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參數(shù)資料
| 型號： | MAX188DCAP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 10/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT SERIAL 20-SSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 66 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS） |
| 分辨率（位）： | 12 b |
| 采樣率（每秒）： | 133k |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 電壓電源： | 雙 ± |
| 電源電壓： | ±5V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SSOP（0.209"，5.30mm 寬） |
| 供應商設備封裝： | 20-SSOP |
| 包裝： | 管件 |
Lowest Power at Higher Throughputs
Figure 14b shows the power consumption with
external-reference compensation in fast power-down,
with one and eight channels converted. The external
4.7F compensation requires a 50s wait after power-up,
accomplished by 75 idle clocks after a dummy conver-
sion. This circuit combines fast multi-channel conversion
with lowest power consumption possible. Full
power-down mode may provide increased power sav-
ings in applications where the MAX186/MAX188 are
inactive for long periods of time, but where intermittent
bursts of high-speed conversions are required.
External and Internal References
The MAX186 can be used with an internal or external
reference, whereas an external reference is required for
the MAX188. Diode D1 shown in the
Typical Operating
Circuit ensures correct start-up. Any standard signal
diode can be used. For both parts, an external refer-
ence can either be connected directly at the VREF ter-
minal or at the REFADJ pin.
An internal buffer is designed to provide 4.096V at
VREF for both the MAX186 and MAX188. The
MAX186’s internally trimmed 2.46V reference is
buffered with a gain of 1.678. The MAX188's buffer is
trimmed with a buffer gain of 1.638 to scale an external
2.5V reference at REFADJ to 4.096V at VREF.
MAX186 Internal Reference
The full-scale range of the MAX186 with internal reference
is 4.096V with unipolar inputs, and ±2.048V with bipolar
inputs. The internal reference voltage is adjustable to
±1.5% with the Reference-Adjust Circuit of Figure 17.
External Reference
With both the MAX186 and MAX188, an external refer-
ence can be placed at either the input (REFADJ) or the
output (VREF) of the internal buffer amplifier. The
REFADJ input impedance is typically 20k
Ω for the
MAX186 and higher than 100k
Ω for the MAX188, where
the internal reference is omitted. At VREF, the input
impedance is a minimum of 12k
Ω for DC currents.
During conversion, an external reference at VREF must
be able to deliver up to 350A DC load current and have
an output impedance of 10
Ω or less. If the reference has
higher output impedance or is noisy, bypass it close to
the VREF pin with a 4.7F capacitor.
Low-Power, 8-Channel,
Serial 12-Bit ADCs
18
Maxim Integrated
MAX186/MAX188
1000
1
0
100
300
500
MAX186
FULL POWER-DOWN
10
100
MAX186-14A
CONVERSIONS PER CHANNEL PER SECOND
200
400
2ms FASTPD WAIT
400kHz EXTERNAL CLOCK
INTERNAL COMPENSATION
50
150
250
350
450
8 CHANNELS
1 CHANNEL
AVG.
SUPPLY
CURRENT
(A)
10,000
10
0
MAX186/MAX188
FAST POWER-DOWN
100
1000
CONVERSIONS PER CHANNEL PER SECOND
2k
8 CHANNELS
1 CHANNEL
4k
6k
8k
10k
12k
14k
16k
18k
2MHz EXTERNAL CLOCK
EXTERNAL COMPENSATION
50s WAIT
AVG.
SUPPLY
CURRENT
(A)
Figure 14a. MAX186 Supply Current vs. Sample Rate/Second,
FULLPD, 400kHz Clock
Figure 14b. MAX186/MAX188 Supply Current vs. Sample
Rate/Second, FASTPD, 2MHz Clock
3.0
2.5
2.0
1.5
1.0
0.5
0
0.0001
0.001
0.01
0.1
1
10
TIME IN SHUTDOWN (sec)
POWER-UP
DELAY
(ms)
Figure 14c. Typical Power-Up Delay vs. Time in Shutdown
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX188DCAP+ | 功能描述:模數(shù)轉換器 - ADC 12-Bit 8Ch 133ksps 5.25V 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 |
| MAX188DCAP+T | 功能描述:模數(shù)轉換器 - ADC 12-Bit 8Ch 133ksps 5.25V 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 |
| MAX188DCAP-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 |
| MAX188DCPP | 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 |
| MAX188DCPP+ | 功能描述:模數(shù)轉換器 - ADC 12-Bit 8Ch 133ksps 5.25V 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 |
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