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參數(shù)資料
| 型號： | MAX1191ETI-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC |
| 中文描述： | 2-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, QCC28 |
| 封裝： | 5 X 5 MM, 0.80 MM HEIGHT, MO-220, TQFN-28 |
| 文件頁數(shù)： | 14/27頁 |
| 文件大?。?/td> | 492K |
| 代理商： | MAX1191ETI-T |
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M
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
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Detailed Description
The MAX1191 uses a seven-stage, fully differential,
pipelined architecture (Figure 1) that allows for high-
speed conversion while minimizing power consump-
tion. Samples taken at the inputs move progressively
through the pipeline stages every half-clock cycle.
Including the delay through the output latch, the total
clock-cycle latency is 5 clock cycles for channel A and
5.5 clock cycles for channel B.
At each stage, flash ADCs convert the held input volt-
ages into a digital code. The following digital-to-analog
converter (DAC) converts the digitized result back into
an analog voltage, which is then subtracted from the
original held input signal. The resulting error signal is
then multiplied by two, and the product is passed along
to the next pipeline stage where the process is repeated
until the signal has been processed by all stages. Digital
error correction compensates for ADC comparator off-
sets in each pipeline stage and ensures no missing
codes. Figure 2 shows the MAX1191 functional diagram.
Pin Description (continued)
PIN
23
24
25
NAME
PD0
REFIN
COM
FUNCTION
Power-Down Digital Input 0. See Table 3.
Reference Input. Internally pulled up to V
DD
.
Common-Mode Voltage I/O. Bypass COM to GND with a 0.33μF capacitor.
26
REFN
Negative Reference I/O. Conversion range is ±(V
REFP
- V
REFN
). Bypass REFN to GND with a 0.33μF
capacitor.
27
REFP
Positive Reference I/O. Conversion range is ±(V
REFP
- V
REFN
). Bypass REFP to GND with a 0.33μF
capacitor.
—
EP
Exposed Paddle. Internally connected to pin 3. Externally connect EP to GND.
INA+
INA-
T/H
DIGITAL ERROR CORRECTION
D0–D7
FLASH
ADC
T/H
DAC
∑
-
+
x2
1.5 BITS
STAGE 1
STAGE 2
STAGE 7
Figure 1. Pipeline Architecture—Stage Blocks
INA+
INA-
DEC
/
T/H
INB+
INB-
DEC
/
T/H
/
REFERENCE
SYSTEM AND
BIAS
CIRCUITS
PIPELINE
ADC
A
COM
REFN
REFIN
REFP
CLK
TIMING
OV
DD
OGND
MULTIPLEXER
OUTPUT
DRIVERS
POWER
CONTROL
D0
–
D7
/
/
V
DD
GND
PD0
PD1
A/B
PIPELINE
ADC
B
MAX1191
Figure 2. MAX1191 Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1192ETI | 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 |
| MAX1192ETI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 2Ch 22Msps 3.6V 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 |
| MAX1192ETI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 2Ch 22Msps 3.6V 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 |
| MAX1192ETI-T | 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 |
| MAX1193ETI | 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 |
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