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參數(shù)資料
| 型號： | MAX19700 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 10-Bit, 45Msps, Ultra-Low-Power Analog Front-End |
| 中文描述： | 7.5Msps、超低功耗模擬前端 |
| 文件頁數(shù)： | 24/37頁 |
| 文件大?。?/td> | 561K |
| 代理商： | MAX19700 |
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M
10-Bit, 45Msps, Ultra-Low-Power
Analog Front-End
24
______________________________________________________________________________________
Shutdown mode offers the most dramatic power sav-
ings by shutting down all the analog sections of the
MAX19707 and placing the Rx ADC digital outputs in
tri-state mode. When the Rx ADC outputs transition
from tri-state to ON, the last converted word is placed
on the digital outputs. The Tx DAC previously stored
data is lost when coming out of shutdown mode. The
wake-up time from shutdown mode is dominated by the
time required to charge the capacitors at REFP, REFN,
and COM. In internal reference mode and buffered
external reference mode, the wake-up time is typically
85.2μs to enter Rx mode and 28.2μs to enter Tx mode.
In idle mode, the reference and clock distribution cir-
cuits are powered, but all other functions are off. The
Rx ADC outputs are forced to tri-state. The wake-up
time is 9.8μs to enter Rx mode and 6.4μs to enter Tx
mode. When the Rx ADC outputs transition from tri-
state to ON, the last converted word is placed on the
digital outputs.
In standby mode, the reference is powered, but the rest
of the device functions are off. The wake-up time from
standby mode is 13.7μs to enter Rx mode and 24μs to
enter Tx mode. When the Rx ADC outputs transition
from tri-state to active, the last converted word is
placed on the digital outputs.
FAST and SLOW Rx and Tx Modes
In addition to the external Tx-Rx control, the MAX19707
also features SLOW and FAST modes for switching
between Rx and Tx operation. In FAST Tx mode, the Rx
ADC core is powered on but the ADC core digital out-
puts are tri-stated on the D0–D9 bus; likewise, in FAST
Rx mode, the transmit DAC core is powered on but the
DAC core digital inputs are tri-stated on the D0–D9 bus.
The switching time between Tx to Rx or Rx to Tx is FAST
because the converters are on and do not have to
recover from a power-down state. In FAST mode, the
switching time between Rx to Tx and Tx to Rx is 0.5μs.
Table 9. Offset Control Bits for I and Q Channels (IOFFSET or QOFFSET Mode)
BITS IO5–IO0 WHEN IN IOFFSET MODE, BITS QO5–QO0 WHEN IN QOFFSET MODE
IO5/QO5
IO4/QO4
IO3/QO3
1
1
1
1
1
1
1
1
1
IO2/QO2
1
1
1
IO1/QO1
1
1
0
IO0/QO0
1
0
1
OFFSET 1 LSB =
(VFS
P-P
/ 1023)
-31 LSB
-30 LSB
-29 LSB
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
1
0
0
1
0
-2 LSB
-1 LSB
0mV
0mV (Default)
1 LSB
2 LSB
0
0
0
1
1
1
1
1
1
1
1
1
0
1
1
1
0
1
29 LSB
30 LSB
31 LSB
Note:
For transmit full-scale of ±400mV: 1 LSB = (800mV
P-P
/ 1023) = 0.7820mV.
Table 10. Common-Mode Select
(COMSEL Mode)
CM1
0
0
1
1
CM0
0
1
0
1
Tx DAC OUTPUT COMMON MODE (V)
1.05 (Default)
0.95
0.80
0.70
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX19700ETM | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19700ETM+ | 功能描述:ADC / DAC多通道 7.5Msps CODEC/AFE 1.8/2.7-3.3V RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19700ETM+T | 功能描述:ADC / DAC多通道 7.5Msps CODEC/AFE 1.8/2.7-3.3V RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19700ETM-T | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19700EVCMOD2 | 功能描述:ADC / DAC多通道 Evaluation Kit/Evaluation System for the MAX19700 RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
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