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參數(shù)資料
| 型號： | AD7898AR-10 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大小： | 184K |
| 代理商： | AD7898AR-10 |
PERFORMANCE CURVES
TPC 1 shows a typical FFT plot for the AD7898 at 220 kSPS
sampling rate with a 30 kHz input frequency while operating in
Mode 0.
S
–15
–35
–55
–95
–115
5
–75
FREQUENCY – kHz
100
80
60
40
20
0
8192 POINT FFT
f
SAMPLE
= 220kSPS
f
SINAD = 71.823dB
THD = –90.28dB
SFDR = –91.467dB
TPC 1. Mode 0 Dynamic Performance
TPC 2 shows a typical FFT plot for the AD7898 at 220 kSPS
sampling rate with a 30 kHz input frequency while operating in
Mode 1.
S
–
–
15
–
35
–
55
–
95
–
115
5
–
75
FREQUENCY
–
kHz
100
80
60
40
20
0
8192 POINT FFT
f
SAMPLE
= 220kSPS
f
SINAD = 71.779dB
THD =
–
88.337dB
SFDR =
–
89.639dB
TPC 2. Mode 1 Dynamic Performance
TPC 3 shows the Power Supply Rejection Ratio versus supply
frequency for the AD7898. The power supply rejection ratio is
defined as the ratio of the power in the ADC output at full-scale
frequency f, to the power of a 100 mV sine wave applied to the
ADC V
DD
supply of frequency f
S
.
PSRR
(
dB
) = 10 log (
Pf
/
Pfs
)
Pf
= Power at frequency
f
in ADC output,
Pfs
= power at fre-
quency
fs
coupled on to the ADC V
DD
supply input. Here a
100 mV peak-to-peak sine wave is coupled onto the V
DD
supply.
100 nF decoupling was used on the supply.
INPUT FREQUENCY
–
kHz
P
–
–
40
–
50
–
70
–
80
80
60
40
20
10
0
–
20
–
30
–
60
70
50
30
TPC 3. PSRR vs. Supply Ripple Frequency
TPC 4 shows a graph of effective number of bits versus input
frequency while sampling at 220 kSPS.
INPUT FREQUENCY
–
kHz
E
11.7
11.6
11.4
11.2
100
80
40
20
0
11.9
11.8
11.5
60
11.3
TPC 4. Effective Number of Bits vs. Input Frequency at
220 kSPS
The effective number of bits for a device can be calculated from
its measured Signal to (Noise + Distortion) Ratio (see Termi-
nology section). TPC 4 shows a typical plot of effective number
of bits versus frequency for the AD7898 from dc to f
SAMPLE/2
.
The sampling frequency is 220 kSPS.
The formula for Signal to (Noise + Distortion) Ratio is related
to the resolution or number of bits in the converter. Rewriting
the formula, below, gives a measure of performance expressed in
effective number of bits (N):
N = (SNR – 1.76)/6.02
where
SNR
is Signal to (Noise + Distortion) Ratio.
–7–
REV. 0
Typical Performance Characteristics
–
AD7898
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD7898AR-10 | 制造商:Analog Devices 功能描述:A/D CONVERTER (A-D) IC ((NW)) |
| AD7898AR-10REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 220ksps 12-bit Serial 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:5V 12-BIT SERIAL ADC IN 8-PIN PKG I.C. - Tape and Reel |
| AD7898AR-10REEL7 | 功能描述:IC ADC 12BIT SRL HS 5V 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| AD7898AR-3 | 功能描述:IC ADC 12BIT SRL HS 5V 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7898AR-3REEL | 功能描述:IC ADC 12BIT SRL HS 5V 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
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