MCP3461R-E/ST - 16-Bit 153.6kSPS ADC | Microchip
Référence : MCP3461R-E/ST ✓ ActifMCP3461R-E/ST Présentation
A delta-sigma ADC is a category of data-converter IC that uses continuous-time oversampling and digital filtering to obtain high resolution and excellent noise performance. Its role within the broader semiconductor hierarchy is analog-to-digital converter, data-acquisition IC, signal-chain component, and ultimately electronic measurement interface. The MCP3461R-E/ST is designed to digitize low-frequency analog signals where fine resolution, stable conversion performance, and low circuit complexity are more important than very high sample rates.
Key device characteristics include 16-bit resolution, an output data rate of up to 153.6 kSPS, one differential input or two single-ended inputs, an SPI interface, an internal voltage reference, an internal oscillator, a programmable gain amplifier, and an integrated temperature sensor. Typical signal-to-noise ratio is 97.3 dB, while typical integral nonlinearity is 7 ppm. The converter also supports clock frequencies from 1 MHz to 20 MHz or from 3.3 MHz to 6.6 MHz, depending on the operating mode.
The delta-sigma conversion architecture filters noise through oversampling and digital decimation, making the device appropriate for pressure, temperature, level, load-cell, and laboratory measurement signals. Its internal reference and oscillator reduce external component count, while the 20-pin TSSOP package simplifies routing in compact data-acquisition boards. The SPI interface supports deterministic communication with a host microcontroller or digital controller.
Typical uses include industrial process monitoring, precision temperature measurement, pressure transducers, portable instrumentation, low-frequency sensor acquisition, and embedded data loggers. For applications requiring more independent analog inputs, related four-channel and dual-channel members of the MCP346x family can provide additional channel capacity, but software configuration, pin allocation, and acquisition sequencing must be checked before substitution.
When designing a board around the MCP3461R-E/ST, place the input, reference, and decoupling networks close to the device and keep sensitive analog traces short and separated from digital switching paths. Select the clock and decimation settings so that the resulting output-data rate meets the signal bandwidth without sacrificing the required noise performance. Account for the 2.7 V minimum analog supply when designing the sensor interface and reference headroom.
This product page combines the manufacturer specifications with application guidance, parameter comparisons, and clearly qualified drop-in options. It helps engineers evaluate channel count, reference configuration, temperature range, package compatibility, interface behavior, and power-supply requirements before committing the MCP3461R-E/ST to a production design.
Alternatives de remplacement direct pour MCP3461R-E/ST — 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 MCP3461R-E/ST (même facteur de forme et même empreinte) — différant par Package, Converter Type, Operating Temperature Range, RoHS Status, Burnout Sensor Detection.
MCP3461T-E/ST
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →MCP3461RT-E/ST
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3462-E/ST
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MCP3462R-E/ST
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MCP3464-E/ST
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MCP3464T-E/ST
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MCP3461R-E/ST Valeurs maximales et caractéristiques électriques
| Converter Type | 16-bit delta-sigma ADC |
| Résolution | 16 bit |
| Maximum Sample Rate | 153.6 kSPS |
| Input Configuration | 2 single-ended or 1 differential input |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.7 V |
| Internal Clock Frequency | 1 MHz to 20 MHz |
| Oscillator Frequency | 3.3 MHz to 6.6 MHz |
| Signal-to-Noise Ratio | 97.3 dB typical |
| Integral Nonlinearity | 7 ppm typical |
| Input Resolution | 2 LSB |
| Courant d'alimentation | 810 uA typical |
| Interface | SPI |
| Reference | Internal voltage reference |
| Oscillator | Internal oscillator |
| Integrated Features | Programmable gain amplifier and temperature sensor |
| Température de fonctionnement | -40 C to +125 C |
| Boîtier | 20-pin TSSOP |
| Type de montage | Surface mount |
| Statut RoHS | Compliant |
Guide de configuration des broches du MCP3461R-E/ST 20-pin tssop
Configuration des broches du MCP3461R-E/ST (boîtier 20-pin tssop). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour MCP3461R-E/ST.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MCP3461R-E/ST convient pour 6 applications: Industrial Process Pressure Measurement, Precision Temperature Acquisition, Load Cell and Strain Gauge Instrumentation, Portable Environmental Monitoring, Laboratory and Instrumentation Front Ends, Embedded Data Logging.
Industrial Process Pressure Measurement
The MCP3461R-E/ST fits low-frequency pressure transmitter and process-sensing systems that prioritize 16-bit resolution over rapid sampling. Its one differential input can accept a bridge or differential sensor output, while the programmable gain amplifier supports conditioning of small signals. At up to 153.6 kSPS, the converter provides ample conversion speed for pressure, level, and flow signals. The internal voltage reference, 97.3 dB typical signal-to-noise ratio, and 7 ppm typical integral nonlinearity help establish a stable measurement chain. Place the ADC close to the sensor connector and keep the analog path short to minimize pickup before the delta-sigma filtering stage.
Precision Temperature Acquisition
The MCP3461R-E/ST is appropriate for resistance, thermocouple, or semiconductor temperature measurement when a 16-bit delta-sigma conversion provides useful resolution. Its programmable gain amplifier can accommodate small sensor signals, and the differential input arrangement helps reject common-mode noise in industrial wiring. The converter supports two single-ended channels when paired sensors do not require differential pairing. With an internal reference and a maximum data rate of 153.6 kSPS, the device supports both slow precision sampling and faster monitoring. Its integrated temperature sensor provides a useful local diagnostic function, while the 20-pin TSSOP package keeps the analog and digital circuitry compact.
Load Cell and Strain Gauge Instrumentation
The MCP3461R-E/ST can digitize low-level differential outputs from bridge-based load cells and strain gauges. A single differential input reduces sensitivity to shared ground disturbances, while the programmable gain amplifier increases the usable span of the sensor output without requiring immediate digitization. The 16-bit resolution and 7 ppm typical integral nonlinearity support precision measurements, and the 153.6 kSPS maximum rate accommodates dynamic testing when the selected decimation setting is suitable. The internal reference supports a compact instrument, although excitation, input protection, and analog filtering must still be implemented around the converter for a production measurement chain.
Portable Environmental Monitoring
The MCP3461R-E/ST supports compact environmental-monitoring instruments that measure slow-moving temperature, humidity, gas, or level signals. Two single-ended inputs allow two sensor channels to be multiplexed, and the 16-bit converter can resolve small analog changes without the footprint of a higher-channel-count ADC. A typical supply current of 810 uA is useful for battery-operated equipment, while the 2.7 V to 3.6 V analog range simplifies low-voltage sensor conditioning. The internal reference and oscillator reduce board complexity. For a portable data logger, configure the data rate and digital filter to match the sensor bandwidth and use the SPI interface to transfer blocks of results efficiently.
Laboratory and Instrumentation Front Ends
The MCP3461R-E/ST is well suited to laboratory measurement front ends requiring more resolution than a conventional 12-bit converter without the complexity of a very high-speed ADC. The 153.6 kSPS maximum rate covers many audio-range, control, and sensor-bandwidth applications, while the programmable gain amplifier supports a broad range of input levels. Typical signal-to-noise ratio of 97.3 dB and integral nonlinearity of 7 ppm are important for calibration and repeatability. Use a shielded analog front end and dedicated analog and digital supply decoupling to prevent laboratory bench noise or switching supplies from dominating the measured signal.
Embedded Data Logging
The MCP3461R-E/ST can serve as the acquisition element in an embedded data logger for slowly changing industrial or environmental variables. The host controller can configure the SPI interface, channel selection, gain, clock, and decimation settings to balance throughput with conversion noise. Two single-ended inputs provide basic multiplexing, while the internal reference and oscillator reduce external support circuitry. A 16-bit result format preserves precision through storage and processing, and the -40 C to +125 C temperature range supports demanding industrial environments. Choose a data rate appropriate for the slowest useful measurement, then apply digital averaging only after confirming that the analog front end and sensor bandwidth can support the resulting update interval.
Données de référence d'ingénierie pour MCP3461R-E/ST — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MCP3461T-E/ST | MCP3461RT-E/ST | MCP3462-E/ST | MCP3462R-E/ST | MCP3464-E/ST |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin TSSOP | 20-pin TSSOP - same | 20-pin TSSOP - same | 20-pin TSSOP - same | 20-pin TSSOP - same | 20-pin TSSOP - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Maximum Sample Rate | 153.6 kSPS | 153.6 kSPS | 153.6 kSPS | 153.6 kSPS | 153.6 kSPS | 153.6 kSPS |
| Input Configuration | 2 single-ended or 1 differential | 2 single-ended or 1 differential | 2 single-ended or 1 differential | Dual-channel configuration | 2 differential inputs | 4 differential inputs |
| Analog Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.7 V | 1.8 V to 3.7 V | 1.8 V to 3.7 V | 1.8 V to 3.7 V | 1.8 V to 3.7 V | 1.8 V to 3.7 V |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| Signal-to-Noise Ratio | 97.3 dB typical | 97.3 dB typical | 97.3 dB typical | 97.3 dB typical | 97.3 dB typical | 97.3 dB typical |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
| Internal Reference | Yes | Suffix-dependent | Yes | No | Yes | No |
Principaux différenciateurs
- Combines an onboard reference with a compact single differential-input converter configuration (vs MCP3462-E/ST)
- Maintains identical headline resolution and conversion speed while reducing channel count (vs MCP3464R-E/ST)
- Supports two single-ended measurements in the same TSSOP family (vs MCP3461T-E/ST)
Notes de conception
Route the analog input directly to the converter with a short, guarded trace and place the input filtering components near the sensor or connector. Keep the SPI clock, data lines, and digital return currents away from the differential input pair. A continuous ground plane and carefully controlled return paths help prevent switching activity from adding noise before the delta-sigma filter can reject it.
Provide local decoupling for both the 2.7 V to 3.6 V analog rail and the 1.8 V to 3.7 V digital rail, with each capacitor placed close to the corresponding package pins. Keep the analog and digital supply paths separate until they meet at a controlled ground reference. Verify startup sequencing, rail tolerances, and the voltage at every analog input under the worst-case supply condition.
Do not select the maximum 153.6 kSPS output rate unless the selected clock, decimation, gain, and filter settings provide the required noise performance. Higher conversion rates generally consume more energy and may require faster settling. Review the manufacturer timing and digital-filter tables, then choose the lowest output rate that satisfies the signal bandwidth and acquisition time.
Treat the SPI interface as a digital signal-integrity path even when the ADC input bandwidth is low. Use a controlled-impedance routing style where appropriate, avoid long stubs, and observe the manufacturer's digital transition and settling requirements. A separate analog ground and digital ground strategy should preserve a low-impedance return path without leaving the analog section vulnerable to excessive ground potential differences.
Informations de conformité
The component listing identifies the MCP3461R-E/ST as RoHS compliant. No separate REACH, halogen-free, lead-free, conflict-minerals, or AEC-Q100 qualification statement was established for this exact orderable MPN.