MCP3561T-E/ST - 24-Bit 153.6kSPS ADC | Microchip Technology
MPN: MCP3561T-E/ST ✓ ActiveMCP3561T-E/ST Overview
An ADC is an interface IC that converts an analog voltage into a digital code for processing by a microcontroller, DSP, or other digital controller. The MCP3561 belongs to the delta-sigma ADC hierarchy, where an internal modulator and digital filter shape the conversion process. Delta-sigma ADCs are especially useful when high resolution, low noise, and relatively narrow-bandwidth measurements matter more than very high conversion rates. This family also supports programmable data rates, allowing designers to balance throughput, filtering, and signal-to-noise performance.
The MCP3561T-E/ST provides 24-bit resolution and operation at up to 153.6 kSPS. Its input architecture accepts two single-ended channels or one differential channel, giving designers flexibility for grounded sensors, resistive bridges, and other front ends. The low-noise characterization makes the converter appropriate for measurements where small input changes must remain distinguishable after digitization. Microchip identifies the MCP3561R as a preferred pin-compatible option for new designs because it adds an onboard voltage reference.
Internally, the MCP3561 uses a delta-sigma conversion architecture and digital filtering to reduce noise. The conversion data rate is programmable, so an application can operate faster when response time is important or more slowly when narrow effective bandwidth and improved noise behavior are preferred. A digital interface transfers conversion results to the host processor. Exact interface timing, filter settings, input impedance, reference requirements, and electrical limits should be confirmed against the manufacturer datasheet before final signal-chain design.
Typical uses include precision pressure and temperature acquisition, low-level process-control instrumentation, laboratory measurement equipment, and industrial sensor interfaces. A differential input is particularly useful when the measured signal includes a common-mode component or when a bridge-style sensor generates a small difference between two nodes. Single-ended operation can simplify systems with a common reference and one sensor output. The converter should be paired with suitable input protection, filtering, reference circuitry, and a grounded analog layout.
When laying out the PCB, keep analog input and reference connections short, place filtering capacitors close to the relevant pins, and maintain a quiet ground path beneath the converter. Avoid routing high-current switching paths beneath the analog section. Confirm the supply voltage, allowable input range, decoupling requirements, and digital interface levels in the manufacturer datasheet, particularly when the source impedance or acquisition interval differs from the application circuit.
This page consolidates the manufacturer product information, verified distributor identification, package details, selection guidance, and design-oriented explanations for engineers evaluating the MCP3561T-E/ST. It also identifies the manufacturer-preferred MCP3561R pin-compatible option for new designs where an onboard voltage reference is useful.
Drop-in alternatives for MCP3561T-E/ST — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MCP3561T-E/ST (same form factor and footprint) — differing in Input Configuration, Internal Voltage Reference, RoHS Status.
MCP3561R
✅ Drop-In📋 Reference alternative (not in catalog)
MCP3562-E/ST
✅ Drop-InContact for price
View Datasheet →MCP3561T-E/ST Maximum Ratings & Electrical Characteristics
| ADC Type | Delta-sigma ADC |
| Resolution | 24 bit |
| Maximum Sample Rate | 153.6 kSPS |
| Input Configuration | 2 single-ended inputs or 1 differential input |
| Onboard Voltage Reference | No |
| Programmable Data Rate | Up to 153.6 kSPS |
| Package | 20-pin TSSOP |
| Mounting Type | Surface mount |
| RoHS Status | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
MCP3561T-E/ST 20-pin tssop Pin Configuration Guide
Pin configuration for MCP3561T-E/ST (20-pin tssop package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MCP3561T-E/ST.
Refer to the datasheet for full pin configuration.
Typical Applications
MCP3561T-E/ST is suitable for 6 applications: Precision Pressure Sensor Interface, Industrial Temperature Measurement, Laboratory Signal Acquisition, Battery-Powered Sensor Node, Process Control Monitoring, Digital Audio and Vibration Analysis.
Precision Pressure Sensor Interface
The MCP3561T-E/ST is appropriate for a bridge-based pressure sensor when the useful signal is the small differential voltage between two sensor nodes. Its 24-bit delta-sigma conversion and selectable differential input let the front end reject common-mode excitation variation while preserving fine voltage resolution. The maximum 153.6 kSPS rate supports faster acquisition than a slow-resolution sensor interface, while programmable output rates can be reduced when lower noise and greater measurement stability are priorities. Place the bridge excitation return close to the analog ground structure, use a low-noise reference arrangement, and include input filtering that matches the required bandwidth rather than indiscriminately slowing the acquisition system.
Recommended
Industrial Temperature Measurement
The MCP3561T-E/ST can digitize low-level temperature sensor outputs when the application requires more precision than the sensor's inherent noise and the system needs flexible single-ended or differential connection. Its 24-bit resolution preserves small changes across a limited sensor range, and the delta-sigma architecture supports filtered acquisition of relatively slow thermal signals. Two single-ended inputs can monitor two temperature channels against a common reference, while differential mode can support appropriately biased sensors. The designer should confirm the sensor transfer function, allowable input range, excitation method, conversion timing, and calibration procedure in the manufacturer documentation before finalizing the analog front end.
Recommended
Laboratory Signal Acquisition
The MCP3561T-E/ST fits laboratory instruments that must resolve small analog changes but operate primarily within a narrow measurement bandwidth. Its 24-bit delta-sigma architecture combines digital filtering with a maximum 153.6 kSPS output rate, allowing the host to choose between throughput and noise performance. Differential input is useful for instrumentation outputs that include a common-mode offset, while single-ended mode simplifies sensors referenced to analog ground. For a practical implementation, use an external precision reference when the MCP3561T-E/ST is retained, provide the required supply bypass capacitors, and isolate the input network from digital clocks and switching nodes to preserve measurement integrity.
Recommended
Battery-Powered Sensor Node
The MCP3561T-E/ST can serve as the measurement front end in a compact battery-powered sensor node when the monitored signal changes slowly enough for a delta-sigma converter. The selectable input configuration allows a node to support either one differential transducer or two grounded single-ended sensors. Programmable data rates make it possible to balance acquisition latency against noise averaging, which can help a system avoid waking the host for every conversion. The power budget should be calculated from the converter's operating current and the selected rate, while low-leakage switches, an efficient reference arrangement, and controlled use of the converter help preserve battery life. The sensor excitation and digital section should be powered only when a measurement is required.
Recommended
Process Control Monitoring
The MCP3561T-E/ST is suitable for process-monitoring loops where a controller must capture a slowly changing process variable with high resolution. A 24-bit ADC can retain meaningful detail in small transducer outputs, and the two-single-ended-or-one-differential arrangement supports both shared-reference channels and differential sensing. The maximum 153.6 kSPS rate is more than adequate for many thermal, level, and pressure loops, while lower programmable rates can narrow the effective bandwidth. Design the input stage for the transducer's source impedance, add protection for industrial transients, and maintain isolation between measurement ground and high-current actuator returns so switching activity does not obscure the measured signal.
Recommended
Digital Audio and Vibration Analysis
The MCP3561T-E/ST can be considered for low-bandwidth audio-control monitoring or vibration measurement when the design requires a high-resolution conversion result rather than a full audio-bandwidth waveform. Its delta-sigma filter and programmable rate provide flexibility for resolving low-level envelopes or slow spectral components, while the 24-bit code width preserves small variations. Differential input can support appropriately biased sensor outputs and reduce common-mode pickup. The application bandwidth, anti-alias requirement, and filter latency must be evaluated carefully because the converter is not intended to substitute for a high-rate audio ADC when waveform fidelity across the full audible spectrum is required.
Recommended
Recommended Products Summary
Engineering reference data for MCP3561T-E/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCP3561R | MCP3562-E/ST |
|---|---|---|---|
| Package | TSSOP-20 | TSSOP-20 | TSSOP-20 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| ADC Resolution | 24 bit | 24 bit | 24 bit |
| Maximum Sample Rate | 153.6 kSPS | 153.6 kSPS | 153.6 kSPS |
| Input Configuration | 2 single-ended or 1 differential input | 2 single-ended or 1 differential input | 1 differential input |
| ADC Architecture | Delta-sigma | Delta-sigma | Delta-sigma |
Key Differentiators
- Manufacturer-preferred choice for new MCP3561 designs (vs MCP3561R)
- Supports two single-ended channels in addition to differential operation (vs MCP3562-E/ST)
- Combines high resolution with programmable throughput (vs MCP3562-E/ST)
Design Notes
Treat the analog input path as a precision signal chain. Keep input traces short, place RC filters close to the corresponding ADC pins, and avoid routing them beneath digital clocks or high-current switching paths. Follow the manufacturer layout guidance for the 20-pin TSSOP footprint and place the specified bypass capacitors directly at the supply pins. A quiet analog return path is especially important when two single-ended channels or a low-level differential sensor are used.
Design the reference network as part of the converter rather than as an afterthought. MCP3561T-E/ST does not include the onboard reference offered by MCP3561R, so verify the required external reference voltage, source impedance, stability, and startup sequence in the manufacturer datasheet. Keep the reference route away from digital return currents and place reference bypass components at the appropriate device pins. Any calculated reference error should be included in the end-to-end measurement uncertainty.
Do not select the maximum 153.6 kSPS data rate solely from the headline sample-rate figure. Output data rate, filter bandwidth, acquisition time, latency, and input settling are related but distinct constraints. Check the datasheet tables for the selected oversampling and decimation settings, especially with high-impedance sources. In single-ended mode, verify which channels are available and how common-mode range and channel switching affect the selected measurement sequence.
Choose input filtering from the required analog bandwidth and source impedance rather than adding capacitance directly to the ADC pins. Excess capacitance can alter settling behavior and consume acquisition headroom. For differential sensors, maintain symmetrical routing where practical, locate common-mode or differential protection close to the connector, and confirm that clamp components do not distort the signal during normal operation. Validate settling and noise with the final reference and sensor arrangement.
Compliance Information
The manufacturer product page confirms the MCP3561 family and recommends the pin-compatible MCP3561R for new designs. Explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations require confirmation from the current manufacturer product documentation or declaration.