AD7798 Series

3-Channel, Low Noise, Low Power, 16-Bit, Sigma Delta ADC with On-Chip In-Amp

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

3-Channel, Low Noise, Low Power, 16-Bit, Sigma Delta ADC with On-Chip In-Amp

Part	Reference Type	Mounting Type	Operating Temperature (Min)	Operating Temperature (Max)	Number of A/D Converters	Sampling Rate (Per Second)	Number of Bits	Voltage - Supply, Analog (Max)	Voltage - Supply, Analog (Min)	Data Interface	Voltage - Supply, Digital (Min)	Voltage - Supply, Digital (Max)	Input Type	Architecture	Configuration	Package Length	Package Name	Package Width	Number of Inputs	Supplied Contents	Contents	Input Range	Power (Typ)	Utilized IC / Part
Analog Devices Inc./Maxim Integrated AD7798BRUZ	External	Surface Mount	-40 °C	105 °C	1 count	470 Hz	16 bits	5.25 V	2.7 V	DSP SPI	2.7 V	5.25 V	Differential	Sigma-Delta	MUX-ADC	0.173 in	16-TSSOP	4.4 mm	3
Analog Devices Inc./Maxim Integrated EVAL-AD7798EBZ					1 count	470 Hz	16 bits			Serial										Board(s) Cable(s)	Board Cable	±VREF/gain	2.5 mW	AD7798
Analog Devices Inc./Maxim Integrated AD7798BRUZ-REEL	External	Surface Mount	-40 °C	105 °C	1 count	470 Hz	16 bits	5.25 V	2.7 V	DSP SPI	2.7 V	5.25 V	Differential	Sigma-Delta	MUX-ADC	0.173 in	16-TSSOP	4.4 mm	3

Catalog

3-Channel, Low Noise, Low Power, 16-Bit, Sigma Delta ADC with On-Chip In-Amp

Description

The AD7798 /AD7799are low power, low noise, complete analog front ends for high precision measurement applications. The AD7798 / AD7799 contains a low noise, 16-/24-bit Σ-Δ ADC with three differential analog inputs. The on-chip, low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC. With a gain setting of 64, the rms noise is 27 nV for the AD7799 and 40 nV for the AD7798 when the update rate equals 4.17 Hz.On-chip features include a low-side power switch, reference detect, programmable digital output pins, burnout currents, and an internal clock oscillator. The output data rate from the part is software-programmable and can be varied from 4.17 Hz to 470 Hz.The part operates with a power supply from 2.7 V to 5.25 V. The AD7798 consumes a current of 300 μA typical, whereas the AD7799 consumes 380 μA typical. Both devices are housed in a 16-lead TSSOP package.APPLICATIONSWeigh scalesPressure measurementStrain gauge transducersGas analysisIndustrial process controlInstrumentationPortable instrumentationBlood analysisSmart transmittersLiquid/gas chromotography 6-digit DVM