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參數(shù)資料
| 型號(hào)： | AD7898ARZ-10REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT SRL HS 5V 8-SOIC |
| 產(chǎn)品變化通告： | Product Discontinuance 27/Oct/2011 |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 220k |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 22.5mW |
| 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： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個(gè)單端，雙極 |
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.
SNR
–
dB
–15
–35
–55
–95
–115
5
–75
FREQUENCY – kHz
100
80
60
40
20
0
8192 POINT FFT
fSAMPLE = 220kSPS
fIN = 30kHz
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.
SNR
–
dB
–15
–35
–55
–95
–115
5
–75
FREQUENCY – kHz
100
80
60
40
20
0
8192 POINT FFT
fSAMPLE = 220kSPS
fIN = 30kHz
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 VDD supply of frequency fS.
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 VDD supply input. Here a
100 mV peak-to-peak sine wave is coupled onto the VDD supply.
100 nF decoupling was used on the supply.
INPUT FREQUENCY – kHz
PSRR
–
dB
–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
EFFECTIVE
NUMBER
OF
BITS 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 fSAMPLE/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. A
Typical Performance Characteristics–AD7898
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| AD7898ARZ-3 | 功能描述:IC ADC 12BIT SRL HS 5V 8SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個(gè)單端，單極；2 個(gè)差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
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