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參數(shù)資料
型號: AD7870BQ
廠商: Analog Devices Inc
文件頁數(shù): 23/28頁
文件大?。?/td> 0K
描述: IC ADC 12BIT SAMPLING 3V 24-CDIP
產(chǎn)品變化通告: Conversion Time Change
標(biāo)準(zhǔn)包裝: 1
位數(shù): 12
采樣率(每秒): 100k
數(shù)據(jù)接口: 串行,并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 95mW
電壓電源: 雙 ±
工作溫度: -25°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 24-CDIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 24-CDIP
包裝: 管件
輸入數(shù)目和類型: 1 個單端,雙極
AD7870/AD7875/AD7876
Rev. C | Page 4 of
28
Parameter
J, A
K, B
L, C
T
Units
Test Conditions/Comments
CONVERSION TIME
External Clock (fCLK = 2.5 MHz)
8
μs max
Internal Clock6
6.5/9
μs min/
μs max
POWER REQUIREMENTS
VDD
+5
V nom
±5% for specified performance
VSS
5
V nom
±5% for specified performance
IDD
13
mA max
Typically 8 mA
ISS
6
mA max
Typically 4 mA
Power Dissipation
95
mW max
Typically 60 mW
1 The temperature range for the J, K, and L versions is from 0°C to +70°C; for the A, B, and C versions is40°C to +85°C; and for the T version is 55°C to +125°C.
2 VIN (p-p) = ±3 V.
3 SNR calculation includes distortion and noise components.
4 Measured with respect to internal reference and includes bipolar offset error.
5 Sample tested @ +25°C to ensure compliance.
6 Conversion time specification for the AD7870A device with internal clock used is 8 μs/10 μs minimum/maximum.
AD7875/AD7876 SPECIFICATIONS
Table 2.
Parameter
AD7875/AD78761
Units
Test Conditions/Comments
K, B
L, C
T
DC ACCURACY
Resolution
12
Bits
Min Resolution for which No Missing
Codes Are Guaranteed
12
Bits
Integral Nonlinearity @ +25°C
±1
±1/2
±1
LSB max
TMIN to TMAX (AD7875 Only)
±1
LSB max
TMIN to TMAX (AD7876 Only)
±1
±1/2
±1
LSB max
Differential Nonlinearity
±1
±1.5/1.0
LSB max
Unipolar Offset Error (AD7875 Only)
±5
LSB max
Bipolar Zero Error (AD7876 Only)
±6
±2
±6
LSB max
Full-Scale Error at +25°C2
±8
LSB max
Typical full-scale error is ±1 LSB
Full-Scale TC2
±60
±35
±60
ppm/°C max
Typical TC is ±20 ppm/°C
Track-and-Hold Acquisition Time
2
μs max
DYNAMIC PERFORMANCE3 (AD7875
ONLY)
Signal-to-Noise Ratio4 (SNR)
@ +25°C
70
72
69
dB min
VIN = 10 kHz sine wave, fSAMPLE = 100 kHz
TMIN to TMAX
70
71
69
dB min
Typically 71.5 dB for 0 < VIN < 50 kHz
Total Harmonic Distortion (THD)
80
78
dB max
VIN = 10 kHz sine wave, fSAMPLE = 100 kHz
Typically 86 dB for 0 < VIN < 50 kHz
Peak Harmonic or Spurious Noise
80
78
dB max
VIN = 10 kHz, fSAMPLE = 100 kHz
Typically 86 dB for 0 < VIN < 50 kHz
Intermodulation Distortion (IMD)
Second Order Terms
80
78
dB max
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
Third Order Terms
80
78
dB max
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
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