参数资料
型号: EVAL-AD7725CBZ
厂商: Analog Devices Inc
文件页数: 6/28页
文件大小: 0K
描述: BOARD EVALUATION FOR AD7725
标准包装: 1
ADC 的数量: 1
位数: 16
采样率(每秒): 900k
数据接口: 串行,并联
输入范围: ±VREF
在以下条件下的电源(标准): 615mW @ 900kSPS
工作温度: -40°C ~ 85°C
已用 IC / 零件: AD7725
已供物品: 板,CD
相关产品: AD7725BSZ-ND - IC ADC 16BIT PROG 44MQFP
REV. A
–14–
AD7725–Typical Performance Characteristics
PERFORMANCE PLOTS
The following typical plots are generated using the digital filter shown in Figure 1.
(AV
DD = DVDD, TA = 25 C, CLKIN = 9.6 MHz, External Reference = 2.5 V, unless otherwise noted.)
ANALOG INPUT LEVEL – dB
110
100
30
–50
0
dB
–40
–30
–20
90
60
50
80
70
40
–10
SFDR
THD
SNR
INPUT FREQUENCY = 10kHz
TPC 1. SNR, THD, and SFDR vs. Analog Input
Level Relative to Full Scale
CLKIN FREQUENCY – MHz
120
60
0
14.4
dB
2.4
7.2
9.6
110
80
70
12
100
4.8
90
THD
SFDR
SNR
INPUT FREQUENCY = 10kHz
TPC 2. SNR, THD, and SFDR vs. Sampling Frequency
TEMPERATURE – C
110
105
70
–50
100
dB
–25
0
25
100
85
80
95
90
75
SFDR
THD
SNR
INPUT FREQUENCY = 10kHz
50
TPC 3. SNR, THD, and SFDR vs. Temperature
CODE
5000
0
32717
32726
FREQ
UENCY
OF
OCCURRENCE
32718
32721 32722
4000
2000
1000
32724
8192 SAMPLES TAKEN
VIN(+) = V IN(–)
MAXIMUM OUTPUT DATA RATE
3000
32719 32720
32723
32725
TPC 4. Histogram of Output Codes for a DC Input
FREQUENCY – kHz
0
–20
–160
0
300
PO
WER
LEVEL
RELA
TIVE
T
O
FULL
SCALE
dB
50
100
150
–40
–100
–120
–60
–80
–140
250
SNR = 84dB
THD = –93.85dB
SFDR = –98.47dB
AIN = 10kHz
MEASURED BW = 300kHz
200
TPC 5. 16k Point FFT
FREQUENCY – kHz
0
–20
–160
0
300
PO
WER
LEVEL
RELA
TIVE
T
O
FULL
SCALE
dB
50
100
150
–40
–100
–120
–60
–80
–140
250
SNR = 80.48dB
THD = –90.62dB
SFDR = –98dB
AIN = 10kHz
MEASURED BW = 450kHz
200
350
400
450
TPC 6. 16k Point FFT for a 108 Tap Low-Pass FIR
Filter Operating with a CLKIN Frequency of 14.4 MHz
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