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| 型號(hào)： | AD7294BCPZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 46/49頁(yè) |
| 文件大小： | 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 |
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Data Sheet
AD7294
Rev. H | Page 5 of 48
SPECIFICATIONS
DAC SPECIFICATIONS
AVDD = DVDD = 4.5 V to 5.5 V, AGND = DGND = 0 V, internal 2.5 V reference; VDRIVE = 2.7 V to 5.5 V; TA =40°C to +105°C, unless
otherwise noted. DAC OUTV+ AB and DAC OUTV+ CD = 4.5 V to 16.5 V, OFFSET IN x is floating, therefore, the DAC output
span = 0 V to 5 V.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
ACCURACY
Resolution
12
Bits
Relative Accuracy (INL)
±1
±3
LSB
Differential Nonlinearity (DNL)
±0.3
±1
LSB
Guaranteed monotonic
Zero-Scale Error
2.5
8
mV
Full-Scale Error of DAC and
Output Amplifier
15.51
mV
DAC OUTV+ = 5.0 V
Full-Scale Error of DAC
2
mV
DAC OUTV+ = 15.0 V
Offset Error
±8.575
mV
Measured in the linear region, T
A = 40°C to +105°C
±2
mV
Measured in the linear region, T
A = 25°C
Offset Error Temperature
Coefficient
±5
ppm/°C
Gain Error
±0.025
±0.155
% FSR
Gain Temperature Coefficient
±5
ppm/°C
DAC OUTPUT CHARACTERISTICS
Output Voltage Span
0
2 × V
REF
V
0 V to 5 V for a 2.5 V reference
Output Voltage Offset
0
10
V
The output voltage span can be positioned in the 0 V to
15 V range; if the OFFSET IN x is left floating, the offset
pin = 2/3 × V
REF , giving an output of 0 V to 2 × VREF
Offset Input Pin Range
0
5
V
OUT = 3 VOFFSET 2 × VREF + VDAC
DC Input Impedance2
75
k
100 k to V
REF, and 200 k to AGND, see Figure 48
Output Voltage Settling Time2
8
s
1/4 to 3/4 change within 1/2 LSB, measured from last
SCL edge
Slew Rate2
1.1
V/s
Short-Circuit Current2
40
mA
Full-scale current shorted to ground
Load Current2
±10
mA
Source and/or sink within 200 mV of supply
Capacitive Load Stability2
10
nF
R
L = ∞
DC Output Impedance2
1
REFERENCE
Reference Output Voltage
2.49
2.5
2.51
V
±0.4% maximum @ 25°C, AV
DD = DVDD = 4.5 V to 5.5 V
Reference Input Voltage Range
0
AV
DD 2
V
Input Current
100
125
A
V
REF = 2.5 V
Input Capacitance2
20
pF
V
REF Output Impedance
25
Reference Temperature
Coefficient
10
25
ppm/°C
1 This value indicates that the DAC output amplifiers can output voltages 15.5 mV below the DAC OUTV+ supply. If higher DAC OUTV+ supply voltages are used, the
full-scale error of the DAC is typically 2 mV with no load.
2 Samples are tested during initial release to ensure compliance; they are not subject to production testing.
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