CS5463-ISZR - Single-Phase Bi-Directional Power/Energy IC | Cirrus Logic
MPN: CS5463-ISZR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.3 | $6.30 |
| 10 | $5.5 | $55.00 |
| 100 | $4.45 | $445.00 |
| 500 | $3.85 | $1,925.00 |
| 1,000 | $3.2 | $3,200.00 |
CS5463-ISZR Overview
A power/energy metering IC is a mixed-signal device that simultaneously samples voltage and current waveforms, computes instantaneous real power, accumulates energy, and outputs calibrated frequency pulses proportional to active energy. It belongs to the energy metering IC hypernym hierarchy: power/energy metering IC -> power monitoring IC -> PMIC -> mixed-signal IC -> integrated circuit. The CS5463-ISZR is a pin-compatible upgrade to Cirrus Logic's earlier CS5460A and CS5461A devices, retaining full backwards compatibility while adding line frequency, current/voltage sag detection, zero-cross detection, and three programmable pulse outputs.
Key features include 24-bit Delta-Sigma ADCs with on-chip digital calibration, an input impedance of 30 kOhm on the current channel, on-chip oscillator, real-time phase correction, instantaneous, average, and active-energy calculations, plus selectable positive-only accumulation mode. The energy-to-frequency converter drives three programmable pulse-output pins that allow direct interfacing with electromechanical counters or stepper registers.
The device integrates an SPI/Microwire three-wire serial interface that connects to a host microcontroller for calibration, configuration, and instantaneous energy readout. On-chip registers store measured values, calibration coefficients, and status flags, simplifying the host firmware. The internal digital signal path supports line-voltage and load-current sensing up to several hundred Hz.
Typical applications include residential single-phase electricity meters, smart-plug and power-strip energy monitors, industrial sub-metering, white-goods energy management, and PV inverter DC-side energy measurement. Designers can place the CS5463-ISZR directly on the analog front-end board and use its pulse outputs to drive an LED or stepper register.
When designing with this part, allocate adequate PCB area for the anti-aliasing RC network on each analog input - typical values are 1 kOhm plus 33 nF - and ensure the analog VA+ supply is decoupled with a 10 uF bulk plus 0.1 uF ceramic pair. Avoid routing digital return currents beneath the analog ground pour.
This page consolidates distributor pricing, drop-in alternatives, and practical design notes that are not aggregated on any single manufacturer or distributor site.
Drop-in alternatives for CS5463-ISZR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CS5463-ISZ
✅ Drop-In📋 Reference alternative (not in catalog)
CS5463K-ISZR
✅ Drop-In📋 Reference alternative (not in catalog)
CS5463-ISZR
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →CS5460A-ISZR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CS5461A-ISZR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CS5463-ISZR Maximum Ratings & Electrical Characteristics
| Function | Single-Phase Bi-Directional Power/Energy Measurement |
| ADCs | 2 x Delta-Sigma (24-bit) |
| Analog Supply Voltage (VA+) | 4.75 V to 5.25 V |
| Digital Supply Voltage (VD+) | 3.3 V to 5 V |
| Supply Current | 2.9 mA (typical) |
| Current Channel Input Impedance | 30 kOhm |
| Communication Interface | SPI / Microwire-compatible, 3-wire serial |
| Pulse Outputs | 3 programmable |
| On-chip Functions | Energy-to-frequency converter, line-frequency, sag detection, zero-cross detection, positive-only accumulation mode |
| On-chip Oscillator | Yes (external crystal option) |
| Package | 24-SSOP (0.209 inch / 5.30 mm body width) |
| Packaging | Tape & Reel (TR) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C |
| Pin-Compatible Predecessors | CS5460A, CS5461A |
CS5463-ISZR Pin Configuration
| Pin 1 | XIN — Crystal oscillator input |
| Pin 2 | XOUT — Crystal oscillator output |
| Pin 3 | VA+ — Analog positive supply |
| Pin 4 | VA- — Analog ground |
| Pin 5 | IIN+ — Current channel analog positive input |
| Pin 6 | IIN- — Current channel analog negative input |
| Pin 7 | VIN+ — Voltage channel analog positive input |
| Pin 8 | VIN- — Voltage channel analog negative input |
| Pin 9 | VREFIN — Voltage reference input |
| Pin 10 | VREFOUT — Voltage reference output |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | VD+ — Digital positive supply |
| Pin 14 | VD- — Digital ground |
| Pin 15 | SCLK — Serial clock input |
| Pin 16 | SDI — Serial data input |
| Pin 17 | SDO — Serial data output |
| Pin 18 | CS — Chip select input |
| Pin 19 | RESET — Reset input (active low) |
| Pin 20 | P1 — Programmable pulse output 1 |
| Pin 21 | P2 — Programmable pulse output 2 |
| Pin 22 | P3 — Programmable pulse output 3 |
| Pin 23 | INT — Interrupt output |
| Pin 24 | NC — Not connected (per datasheet) |
Typical Applications
CS5463-ISZR is suitable for 6 applications: Residential Single-Phase Electricity Meter, Smart Plug and Power Strip Energy Monitor, Industrial Submetering and Energy Management, White-Goods Energy Management, Solar PV DC-Side Energy Measurement, EV Charging Station Per-Pole Energy Measurement.
Residential Single-Phase Electricity Meter
The CS5463-ISZR is a primary measurement IC for IEC 62053-21 Class 1 and Class 2 residential single-phase electronic watt-hour meters. Its 24-bit Delta-Sigma ADCs and on-chip digital calibration yield 0.1 percent typical active-energy accuracy across the 50 Hz and 60 Hz line-frequency range, and the bi-directional energy accumulation handles both import and export measurement for net-metering solar PV installations. The three programmable pulse outputs drive a stepper-register or LCD stepper motor with selectable per-million-solder reliability. Designers place a shunt or current transformer on the load side, add the recommended anti-aliasing RC network on each analog input, and use the SPI/Microwire interface to a low-cost microcontroller for tariff and display control. Compare Microchip ATM90E36A-AU-R for next-generation ARM Cortex design.
Recommended
Smart Plug and Power Strip Energy Monitor
In smart-plug, smart-strip, and Wi-Fi-socket energy monitors, the CS5463-ISZR fits in a 24-SSOP that sits behind a small current transformer and resistive divider network, measuring load power below 16 A continuously. Its 2.9 mA typical supply current keeps total monitor power below 50 mW, well inside the standby limits of Energy Star smart-plug requirements, and the SPI/Microwire interface mates directly with an ESP32 or similar Wi-Fi MCU for cloud telemetry. The bi-directional accumulation also supports solar-plus-storage power strips that must measure both charging and inverter export. The three programmable pulse outputs allow LED blink-rate energy visualization, calibration check pulses, and tamper detection events all from the same IC.
Recommended
Industrial Submetering and Energy Management
For industrial submetering panels and building energy-management systems, the CS5463-ISZR provides a per-circuit measurement node that a controller aggregates via SPI/Microwire daisy-chain or RS-485 bus. The 30 kOhm current-channel input impedance combined with on-chip gain and offset calibration produces repeatable per-cent accuracy across an industrial -40 C to +85 C temperature range, and the on-chip zero-cross detection supports phase-control loads such as HVAC and industrial lighting. The 24-SSOP package fits inside a 1 inch square per-circuit PCB, and the bi-directional accumulation enables import-export measurement at solar-plus-grid prosumer installations.
Recommended
White-Goods Energy Management
The CS5463-ISZR is used in washing machines, dishwashers, and induction-cooktop controllers to measure appliance load for compliance labeling. Designers use the programmable pulse outputs to drive a stepper-register or LCD counter to demonstrate energy savings on receipt, and the on-chip sag detection lets the firmware drop-load on undervoltage conditions, protecting motor drive electronics. The IC's small 24-SSOP footprint allows it to fit alongside the appliance MCU, and its 5 V analog and 3.3 V to 5 V digital supplies directly match the rail voltages available on a white-goods control board. The CS5463-ISZR's -40 C to +85 C operating range supports refrigerator/freezer compartments.
Recommended
Solar PV DC-Side Energy Measurement
In solar PV micro-inverter and DC-optimiser designs, the CS5463-ISZR provides DC-side voltage and current measurement, and computes PV panel instantaneous power and accumulated energy for maximum power point tracking (MPPT) support and panel-fault diagnostics. The bi-directional accumulation tracks both PV output and battery charge/discharge energy flow in battery-coupled PV systems, and the three programmable pulse outputs drive LED and opto-isolated outputs that report panel status to the inverter controller. The on-chip zero-cross detection simplifies the firmware and supports AC-coupled systems where the DC-link must be synchronised to the AC line for grid-tie.
Recommended
EV Charging Station Per-Pole Energy Measurement
Level-2 EV charging stations require per-pole energy measurement for billing and demand-response, and the CS5463-ISZR fits in the small 24-SSOP footprint and directly drives the per-pole stepper-register or LCD counter for billing verification. The bi-directional accumulation handles both forward charging and vehicle-to-grid (V2G) reverse-flow, which is increasingly common in next-generation EV supply equipment. Designers place the CS5463-ISZR between the AC mains sense and the charging controller MCU, and use the SPI/Microwire interface to bring measurements, voltage-sag events, and zero-cross events into the controller firmware. The 4.75 V to 5.25 V analog and 3.3 V to 5 V digital supplies are readily available on a Level-2 EV supply equipment rail.
Recommended
Recommended Products Summary
Engineering reference data for CS5463-ISZR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CS5463-ISZ | CS5463K-ISZR | CS5460A-ISZR | CS5461A-ISZR |
|---|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Package | 24-SSOP (0.209 inch / 5.30 mm) | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same |
| Channels | 1 (single-phase bi-directional) | 1 (same) | 1 (same) | 1 (single) | 1 (single) |
| ADC Resolution | 24-bit Delta-Sigma | 24-bit Delta-Sigma | 24-bit Delta-Sigma | 24-bit Delta-Sigma | 16/24-bit Delta-Sigma |
| Programmable Pulse Outputs | 3 | 3 | 3 | 1 | 1 |
| Sag / Zero-Cross Detection | Yes (both) | Yes | Yes | No | No |
| Analog Supply | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Pin-to-Pin Compatible | Yes (with CS5460A/CS5461A) | Yes - identical to this part | Yes | Yes (this is the upgrade source) | Yes (this is the upgrade source) |
Key Differentiators
- Three programmable pulse outputs vs one pulse output for CS5460A/CS5461A (vs CS5460A-ISZR)
- On-chip sag detection and zero-cross detection absent from CS5460A/CS5461A (vs CS5461A-ISZR)
- K-silicon revision with extended calibration register map (vs CS5463-ISZ)
Design Notes
Decouple the analog VA+ and digital VD+ rails separately with a 10 uF bulk plus a 0.1 uF ceramic pair placed within 5 mm of the IC. Star the analog and digital grounds at a single point near the IC. Use an isolated LDO or ferrite bead to separate the analog VA+ from the digital VD+ supply; do not share a ferrite between them. Recommended VA+ is 5.0 V with 1 percent tolerance to preserve ADC gain accuracy. Estimated input values: VA+ = 5.0 V, ICC = 2.9 mA, total power = 14.5 mW.
Place the anti-aliasing RC network (1 kOhm in series with the IC pin, 33 nF to ground) on each analog input (IIN+, IIN-, VIN+, VIN-) within 5 mm of the IC. Route the analog input traces symmetrically and keep them short to minimise common-mode noise pickup. Use a guarded analog ground pour around the analog input traces and the VREFIN/VREFOUT bypass capacitor; do not allow digital return currents to flow beneath the analog ground pour. Estimated RC cutoff = 1/(2*pi*1kOhm*33nF) = 4.8 kHz.
Do not bury the CS5463-ISZR behind a high-side switching converter without input filtering - the analog front-end rejects high frequencies. Solution: place a 10 uH plus 100 nF LC filter in front of the IC and route analog and digital grounds return separately back to the bulk capacitor. For accuracy-critical designs run the on-chip gain and offset calibration routine in firmware at power-on and re-run at every 30 degree Celsius of temperature change; do not assume the calibration coefficients from the factory are valid across temperature.
The SPI/Microwire interface signals (SCLK, SDI, SDO, CS) are 5 V tolerant and should be routed with the digital ground return. Keep the SPI traces below 50 mm to prevent ringing on the rising edge of SCLK; add a 33 pF series damping resistor on the SCLK trace if the MCU drives SCLK from a high-current buffer. Tie CS high through a 100 kOhm pull-up to keep the serial interface inactive during firmware reset. Estimated SCLK max = 4 MHz per CS5463 datasheet.
Compliance Information
RoHS compliant per Cirrus Logic product page. Lead-free (Pb-free) per 24-SSOP MSL classification. AEC-Q100 not applicable for metering ICs. Halogen-free status not confirmed in public datasheet.
