MCP3561-E/ST - 24-Bit 153.6kSPS ADC | Microchip
MPN： MCP3561-E/ST ✓ 啟用中MCP3561-E/ST 概覽
A delta-sigma ADC is a type of analog-to-digital converter that uses a sigma-delta modulator and digital decimation filtering to convert an analog input into a high-resolution digital result. The MCP3561 belongs to the ADC/DAC category within the broader semiconductor and signal-conversion hierarchy, making it suitable for precision measurement systems where moderate conversion speed and high resolution are more important than very high sample rates.
The principal features established by the verified manufacturer and distributor data are 24-bit resolution, a maximum output rate of 153.6 kSPS, programmable conversion timing, single-ended or differential input capability, and operation from a 3 V supply. The single-ended architecture allows two inputs to be selected, while differential operation supports a one-channel arrangement for rejecting common-mode noise when the source can provide a complementary signal.
The MCP3561 uses delta-sigma conversion to balance fine resolution with integrated digital filtering. Its maximum 153.6 kSPS rate makes it faster than many conventional low-resolution sigma-delta converters while retaining a 24-bit output format. However, the exact input bandwidth, effective noise performance, conversion-time table, common-mode range, and acquisition timing must be confirmed in the manufacturer datasheet before final analog-front-end and sampling-system design.
Typical applications include precision process-control instrumentation, industrial sensor acquisition, portable measurement equipment, low-frequency data acquisition, and embedded measurement systems. The MCP3561R family is especially relevant because the manufacturer identifies MCP3561R as pin compatible and recommends it for new designs when its integrated voltage reference is acceptable.
Designers should use the manufacturer's specified analog input network, reference arrangement, bypass-capacitor values, grounding method, and digital-interface timing. Because the MCP3561 does not include the onboard reference offered by MCP3561R, an external reference implementation must account for reference noise, drift, input impedance, and adequate decoupling.
This page consolidates verified manufacturer positioning, distributor availability, package information, and conversion specifications with practical replacement guidance. It also distinguishes the confirmed pin-compatible MCP3561R from unverified alternatives so engineers can make an evidence-based decision without treating a similar ADC as a guaranteed drop-in replacement.
直接替換替代品，適用於 MCP3561-E/ST — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
MCP3561R-E/ST
✅ 直接替換📋 參考替代品（不在目錄中）
MCP3561-E/ST 最大額定值與電氣特性
| 無規格資料 |
MCP3561-E/ST standard 腳位配置指南
MCP3561-E/ST（standard 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MCP3561-E/ST.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP3561-E/ST 適用於 6 應用s: Industrial Process Measurement, Portable Sensor Acquisition, Precision Data Acquisition, Environmental Monitoring, Laboratory Instrumentation, Audio and Low-Level Signal Measurement.
Industrial Process Measurement
The MCP3561-E/ST fits industrial process measurement when a sensor output requires more resolution than a conventional low-resolution converter but does not require very high sampling speed. Its 24-bit conversion format and programmable data rate up to 153.6 kSPS support precision acquisition from pressure, temperature, level, and flow sensing systems. The two single-ended inputs can also be used for selected differential operation when the sensor or front end supplies a complementary signal. Because the MCP3561 uses an external voltage reference, the system must include a stable reference source and suitable decoupling. Engineers should also verify the official input range, common-mode limits, acquisition time, and digital filter behavior before setting the gain, bandwidth, and sampling rate.
推薦
Portable Sensor Acquisition
The MCP3561-E/ST can support compact, battery-powered sensor-acquisition instruments where numerical resolution is valuable but rapid waveform sampling is unnecessary. A 24-bit ADC can preserve small signal variations in strain, temperature, gas, and biopotential front ends, while the adjustable rate up to 153.6 kSPS lets the firmware trade conversion speed for lower processing load and potentially lower system power. The 20-pin TSSOP package also supports surface-mount assembly in space-constrained products. The design must still account for the external reference, analog-front-end power, input leakage, filtering, and common-mode range. A low-power system should also confirm the converter's operating current and the shutdown behavior from the manufacturer datasheet.
推薦
Precision Data Acquisition
The MCP3561-E/ST is appropriate for precision data-acquisition cards that repeatedly measure slowly changing or moderate-bandwidth analog signals. Its 24-bit output supports detailed numerical representation, while the programmable data rate up to 153.6 kSPS provides flexibility for matching each channel to the required bandwidth. Two single-ended inputs allow the board to measure two sources, or the ADC can operate differentially when common-mode rejection is important. The critical external considerations are reference stability, analog filtering, input settling, digital-interface timing, and calibration strategy. Because the MCP3561 omits the onboard reference, the converter's external reference network becomes an essential part of the measurement chain and should follow the manufacturer's recommended layout and bypass strategy.
推薦
Environmental Monitoring
The MCP3561-E/ST can be used in environmental monitoring equipment for high-resolution readings from humidity, temperature, gas, and air-quality sensors. Its 24-bit resolution is useful when the sensor output is small and the system needs to preserve calibration detail, while the maximum 153.6 kSPS rate permits synchronized acquisition of multiple relatively slow channels. Differential operation can improve rejection of common-mode noise in long sensor cables, but only if the sensor front end can provide the required complementary signal. Design work should include input protection, settling time, reference quality, digital averaging, and sensor-specific filtering. The exact operating-temperature range and environmental qualifications are not present in the supplied data and must be verified before field deployment.
推薦
Laboratory Instrumentation
The MCP3561-E/ST can serve as the conversion element in laboratory instruments that measure low-level analog signals with moderate bandwidth, including programmable sources, bench meters, and condition-monitoring equipment. The 24-bit resolution provides headroom for calibration and gain correction, while the adjustable data rate up to 153.6 kSPS allows a single converter family to cover multiple measurement modes. The analog front end should provide low-noise amplification, adequate input impedance, and bandwidth matched to the selected digital-filter rate. For traceable measurements, engineers must characterize the external reference, offset, gain, INL, noise, and drift rather than relying on nominal resolution alone. The MCP3561R may simplify new designs through its onboard reference, but its reference characteristics should be checked against the measurement requirement.
推薦
Audio and Low-Level Signal Measurement
The MCP3561-E/ST is suitable for low-level audio measurement and control systems where signal amplitude resolution matters more than maximum sample rate. A 24-bit converter can capture small control, monitoring, or instrumentation signals, and the two single-ended inputs permit comparison of two channels. Differential operation can reduce common-mode pickup when the source supports it, although the input bandwidth and digital-filter delay must align with the audio bandwidth being measured. The external reference should have sufficiently low noise for the target signal-to-noise ratio, and analog anti-alias filtering remains necessary. This use is not a claim that the converter is a dedicated audio ADC; the design must verify its actual noise density, effective bandwidth, linearity, and clock requirements in the manufacturer datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 MCP3561-E/ST — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MCP3561R-E/ST |
|---|---|---|
| Package | 20-pin TSSOP | 20-pin TSSOP |
| Brand | Microchip Technology | Microchip Technology |
| Resolution | 24 bit | 24 bit |
| Maximum Data Rate | 153.6 kSPS | 153.6 kSPS |
| ADC Architecture | Delta-sigma | Delta-sigma |
| Input Configuration | Two single-ended inputs or one differential input | Two single-ended inputs or one differential input |
| Supply Voltage | 3 V | 3 V |
| Onboard Voltage Reference | No | Yes |
| Manufacturer Recommendation | Existing MCP3561 option | Preferred pin-compatible option for new designs |
主要差異化特點
- Manufacturer-designated pin-compatible upgrade path (對比MCP3561R-E/ST)
- External-reference architecture supports external precision design (對比MCP3561R-E/ST)
- High-resolution conversion at a moderate programmable rate (對比MCP3561R-E/ST)
設計說明
The MCP3561 requires an external voltage reference, while MCP3561R includes one onboard. Treat the reference as part of the analog signal chain: verify its accuracy, temperature drift, noise, startup behavior, and load regulation against the ADC resolution. Place the reference and its recommended bypass components close to the device, keep the reference return path separate from noisy digital return currents, and follow the manufacturer's reference-network schematic before substituting values.
Use a compact, symmetric analog layout around the 20-pin TSSOP. Place input and reference bypass capacitors near their associated pins with short ground returns, route the analog input away from digital clock and interface traces, and provide a continuous ground reference beneath and around the converter. The supplied data does not include the complete pin map, so engineers must follow the official MCP3561 datasheet for pin-specific grounding, exposed connections, and test-point access.
Choose the analog input bandwidth and digital data rate together rather than assuming the 153.6 kSPS maximum applies to every signal. Verify acquisition time, input settling, effective noise bandwidth, and digital-filter latency in the manufacturer datasheet. Source impedance must remain low enough for the specified settling behavior, and an anti-alias filter should precede the ADC. Differential operation should be used only when the source can provide a complementary signal and the common-mode limits are satisfied.
Do not assume that MCP3561R can be soldered into an MCP3561 board without checking the reference circuitry. The R version adds an onboard reference, which can change the required decoupling, external connections, startup behavior, and potentially the board's analog input scaling. Also do not substitute a converter merely because it is advertised as 24-bit; verify the 20-pin TSSOP footprint, pinout, supply level, reference voltage, input range, interface protocol, conversion timing, and acquisition behavior.
合規資訊
The supplied verified snippets do not contain specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Compliance must be confirmed from current Microchip product documentation.
