AD7795 Analog Devices, AD7795 Datasheet - Page 6

• Manufacturer Part Number: AD7795
• Description: 6-Channel, Low Noise, Low Power, 16-Bit Sigma Delta ADC with On-Chip In-Amp and Reference
• Manufacturer: Analog Devices

Specifications of AD7795

• Resolution (bits): 16bit
• # Chan: 6
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7794/AD7795
Parameter
BIAS VOLTAGE GENERATOR
TEMPERATURE SENSOR
LOW-SIDE POWER SWITCH
DIGITAL OUTPUTS (P1 and P2)
INTERNAL/EXTERNAL CLOCK
LOGIC INPUTS
V
V
Accuracy
Sensitivity
R
Allowable Current
V
V
V
V
Internal Clock
External Clock
CS
SCLK (Schmitt-Triggered Input),
CLK, and DIN
Input Currents
Input Capacitance
ON
BIAS
BIAS
OH
OL
OH
OL
Frequency
Duty Cycle
Frequency
Duty Cycle
V
V
AD7794B/AD7795B
AD7794C
2
, Output Low Voltage
, Output Low Voltage
, Output High Voltage
, Output High Voltage
INL
INH
Generator Start-Up Time
V
V
V
V
V
V
V
V
V
V
V
V
, Input Low Voltage
, Input High Voltage
T
T
T
T
T
T
T
T
T
T
T
T
(+)
(−)
(+) to V
(+)
(−)
(+) to V
(+)
(−)
(+) to V
(+)
(−)
(+) to V
1
2
2
T
T
T
T
(−)
(−)
(−)
(−)
2
2
2
2
2
AD7794/AD7795
AV
±2
0.81
7
9
30
AV
0.4
4
0.4
64 ± 3%
50:50
64
45:55 to 55:45
0.8
0.4
2.0
1.4/2
0.8/1.7
0.1/0.17
0.9/2
0.4/1.35
0.06/0.13
1.35/2.05
0.8/1.9
0.1/0.19
0.9/2
0.4/1.35
0.06/0.15
±10
10
DD
DD
/2
− 0.6
Rev. D | Page 6 of 36
V nom
ms/nF typ
°C typ
mV/°C typ
Ω max
Ω max
mA max
V min
V max
V min
V max
kHz
min/max
% typ
kHz nom
% typ
V max
V max
V min
V min/max
V min/max
V min/max
V min/max
V min/max
V min/max
V min/max
V min/max
V min/max
V min/max
V min/max
V min/max
μA max
pF typ
Unit
Test Conditions/Comments
Dependent on the capacitance connected to AIN;
See Figure 11
Applies if user calibrates the temperature sensor
AV
AV
Continuous current
AV
AV
AV
AV
A 128 kHz external clock can be used if the divide-by-2
function is used (Bit CLK1 = CLK0 = 1)
Applies for external 64 kHz clock, a 128 kHz clock can
have a less stringent duty cycle
DV
DV
DV
DV
DV
DV
DV
DV
DV
DV
DV
DV
DV
DV
DV
V
All digital inputs
IN
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
= DV
= 5 V
= 3 V
= 3 V, I
= 3 V, I
= 5 V, I
= 5 V, I
= 5 V
= 3 V
= 3 V or 5 V
= 5 V
= 5 V
= 5 V
= 3 V
= 3 V
= 3 V
= 5 V
= 5 V
= 5 V
= 3 V
= 3 V
= 3 V
DD
or GND
SOURCE
SINK
SOURCE
SINK
= 100 μA
= 800 μA
= 100 μA
= 200 μA