The AD7927 is a 12-bit, high speed, low power, 8-channel, successive approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 200 kSPS. The part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 8 MHz.
The conversion process and data acquisition are controlled using CS and the serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. There are no pipeline delays associated with the part.
The AD7927 uses advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7927 consumes 1.2 mA maximum with 3 V supplies; with 5 V supplies, the current consumption is 1.5 mA maximum.
Through the configuration of the control register, the analog input range for the part can be selected as 0 V to REFIN or 0 V to 2 × REFIN, with either straight binary or twos complement output coding. The AD7927 features eight single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequentially.
The conversion time for the AD7927 is determined by the SCLK frequency, as this is also used as the master clock to control the conversion. The conversion time may be as short as 800 ns with a 20 MHz SCLK.
Features and Benefits
| Analog to Digital Converters |
Document | note |
AD7927: 8-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 20-Lead TSSOP Data Sheet (Rev. D) | PDF 1418 kB |
Document | note |
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog | PDF 1885 kB |
Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
---|---|---|---|---|---|---|
AD7927BRU Production | 20 ld TSSOP | OTH 75 | -40 to 85C | 0 | 0 | N |
AD7927BRUZ Production | 20 ld TSSOP | OTH 75 | -40 to 85C | 3.33 | 2.83 | Y |
AD7927BRUZ-REEL Production | 20 ld TSSOP | REEL 2500 | -40 to 85C | 0 | 2.83 | Y |
AD7927BRUZ-REEL7 Production | 20 ld TSSOP | REEL 1000 | -40 to 85C | 0 | 2.83 | Y |
AD7927WYRUZ-REEL7 Production | 20 ld TSSOP | REEL 1000 | -40 to 125C | 0 | 3.02 | Y |