# ADS7951SRGER

**Texas Instruments** · Analog To Digital Converters (ADC) · VQFN-24-EP(4x4)

ADS7951SRGER from Texas Instruments, in a VQFN-24-EP(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 | +VA | power_in | Analog power supply; the analog supply range is 2.7 V to 5.25 V. |
| 2 | AGND | power_in | Analog ground. |
| 3 | MXO | output | Multiplexer output. |
| 4 | AINP | input | ADC input signal. |
| 5 | AINM | input | ADC input ground. |
| 6 | CH7 | input | Analog-input channel for the multiplexer. |
| 7 | CH6 | input | Analog-input channel for the multiplexer. |
| 8 | CH5 | input | Analog-input channel for the multiplexer. |
| 9 | CH4 | input | Analog-input channel for the multiplexer. |
| 10 | CH3 | input | Analog-input channel for the multiplexer. |
| 11 | CH2 | input | Analog-input channel for the multiplexer. |
| 12 | CH1 | input | Analog-input channel for the multiplexer. |
| 13 | CH0 | input | Analog-input channel for the multiplexer. |
| 14 | +VA | power_in | Analog power supply; the analog supply range is 2.7 V to 5.25 V. |
| 15 | AGND | power_in | Analog ground. |
| 16 | CS | input | Chip-select input pin; active low. |
| 17 | SCLK | input | Serial clock input pin. |
| 18 | SDI | input | Serial data input pin. |
| 19 | SDO | output | Serial data output pin. |
| 20 | BDGND | power_in | Digital ground. |
| 21 | +VBD | power_in | Digital I/O supply. |
| 22 | GPIO0 | bidirectional | General-purpose input or output; can be configured as the active-high alarm output. |
| 23 | REFM | input | Reference ground. |
| 24 | REFP | input | Reference input. |
| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-24-EP(4x4) |
| Category | Data Acquisition |
| Pins | 25 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Analog power-supply voltage | V(+VA) | 2.7 | 3.3 | 5.25 | V |  | 10 |
| Digital I/O-supply voltage | V(+VBD) | 1.7 | 3.3 |  | V |  | 10 |
| Reference voltage | V(REF) | 2 | 2.5 | 3 | V |  | 10 |
| SCLK frequency | f(SCLK) |  |  | 20 | MHz |  | 10 |
| Operating temperature range | TA | -40 |  | 125 | °C |  | 10 |
| +VA to AGND, +VBD to BDGND |  | -0.3 |  | 7 | V |  | 10 |
| Digital input voltage to BDGND |  | -0.3 |  | 7 | V |  | 10 |
| Input current to any pin except supply pins |  | -10 |  | 10 | mA |  | 10 |
| Operating temperature |  | -40 |  | 125 | °C |  | 10 |
| Junction temperature (TJ Max) | TJ |  |  | 150 | °C |  | 10 |
| Storage temperature (Tstg) | Tstg | -65 |  | 150 | °C |  | 10 |
| Junction-to-ambient thermal resistance (RGE 24-pin) | RθJA |  | 36.9 |  | °C/W |  | 11 |
| Junction-to-case (top) thermal resistance (RGE 24-pin) | RθJC(top) |  | 39.3 |  | °C/W |  | 11 |
| Junction-to-board thermal resistance (RGE 24-pin) | RθJB |  | 14.7 |  | °C/W |  | 11 |
| Junction-to-top characterization parameter (RGE 24-pin) | ψJT |  | 0.7 |  | °C/W |  | 11 |
| Junction-to-board characterization parameter (RGE 24-pin) | ψJB |  | 14.8 |  | °C/W |  | 11 |
| Junction-to-case (bottom) thermal resistance (RGE 24-pin) | RθJC(bot) |  | 5.6 |  | °C/W |  | 11 |
| Full-scale input span Range 1 |  | 0 |  |  | V | Range 1 | 12 |
| Input capacitance |  |  | 15 |  | pF |  | 12 |
| Input leakage current |  |  |  | 61 | nA | TA = 125°C | 12 |
| Integral linearity (ADS795XSB) |  | -1 | 0.5 | 1 | LSB | ADS795XSB | 12 |
| Integral linearity (ADS795XS) |  | -1.5 | 0.75 | 1.5 | LSB | ADS795XS | 12 |
| Differential linearity (ADS795XSB) |  | -0.99 | 0.5 | 1 | LSB | ADS795XSB | 12 |
| Differential linearity (ADS795XS) |  | -2 | 0.75 | 1.5 | LSB | ADS795XS | 12 |
| Offset error |  | -3.5 | 1.1 | 3.5 | LSB |  | 12 |
| Gain error Range 1 |  | -2 | 0.2 | 2 | LSB | Range 1 | 12 |
| Total unadjusted error (TUE) |  | -2 |  | 2 | LSB |  | 12 |
| Signal-to-noise ratio (ADS795XSB) | SNR | 70 | 71.7 |  | dB | 100 kHz, ADS795XSB | 13 |
| Signal-to-noise ratio (ADS795XS) | SNR | 70 | 71.7 |  | dB | 100 kHz, ADS795XS | 13 |
| Signal-to-noise + distortion (ADS795XSB) | SINAD | 69 | 71.3 |  | dB | 100 kHz, ADS795XSB | 13 |
| Signal-to-noise + distortion (ADS795XS) | SINAD | 68 | 71.3 |  | dB | 100 kHz, ADS795XS | 13 |
| Total harmonic distortion | THD |  | -82 |  | dB | 100 kHz | 13 |
| Reference voltage at REFP | VREF | 2 | 2.5 | 3 | V |  | 13 |
| Reference input resistance |  |  | 100 |  | kΩ | At fsample = 1 MHz | 13 |
| High threshold range |  | 0 |  | 4092 | LSB |  | 13 |
| Low threshold range |  | 0 |  | 4092 | LSB |  | 13 |
| Low-level input voltage VIL | VIL |  |  | 0.8 | V | +VBD = 5 V | 13 |
| Low-level input voltage VIL | VIL |  |  | 0.4 | V | +VBD = 3 V | 13 |
| Low-level output voltage VOL | VOL |  |  | 0.4 | V | At Isink = 200 μA | 13 |
| +VA supply voltage | +VA | 2.7 | 3.3 | 5.25 | V |  | 13 |
| +VBD supply voltage | +VBD | 1.7 | 3.3 | 5.25 | V |  | 13 |
| Supply current (normal mode) at +VA = 4.7 to 5.25 V and 1 MHz throughput | IA |  | 2.3 | 3 | mA | At +VA = 4.7 to 5.25 V and 1 MHz throughput | 13 |
| Supply current (normal mode) at +VA = 4.7 to 5.25 V static state | IA |  | 1.1 | 1.5 | mA | At +VA = 4.7 to 5.25 V static state | 13 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | • A copper fill area underneath the device ties the AGND, BDGND, AINM, and REFM pins together. This | 52 |

## CAD (KiCad official)

- Symbol: `ADS7951SRGER`
- Footprint: `Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm`
- 3D model: VQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files: `ads7951srger-etched.step` / `ads7951srger-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ads7951srger.step` / `ads7951srger.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/ads7951.pdf) (87 pp, sha256 `e7922065e4d1691d`, retrieved 2026-11-05, tier: manufacturer)
- **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/ads7951srger-datasheet.pdf)