- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373962 > AD9245BCPRL7-80 (ANALOG DEVICES INC) 14-Bit, 80 MSPS, 3 V A/D Converter PDF資料下載
參數(shù)資料
| 型號： | AD9245BCPRL7-80 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 14-Bit, 80 MSPS, 3 V A/D Converter |
| 中文描述： | 1-CH 14-BIT FLASH METHOD ADC, PARALLEL ACCESS, QCC32 |
| 封裝： | EXPOSED PAD, MO-220-VHHD-2, LFCSP-32 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大?。?/td> | 1510K |
| 代理商： | AD9245BCPRL7-80 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
AD9245
TIMING
The AD9245 provides latched data outputs with a pipeline delay
of seven clock cycles. Data outputs are available one propaga-
tion delay (t
PD
) after the rising edge of the clock signal. Refer to
for a detailed timing diagram.
Figure 2
The length of the output data lines and the loads placed on
them should be minimized to reduce transients within the
AD9245. These transients can degrade the converter’s dynamic
performance.
The lowest typical conversion rate of the AD9245 is 1 MSPS. At
clock rates below 1 MSPS, dynamic performance may degrade.
VOLTAGE REFERENCE
A stable and accurate 0.5 V voltage reference is built into the
AD9245. The input range can be adjusted by varying the refer-
ence voltage applied to the AD9245 using either the internal
reference or an externally applied reference voltage. The input
span of the ADC tracks reference voltage changes linearly. The
various reference modes are summarized
in the following sections.
and described
Table 8
Table 8
Table 8. Reference Configuration Summary
Selected Mode
External Reference
Internal Fixed Reference
Programmable Reference
If the ADC is being driven differentially through a transformer,
the reference voltage can be used to bias the center tap (com-
mon-mode voltage).
INTERNAL REFERENCE CONNECTION
A comparator within the AD9245 detects the potential at the
SENSE pin and configures the reference into one of four
possible states, which are summarized in
grounded, the reference amplifier switch is connected to the
internal resistor divider (see
Connecting the SENSE pin to VREF switches the reference
amplifier output to the SENSE pin, completing the loop and
providing a 0.5 V reference output. If a resistor divider is
connected as shown in
SENSE pin. This puts the reference amplifier in a noninverting
mode with the VREF output defined as follows:
. If SENSE is
), setting VREF to 1 V.
Figure 33
, the switch is again set to the
Figure 33. Internal Reference Configuration
Figure 35
1
×
=
R1
R2
VREF
5
In all reference configurations, REFT and REFB drive the A/D
conversion core and establish its input span. The input range of
the ADC always equals twice the voltage at the reference pin for
either an internal or an external reference.
03583-B-017
10
μ
F+
0.1
μ
F
VREF
SENSE
0.5V
AD9245
VIN–
VIN+
REFT
0.1
μ
F
0.1
μ
F
10
μ
F
0.1
μ
F
REFB
SELECT
LOGIC
ADC
CORE
+
If the internal reference of the AD9245 is used to drive multiple
converters to improve gain matching, the loading of the refer-
ence by the other converters must be considered. Figure 34
depicts how the internal reference voltage is affected by loading.
LOAD (mA)
E
0.05
0
0.5
1.0
1.5
2.0
2.5
3.0
0358
3-B
-019
0
–0.25
–0.20
–0.15
–0.10
–0.05
0.5V ERROR (%)
1.0V ERROR (%)
Figure 34. VREF Accuracy vs. Load
SENSE Voltage
AVDD
VREF
0.2 V to VREF
Internal Switch
Position
N/A
SENSE
SENSE
Resulting VREF (V)
N/A
0.5
+
×
R1
1.0
Resulting Differential
Span (V p-p)
2 × External Reference
1.0
2 × VREF
R2
5
(See Figure 35)
Internal Fixed Reference
AGND to 0.2 V
Internal Divider
2.0
Rev. B | Page 17 of 28
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9245BCPZ-80 | 14-Bit, 80 MSPS, 3 V A/D Converter |
| AD9245BCPZRL7-80 | 14-Bit, 80 MSPS, 3 V A/D Converter |
| AD9248 | 14-Bit, 20/40/65 MSPS Dual A/ D Converter |
| AD9248-20PCB | 14-Bit, 20/40/65 MSPS Dual A/ D Converter |
| AD9248-40PCB | 14-Bit, 20/40/65 MSPS Dual A/ D Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9245BCPZ-20 | 功能描述:IC ADC 14BIT SGL 20MSPS 32LFCSP 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 標準包裝: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 供應商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD9245BCPZ-202 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 3 V A/D Converter |
| AD9245BCPZ-40 | 功能描述:IC ADC 14BIT SGL 40MSPS 32LFCSP 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 標準包裝: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 供應商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD9245BCPZ-402 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 3 V A/D Converter |
| AD9245BCPZ-65 | 功能描述:IC ADC 14BIT SGL 65MSPS 32LFCSP 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 標準包裝: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 供應商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
發(fā)布緊急采購，3分鐘左右您將得到回復。