AD7291 Analog Devices, AD7291 Datasheet - Page 4

• Manufacturer Part Number: AD7291
• Description: 8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
• Manufacturer: Analog Devices

Specifications of AD7291

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 22.2kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP

AD7291
Parameter
LOGIC OUTPUTS
TEMPERATURE SENSOR—INTERNAL
CONVERSION RATE
POWER REQUIREMENTS
1
2
3
4
5
6
7
8
All specifications expressed in decibels are referred to full-scale input, FSR, and tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
See the Terminology section.
Sample tested during initial release to ensure compliance.
Refers to Pin
A correction factor may be required on the temperature sensor results when using an external V
Sampled during initial release to ensure compliance; not subject to production testing.
I
I
TOTAL
TOTAL
Output High Voltage, V
Operating Range
Accuracy
Resolution
Conversion Time
Autocycle Update Rate
Throughput Rate
V
V
I
Power Dissipation
TOTAL
DD
DRIVE
Output Low Voltage, V
Floating State Leakage Current
Floating State Output Capacitance
Normal Mode (Operational)
Normal Mode (Static)
Full Power-Down Mode
Normal Mode (Operational)
Normal Mode (Static)
Full Power-Down Mode
is the total current flowing in V
and power dissipation are specified with V
7, 8
V
REF
specified for 25
8
OH
6
OL
o
C.
DD
and V
DRIVE
3
DD
.
= V
DRIVE
= 3.6 V, unless otherwise noted.
Min
V
V
−40
2.8
1.65
DRIVE
DRIVE
− 0.3
− 0.2
Rev. B | Page 4 of 28
Typ
±0.01
8
±1
±1
0.25
3.2
50
3
3
2.9
2.9
0.3
1.6
4.9
8.7
10.4
10.4
1.1
5.8
17.6
Max
0.4
0.6
±1
+125
±2
±3
22.22
3.6
3.6
3.5
3.3
1.6
4.5
12
10.5
12.6
11.9
5.8
16.2
43.2
REF
(see the Temperature Sensor Averaging section).
Unit
pF
μs
μs
V
V
V
V
μA
°C
°C
°C
°C
kSPS
V
V
mA
mA
μA
μA
μA
mW
mW
mW
μW
μW
μW
1
Digital inputs = 0 V or V
Test Conditions/Comments
V
V
I
I
T
T
LSB size
f
T
T
T
V
T
T
T
SINK
SINK
SCL
A
A
A
A
A
A
A
A
DRIVE
DRIVE
DD
= −40°C to +85°C
= 85°C to 125°C
= −40°C to +25°C
= >25°C to 85°C
= >85°C to 125°C
= −40°C to +25°C
= >25°C to 85°C
= >85°C to 125°C
= 400 kHz
= 3 V, V
= 3 mA
= 6 mA
< 1.8
≥ 1.8
DRIVE
= 3 V
Data Sheet
DRIVE