參數(shù)資料
型號： AD9269BCPZ-20
廠商： Analog Devices Inc
文件頁數(shù)： 13/40頁
文件大?。?/td> 0K
描述： IC ADC 16BIT SER 2CH 64LFCSP
特色產(chǎn)品： AD9269/65 Low-Power, High-Speed 16-Bit, 1.8V ADCs
標(biāo)準(zhǔn)包裝： 1
位數(shù)： 16
采樣率（每秒）： 20M
數(shù)據(jù)接口： 串行，SPI?
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 102mW
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： 64-VFQFN 裸露焊盤，CSP
供應(yīng)商設(shè)備封裝： 64-LFCSP-VQ（9x9）
包裝： 托盤
輸入數(shù)目和類型： 4 個單端，單極；4 個單端，雙極；2 個差分，單極；2 個差分，雙極
AD9269
Rev. 0 | Page 20 of 40
Input Common Mode
The analog inputs of the AD9269 are not internally dc-biased.
Therefore, in ac-coupled applications, the user must provide a dc
bias externally. Setting the device so that VCM = AVDD/2 is
recommended for optimum performance, but the device can
function over a wider range with reasonable performance, as
shown in Figure 39.
100
95
90
85
80
75
70
65
60
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
S
NR/
S
F
DR
(
d
BF
S
/d
B
c)
INPUT COMMON-MODE VOLTAGE (V)
08
53
8-
0
49
SFDR (dBc)
SNR (dBFS)
Figure 39. SNR/SFDR vs. Input Common-Mode Voltage,
fIN = 32.5 MHz, fS = 80 MSPS
An on-board, common-mode voltage reference is included in the
design and is available from the VCM pin. The VCM pin must
be decoupled to ground by a 0.1 μF capacitor, as described in
Differential Input Configurations
Optimum performance is achieved while driving the AD9269 in a
differential input configuration. For baseband applications, the
AD8138, ADA4937-2, and ADA4938-2 differential drivers provide
excellent performance and a flexible interface to the ADC.
The output common-mode voltage of the ADA4938-2 is easily
set with the VCM pin of the AD9269 (see Figure 40), and the
driver can be configured in a Sallen-Key filter topology to
provide band limiting of the input signal.
AVDD
VIN
76.8
120
0.1F
33
33
10pF
200
200
90
ADA4938-2
ADC
VIN–x
VIN+x
VCM
08
53
8-
00
7
Figure 40. Differential Input Configuration Using the ADA4938-2
For baseband applications below ~10 MHz where SNR is a key
parameter, differential transformer-coupling is the recommended
input configuration (see Figure 41). To bias the analog input, the
VCM voltage can be connected to the center tap of the secondary
winding of the transformer.
2V p-p
49.9
0.1F
R
C
ADC
VCM
VIN+x
VIN–x
08
53
8-
0
08
Figure 41. Differential Transformer-Coupled Configuration
The signal characteristics must be considered when selecting
a transformer. Most RF transformers saturate at frequencies below
a few megahertz (MHz). Excessive signal power can also cause
core saturation, which leads to distortion.
At input frequencies in the second Nyquist zone and above, the
noise performance of most amplifiers is not adequate to achieve
the true SNR performance of the AD9269. For applications above
~10 MHz where SNR is a key parameter, differential double balun
coupling is the recommended input configuration (see Figure 42).
An alternative to using a transformer-coupled input at frequencies
in the second Nyquist zone is to use the AD8352 differential driver
(see Figure 43). Refer to the AD8352 data sheet for more
information.
ADC
R
0.1F
2V p-p
VCM
C
R
0.1F
S
0.1F
25
25
S
PA
P
0
85
38
-01
0
VIN+x
VIN–x
Figure 42. Differential Double Balun Input Configuration
AD8352
0
0
CD
RD
RG
0.1F
16
1
2
3
4
5
11
0.1F
10
14
0.1F
8, 13
VCC
200
200
ANALOG INPUT
R
C
ADC
VCM
VIN+x
VIN–x
08
53
8-
0
11
Figure 43. Differential Input Configuration Using the AD8352
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參數(shù)描述
AD9269BCPZ-40 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16 Bit 40 Msps low pwr dual ADC RoHS:否 制造商:Analog Devices 通道數(shù)量: 結(jié)構(gòu): 轉(zhuǎn)換速率: 分辨率: 輸入類型: 信噪比: 接口類型: 工作電源電壓: 最大工作溫度: 安裝風(fēng)格: 封裝 / 箱體:
AD9269BCPZ-65 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16 Bit 65 Msps low pwr dual ADC RoHS:否 制造商:Analog Devices 通道數(shù)量: 結(jié)構(gòu): 轉(zhuǎn)換速率: 分辨率: 輸入類型: 信噪比: 接口類型: 工作電源電壓: 最大工作溫度: 安裝風(fēng)格: 封裝 / 箱體:
AD9269BCPZ-80 制造商:Analog Devices 功能描述:ADC Dual Pipelined 80Msps 16-bit Parallel/Serial (3-Wire, SPI) 64-Pin LFCSP EP 制造商:Analog Devices 功能描述:16 BIT 80 MSPS LOW PWR DUAL ADC - Trays 制造商:Analog Devices 功能描述:ADC Dual Pipelined 80MSPS 16-Bit Parallel/Serial (3-Wire, SPI) 64-Pin LFCSP EP Tray 制造商:Analog Devices 功能描述:IC ADC 16BIT 80MSPS SPI LFCSP-64 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC 16 Bit 80 Msps low pwr dual ADC 制造商:Analog Devices 功能描述:IC, ADC, 16BIT, 80MSPS, SPI, LFCSP-64; Resolution (Bits):16bit; Sampling Rate:80MSPS; Supply Voltage Type:Single; Supply Voltage Min:1.7V; Supply Voltage Max:1.9V; Supply Current:113mA; Digital IC Case Style:CSP; No. of Pins:64 ;RoHS Compliant: Yes 制造商:Analog Devices 功能描述:CONVERTER - ADC
AD9269BCPZRL7-20 功能描述:IC ADC 16BIT 20MSPS DL 64LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極
AD9269BCPZRL7-40 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16 Bit 40 Msps low pwr dual ADC RoHS:否 制造商:Analog Devices 通道數(shù)量: 結(jié)構(gòu): 轉(zhuǎn)換速率: 分辨率: 輸入類型: 信噪比: 接口類型: 工作電源電壓: 最大工作溫度: 安裝風(fēng)格: 封裝 / 箱體:
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