参数资料
型号: AD7938BSUZ-6
厂商: Analog Devices Inc
文件页数: 23/32页
文件大小: 0K
描述: IC ADC 12BIT 8CHAN 32TQFP
标准包装: 1
位数: 12
采样率(每秒): 625k
数据接口: 并联
转换器数目: 1
功率耗散(最大): 7.5mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-TQFP
供应商设备封装: 32-TQFP(7x7)
包装: 托盘
输入数目和类型: 8 个单端,单极;4 个差分,单极;4 个伪差分,单极;7 伪差分,单极
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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