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AD7689BCPZ
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Analog Devices Analog To Digital Converters (ADC), LFCSP-20(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownAD7689BCPZ
Analog Devices · Analog To Digital Converters (ADC) · LFCSP-20(4x4)
AD7689BCPZ from Analog Devices, in a LFCSP-20(4x4). 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 | Supply input for the ADC core, specified from 2.5 V to 5.5 V and recommended to be decoupled with 10 μF and 100 nF. |
| 2 | REF | bidirectional | Reference voltage pin, which can be driven from the internal reference (0.5 V to VDD) and needs 10 μF decoupling to GND when the internal buffer is used. |
| 3 | REFIN | bidirectional | Reference input for an external reference, with the datasheet range of 0.5 V to VDD − 0.5 V. |
| 4 | GND | power_in | Ground reference for the analog and digital circuits. |
| 5 | GND | power_in | Ground reference for the analog and digital circuits (second ground pin). |
| 6 | IN4 | input | Analog input channel 4 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 7 | IN5 | input | Analog input channel 5 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 8 | IN6 | input | Analog input channel 6 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 9 | IN7 | input | Analog input channel 7 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 10 | COM | input | Common analog input for the channel multiplexer; its voltage limits are not legible in the extracted text. |
| 11 | CNV | input | Convert input; a rising edge on CNV starts a conversion. |
| 12 | DIN | input | Serial data input used to configure the ADC during the SPI transfer. |
| 13 | SCK | input | Serial clock input for the SPI-compatible interface. |
| 14 | SDO | output | Serial data output that shifts out conversion results MSB first, with logic levels referenced to VIO. |
| 15 | VIO | power_in | Digital interface supply, selectable at 1.8 V, 2.5 V, 3 V, or 5 V, and decoupled with 100 nF. |
| 16 | IN0 | input | Analog input channel 0 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 17 | IN1 | input | Analog input channel 1 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 18 | IN2 | input | Analog input channel 2 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 19 | IN3 | input | Analog input channel 3 of the 8-channel multiplexer; input range is 0 V to VREF/2 V as stated for IN[7:0]. |
| 20 | VDD | power_in | Supply input for the ADC core, specified from 2.5 V to 5.5 V (second VDD pin). |
| 21 | EPAD | unconnected | Exposed pad is not connected internally and should be soldered to the system ground plane for solder joint reliability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | LFCSP-20(4x4) |
| Category | Data Acquisition |
| Pins | 21 |
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 VDD | VDD | 2.3 | 5.5 | V | 5 | ||
| Interface supply VIO | VIO | 1.8 | V | Maximum is printed as VDD + 0.3 V | 5 | ||
| Operating temperature range | TMIN, TMAX | -40 | 85 | °C | 5 | ||
| Digital input low voltage VIL | VIL | -0.3 | V | Maximum printed as 0.3 × VIO | 5 | ||
| Digital input leakage current low | IIL | -1 | 1 | μA | 5 | ||
| Digital input leakage current high | IIH | -1 | 1 | μA | 5 | ||
| Digital output low voltage | VOL | 0.4 | V | ISINK = +500 μA | 5 | ||
| Power dissipation (typical / maximum) | 12.5 | 18 | mW | 5 | |||
| Throughput rate, VDD 4.5 V to 5.5 V | 0 | 250 | kSPS | VDD = 4.5 V to 5.5 V | 3 | ||
| Throughput rate, VDD 2.3 V to 4.5 V | 0 | 200 | kSPS | VDD = 2.3 V to 4.5 V | 3 | ||
| Throughput rate (second set), VDD 4.5 V to 5.5 V | 0 | 62.5 | kSPS | VDD = 4.5 V to 5.5 V | 3 | ||
| Throughput rate (second set), VDD 2.3 V to 4.5 V | 0 | 50 | kSPS | VDD = 2.3 V to 4.5 V | 3 | ||
| Integral nonlinearity INL | INL | -1.5 | 0.4 | 1.5 | LSB | 3 | |
| Differential nonlinearity DNL | DNL | -1 | 0.25 | 1.5 | LSB | 3 | |
| Unipolar zero/offset error (label not fully extracted) | -8 | 1 | 8 | LSB | 3 | ||
| Bipolar zero error (label not fully extracted) | -4 | 0.5 | 4 | LSB | 3 | ||
| Offset error, VDD 4.5 V to 5.5 V (label not fully extracted) | -8 | 1 | 8 | LSB | VDD = 4.5 V to 5.5 V | 3 | |
| Absolute maximum VDD / VIO to GND | VDD, VIO | -0.3 | 7 | V | 8 | ||
| Input current (any pin except supplies) | -130 | 130 | mA | 8 | |||
| Storage temperature range | -65 | 150 | °C | 8 | |||
| Junction temperature | 150 | °C | 8 | ||||
| Thermal resistance junction-to-ambient (LFCSP) | θJA | 47.6 | °C/W | LFCSP package | 8 | ||
| Thermal resistance junction-to-case (LFCSP) | θJC | 4.4 | °C/W | LFCSP package | 8 |
CAD (KiCad official)
- Symbol:
AD7689BCPZ - Footprint:
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm - 3D model: LFCSP-20(4x4) (KiCad packages3D, STEP)
- 3D model files:
ad7689bcpz-etched.step/ad7689bcpz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad7689bcpz.step/ad7689bcpz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (32 pp, sha256
66df19b59b0d6f7e, retrieved 2026-10-18, tier: lcsc) - 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).