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XCS7478
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Si Change Analog To Digital Converters (ADC), SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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XCS7478
Si Change · Analog To Digital Converters (ADC) · SOT-23-6
XCS7478 from Si Change, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Power supply input, which also serves as the reference voltage for the ADC; the datasheet specifies a single supply of 4 V to 5.25 V and says VDD must be greater than or equal to the maximum VIN input to avoid saturation at the maximum conversion code. |
| 2 | GND | power_in | Analog input signal ground and the common circuit ground reference to which all analog and digital signals are referenced. |
| 3 | VIN | power_in | Single-ended analog signal input with an input range of 0 V to VDD. |
| 4 | SCLK | input | Serial clock input that provides the serial clock and acts as the clock source for the conversion process. |
| 5 | SDATA | output | Serial data output that delivers the conversion result as a stream beginning with four leading zeros, MSB first, and goes tri-state after the 12th falling edge of SCLK. |
| 6 | CS | input | Active-low chip select that both starts a conversion and frames the serial data output; CS must stay low for the 12 SCLK cycles, and driving it high before 10 SCLK cycles aborts the conversion. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Si Change |
| Package | SOT-23-6 |
| Category | Data Acquisition |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (single supply) | VDD | 4 | 5.25 | V | 1 | ||
| Operating temperature range | -40 | 85 | ℃ | 1 | |||
| Maximum sample rate | 800 | KSPS | 1 | ||||
| Integral nonlinearity (INL) | INL | -0.5 | 0.5 | LSB | 2 | ||
| Differential nonlinearity (DNL) | DNL | -0.5 | 0.5 | LSB | 2 | ||
| Analog input voltage range (single-ended) | VIN | 0 | V | Single-ended input channel, range 0 V to VDD (upper limit printed as VDD, not a number) | 2 | ||
| Resolution | 8 | bit | No missing codes | 2 | |||
| Signal-to-noise and distortion (SNR) | SNR | 49 | dB | @100 KHz | 2 | ||
| Total harmonic distortion (THD) | THD | -68 | dB | @100 KHz | 2 | ||
| Typical power consumption | 4.8 | mW | 5V, 800 KSPS | 1 | |||
| Typical power consumption | 2.8 | mW | 4V, 800 KSPS | 1 |
CAD (KiCad official)
- Symbol:
XCS7478 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
xcs7478-etched.step/xcs7478-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xcs7478.step/xcs7478.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Si Change datasheet (4 pp, sha256
1393f8253374e7e5, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# XCS7478
**Si Change** · Analog To Digital Converters (ADC) · SOT-23-6
XCS7478 from Si Change, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Power supply input, which also serves as the reference voltage for the ADC; the datasheet specifies a single supply of 4 V to 5.25 V and says VDD must be greater than or equal to the maximum VIN input to avoid saturation at the maximum conversion code. |
| 2 | GND | power_in | Analog input signal ground and the common circuit ground reference to which all analog and digital signals are referenced. |
| 3 | VIN | power_in | Single-ended analog signal input with an input range of 0 V to VDD. |
| 4 | SCLK | input | Serial clock input that provides the serial clock and acts as the clock source for the conversion process. |
| 5 | SDATA | output | Serial data output that delivers the conversion result as a stream beginning with four leading zeros, MSB first, and goes tri-state after the 12th falling edge of SCLK. |
| 6 | CS | input | Active-low chip select that both starts a conversion and frames the serial data output; CS must stay low for the 12 SCLK cycles, and driving it high before 10 SCLK cycles aborts the conversion. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Si Change |
| Package | SOT-23-6 |
| Category | Data Acquisition |
| Pins | 6 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (single supply) | VDD | 4 | | 5.25 | V | | 1 |
| Operating temperature range | | -40 | | 85 | ℃ | | 1 |
| Maximum sample rate | | | | 800 | KSPS | | 1 |
| Integral nonlinearity (INL) | INL | -0.5 | | 0.5 | LSB | | 2 |
| Differential nonlinearity (DNL) | DNL | -0.5 | | 0.5 | LSB | | 2 |
| Analog input voltage range (single-ended) | VIN | 0 | | | V | Single-ended input channel, range 0 V to VDD (upper limit printed as VDD, not a number) | 2 |
| Resolution | | | 8 | | bit | No missing codes | 2 |
| Signal-to-noise and distortion (SNR) | SNR | | 49 | | dB | @100 KHz | 2 |
| Total harmonic distortion (THD) | THD | | -68 | | dB | @100 KHz | 2 |
| Typical power consumption | | | 4.8 | | mW | 5V, 800 KSPS | 1 |
| Typical power consumption | | | 2.8 | | mW | 4V, 800 KSPS | 1 |
## CAD (KiCad official)
- Symbol: `XCS7478`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `xcs7478-etched.step` / `xcs7478-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xcs7478.step` / `xcs7478.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Si Change datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387358947655680) (4 pp, sha256 `1393f8253374e7e5`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/xcs7478-datasheet.pdf)