參數(shù)資料
型號： AD7760BSVZ
廠商： Analog Devices Inc
文件頁數(shù)： 13/37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 19 of 36
MODULATOR DATA OUTPUT MODE
Operating the AD7760 in modulator output mode enables the
output of data directly from the Σ-Δ modulator. This mode of
operation bypasses the AD7760 on-board digital filtering
capabilities, outputting data in its unfiltered form.
As discussed in the Theory of Operation section, the AD7760
operates using oversampling, which spreads quantization noise
over a wide bandwidth. The decrease in the quantization noise
energy in the resulting signal band is illustrated in Figure 40a.
By coupling the use of oversampling with the use of a high
order, multibit Σ-Δ modulator, the AD7760 further reduces the
quantization noise in the signal band. Figure 41 is an FFT of
unfiltered data output from the AD7760 when it is used in
modulator output mode. This clearly demonstrates the shaping
of the quantization noise performed by the AD7760’s Σ-Δ
modulator.
MODULATOR INPUTS
The maximum voltage input to each differential modulator
input pin is 0.8 × 4.096 V ≈ 3.275 V (80% of VREF), which must
sit on a common mode of VREF/2. This maximum differential
input voltage is shown as the conditioned output of the AD7760’s
on-board differential amplifier in Figure 52 in the Driving the
AD7760 section.
Further details on the signal conditioning implemented by the
AD7760’s on-board differential amplifier and the recommended
external circuitry that accompanies it is described in the
0
–160
01
FREQUENCY (MHz)
A
M
P
L
IT
UDE
(
d
B)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
12
34
567
89
049
75
-04
8
Figure 41. FFT of Data Output by the AD7760 in Modulator Output Mode
MODULATOR DATA OUTPUT SCALING
In modulator output mode, data is output in a 16-bit twos
complement format on Pins D [15:0]; however, this data is
scaled to 15 bits. The transfer function in Figure 42 shows the
scaling involved for the 16 data bits output from Modulator
Pins D[15:0] vs. the maximum differential voltage input
allowed for the modulator inputs (VIN+ and VIN).
D[15:0]
0011 0011 0011 0010
0011 1111 1111 1111
0000 0000 0000 0000
1100 1100 1100 1100
1100 0000 0000 0000
+4.096V
–4.096V
VIN+ = 3.6855V
VIN– = 0.4105V
+3.275V = MODULATOR FULL SCALE = 80% OF +4.096V
80% OF +4.096V = MODULATOR FULL SCALE = –3.275V
VIN+=2.048V
VIN– = 2.048V
VIN+ = 0.4105V
VIN– = 3.6855V
04
975
-04
9
Figure 42. Modulator Output Data Scaling
As the nature of the modulator output is coarse relative to
the fully filtered output of the AD7760 (due to the associated
quantization noise of the modulator output), Bits D[3:0] of the
modulator output are zero when operating in modulator data
output mode. Thus, the data outputs for the calculations listed
in Example 1 and Example 2 for inputs to the modulator pins
VIN+ and VIN show Bits D[3:0] of the modulator output as zero.
Example 1
VIN+ = 3.5 V
VIN = 0.595 V
Modulator Output Code = ([VIN(+) VIN()]/4.096 V) × 16384
= [(3.5 V 0.595 V)/4.096 V] × 16384
= +11620
Direct Scaling: [0010 1101 0110 0100]
Value Output on Data Output Pins D[15:0]:
D [15:0] = [0010 1101 0110 0000].
Example 2
VIN+ = 0.595 V
VIN = 3.5 V
Modulator Output Code = ([VIN(+) VIN()]/4.096 V) × 16384
= [(0.595 V 3.5 V)/4.096 V] × 16384
= 11620
Direct Scaling: [1101 0010 1001 1100]
Value Output on Data Output Pins D[15:0]:
D [15:0] = [1101 0010 1001 0000].
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:
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*