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MCP3911A0-E/SS

Dual-ch 24-bit energy metering AFE, 125kSPS, PGA 1-32x, 94.5dB SINAD, 1.2V ref, SSOP-20

2920

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MCP3911A0-E/SS

الحزمة ： الحزمة

SSOP-20 (208mil body, 7.2 x 5.3mm)

الوصف

نظرة عامة على المنتج

The MCP3911A0-E/SS is a 3.3V dual-channel energy metering analog front end (AFE) from Microchip, featuring two simultaneous-sampling 24-bit delta-sigma ADCs with programmable gain amplifiers (PGA). With 94.5dB SINAD and -106.5dBc THD, it meets IEC 62053-22 Class 0.1S metering standards. The device includes a low-drift 1.2V internal reference, phase delay compensation, and a 20MHz SPI interface in a 20-lead SSOP package.

المواصفات الرئيسية

ADC Resolution	16/24-bit (configurable)
القنوات	2 (simultaneous sampling)
Sample Rate	Up to 125 kSPS per channel
PGA Gain	1x to 32x (per channel)
SINAD	94.5 dB (typical)
THD	-106.5 dBc (up to 35th harmonic)
SFDR	111 dB (typical)
SNR	95 dB (typical)
Internal Reference	1.2V, 7 ppm/°C drift
جهد الإمداد	2.7 فولت إلى 3.6 فولت
الطاقة	8.9 mW typical @ 3.3V
الواجهة	SPI, up to 20MHz
الحزمة	SSOP-20 (208mil)
درجة حرارة التشغيل	-40 درجة مئوية إلى +125 درجة مئوية
المؤهلات	AEC-Q100 Grade 1

الميزات

Two simultaneous-sampling 24-bit delta-sigma ADCs
Independent PGAs with gains from 1x to 32x per channel
94.5dB SINAD and 111dB SFDR for high-accuracy metering
Low-drift internal 1.2V reference (7 ppm/°C)
Phase delay compensation with 1µs resolution
Per-channel 24-bit digital offset and gain calibration
Separate modulator output pins for each channel
Independent data ready pin for synchronization
Continuous read/write modes for efficient SPI communication
Ultra-low power shutdown mode (<2µA)

التطبيقات

Single-phase and poly-phase energy meters (IEC/ANSI compliant)
Power monitoring and measurement systems
Industrial power quality analyzers
Electric vehicle charging stations
Smart grid and demand response systems
Server and data center power monitoring

مقدمة المنتج:MCP3911A0-E/SS مقدمة المنتج

The MCP3911A0-E/SS is a 3.3V dual-channel analog front end (AFE) from Microchip Technology, designed for high-precision energy metering and power monitoring applications. It contains two simultaneous-sampling 24-bit delta-sigma ADCs with independent programmable gain amplifiers (PGA, 1x to 32x) on each channel. With 94.5dB SINAD, -106.5dBc THD, and 111dB SFDR, it meets the accuracy requirements of IEC 62053-22 Class 0.1S and ANSI C12.20 standards. The device integrates a low-drift 1.2V internal voltage reference (7 ppm/°C), phase delay compensation with 1µs resolution, per-channel offset and gain calibration registers, and a high-speed 20MHz SPI interface. The AEC-Q100 Grade 1 qualification enables automotive power monitoring applications.

مبدأ العمل:MCP3911A0-E/SS مبدأ العمل

The MCP3911 contains two independent delta-sigma ADC channels, each with a PGA front-end, third-order modulator, and decimation filter. The PGA amplifies small shunt voltage signals before the modulator, with gains programmable from 1x to 32x. Each modulator oversamples the input at rates up to 4MHz, producing a high-speed bit stream that the digital decimation filter converts to 24-bit output data. The OSR (oversampling ratio) is programmable from 32 to 4096, trading resolution for data rate. Phase delay compensation aligns the voltage and current channel data with 1µs resolution, critical for accurate power measurement with reactive loads. Per-channel calibration registers correct for system-level offset and gain errors. The SPI interface supports continuous read mode, allowing the host MCU to read both channels’ data in a single DMA transfer.

وصف الدبوس:MCP3911A0-E/SS تعريف الدبوس ووظائفه

دبوس	الاسم	الوصف
1	VSS	أرضي
2	CH0+	Channel 0 positive input (current)
3	CH0-	Channel 0 negative input (current)
4	AVDDD	Analog supply (2.7-3.6V)
5	CH1+	Channel 1 positive input (voltage)
6	CH1-	Channel 1 negative input (voltage)
7	VREF+	Positive reference input (or internal ref out)
8	VREF-	Negative reference input
9	CLKIN	Clock input / crystal connection
10	CLKOUT	Clock output / crystal connection
11	OSCH	Oscillator high-speed mode select
12	دي في دي دي دي	Digital supply (2.7-3.6V)
13-16	MCLK,MDAT0,MDAT1,DR	Modulator outputs and data ready
17	CS	SPI chip select
18	SCK	SPI clock
19	SDI	SPI data input
20	SDO	SPI data output

Application Scenarios:In which products and applications isMCP3911A0-E/SS مستعمل

Single-Phase Energy Meter: Connect a current shunt to CH0 (with PGA gain of 32x for mV-level signals) and a voltage divider to CH1 (gain 1x). The 94.5dB SINAD provides 0.1% accuracy across a 1000:1 dynamic range, meeting IEC 62053-22 Class 0.1S. Phase delay compensation aligns the channels for accurate real and reactive power measurement.
EV Charging Station: Monitor charging current and voltage simultaneously. The simultaneous sampling ensures that current and voltage measurements are time-aligned for accurate power calculation. Use the AEC-Q100 qualified version for automotive-grade reliability. The 125kSPS data rate captures fast transients during connection and disconnection events.
Server Power Monitoring: Measure server rack power consumption in real-time. Connect current transformers to CH0 and line voltage dividers to CH1. The per-channel calibration registers compensate for sensor offset and gain errors. Continuous SPI read mode streams power data to the BMC via DMA with minimal CPU overhead.

Alternative Models:What chips are recommended as replacements for MCP3911A0-E/SS

الطراز	القنوات	Resolution	SINAD	الفرق الرئيسي
MCP3912	3	24-bit	93.5dB	Three channels, for 3-phase
MCP3901	2	24-bit	88dB	Predecessor, lower performance
AFE5404	4	24-bit	86dB	TI, 4-channel for 3-phase+neutral
RN8209C	2	24-bit	90dB	Renergy, single-phase metering
ADE7953	2	24-bit	80dB	ADI, integrated metrology engine