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參數(shù)資料
| 型號(hào)： | AD7626BCPZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT 10MSPS DIFF 32LFCSP |
| 設(shè)計(jì)資源： | Single-Ended-to-Differential High Speed Drive Circuit for 16-Bit, 10 MSPS AD7626 ADC (CN0105) |
| 特色產(chǎn)品： | AD7626 PulSAR Differential ADC |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 10M |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 170mW |
| 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： | 32-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 32-LFCSP-VQ（5x5） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 2 個(gè)單端，單極；1 個(gè)差分，雙極 |
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AD7626
Data Sheet
Rev. B | Page 18 of 28
DRIVING THE AD7626
Differential Analog Input Source
Figure 33 shows an ADA4899-1 driving each differential input
to the AD7626.
Single-Ended-to-Differential Driver
For applications using unipolar analog signals, a single-
ended-to-differential driver (as shown in Figure 32) allows
for a differential input into the part. This configuration, when
provided with an input signal of 0 V to 4.096 V, produces a
differential ±4.096 V with midscale at 2.048 V. The one-pole
filter using R = 20 Ω and C = 56 pF provides a corner frequency
of 140 MHz. The VCM output of the AD7626 can be buffered
and then used to provide the required 2.048 V common-mode
voltage.
Single-Ended or Fully Differential High Frequency Driver
In applications that require higher input frequency tones, the
ADA4932-1 can be used to drive the inputs to the AD7626. The
ADA4932-1 is a differential driver, which also allows the user
the option of single-ended-to-differential conversion.
Figure 34 shows the typical circuit for a 50 Ω source impedance
(ac-coupled in this example). The input to the ADA4932-1 is
configured to be balanced to the source impedance (in this case
50 Ω). Further information on balancing the input impedance
to the source impedance can be found on the ADA4932-1
datasheet. The circuit shown in Figure 34 operates with an
overall gain of ~0.5 when the termination input termination
is taken into account.
Alternatively, the ADA4932-1 can be used with a fully diffe-
rential source—it acts as an inverting differential driver.
56pF
20
50
IN+
IN–
AD7626
VCM
V–
V+
AD8031, AD8032
U2
U1
ADA4899-1
56pF
100nF
590
ANALOG INPUT
(UNIPOLAR 0V TO 4.096V)
0
76
48
-03
3
Figure 32. Single-Ended-to-Differential Driver Circuit Using ADA4899-1
56pF
20
–VS
0V TO VREF
+VS
56pF
20
–VS
VREF TO 0V
+VS
CREF
10F2
REF1
REF
GND
IN+
IN–
AD7626
ADA4899-1
1SEE THE VOLTAGE REFERENCE OPTIONS SECTION. CONNECTION TO EXTERNAL REFERENCE SIGNALS
IS DEPENDENT ON THE EN1 AND EN0 SETTINGS.
2CREF IS USUALLY A 10F CERAMIC CAPACITOR WITH LOW ESL AND ESR.
DECOUPLE REF AND REFIN PINS AS PER THE EN1 AND EN0 RECOMMENDATIONS
VCM
–VS
+VS
BUFFERED VCM PIN OUTPUT
GIVES THE REQUIRED 2.048V
COMMON-MODE SUPPLY FOR
ANALOG INPUTS.
VCM
2.048V
AD8031, AD8032
ADA4899-1
REFIN
REF1
CREF
10F2
0.1F
07
64
8-
02
5
Figure 33. Driving the AD7626 from a Differential Analog Source Using ADA4899-1
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| AD7626BCPZ-RL7 | 功能描述:IC ADC 16BIT 10MSPS DIFF 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:- 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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| AD7628BFN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Digital-to-Analog Converter |
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| AD7628BQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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