AD7870: Complete 12-Bit, 100 kHz, Sampling ADC (AD7870/AD7870A)
The AD7870/AD7875/AD7876 is a fast, complete, 12-bit A/D converter. It consists of a track/hold amplifier, 8 us successive approximation ADC, 3 V buried Zener reference and versatile interface logic. The ADC features a self-contained internal clock which is laser trimmed to guarantee accurate control of conversion time. No external clock timing components are required; the on-chip clock may he overridden by an external clock if required.
The parts offer a choice of three data output formats: a single, parallel, 12-bit word; two 8-bit bytes or serial data. Fast bus access times and standard control inputs ensure easy interfacing to modern microprocessors and digital signal processors.
All parts operate from ±5 V power supplies. The AD7870 and AD7876 accept input signal ranges of ±3 V and ±10 V, respectively, while the AD7875 accepts a unipolar 0 V to +5 V input range. The parts can convert full power signals up to 50 kHz.
The AD7870/AD7875/AD7876 feature dc accuracy specifications such as linearity, full-scale and offset error. In addition, the AD7870 and AD7875 are fully specified for dynamic performance parameters including distortion and signal-to-noise ratio.
The parts are available in a 24-pin, 0.3 inch-wide, plastic or hermetic dual-in-line package (DIP). The AD7870 and AD7875 are available in a 28-pin plastic leaded chip carrier (PLCC), while the AD7876 is available and in a 24-pin small outline (SOIC) package.
AD7870 特点
- Complete Monolithic 12-Bit ADC with:
- 2 us Track/Hold Amplifier
- 8 us A/D Converter
- On-Chip Reference
- Laser-Trimmed Clock
- Parallel, Byte and Serial Digital Interface - 57 ns Data Access Time
- 72 dB SNR at 10 kHz Input Frequency
(AD7870, AD7875) - Low Power: –60 mW typ
- Variety of Input Ranges:
- ±3 V for AD7870
- 0 V to +5 V for AD7875
- ±10 V for AD7876
AD7870 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| 5962-9063201M3A | 量产 | LCC:CER LEADLESS CHIP CARR | 28 | 军用 |
| 5962-9063201MLA | 量产 | CERDIP GLASS SEAL | 24 | 军用 |
| AD7870AJNZ | 量产 | 24 ld PDIP | 24 | 商业 |
| AD7870AQ | 量产 | CERDIP GLASS SEAL | 24 | 工业 |
| AD7870BQ | 量产 | CERDIP GLASS SEAL | 24 | 工业 |
| AD7870CQ | 量产 | CERDIP GLASS SEAL | 24 | 工业 |
| AD7870JN | 量产 | 24 ld PDIP | 24 | 商业 |
| AD7870JNZ | 量产 | 24 ld PDIP | 24 | 商业 |
| AD7870JP | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870JP-REEL | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870JPZ | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870JPZ-REEL | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870KN | 量产 | 24 ld PDIP | 24 | 商业 |
| AD7870KNZ | 量产 | 24 ld PDIP | 24 | 商业 |
| AD7870KP-REEL | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870KPZ | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870KPZ-REEL | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870LNZ | 量产 | 24 ld PDIP | 24 | 商业 |
| AD7870LP-REEL | 量产 | 28 ld PLCC | 28 | 商业 |
| AD7870LPZ | 量产 | 28 ld PLCC | 28 | 商业 |