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AD7689ACPZRL7
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Analog Devices Analog To Digital Converters (ADCs), 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
markdownAD7689ACPZRL7
Analog Devices · Analog To Digital Converters (ADCs) · LFCSP-20(4x4)
AD7689ACPZRL7 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 | Power supply, nominally 2.5 V to 5.5 V with an external reference, decoupled with 10 µF and 100 nF capacitors; the minimum is 3.0 V when using the internal 2.5 V reference and 4.5 V when using the internal 4.096 V reference. |
| 2 | REF | bidirectional | Reference input/output that produces a selectable 2.5 V or 4.096 V system reference when the internal reference is enabled, or a buffered REFIN voltage up to VDD − 0.5 V, or accepts a precision reference from 0.5 V to VDD; it needs a 10 µF decoupling capacitor placed as close as possible to the pin. |
| 3 | REFIN | bidirectional | Internal unbuffered reference output requiring 0.1 µF decoupling when the internal reference is used, or reference buffer input accepting 0.5 V to (VDD − 0.5 V) when the internal reference buffer is used. |
| 4 | GND | power_in | Power supply ground. |
| 5 | GND | power_in | Power supply ground. |
| 6 | IN4 | input | Analog input channel 4 of the 8-channel multiplexer, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 7 | IN5 | input | Analog input channel 5 of the 8-channel multiplexer, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 8 | IN6 | input | Analog input channel 6 of the 8-channel multiplexer, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 9 | IN7 | input | Analog input channel 7 of the 8-channel multiplexer, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 10 | COM | input | Common channel input to which all input channels IN[7:0] can be referenced, at a common-mode point of 0 V or VREF/2 V. |
| 11 | CNV | input | Conversion input whose rising edge starts a conversion; holding CNV low during conversion enables the busy indicator. |
| 12 | DIN | input | Data input for writing the 14-bit configuration register, which can be written during and after conversion. |
| 13 | SCK | input | Serial data clock input that clocks data out on SDO and data in on DIN, MSB first. |
| 14 | SDO | output | Serial data output synchronized to SCK, giving straight binary results in unipolar modes and twos complement results in bipolar modes. |
| 15 | VIO | power_in | Input/output interface digital power, nominally at the host interface supply of 1.8 V, 2.5 V, 3 V, or 5 V; VIO to VDD must stay within −0.3 V to VDD + 0.3 V. |
| 16 | IN0 | input | Analog input channel 0, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 17 | IN1 | input | Analog input channel 1 of the 8-channel multiplexer, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 18 | IN2 | input | Analog input channel 2 of the 8-channel multiplexer, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 19 | IN3 | input | Analog input channel 3 of the 8-channel multiplexer, with absolute input limits of GND − 0.3 V to VDD + 0.3 V. |
| 20 | VDD | power_in | Power supply, nominally 2.5 V to 5.5 V with an external reference, decoupled with 10 µF and 100 nF capacitors; the minimum is 3.0 V when using the internal 2.5 V reference and 4.5 V when using the internal 4.096 V reference. |
| 21 | EPAD | passive | Exposed pad that is not connected internally and should be soldered to the system ground plane for increased solder joint reliability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | LFCSP-20(4x4) |
| Category | ADC/DAC/Data Conversion |
| 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 |
|---|---|---|---|---|---|---|---|
| Unipolar analog input voltage range (min) | 0 | V | Unipolar mode; max printed as +VREF | 3 | |||
| Absolute input voltage, positive input (min) | -0.1 | V | Positive input, unipolar and bipolar modes; max printed as VREF + 0.1 | 3 | |||
| Absolute input voltage, negative or COM input (unipolar) | -0.1 | 0.1 | V | Negative or COM input, unipolar mode | 3 | ||
| Conversion rate, full bandwidth | 0 | 250 | kSPS | VDD = 4.5 V to 5.5 V | 3 | ||
| Conversion rate, full bandwidth | 0 | 200 | kSPS | VDD = 2.3 V to 4.5 V | 3 | ||
| Conversion rate, 1/4 bandwidth | 0 | 62.5 | kSPS | VDD = 4.5 V to 5.5 V | 3 | ||
| Conversion rate, 1/4 bandwidth | 0 | 50 | kSPS | VDD = 2.3 V to 4.5 V | 3 | ||
| Integral linearity error | INL | -4 | 4 | LSB | 3 | ||
| Differential linearity error | DNL | -1 | 1.5 | LSB | 3 | ||
| Gain error | -32 | 32 | LSB | 3 | |||
| Gain error match | -2 | 2 | LSB | 3 | |||
| Gain error temperature drift | -1 | 1 | ppm/°C | 3 | |||
| Offset error | -32 | 32 | LSB | VDD = 4.5 V to 5.5 V | 3 | ||
| Offset error match | -2 | 2 | LSB | 3 | |||
| Offset error temperature drift | -1 | 1 | ppm/°C | 3 | |||
| Power supply sensitivity | -1.5 | 1.5 | LSB | VDD = 5 V ± 5% | 3 | ||
| Dynamic range | 90.5 | 93.8 | dB | 3 | |||
| Signal-to-noise ratio (SNR) | SNR | 90 | 92.5 | 93.5 | dB | LFCSP, fIN = 20 kHz, VREF = 5 V | 3 |
| Signal-to-noise ratio (SNR) | SNR | 89 | 91 | 92.3 | dB | fIN = 20 kHz, VREF = 4.096 V, internal REF | 3 |
| Signal-to-noise ratio (SNR) | SNR | 86 | 87.5 | 88.8 | dB | fIN = 20 kHz, VREF = 2.5 V, internal REF | 3 |
| Supply voltage VDD (Table 2 conditions) | VDD | 2.3 | 5.5 | V | VIO = 1.8 V to VDD, VREF = VDD, all specifications | 3 | |
| Interface supply VIO | VIO | 1.8 | V | VIO = 1.8 V to VDD; max = VDD | 3 | ||
| Operating ambient temperature | TA | -40 | 85 | °C | Specified range, all specifications unless otherwise noted | 3 | |
| VDD minimum with internal 2.5 V reference | VDD | 3 | V | Internal reference set to 2.5 V output | 11 | ||
| VDD minimum with internal 4.096 V reference | VDD | 4.5 | V | Internal reference set to 4.096 V output | 11 | ||
| REF input from precision reference | REF | 0.5 | V | Precision reference connected to REF; max = VDD | 11 | ||
| REFIN source for buffered reference | REFIN | 0.5 | V | Source buffered to REF; max = VDD − 0.5 V | 11 | ||
| VDD, VIO to GND | VDD, VIO | -0.3 | 7 | V | 10 | ||
| VIO to VDD | VIO | -0.3 | V | Max printed as VDD + 0.3 V | 10 | ||
| DIN, CNV, SCK to GND | -0.3 | V | Max printed as VIO + 0.3 V | 10 | |||
| SDO to GND | -0.3 | V | Max printed as VIO + 0.3 V | 10 | |||
| INx, COM to GND | -0.3 | V | Max printed as VDD + 0.3 V or VDD | 10 | |||
| Analog input current (INx, COM) | -130 | 130 | mA | 10 | |||
| REF, REFIN to GND | -0.3 | V | Max printed as VDD + 0.3 V | 10 | |||
| Storage temperature range | -65 | 150 | °C | 10 | |||
| Junction temperature | TJ | 150 | °C | 10 | |||
| Thermal impedance, junction-to-ambient (LFCSP) | θJA | 48 | °C/W | LFCSP | 10 | ||
| Thermal impedance, junction-to-case (LFCSP) | θJC | 4.4 | °C/W | LFCSP | 10 |
CAD (KiCad official)
- Symbol:
AD7689ACPZRL7 - Footprint:
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm - 3D model: LFCSP-20(4x4) (KiCad packages3D, STEP)
- 3D model files:
ad7689acpzrl7-etched.step/ad7689acpzrl7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad7689acpzrl7.step/ad7689acpzrl7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (37 pp, sha256
028312fc80ae8a4b, retrieved 2026-10-31, tier: manufacturer) - 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).