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AD7091R-4BRUZ-RL7
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Analog Devices Analog To Digital Converters (ADCs), TSSOP-20. 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
markdownAD7091R-4BRUZ-RL7
Analog Devices · Analog To Digital Converters (ADCs) · TSSOP-20
AD7091R-4BRUZ-RL7 from Analog Devices, in a TSSOP-20. 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 | CS | input | Chip Select Input: when CS is held low the serial bus is enabled and CS frames the output data on the SPI. |
| 2 | RESET | input | Reset logic input. |
| 3 | VDD | power_in | Power supply input; VDD range is 2.7 V to 5.25 V and the pin must be decoupled to GND. |
| 4 | REGCAP | passive | Decoupling capacitor pin for the voltage output of the internal regulator; decouple separately to GND with a 1.0 µF capacitor. |
| 5 | REFIN/REFOUT | bidirectional | Voltage reference output of 2.5 V that must be decoupled to GND (typical 2.2 µF); an external reference may be applied with a range of 1.0 V to VDD. |
| 6 | GND | power_in | Chip ground pin; ground reference point for all circuitry on the AD7091R-4. |
| 7 | MUXOUT | output | Multiplexer output; tie directly to ADCIN if no external filtering or buffering is required, otherwise tie to the conditioning network output feeding ADCIN. |
| 8 | VIN0 | input | Analog input 0; single-ended input with an analog input range of 0 V to VREF. |
| 9 | VIN2 | input | Analog input 2; single-ended input with an analog input range of 0 V to VREF. |
| 10 | ALERT/BUSY/GPO0 | output | Multifunction output: logic ALERT output indicating a conversion result outside the register limits, BUSY output indicating conversion in progress, or general-purpose digital output, as set by the configuration register. |
| 11 | GPO1 | output | General-purpose digital output. |
| 12 | VIN3 | input | Analog input 3; single-ended input with an analog input range of 0 V to VREF. |
| 13 | VIN1 | input | Analog input 1; single-ended input with an analog input range of 0 V to VREF. |
| 14 | ADCIN | input | ADC input giving access to the on-chip track-and-hold; tie to MUXOUT directly if no external filtering or buffering is required. |
| 15 | GND | power_in | Chip ground pin; ground reference point for all circuitry on the AD7091R-4. |
| 16 | SDI | input | Serial data input bus that provides data written to the on-chip control registers, clocked in on the rising edge of SCLK with MSB first. |
| 17 | SDO | output | Serial data output bus that supplies the conversion result as a serial stream clocked out on the SCLK falling edge; 13 SCLKs are required and data is MSB first. |
| 18 | SCLK | input | Serial clock input for the SPI interface. |
| 19 | CONVST | input | Convert start input; a falling edge places the track-and-hold into hold mode and initiates a conversion. |
| 20 | VDRIVE | power_in | Logic power supply input that sets the interface voltage; range is 1.8 V to 5.25 V and may differ from VDD; decouple with 10 µF and 0.1 µF to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | TSSOP-20 |
| Category | Data Converters |
| Pins | 20 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Signal-to-Noise Ratio (SNR) | SNR | 66.5 | 70 | dB | fIN = 10 kHz sine wave | 3 | |
| Signal-to-Noise-and-Distortion (SINAD) Ratio | SINAD | 65.5 | 69 | dB | fIN = 10 kHz sine wave | 3 | |
| Integral Nonlinearity (INL) | INL | -1 | 0.7 | 1 | LSB | VDD ≥ 3.0 V | 3 |
| Integral Nonlinearity (INL) | INL | -1.25 | 0.8 | 1.25 | LSB | VDD ≥ 2.7 V | 3 |
| Differential Nonlinearity (DNL) | DNL | -0.9 | 0.3 | 0.9 | LSB | Guaranteed no missing codes to 12 bits | 3 |
| Offset Error | -1.5 | 0.2 | 1.5 | mV | TA = 25°C | 3 | |
| Offset Error Matching | -1.5 | 0.2 | 1.5 | mV | TA = 25°C | 3 | |
| Gain Error | -0.1 | 0 | 0.1 | % FS | TA = 25°C | 3 | |
| Gain Error Matching | -0.1 | 0 | 0.1 | % FS | TA = 25°C | 3 | |
| DC Leakage Current | -1 | 1 | µA | 3 | |||
| Internal reference output (REFOUT) | REFOUT | 2.49 | 2.5 | 2.51 | V | Internal reference output, TA = 25°C | 3 |
| External reference input (REFIN) | REFIN | 1 | V | External reference input | 3 | ||
| Input Current (logic inputs) | IIN | -1 | 1 | µA | Typically 10 nA, VIN = 0 V or VDRIVE | 3 | |
| Output Low Voltage | VOL | 0.4 | V | ISINK = 200 µA | 3 | ||
| Floating State Leakage Current | -1 | 1 | µA | 3 | |||
| VDD to GND | VDD | -0.3 | 7 | V | Rating to GND | 7 | |
| VDRIVE to GND | VDRIVE | -0.3 | 7 | V | Rating to GND | 7 | |
| Input Current to Any Pin Except Supplies | -10 | 10 | mA | 7 | |||
| Operating Temperature Range | TA | -40 | 125 | °C | 7 | ||
| Storage Temperature Range | -65 | 150 | °C | 7 | |||
| Junction Temperature | TJ | 150 | °C | 7 | |||
| ESD Human Body Model (HBM) | 1.5 | kV | 7 | ||||
| ESD Field Induced Charged Device Model (FICDM) | 500 | V | 7 | ||||
| Supply voltage VDD | VDD | 2.7 | 5.25 | V | Specified supply range | 1 | |
| Logic supply voltage VDRIVE | VDRIVE | 1.8 | 5.25 | V | Voltage range on VDRIVE pin | 8 | |
| Thermal resistance, junction-to-ambient, 20-Lead TSSOP | θJA | 84.29 | °C/W | Device soldered in circuit board, surface-mount package | 7 | ||
| Thermal resistance, junction-to-case, 20-Lead TSSOP | θJC | 18.43 | °C/W | 7 |
CAD (KiCad official)
- Symbol:
AD7091R-4BRUZ-RL7 - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
ad7091r-4bruz-rl7-etched.step/ad7091r-4bruz-rl7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad7091r-4bruz-rl7.step/ad7091r-4bruz-rl7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (39 pp, sha256
9c0395b23368e515, retrieved 2026-10-28, 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).