The AD7874 is a four-channel simultaneous sampling, 12-bit data acquisition system. The part contains a high speed 12-bit ADC, on chip reference, on-chip clock and four track/hold amplifiers. This latter feature allows the four input channels to be sampled simultaneously, thus preserving the relative phase information of the four input channels, which is not possible if all four channels share a single track/hold amplifier. This makes the AD7874 ideal for applications such as phased-array sonar and ac motor controllers where the relative phase information is important.
The aperture delay of the four track/hold amplifiers is small and specified with minimum and maximum limits. This allows several AD7874s to sample multiple input channels simultaneously without incurring phase errors between signals connected to several devices. A reference output/reference input facility also allows several AD7874s to be driven from the same reference source.
In addition to the traditional dc accuracy specifications such as linearity, full-scale and offset errors, the AD7874 is also fully specified for dynamic performance parameters including distortion and signal-to-noise ratio.
The AD7874 is fabricated in Analog Devices' Linear Compatible CMOWS (LC2MOS) process, a mixed technology process that combines precision bipolar circuits with low-power CMOS logic. The part is available in a 28-pin, 0.6" wide, plastic or hermetic dual-in-line package (DIP), in a 28-terminal leadless ceramic chip carrier (LCCC) and in a 28-pin SOIC.
Features and Benefits
| Analog to Digital Converters |
| Document | note |
| AD7874: 4-Channel Simultaneous Sampling, 12-Bit Data Acquisition System Data Sheet (Rev. C) | PDF 414 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| 5962-9152101M3A Production | LCC:CER LEADLESS CHIP CARR | OTH 42 | -55 to 125C | 255 | 230.5 | N |
| 5962-9152101MXA Production | CERDIP GLASS SEAL | OTH 12 | -55 to 125C | 197.87 | 178.87 | N |
| AD7874ACHIPS Production | CHIPS OR DIE | REEL 35 | 25C | 37.72 | 37.72 | Y |
| AD7874AN Production | 28 ld PDIP (600mil) | OTH 13 | -40 to 85C | 0 | 0 | N |
| AD7874ANZ Production | 28 ld PDIP (600mil) | OTH 13 | -40 to 85C | 49.36 | 44.62 | Y |
| AD7874AQ Production | CERDIP GLASS SEAL | OTH 12 | -40 to 85C | 63.92 | 54.33 | N |
| AD7874AR Production | 28 ld SOIC - Wide | OTH 27 | -40 to 85C | 45.54 | 41.18 | N |
| AD7874AR-REEL7 Production | 28 ld SOIC - Wide | REEL 400 | -40 to 85C | 0 | 0 | N |
| AD7874ARZ Production | 28 ld SOIC - Wide | OTH 27 | -40 to 85C | 41.48 | 37.5 | Y |
| AD7874ARZ-REEL Production | 28 ld SOIC - Wide | REEL 1000 | -40 to 85C | 0 | 37.5 | Y |
| AD7874ARZ-REEL7 Production | 28 ld SOIC - Wide | REEL 400 | -40 to 85C | 0 | 37.5 | Y |
| AD7874BN Production | 28 ld PDIP (600mil) | OTH 13 | -40 to 85C | 0 | 0 | N |
| AD7874BNZ Production | 28 ld PDIP (600mil) | OTH 13 | -40 to 85C | 61.7 | 55.77 | Y |
| AD7874BQ Production | CERDIP GLASS SEAL | OTH 12 | -40 to 85C | 0 | 0 | N |
| AD7874BRZ Production | 28 ld SOIC - Wide | OTH 27 | -40 to 85C | 51.87 | 46.89 | Y |
| AD7874SE Production | LCC:CER LEADLESS CHIP CARR | OTH 42 | -55 to 125C | 217.55 | 184.92 | N |
| AD7874SQ Production | CERDIP GLASS SEAL | OTH 12 | -55 to 125C | 169.23 | 143.84 | N |
