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參數(shù)資料
| 型號(hào)： | AD7797BRUZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 8/24頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 24BIT SIG-DEL 1CH 16TSSOP |
| 標(biāo)準(zhǔn)包裝： | 96 |
| 位數(shù)： | 24 |
| 采樣率（每秒）： | 123 |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 1.6mW |
| 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： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-TSSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個(gè)差分，單極；1 個(gè)差分，雙極 |
| 產(chǎn)品目錄頁(yè)面： | 779 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7797EBZ-ND - BOARD EVALUATION FOR AD7797 |
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AD7796/AD7797
Rev. A | Page 16 of 24
ADC CIRCUIT INFORMATION
OVERVIEW
The AD7796/AD7797 are low power ADCs that incorporate a
Σ-Δ modulator, in-amp, and an on-chip digital filter intended
for measuring wide dynamic range, low frequency signals, such
as those in pressure transducers and weigh scales.
Each part has one differential input that is buffered. Figure 10
shows the basic connections required to operate the part.
AD7796/AD7797
AIN(+)
AIN(–)
INTERNAL
CLOCK
AVDD
DVDD
REFIN(–)
REFIN(+)
DOUT/RDY
DIN
SCLK
MUX
GND
CLK
Σ-Δ
ADC
VDD
×128
TEMP
SENSOR
SERIAL
INTERFACE
AND
CONTROL
LOGIC
CS
IN+
IN–
OUT–
OUT+
06
08
3-
01
0
Figure 10. Basic Connection Diagram
The output rate of the AD7796/AD7797 (fADC) is user-
programmable. The allowable update rates, along with the
corresponding settling times, are listed in Table 14. Normal
mode rejection is the major function of the digital filter.
Simultaneous 50 Hz and 60 Hz rejection is optimized when the
update rate equals 16.7 Hz or less because notches are placed at
both 50 Hz and 60 Hz with these update rates (see Figure 12).
The AD7796/AD7797 use slightly different filter types,
depending on the output update rate used to optimize the
rejection of quantization noise and device noise. When the
update rate is 4.17 Hz to 12.5 Hz, a Sinc3 filter and an averaging
filter are used. When the update rate is 16.7 Hz to 33.2 Hz,
a modified Sinc3 filter is used. This filter gives simultaneous
50 Hz/60 Hz rejection when the update rate equals 16.7 Hz.
A Sinc4 filter is used when the update rate is from 50 Hz to
the different filter types for some of the update rates.
0
–20
–40
–60
–80
–100
01
100
80
60
40
20
FREQUENCY (Hz)
(d
B
)
20
06
08
3-
01
1
Figure 11. Filter Profile with Update Rate = 4.17 Hz
0
–20
–40
–60
–80
–100
02
180
160
140
120
100
80
60
40
20
FREQUENCY (Hz)
(d
B
)
00
06
08
3-
01
2
Figure 12. Filter Profile with Update Rate = 16.7 Hz
0
–20
–40
–60
–80
–100
0
1000
900
800
700
600
500
400
300
200
100
FREQUENCY (Hz)
(d
B
)
06
08
3-
01
3
Figure 13. Filter Profile with Update Rate = 50 Hz
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| AD7797BRUZ-REEL | 功能描述:IC ADC 24BIT SIG-DEL 1CH 16TSSOP 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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7798 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3-Channel, Low Noise, Low Power, 16-/24-Bit, ADC with On-Chip In-Amp |
| AD7798BRU | 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 0.47KSPS 16BIT SERL 16TSSOP - Bulk |
| AD7798BRUZ | 功能描述:IC ADC 16BIT SIG-DEL 3CH 16TSSOP 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:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7798BRUZ-REEL | 功能描述:IC ADC 16BIT 3CH LP 16-TSSOP 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:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
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