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參數(shù)資料
| 型號： | MAX125EVB16 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL KIT FOR MAX125 |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| ADC 的數(shù)量： | 4 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 250k |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 輸入范圍： | ±5 V |
| 在以下條件下的電源（標準）： | 165mW @ 250kSPS |
| 工作溫度： | 0°C ~ 70°C |
| 已用 IC / 零件： | MAX125 |
| 已供物品： | 2 板，CD |
MAX125/MAX126
2x4-Channel, Simultaneous-Sampling
14-Bit DAS
8
_______________________________________________________________________________________
signal, and the programmed mode. The T/H amplifiers
hold the input voltages at the CONVST rising edge.
Additional CONVST pulses are ignored until the last
conversion for the sample is complete. The ADC con-
verts each assigned channel in 3s and stores the
result in an internal 4x14-bit memory.
At the end of the last conversion, INT goes low and the
T/H amplifiers begin to track the inputs again. The data
can be accessed by applying successive pulses to the
RD
pin. Successive reads access data words sequen-
tially. The memory is
not random-access; data from
CH1 is always read first. After accessing all pro-
grammed channels, the address pointer selects CH1
again. Additional read pulses cycle through the data
words. CS can be held low during successive reads.
Input Bandwidth
The T/H’s input tracking circuitry has an 8MHz small-
signal bandwidth, so it is possible to digitize high-
speed transient events and measure periodic signals
with bandwidths exceeding the ADC’s sampling rate by
using undersampling techniques. To avoid high-
frequency signals being aliased into the frequency
band of interest, anti-alias filtering is recommended.
Analog Input Range and Input Protection
The MAX125’s input range is ±5V, and the MAX126’s
input range is ±2.5V. The input resistance for both parts
is 10k
. An input protection structure allows input volt-
ages to ±17V without harming the IC. This protection is
also active in shutdown mode.
Track/Holds
The MAX125/MAX126 feature four simultaneous T/Hs.
Each T/H has two multiplexed inputs. A T-switch input
configuration provides excellent hold-mode isolation.
Allow 1s acquisition time for 14-bit accuracy.
The T/H aperture delay is typically 10ns. The 500ps
aperture-delay mismatch between the T/Hs allows the
relative phase information of up to four different inputs
to be preserved. Figure 3 shows the equivalent input
circuit, illustrating the ADC’s sampling architecture.
Only one of four T/H stages with its two multiplexed
inputs (CH_A and CH_B) is shown. All switches are in
track configuration for channel A. An internal buffer
charges the hold capacitor to minimize the required
acquisition time between conversions. The analog input
appears as a 10k
resistor in parallel with a 16pF
capacitor.
CIN
5k
CIN
5k
S1A
S2A
HOLD
BUFFER
TRACK
CHOLD
7pF
HOLD
FROM MICROSEQUENCER
REFOUT
TRACK
MUX
DAC
SAR
S1B
S2B
S3B
S3A
5k
CH_A
CH_B
MAX125
MAX126
Figure 3. Equivalent Input Circuit
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX125EVKIT | 功能描述:數(shù)據(jù)轉換 IC 開發(fā)工具 MAX125/126 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| MAX1261ACEI | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1261ACEI+ | 功能描述:模數(shù)轉換器 - ADC 12-Bit 8Ch 250ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1261ACEI+T | 功能描述:模數(shù)轉換器 - ADC 12-Bit 8Ch 250ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1261ACEI-T | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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