AD7760 Analog Devices, AD7760 Datasheet - Page 10

• Manufacturer Part Number: AD7760
• Description: 2.5 MSPS, 24-Bit, 100 dB Sigma-Delta ADC with On-Chip Buffer
• Manufacturer: Analog Devices

Specifications of AD7760

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: 40MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 4 V p-p,6.5 V p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: QFP

AD7760
Pin No.
30
17
45 to 52,
54 to 61
37
3
2
36
39
38
40
Mnemonic
DECAPB
R
DB15:DB8,
DB7:DB0
RESET
MCLK
MCLKGND
SYNC
RD/WR
DRDY
CS
BIAS
Description
Decoupling Pin. A 33 pF capacitor must be inserted between this pin and AGND3.
Bias Current Setting Pin. A resistor must be inserted between this pin and AGND. For more details, see the
Bias Resistor Selection section.
16-Bit Bidirectional Data Bus. These are three-state pins that are controlled by the CS pin and the RD/WR
pin. The operating voltage for these pins is determined by the V
Output Mode and AD7760 Interface sections for more details.
A falling edge on this pin resets all internal digital circuitry and powers down the part. Holding this pin low
keeps the AD7760 in a reset state.
Master Clock Input. A low jitter, buffered digital clock must be applied to this pin. The output data rate
depends on the frequency of this clock. See the Clocking the AD7760 section for more details.
Master Clock Ground Sensing Pin.
Synchronization Input. A falling edge on this pin resets the internal filter. This can be used to synchronize
multiple devices in a system. See the Synchronization section for more details.
Read/Write Input. This pin, in conjunction with the chip select pin, is used to read and write data to and
from the AD7760. If this pin is low when CS is low, a read takes place. If this pin is high when CS is low, a
write occurs. See the Modulator Data Output Mode and AD7760 Interface sections for more details.
Data Ready Output. Each time new conversion data is available, an active low pulse, ½ ICLK period wide, is
produced on this pin. See the Modulator Data Output Mode and AD7760 Interface sections for more details.
Chip Select Input. Used in conjunction with the RD/WR pin to read and write data from and to the AD7760.
See the Modulator Data Output Mode and AD7760 Interface sections for more details.
Rev. A | Page 10 of 36
DRIVE
voltage. See the Modulator Data