AD7294 Analog Devices, AD7294 Datasheet - Page 7

• Manufacturer Part Number: AD7294
• Description: 12-Bit Monitor and Control System with Multichannel ADC, DACs, Temperature Sensor, and Current Sense
• Manufacturer: Analog Devices

Specifications of AD7294

• Resolution (bits): 12bit
• # Chan: 9
• Sample Rate: 200kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (Vref) p-p,2 V p-p,Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
Parameter
TEMPERATURE SENSOR—INTERNAL
TEMPERATURE SENSOR—EXTERNAL
CURRENT SENSE
REFERENCE
1
2
3
4
See the Terminology section for more details.
Sampled during initial release to ensure compliance, not subject to production testing.
V
V
IN+
IN−
Update Rate
Medium Level Output Current Source
Maximum Series Resistance (R
Maximum Parallel Capacitance (C
Gain
V
Operating Range
Accuracy
Resolution
Operating Range
Accuracy
Resolution
Low Level Output Current Source
High Level Output Current Source
V
RS(+)/RS(−) Input Bias Current
CMRR/PSRR
Offset Error
Offset Drift
Amplifier Peak-To-Peak Noise
Reference Output Voltage
Reference Input Voltage Range
DC Leakage Current
V
Input Capacitance
Reference Temperature Coefficient
PP
PP
REF
or V
= 0 V for specified performance. For full input range on V
External Diode
External Diode
Supply Current
Supply Range
Output Impedance
IN−
must remain within GND/V
2
2
2
2
2
2
DD
S
) for
.
P
2
2
) for
2
Min
−40
−55
AV
12.4375
2.49
0.1
1
DD
IN−
, see Figure 40.
Typ
0.25
5
0.25
8
32
128
12.5
25
80
±50
1
400
0.18
25
20
10
Rev. H | Page 7 of 48
Max
+105
±2
±2.5
+150
±2
100
1
59.4
12.5625
32
±340
0.25
2.51
4.1
AV
±2
25
DD
− 2
Unit
°C
°C
°C
°C
ms
°C
°C
°C
µA
µA
µA
Ω
nF
V
µA
dB
µV
µV/°C
µV
mA
V
V
μA
Ω
pF
ppm/°C
Test Conditions/Comments
Internal temperature sensor, T
Internal temperature sensor, T
LSB size
External transistor is 2N3906
Limited by external diode
T
LSB size
For < ±0.5°C additional error, C
R
V
Gain of 12.5 gives a gain error = 0.5% maximum;
delivers ±200 mV range with +2.5 V reference
Inputs shorted to V
Referred to input
V
±0.2% maximum at 25°C only
For four uncommitted ADCs
For current sense
A
S
PP
PP
= 0, see Figure 30
= T
= AV
= 59.4 V
DIODE
DD
= −40°C to +105°C
to 59.4 V
PP
A
A
P
= −30°C to +90°C
= −40°C to +105°C
= 0, see Figure 31
AD7294