# ADS7864YB

**Texas Instruments** · Analog To Digital Converters (ADC) · TQFP-48(7x7)

ADS7864YB from Texas Instruments, in a TQFP-48(7x7). 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, normally +5V (supply range 4.75 V to 5.25 V). |
| 2 | AGND | power_in | Analog ground; should be connected to a clean analog ground point. |
| 3 | DB15 | output | Data valid output: '1' indicates valid data and '0' indicates invalid data. |
| 4 | DB14 | output | Channel address output pin (see Table 2). |
| 5 | DB13 | output | Channel address output pin (see Table 2). |
| 6 | DB12 | output | Channel address output pin (see Table 2). |
| 7 | DB11 | output | Data bit 11, the MSB of the conversion result. |
| 8 | DB10 | output | Data bit 10 of the conversion result. |
| 9 | DB9 | output | Data bit 9 of the conversion result. |
| 10 | DB8 | output | Data bit 8 of the conversion result. |
| 11 | DB7 | output | Data bit 7 of the conversion result. |
| 12 | DB6 | output | Data bit 6 of the conversion result. |
| 13 | DB5 | output | Data bit 5 of the conversion result. |
| 14 | DB4 | output | Data bit 4 of the conversion result. |
| 15 | DB3 | output | Data bit 3 of the conversion result. |
| 16 | DB2 | output | Data bit 2 of the conversion result. |
| 17 | DB1 | output | Data bit 1 of the conversion result. |
| 18 | DB0 | output | Data bit 0, the LSB of the conversion result. |
| 19 | BUSY | output | Goes low when a conversion is in progress. |
| 20 | DGND | power_in | Digital ground. |
| 21 | +VD | power_in | Digital power supply, +5 VDC (supply range 4.75 V to 5.25 V). |
| 22 | CLOCK | input | An external clock must be applied to this input; the external clock range is 0.2 MHz to 8 MHz. |
| 23 | RD | input | Enables the parallel output when used in conjunction with chip select. |
| 24 | CS | input | Chip select input. |
| 25 | HOLDC | input | Places channels C0 and C1 in hold mode. |
| 26 | HOLDB | input | Places channels B0 and B1 in hold mode. |
| 27 | HOLDA | input | Places channels A0 and A1 in hold mode. |
| 28 | BYTE | input | 2 × 8 output capability; active high. |
| 29 | A2 | input | Address/mode select pin (see Table 3). |
| 30 | A1 | input | Address/mode select pin (see Table 3). |
| 31 | A0 | input | Address/mode select pin (see Table 3). |
| 32 | RESET | input | Reset pin. |
| 33 | REFOUT | output | Internal reference output; when using the internal reference, a bypass capacitor must not be used and this pin is tied directly to pin 34. |
| 34 | REFIN | input | Reference input; external reference voltage range is 1.2 V to 2.6 V (2.5 V nominal internal reference). |
| 35 | AGND | power_in | Analog ground; should be connected to a clean analog ground point. |
| 36 | +VA | power_in | Analog power supply, normally +5V (supply range 4.75 V to 5.25 V). |
| 37 | CH A1+ | input | Noninverting input, channel A1; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 38 | CH A1- | input | Inverting input, channel A1; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 39 | CH B1+ | input | Noninverting input, channel B1; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 40 | CH B1- | input | Inverting input, channel B1; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 41 | CH C1+ | input | Noninverting input, channel C1; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 42 | CH C1- | input | Inverting input, channel C1; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 43 | CH C0- | input | Inverting input, channel C0; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 44 | CH C0+ | input | Noninverting input, channel C0; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 45 | CH B0- | input | Inverting input, channel B0; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 46 | CH B0+ | input | Noninverting input, channel B0; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 47 | CH A0- | input | Inverting input, channel A0; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |
| 48 | CH A0+ | input | Noninverting input, channel A0; analog inputs are limited to -0.3 V to (+VA + 0.3) V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TQFP-48(7x7) |
| Category | Data Acquisition |
| Pins | 48 |

## CAD (KiCad official)

- Symbol: `ADS7864YB`
- Footprint: `Package_QFP:TQFP-48_7x7mm_P0.5mm`
- 3D model: TQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files: `ads7864yb-etched.step` / `ads7864yb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ads7864yb.step` / `ads7864yb.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/cn/lit/gpn/ads7864) (28 pp, sha256 `b0cb9242130340c6`, retrieved 2026-10-08, tier: lcsc)
- **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/ads7864yb-datasheet.pdf)