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參數(shù)資料
型號: AD7938BSUZ-6
廠商: Analog Devices Inc
文件頁數(shù): 23/32頁
文件大?。?/td> 0K
描述: IC ADC 12BIT 8CHAN 32TQFP
標(biāo)準(zhǔn)包裝: 1
位數(shù): 12
采樣率(每秒): 625k
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 7.5mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP
供應(yīng)商設(shè)備封裝: 32-TQFP(7x7)
包裝: 托盤
輸入數(shù)目和類型: 8 個單端,單極;4 個差分,單極;4 個偽差分,單極;7 偽差分,單極
配用: EVAL-AD7938CBZ-ND - EVAL BOARD FOR AD7938
Data Sheet
AD7938-6
Rev. C | Page 3 of 32
SPECIFICATIONS
VDD = VDRIVE = 2.7 V to 5.25 V, internal/external VREF = 2.5 V, unless otherwise noted; fCLKIN = 10 MHz, fSAMPLE = 625 kSPS; TA = TMIN to
TMAX1, unless otherwise noted.
Table 2.
Parameter
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 50 kHz sine wave
Signal-to-Noise + Distortion (SINAD)2
69
dB min
Differential mode
67
dB min
Single-ended mode
Signal-to-Noise Ratio (SNR)2
71
dB min
Differential mode
69
dB min
Single-ended mode
Total Harmonic Distortion (THD)2
73
dB max
85 dB typ, differential mode
69.5
dB max
80 dB typ, single-ended mode
Peak Harmonic or Spurious Noise (SFDR)2
72
dB max
82 dB typ
Intermodulation Distortion (IMD)2
fa = 30 kHz, fb = 50 kHz
Second-Order Terms
86
dB typ
Third-Order Terms
90
dB typ
Channel-to-Channel Isolation
85
dB typ
fIN = 50 kHz, fNOISE = 300 kHz
Aperture Delay2
5
ns typ
Aperture Jitter2
72
ps typ
Full Power Bandwidth2
50
MHz typ
@ 3 dB
10
MHz typ
@ 0.1 dB
DC ACCURACY
Resolution
12
Bits
Integral Nonlinearity2
±1
LSB max
Differential mode
±1.5
LSB max
Single-ended mode
Differential Nonlinearity2
Differential Mode
±0.95
LSB max
Guaranteed no missed codes to 12 bits
Single-Ended Mode
0.95/+1.5
LSB max
Guaranteed no missed codes to 12 bits
Single-Ended and Pseudo Differential Input
Straight binary output coding
Offset Error2
±12
LSB max
Offset Error Match2
±3
LSB max
Gain Error2
±3
LSB max
Gain Error Match2
±2
LSB max
Fully Differential Input
Twos complement output coding
Positive Gain Error2
±3
LSB max
Positive Gain Error Match2
±1.5
LSB typ
Zero-Code Error2
±9.5
LSB max
Zero-Code Error Match2
±1
LSB typ
Negative Gain Error2
±3
LSB max
Negative Gain Error Match2
±1.5
LSB typ
ANALOG INPUT
Single-Ended Input Range
0 to VREF
V
RANGE bit = 0
0 to 2 × VREF
V
RANGE bit = 1
Pseudo Differential Input Range:
VIN+
0 to VREF
V
RANGE bit = 0
0 to 2 × VREF
V
RANGE bit = 1
VIN
0.3 to +0.7
V typ
VDD = 3 V
0.3 to +1.8
V typ
VDD = 5 V
Fully Differential Input Range
VIN+ and VIN
VCM ± VREF/2
V
VCM = common-mode voltage3 = VREF/2
VIN+ and VIN
VCM ± VREF
V
VCM = VREF, VIN+ or VIN must remain within GND/VDD
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