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參數(shù)資料
| 型號： | MAX19192ETI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 9/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 8BIT DUAL 10MSPS 28-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 10M |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 功率耗散（最大）： | 1.67W |
| 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： | 28-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 28-TQFN-EP（5x5） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 4 個單端，單極；2 個差分，單極 |
MAX19192
Ultra-Low-Power, 10Msps, Dual 8-Bit ADC
______________________________________________________________________________________
17
Using Transformer Coupling
An RF transformer (Figure 8) provides an excellent
solution to convert a single-ended source signal to a
fully differential signal, required by the MAX19192 for
optimum performance. Connecting the center tap of the
transformer to COM provides a VDD/2 DC level shift to
the input. Although a 1:1 transformer is shown, a step-
up transformer can be selected to reduce the drive
requirements. A reduced signal swing from the input
driver, such as an op amp, can also improve the overall
distortion.
In general, the MAX19192 provides better SFDR and
THD with fully differential input signals than single-
ended drive, especially for high input frequencies. In
differential input mode, even-order harmonics are lower
as both inputs (INA+, INA- and/or INB+, INB-) are bal-
anced, and each of the ADC inputs only requires half
the signal swing compared to single-ended mode.
Single-Ended AC-Coupled Input Signal
Figure 9 shows an AC-coupled, single-ended applica-
tion. Amplifiers such as the MAX4108 provide high
speed, high bandwidth, low noise, and low distortion to
maintain the input signal integrity.
Buffered External Reference Drives
Multiple ADCs
The buffered external reference mode allows for more
control over the MAX19192 reference voltage and
allows multiple converters to use a common reference.
To drive one MAX19192 in buffered external reference
mode, the external circuit must sink 0.7A, allowing one
reference circuit to easily drive the REFIN of multiple
converters to 1.024V ±10%.
MAX19192
T1
N.C.
VIN
6
1
5
2
4
3
22pF
0.1
μF
0.1
μF
2.2
μF
25
Ω
25
Ω
MINICIRCUITS
TT1-6-KK81
T1
N.C.
VIN
6
1
5
2
4
3
22pF
0.1
μF
0.1
μF
2.2
μF
25
Ω
25
Ω
MINICIRCUITS
TT1-6-KK81
INA-
INA+
INB-
INB+
COM
Figure 8. Transformer-Coupled Input Drive
MAX19192
0.1
μF
1k
Ω
1k
Ω
100
Ω
100
Ω
CIN
22pF
CIN
22pF
INB+
INB-
COM
INA+
INA-
0.1
μF
RISO
50
Ω
RISO
50
Ω
REFP
REFN
VIN
MAX4108
0.1
μF
1k
Ω
1k
Ω
100
Ω
100
Ω
CIN
22pF
CIN
22pF
0.1
μF
RISO
50
Ω
RISO
50
Ω
REFP
REFN
VIN
MAX4108
Figure 9. Using an Op Amp for Single-Ended, AC-Coupled
Input Drive
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| MAX191ACNG+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 100ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX191ACWG | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX191ACWG+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 100ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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