參數(shù)資料
型號: AD7294BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 48/49頁
文件大?。?/td> 0K
描述: IC ADC 12BIT I2C/SRL 1M 56LFCSP
標(biāo)準(zhǔn)包裝: 1
類型: ADC,DAC
分辨率(位): 12 b
采樣率(每秒): 22.22k
數(shù)據(jù)接口: I²C,串行
電壓電源: 模擬和數(shù)字
電源電壓: 4.4 V ~ 5.5 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 56-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 56-LFCSP-VQ(8x8)
包裝: 托盤
Data Sheet
AD7294
Rev. H | Page 7 of 48
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
TEMPERATURE SENSOR—INTERNAL
Operating Range
40
+105
°C
Accuracy
±2
°C
Internal temperature sensor, T
A = 30°C to +90°C
±2.5
°C
Internal temperature sensor, T
A = 40°C to +105°C
Resolution
0.25
°C
LSB size
Update Rate
5
ms
TEMPERATURE SENSOR—EXTERNAL
External transistor is 2N3906
Operating Range
55
+150
°C
Limited by external diode
Accuracy
±2
°C
T
A = TDIODE = 40°C to +105°C
Resolution
0.25
°C
LSB size
Low Level Output Current Source2
8
A
Medium Level Output Current Source2
32
A
High Level Output Current Source2
128
A
Maximum Series Resistance (R
S) for
External Diode2
100
For < ±0.5°C additional error, C
P = 0, see Figure 31
Maximum Parallel Capacitance (C
P) for
External Diode2
1
nF
R
S = 0, see Figure 30
CURRENT SENSE
V
PP = AVDD to 59.4 V
V
PP Supply Range
AV
DD
59.4
V
Gain
12.4375
12.5
12.5625
Gain of 12.5 gives a gain error = 0.5% maximum;
delivers ±200 mV range with +2.5 V reference
RS(+)/RS() Input Bias Current
25
32
A
CMRR/PSRR2
80
dB
Inputs shorted to V
PP
Offset Error
±50
±340
V
Offset Drift
1
V/°C
Amplifier Peak-To-Peak Noise2
400
V
Referred to input
V
PP Supply Current
0.18
0.25
mA
V
PP = 59.4 V
REFERENCE
Reference Output Voltage
2.49
2.51
V
±0.2% maximum at 25°C only
Reference Input Voltage Range
0.1
4.1
V
For four uncommitted ADCs
1
AV
DD 2
For current sense
DC Leakage Current
±2
μA
V
REF Output Impedance
25
Input Capacitance2
20
pF
Reference Temperature Coefficient
10
25
ppm/°C
1 See the Terminology section for more details.
2 Sampled during initial release to ensure compliance, not subject to production testing.
3 V
IN+ or VIN must remain within GND/VDD.
4 V
IN = 0 V for specified performance. For full input range on VIN, see Figure 40.
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