| ADS7870 | |
| Resolution(Bits) | 12 |
| Sample Rate (max) | 52kSPS |
| Architecture | SAR |
| Power Consumption(Typ)(mW) | 4.6 |
| SINAD(dB) | 72 |
| DNL(Max)(+/-LSB) | 0.5 |
| INL(Max)(+/-LSB) | 2 |
| No Missing Codes(Bits) | 12 |
| No. of Supplies | 1 |
| Analog Voltage AV/DD(Min)(V) | 2.7 |
| 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/PGA(1,2,4,5,8,10,16,20) |
| Reference Mode | Int |
| Rating | Catalog |
| Pin/Package | 28SSOP |
| # Input Channels | 8 |
| Operating Temperature Range(°C) | -40 to 85 |
The ADS7870 (US patents 6140872, 6060874) is a complete low-power data acquisition system on a single chip. It consists of a 4-channel differential/8-channel single-ended multiplexer, precision programmable gain amplifier, 12-bit successive approximation analog-to-digital (A/D) converter, and a precision voltage reference.
The programmable-gain amplifier provides high input impedance, excellent gain accuracy, good common-mode rejection, and low noise.
For many low-level signals, no external amplification or impedance buffering is needed between the signal source and the A/D input.
The offset voltage of the PGA is auto zeroed. Gains of 1, 2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125 mV to produce full-scale digital outputs.
| 器件 | 状态 | 温度 (oC) | 价格（美元） | 封装 | 引脚 |
| ADS7870EA | ACTIVE | -40 to 85 | 4.60 | 1ku | SSOP(DB) | 28 |
| ADS7870EA/1K | ACTIVE | -40 to 85 | 4.15 | 1ku | SSOP(DB) | 28 |
| ADS7870EA/1KG4 | ACTIVE | -40 to 85 | 4.15 | 1ku | SSOP(DB) | 28 |
| ADS7870EAG4 | ACTIVE | -40 to 85 | 4.60 | 1ku | SSOP(DB) | 28 |