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ADS8321EB/2K5
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Texas Instruments Analog To Digital Converters (ADCs), VSSOP-8. 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
markdownADS8321EB
Texas Instruments · Analog To Digital Converters (ADCs) · VSSOP-8
ADS8321EB from Texas Instruments, in a VSSOP-8. 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 | VREF | power_in | Reference input that sets the analog input range; the external reference can be any voltage from 500mV to VCC/2, and the external reference absolute maximum is +5.5V. |
| 2 | +In | input | Non-inverting analog input; it should remain within GND - 300mV to VCC + 300mV, outside which the converter's linearity may not meet specifications. |
| 3 | -In | input | Inverting analog input; it should remain within GND - 300mV to 4V, outside which the converter's linearity may not meet specifications. |
| 4 | GND | power_in | Ground pin, which should be placed on a clean ground point and kept away from microcontroller, microprocessor, or DSP ground connections. |
| 5 | CS/SHDN | input | Chip select when LOW; shutdown mode when HIGH, and a new conversion starts only when CS has been taken HIGH and returned LOW. |
| 6 | DOUT | output | Serial data output of 16 bits, valid on the falling edge of DCLOCK; the second DCLOCK pulse after the falling edge of CS enables the output, and after one null bit the data is valid for the next 16 edges. |
| 7 | DCLOCK | input | Data clock that synchronizes the serial data transfer and determines the conversion speed. |
| 8 | +VCC | power_in | Power supply input; specified performance is 4.75V to 5.25V, the VCC range is 2.7V to 5.25V, and the absolute maximum is +6V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Data Converters |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| No Missing Codes | 15 | Bits | 3 | ||||
| Integral Linearity Error | -0.012 | 0.006 | 0.012 | % of FSR | 3 | ||
| Offset Error | -1 | 0.2 | 1 | mV | 3 | ||
| Offset Temperature Drift | -1 | 1 | 1 | µV/°C | 3 | ||
| Gain Error, Positive | -0.024 | 0.024 | % | 3 | |||
| Gain Error, Negative | -0.024 | 0.024 | % | 3 | |||
| Gain Temperature Drift | -0.3 | 0.3 | ppm/°C | 3 | |||
| Absolute Input Range (+In) | -0.1 | V | 3 | ||||
| Absolute Input Range (-In) | -0.1 | 4 | V | 3 | |||
| Common-Mode Rejection Ratio | 80 | dB | 3 | ||||
| Power Supply Rejection Ratio | 3 | LSB | +4.7V < VCC < 5.25V | 3 | |||
| Clock Frequency Range | 0.024 | 2.9 | MHz | 3 | |||
| Input High Voltage | VIH | 3 | V | IIH = +5µA | 3 | ||
| Input Low Voltage | VIL | -0.3 | 0.8 | V | IIL = +5µA | 3 | |
| Output High Voltage | VOH | 4 | V | IOH = -250µA | 3 | ||
| Output Low Voltage | VOL | 0.4 | V | IOL = 250µA | 3 | ||
| VCC Specified Performance | 4.75 | 5.25 | V | 3 | |||
| VCC Range | 2.7 | 5.25 | V | 3 | |||
| Quiescent Current | 1100 | 1700 | µA | 3 | |||
| Power Dissipation | 5.5 | 8.5 | mW | 3 | |||
| Power Down Supply Current | 0.3 | 3 | µA | CS = VCC | 3 | ||
| Specified Performance (temperature range) | -40 | 85 | °C | 3 | |||
| Reference Input Voltage Range | 0.5 | V | 3 | ||||
| Reference Current Drain | 40 | 80 | µA | 3 | |||
| Reference Current Drain (power down) | 0.1 | 3 | µA | CS = VCC | 3 | ||
| Leakage Current | 1 | nA | 3 | ||||
| Analog Input Sample Time | tSMPL | 4.5 | 5 | Clk Cycles | 9 | ||
| CS Falling to DCLOCK Rising | tSUCS | 20 | ns | 9 | |||
| DCLOCK Falling to DOUT Not Valid (hold) | thDO | 5 | 15 | ns | 9 | ||
| DCLOCK Falling to Next DOUT Valid | tdDO | 30 | 50 | ns | 9 | ||
| CS Rising to DOUT Tri-State | tdis | 70 | 100 | ns | 9 | ||
| DCLOCK Falling to DOUT Enabled | ten | 20 | 50 | ns | 9 | ||
| DOUT Fall Time | tf | 5 | 25 | ns | 9 | ||
| DOUT Rise Time | tr | 7 | 25 | ns | 9 | ||
| VCC Supply Voltage (absolute maximum) | VCC | 6 | V | 2 | |||
| Analog Input (absolute maximum) | -0.3 | V | 2 | ||||
| Logic Input (absolute maximum) | -0.3 | 6 | V | 2 | |||
| Case Temperature (absolute maximum) | 100 | °C | 2 | ||||
| Junction Temperature (absolute maximum) | 150 | °C | 2 | ||||
| Storage Temperature (absolute maximum) | 125 | °C | 2 | ||||
| External Reference Voltage (absolute maximum) | 5.5 | V | 2 |
CAD (KiCad official)
- Symbol:
ADS8321EB - Footprint:
Package_SO:VSSOP-8_3x3mm_P0.65mm - 3D model: VSSOP-8, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.1 mm tall, datasheet A, max). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
- 3D model files:
ads8321eb-2k5-etched.step/ads8321eb-2k5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ads8321eb-2k5.step/ads8321eb-2k5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (18 pp, sha256
8172760a1091a893, retrieved 2026-11-11, 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).