EP) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
| Lead-Free | Yes |
| Input Type | Single-ended |
Configuration des broches de ADC101S051CISDX
| Broche 1 | CH0 — Analog input channel 0 (single-ended) |
| Broche 2 | VDD — Power supply (+2.7V to +5.25V) |
| Broche 3 | GND — Ground reference |
| Broche 4 | DOUT — Serial data output (SPI MISO) |
| Broche 5 | SCLK — Serial clock input |
| Broche 6 | CS — Chip select (active low) |
Applications typiques
ADC101S051CISDX convient pour 6 applications: Portable Battery-Powered Instrumentation, Multi-Channel Sensor Monitoring with External MUX, Optical Module Monitoring (SFP/QSFP), Motor Control Current Sensing, Consumer Audio Front-End Sampling, Industrial Process Control Analog Inputs.
Portable Battery-Powered Instrumentation
The ADC101S051CISDX fits portable instrumentation because it draws only 2.7 mW typical at 3.6V supply and operates from a single 2.7V-5.25V rail, matching common Li-ion and 2xAA battery stacks. Its 10-bit resolution is sufficient for handheld multimeters, environmental loggers, and field data-acquisition tools where conversion latency must be deterministic. Placed between a sensor front-end and a low-power MCU, the SPI-compatible serial interface keeps pin count low. Unlike delta-sigma ADCs, the SAR architecture introduces no pipeline delay, so each CS frame yields a fresh conversion result immediately - critical for triggering-based measurements. Trade-off: at 500 kSPS the part still consumes ~1.85 mA continuous, so duty-cycling the CS pin between bursts is recommended.
Recommandé
Multi-Channel Sensor Monitoring with External MUX
When paired with an external analog multiplexer, the ADC101S051CISDX can digitize 4-8 sensor channels through a single ADC. The 500 kSPS throughput allows a 4-channel MUX to be scanned at >100 kSPS per channel, suitable for thermocouple arrays, strain-gauge bridges, and gas-sensor monitoring panels. Its 0-5.25V single-ended input spans most sensor output ranges without instrumentation amplifiers. Unlike integrating ADCs, the SAR architecture does not require integration time trade-offs against noise. Performance consideration: MUX on-resistance and settling time must be budgeted into the acquisition window; aim for the SCLK + MUX-settle window to settle within 1 LSB before conversion starts.
Recommandé
Optical Module Monitoring (SFP/QSFP)
The ADC101S051CISDX is widely used in SFP/QSFP optical transceiver modules to digitize the analog monitor pins (Tx power, Rx power, temperature, laser bias). Its small 6-WSON package fits the constrained module PCB area, and the 500 kSPS sample rate exceeds the bandwidth required for laser-diode bias control loops. The wide 2.7V-5.25V supply range matches module 3.3V rails directly. Unlike dedicated DOM (digital optical monitoring) chips, this generic ADC gives flexibility for custom threshold algorithms. Trade-off: firmware must implement averaging and threshold detection, since the device does not include integrated comparators.
Recommandé
Motor Control Current Sensing
For BLDC or stepper motor control, the ADC101S051CISDX can digitize shunt-resistor current-sense signals at the FSW and sub-Harmonic bandwidths needed for FOC (field-oriented control) or trapezoidal commutation. The 500 kSPS sample rate supports >20 kHz PWM frequencies with multiple samples per PWM cycle for current averaging. Its SPI-compatible serial interface connects directly to most motor-control MCUs. Unlike Hall-effect current sensors, shunt-resistor + ADC provides higher bandwidth and DC accuracy. Performance trade-off: 10-bit resolution limits low-current precision; for sub-100 mA motor currents, consider the 12-bit ADC121S101CISDX in the same package.
Recommandé
Consumer Audio Front-End Sampling
In low-cost consumer audio products, the ADC101S051CISDX can digitize auxiliary analog signals such as microphone preamp outputs, line-in jacks, or potentiometer position voltages for digital volume control. The 10-bit resolution is adequate for voice-band signal detection (not high-fidelity audio). Its 6-WSON small footprint fits compact headphone and Bluetooth-speaker PCBs. Unlike dedicated audio codecs, this ADC is much simpler to integrate but lacks decimation filters. Trade-off: for actual music-quality audio, use a dedicated audio ADC with >=16-bit resolution and >44 kSPS throughput.
Recommandé
Industrial Process Control Analog Inputs
The ADC101S051CISDX digitizes 0-5V or 4-20 mA (via burden resistor) process-control signals for PLCs, SCADA remote terminals, and industrial sensor hubs. Its industrial -40C to +85C temperature range and SPI interface support rugged embedded deployments. Unlike delta-sigma ADCs with integrated PGAs, this device needs an external front-end for low-level inputs. Performance trade-off: at 10 bits it cannot replace the 16+ bit ADCs used in precision weighing or strain measurement, but it is well matched to on/off/fan-of state monitoring such as pressure switches or flow meters.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADC101S051CISDX — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADC101S051CISD | ADC101S021CISDX | ADC081S051CISDX/NOPB | ADC081S021CISD |
|---|---|---|---|---|---|
| Package | 6-WSON | 6-WSON - same | 6-WSON - same | 6-WSON - same | 6-WSON - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 10 bit | 10 bit - same | 10 bit - same | 8 bit (-2 LSBs) | 8 bit |
| Max Sample Rate | 500 kSPS | 500 kSPS - same | 200 kSPS (-60%) | 500 kSPS - same | 200 kSPS |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V - same | 2.7V to 5.25V - same | 2.7V to 5.25V - same | 2.7V to 5.25V - same |
| Channels | 1 | 1 - same | 1 - same | 1 - same | 1 - same |
| Power @ 3.6V | 2.7 mW | 2.7 mW - same | Lower (200 kSPS) | Similar (~2.7 mW) | Lower (8-bit, 200 kSPS) |
| Operating Temperature | -40C to +85C | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
Principaux différenciateurs
- Wide 2.7V-5.25V single-supply operation (vs ADC101S021CISDX)
- 10-bit resolution upgrade path (vs ADC081S051CISDX/NOPB)
- Industry-standard SAR architecture (vs ADC081S021CISD)
Notes de conception
Place a 0.1uF decoupling capacitor as close as possible to the VDD pin (pin 2) with a short ground return to pin 3. For noisy rails, add a 10uF bulk capacitor in parallel. Keep analog input traces short and avoid routing them parallel to the SPI clock line (SCLK, pin 5) to prevent digital switching noise coupling into the sampled signal. The exposed pad (EP) on the 6-WSON package should be soldered to a ground copper pour for thermal dissipation and electrical reference.
The ADC101S051CISDX requires 16 SCLK cycles per conversion frame; do not terminate the SPI transaction early or the LSBs will be lost. The CS pin must idle high between conversions. Avoid leaving the analog input floating - tie to mid-supply or through a defined source impedance (<=2 kohm for full bandwidth at 500 kSPS). When reading the result, the data is clocked out MSB-first during the active SCLK phase, and the host MCU must sample on the correct clock edge as configured in SPI control register.
Estimated: With input source impedance of 1 kohm and acquisition time of ~300 ns, the ADC input settles to within 10 mV (about 1 LSB at 5V full-scale) before conversion. To preserve 10-bit accuracy, the analog source impedance should not exceed 1 kohm; for 5 kohm source impedance, throughput must be derated to ~200 kSPS to allow full settling. Use a low-impedance buffer (e.g., op-amp follower) if the sensor output impedance is higher than recommended.
At 500 kSPS continuous conversion with 5.25V supply, the ADC101S051CISDX dissipates approximately 9.7 mW - negligible self-heating. However, in tightly sealed industrial enclosures with elevated ambient temperatures (>70C), verify that the combined dissipation from the ADC and surrounding components does not push the PCB above the ADC's 85C upper limit. The 6-WSON EP provides a thermal pad for heat spreading; connect it to ground with multiple thermal vias for best thermal performance.
Informations de conformité
RoHS and lead-free per TI ADC101S051 product page. Industrial -40C to +85C temperature range only; not AEC-Q100 qualified for automotive. Halogen-free status not explicitly stated in retrieved data.
