| ADS7891 | |
| Resolution(Bits) | 14 |
| Sample Rate (max) | 3MSPS |
| Architecture | SAR |
| Power Consumption(Typ)(mW) | 85 |
| SINAD(dB) | 77 |
| SNR(dB) | 78 |
| SFDR(dB) | 90 |
| DNL(Max)(+/-LSB) | 0.75 |
| INL(Max)(+/-LSB) | 0.75 |
| No Missing Codes(Bits) | 14 |
| No. of Supplies | 2 |
| Analog Voltage AV/DD(Min)(V) | 4.75 |
| Analog Voltage AV/DD(Max)(V) | 5.25 |
| Logic Voltage DV/DD(Min)(V) | 2.7 |
| Logic Voltage DV/DD(Max)(V) | 5.25 |
| Input Configuration Range | Vref |
| Reference Mode | Int |
| Rating | Catalog |
| Pin/Package | 48TQFP |
| # Input Channels | 1 |
| Operating Temp Range(Celsius) | -40 to 85 |
The ADS7891 is a 14-bit 3-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit parallel interface with an additional byte mode that provides easy interface with 8-bit processors. The device has a pseudo-differential input stage.
The –IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. With nap mode enabled, the device operates at lower power when used at lower conversion rates. The device is available in a 48-pin TQFP package.
| 器件 | 状态 | 温度 (oC) | 价格（美元） | 封装 | 引脚 |
| ADS7891IPFBR | ACTIVE | -40 to 85 | 13.15 | 1ku | TQFP (PFB) | 48 |
| ADS7891IPFBRG4 | ACTIVE | -40 to 85 | 13.15 | 1ku | TQFP (PFB) | 48 |
| ADS7891IPFBT | ACTIVE | -40 to 85 | 14.45 | 1ku | TQFP (PFB) | 48 |
| ADS7891IPFBTG4 | ACTIVE | -40 to 85 | 14.45 | 1ku | TQFP (PFB) | 48 |