Conversor A/d 16 Sigma Delta Spi Ad7790 Msop10 Itytarg

Number of Bits 16
Sampling Rate (Per Second) 120
Number of Inputs 1
Input Type Differential
Data Interface SPI, DSP
Configuration ADC
Ratio - S/H:ADC -
Number of A/D Converters 1
Architecture Sigma-Delta
Reference Type External
Voltage - Supply, Analog 2.5V ~ 5.25V
Voltage - Supply, Digital 2.5V ~ 5.25V
Features PGA
Operating Temperature -40°C ~ 105°C
Package / Case 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package 10-MSOP
Mounting Type Surface Mount

Datasheet

FEATURES
Power
Supply: 2.5 V to 5.25 V operation
Normal: 75 μA maximum
Power-down: 1 μA maximum
RMS noise: 1.1 μV at 9.5 Hz update rate
16-bit p-p resolution
Integral nonlinearity: 3.5 ppm typical
Simultaneous 50 Hz and 60 Hz rejection
Internal clock oscillator
Programmable gain amplifier
Rail-to-rail input buffer
VDD monitor channel
Temperature range: –40°C to +105°C
10-lead MSOP
INTERFACE
3-wire serial
SPI®, QSPI™, MICROWIRE™, and DSP compatible
Schmitt trigger on SCLK
APPLICATIONS
Smart transmitters
Battery applications
Portable instrumentation
Sensor measurement
Temperature measurement
Pressure measurement
Weigh scales
4 to 20 mA loops

GENERAL DESCRIPTION
The AD7790 is a low power, complete analog front end for
low frequency measurement applications. It contains a low
noise 16-bit ∑-Δ ADC with one differential input that can be
buffered or unbuffered along with a digital PGA, which allows
gains of 1, 2, 4, and 8.
The device operates from an internal clock. Therefore, the user
does not have to supply a clock source to the device. The output
data rate from the part is software programmable and can be
varied from 9.5 Hz to 120 Hz, with the rms noise equal to
1.1 μV at the lower update rate. The internal clock frequency
can be divided by a factor of 2, 4, or 8, which leads to a reduction in the current consumption. The update rate, cutoff
frequency, and settling time will scale with the clock frequency.
The part operates with a power supply from 2.5 V to 5.25 V.
When operating from a 3 V supply, the power dissipation for
the part is 225 μW maximum. It is housed in a 10-lead MSOP.