AD7781 Analog Devices, AD7781 Datasheet - Page 4

• Manufacturer Part Number: AD7781
• Description: 20-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7781

• Resolution (bits): 20bit
• # Chan: 1
• Sample Rate: 16.7SPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip
• Ain Range: ± (Vref/Gain) ,10V p-p,78 mV p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOIC,SOP

AD7781
Parameter
INTERNAL CLOCK
LOGIC INPUTS
LOGIC OUTPUT (DOUT/RDY)
POWER REQUIREMENTS
1
2
3
Temperature range is −40°C to +105°C.
This specification is not production tested but is supported by characterization data at initial product release.
Digital inputs are equal to DV
Frequency
Duty Cycle
SCLK, FILTER, GAIN, PDRST
SCLK (Schmitt-Triggered Input)
Output High Voltage, V
Output Low Voltage, V
Floating-State Leakage Current
Floating-State Output Capacitance
Data Output Coding
Power Supply Voltage
Power Supply Currents
Input Low Voltage, V
Input High Voltage, V
Hysteresis
Input Currents
Input Capacitance
AV
DV
I
I
DD
DD
Gain = 1
Gain = 128 (B Grade)
Gain = 128 (C Grade)
DD
DD
Current
(Power-Down/Reset Mode)
to GND
to GND
2
3
OL
OH
INL
DD
INH
2
2
or GND.
2
64 − 3%
1.8
2.4
DV
4
Min
2.7
2.7
DD
− 0.6
Offset binary
Typ
50:50
100
140
±2
10
±2
10
115
130
300
350
330
420
10
Rev. 0 | Page 4 of 16
Max
64 + 3%
0.4
0.8
0.4
0.4
5.25
5.25
160
400
500
Unit
kHz
%
V
V
V
V
mV
mV
μA
pF
V
V
V
V
μA
pF
V
V
μA
μA
μA
μA
μA
μA
μA
Test Conditions/Comments
DV
DV
DV
DV
DV
DV
V
All digital inputs
DV
DV
DV
DV
AV
AV
AV
AV
AV
AV
IN
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
= DV
= 3 V
= 5 V
= 3 V
= 5 V
= 3 V
= 5 V
= 3 V
= 5 V
= 3 V
= 5 V
= 3 V
= 5 V
= 3 V, I
= 5 V, I
= 3 V, I
= 5 V, I
DD
or GND
SOURCE
SOURCE
SINK
SINK
= 100 μA
= 1.6 mA
= 100 μA
= 200 μA