AD7791 Analog Devices, AD7791 Datasheet - Page 4

• Manufacturer Part Number: AD7791
• Description: 24-Bit, Single-Channel, Ultra Low Power, Sigma Delta A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7791

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7791
SPECIFICATIONS (continued)
Parameter
LOGIC INPUTS
LOGIC OUTPUTS
POWER REQUIREMENTS
5
6
Digital inputs equal to V
The current consumption can be further reduced by using the ADC in one of the low power modes (see Table 14).
REFERENCE INPUT (continued)
Normal Mode Rejection
Common Mode Rejection
All Inputs Except SCLK
Input Currents
Input Capacitance
V
V
V
V
Floating-State Leakage Current
Floating-State Output Capacitance
Data Output Coding
Power Supply Voltage
Power Supply Currents
OH
OL
OH
OL
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
@ DC
@ 50 Hz, 60 Hz
V
V
SCLK Only (Schmitt-Triggered Input)
V
V
V
V
V
V
V
I
I
DD
DD
, Output Low Voltage
, Output Low Voltage
, Output High Voltage
, Output High Voltage
INL
INH
T
T
T
T
T
T
DD
(+)
(–)
(+) – V
(+)
(–)
(+) - V
Current
(Power-Down Mode)
, Input Low Voltage
, Input High Voltage
– GND
T
T
(–)
(–)
6
DD
or GND.
5
2
2
2
2
2
2
2
1
AD7791B
65
80
80
100
110
0.8
0.4
2.0
1.4/2
0.8/1.4
0.3/0.85
0.9/2
0.4/1.1
0.3/0.85
±1
10
V
0.4
4
0.4
±1
10
Offset Binary
2.5/5.25
75
145
80
160
1
DD
– 0.6
Rev. 0 | Page 4 of 20
Unit
dB min
dB min
dB min
dB typ
dB typ
V max
V max
V min
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
µA max
pF typ
V min
V max
V min
V max
µA max
pF typ
V min/max
µA max
µA max
µA max
µA max
µA max
Test Conditions/Comments
73 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[2:0] = 100
90 dB typ, 50 ± 1 Hz, FS[2:0] = 101
90 dB typ, 60 ± 1 Hz, FS[2:0] = 011
AIN = 1 V
FS[2:0] = 100
50 ± 1 Hz (FS[2:0] = 101
V
V
V
V
V
V
V
V
V
V
All Digital Inputs
V
V
V
V
65 µA typ, V
130 µA typ, V
73 µA typ, V
145 µA typ, V
DD
DD
DD
DD
DD
DD
DD
DD
DD
IN
DD
DD
DD
DD
= V
= 5 V
= 3 V
= 3 V or 5 V
= 5 V
= 5 V
= 5 V
= 3 V
= 3 V
= 3 V
= 3 V, I
= 3 V, I
= 5 V, I
= 5 V, I
DD
or GND
SOURCE
SINK
SOURCE
SINK
DD
DD
4
DD
DD
= 100 µA
= 1.6 mA
= 3.6 V, Unbuffered Mode
= 5.25 V, Unbuffered Mode
= 3.6 V, Buffered Mode
= 5.25 V, Buffered Mode
= 100 µA
= 200 µA
4
), 60 ± 1 Hz (FS[2:0] = 011
4
4
4
4
)