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參數(shù)資料
| 型號(hào)： | AD9432BST-80 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 12-Bit, 80 MSPS/105 MSPS A/D Converter |
| 中文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP52 |
| 封裝： | PLASTIC, LQFP-52 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 431K |
| 代理商： | AD9432BST-80 |
REV. B
AD9432
–10–
The minimum guaranteed conversion rate of the AD9432 is
1 MSPS. At internal clock rates below 1 MSPS, dynamic
performance may degrade. Therefore, input clock rates below
1 MHz should be avoided.
Table I. Output Coding (VREF = +2.5 V) (Two’s Complement)
Code
AIN–
AIN
(V)
Digital Output
+2047
0
–1
–2048
1.000
0
–0.00049
–1.000
0111 1111 1111
0000 0000 0000
1111 1111 1111
1000 0000 0000
Using the AD8138 to Drive the AD9432
A new differential output op amp from Analog Devices, Inc.,
the AD8138 can be used to drive the AD9432 in dc-coupled
applications. The AD8138 was specifically designed for ADC
driver applications. Superior SNR performance is maintained up
to analog frequencies of 30 MHz. The AD8138 op amp provides
single-ended-to-differential conversion, providing for a low cost
option to transformer coupling for ac applications as well.
The circuit in Figure 26 was breadboarded and the measured
performance is shown in Figures 27 and 28. The figures shown
are for
±
5 V supplies at the AD8138—performance dropped by
about 1 dB–2 dB with a single +5 V supply at the AD8138.
Figure 27 shows SNR and SINAD for a –1 dBFS analog input
frequency varied from 2 MHz to 40 MHz with an encode rate of
105 MSPS. The measurements are for nominal conditions at
room temperature. Figure 28 shows the second and third har-
monic distortion performance under the same conditions.
The dc common-mode voltage for the AD8138 outputs can be
adjusted via input V
OCM
to provide the 3 V common-mode voltage
the AD9432 inputs require.
AD8138
500
500
50
50
22pF
AIN
AIN
AD9432
10pF
10pF
500
25
50
500
V
OCM
3k
2k
5V
VIN
0.1 F
Figure 26. AD8138/AD9432 Schematic
AIN MHz
0
d
20
60
64
40
63
62
61
60
SNR
SINAD
65
66
Figure 27. Measured SNR and SINAD (Encode = 105 MSPS)
AIN MHz
d
–
80
–
90
–
100
–
70
H2
H3
0
20
40
60
Figure 28. Measured Second and Third Order Harmonic
Distortion (Encode = 105 MSPS)
EVALUATION BOARD
The AD9432 evaluation board offers an easy way to test the
AD9432. It requires an analog signal, encode clock, and power
supplies as inputs. The clock is buffered on the board to provide
the clocks for an on-board DAC and latches. The digital outputs
and output clock are available at a standard 37-pin connector P7.
Power Connector
Power is supplied to the board via two detachable 4-pin power
strips P30, P40.
P40
P1
P2
P3
P4
VCC2 5 V/165 mA
GND
VCC
5 V/200 mA
GND
DAC Supply
ADC Analog Supply
P30
P5
P6
P7
P8
No Connect
No Connect
VD
GND
3.3 V /105 mA Latch, ADC Digital Output Supply
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| AD9432BSTZ105 | 制造商:Analog Devices 功能描述:AD9432BSTZ105 |
| AD9432BSTZ-105 | 功能描述:IC ADC 12BIT 105MSPS 52-LQFP 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 |
| AD9432BSTZ-105 | 制造商:Analog Devices 功能描述:IC 12-BIT ADC |
| AD9432BSTZ-1051 | 制造商:AD 制造商全稱:Analog Devices 功能描述:12-Bit, 80 MSPS/105 MSPS ADC |
| AD9432BSTZ-80 | 功能描述:IC ADC 12BIT 80MSPS 52-LQFP 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(gè)單端，雙極 |
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