with a supply voltage" />
參數(shù)資料
型號: AD7760BSVZ
廠商: Analog Devices Inc
文件頁數(shù): 20/37頁
文件大?。?/td> 0K
描述: IC ADC 24BIT 2.5MSPS 64TQFP
標準包裝: 1
位數(shù): 24
采樣率(每秒): 2.5M
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 958mW
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-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 64-TQFP-EP(10x10)
包裝: 托盤
輸入數(shù)目和類型: 1 個差分,單極;1 個差分,雙極
產(chǎn)品目錄頁面: 779 (CN2011-ZH PDF)
AD7760
Rev. A | Page 26 of 36
DRIVING THE AD7760
The AD7760 has an on-chip differential amplifier that operates
with a supply voltage (AVDD3) within the 3.15 V to 5.25 V range.
For a 4.096 V reference, the supply voltage must be 5 V.
To achieve the specified performance in normal mode, the
differential amplifier should be configured as a first-order
antialias filter, as shown in Figure 50. Any additional filtering
should be carried out in previous stages using low noise, high
performance op amps, such as the AD8021.
Suitable component values for the first-order filter are listed in
Table 8. Using the values in the table as an example yields a
10 dB attenuation at the first alias point of 19 MHz.
A1
RIN
RFB
CFB
RIN
RM
CS
RFB
CFB
VIN
A
B
VIN+
0
49
75
-04
0
Figure 50. Differential Amplifier Configuration
Table 8. Normal Mode Component Values
VREF
RIN
RFB
RM
CS
CFB
4.096 V
1 kΩ
655 Ω
18 Ω
5.6 pF
33 pF
Figure 52 shows the signal conditioning that occurs using the
circuit shown in Figure 50 with a ±2.5 V input signal biased
around ground and the component values and conditions listed
in Table 8. The differential amplifier always biases the output
signal to sit on the optimum common mode of VREF/2, in this
case 2.048 V. The signal is also scaled to give the maximum
allowable voltage swing with this reference value. This is
calculated as 80% of VREF, that is, 0.8 × 4.096 V ≈ 3.275 V p-p
on each input.
With a 4.096 V reference, a 5 V supply must be provided to the
reference buffer (AVDD4). With a 2.5 V reference, a 3.3 V supply
must be provided to AVDD4.
Figure 51 shows the transfer function in terms of the 24-bit
digital output codes (twos complement coding) of the AD7760
vs. the voltage signals VA and VB applied to the on-board
differential amplifier A1, as shown in Figure 52.
011…111
011…110
000…010
000…001
000…000
111…111
111…110
100…000
100…001
24 BITS
AD7760
24-BIT
OUTPUT
B= +2.5V
A = –2.5V
A= 0V
B= 0V
A= +2.5V
B = –2.5V
049
75-
056
Figure 51. Transfer Function for the AD7760 Filtered Output Where VA and VB
are Inputs to the On-Board Differential Amplifier A1
+2.5V
0V
–2.5V
A
+2.5V
0V
–2.5V
B
INPUTS TO THE AD7760 DIFFERENTIAL AMPLIFIER
OUTPUTS OF THE AD7760 DIFFERENTIAL AMPLIFIER
+3.685V
+2.048V
+0.410V
+3.685V
+2.048V
+0.410V
VIN+
VIN
0
4
975
-05
5
Figure 52. Differential Amplifier Signal Conditioning
相關(guān)PDF資料
PDF描述
97-3108B-18-11S CONN PLUG RT ANG 5POS W/SOCKETS
AD976ACNZ IC ADC 16BIT 200KSPS 28DIP
SSM2517CBZ-R7 IC AMP AUDIO 2.4W MONO D 9WLCSP
UP050B151K-NAC CAP CER 150PF 50V 10% AXIAL
VE-B00-MX-F3 CONVERTER MOD DC/DC 5V 75W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7760BSVZ-REEL 功能描述:IC ADC 24BIT 2.5MSPS 64TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝: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
AD7761BSTZ 功能描述:16 Bit Analog to Digital Converter 8 Input 8 Sigma-Delta 64-LQFP (10x10) 制造商:analog devices inc. 系列:- 包裝:托盤 零件狀態(tài):有效 位數(shù):16 采樣率(每秒):256k 輸入數(shù):8 輸入類型:差分 數(shù)據(jù)接口:SPI 配置:ADC 無線電 - S/H:ADC:- A/D 轉(zhuǎn)換器數(shù):8 架構(gòu):三角積分 參考類型:外部 電壓 - 電源,模擬:2 V ~ 5.5 V 電壓 - 電源,數(shù)字:- 特性:同步采樣 工作溫度:-40°C ~ 105°C 封裝/外殼:64-LQFP 供應(yīng)商器件封裝:64-LQFP(10x10) 標準包裝:1
AD7761BSTZ-RL 功能描述:16 Bit Analog to Digital Converter 8 Input 8 Sigma-Delta 64-LQFP (10x10) 制造商:analog devices inc. 系列:- 包裝:帶卷(TR) 零件狀態(tài):有效 位數(shù):16 采樣率(每秒):256k 輸入數(shù):8 輸入類型:差分 數(shù)據(jù)接口:SPI 配置:ADC 無線電 - S/H:ADC:- A/D 轉(zhuǎn)換器數(shù):8 架構(gòu):三角積分 參考類型:外部 電壓 - 電源,模擬:2 V ~ 5.5 V 電壓 - 電源,數(shù)字:- 特性:同步采樣 工作溫度:-40°C ~ 105°C 封裝/外殼:64-LQFP 供應(yīng)商器件封裝:64-LQFP(10x10) 標準包裝:1,500
AD7762 制造商:AD 制造商全稱:Analog Devices 功能描述:24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs
AD77628SVZ 制造商:Analog Devices 功能描述: