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参数资料
| 型号： | MAX116 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 2x4-Channel, Simultaneous-Sampling 12-Bit ADCs |
| 中文描述： | 2x4通道、同时采样、12位ADC |
| 文件页数： | 8/14页 |
| 文件大小： | 215K |
| 代理商： | MAX116 |
M
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
8
_______________________________________________________________________________________
The conversion timing and control sequences are
derived from either an internal clock or an external
clock, the
CONVST
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 com-
plete. An on-board sequencer converts one to four
channels per
CONVST
pulse. In the default mode, one
T/H output (CH1A) is converted. An interrupt signal
(
INT
) is provided after the last conversion is complete.
Convert two to four channels by reprogramming the
MAX115/MAX116 through the bidirectional parallel
interface. Once programmed, the MAX115/MAX116
continues to convert the specified number of channels
per
CONVST
pulse until they are reprogrammed. The
channels are converted sequentially, beginning with
CH1. The
INT
signal always follows the end of the last
conversion in a conversion sequence. The ADC con-
verts each assigned channel in 2μs and stores the
result in an internal 4 x 12-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 and data from
CH1 is always read first. After performing four consecu-
tive reads or initiating a new conversion, 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 a 10MHz 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 MAX115’s input range is ±5V, and the MAX116’s
input range is ±2.5V. The input resistance for the
MAX115 is 10k
(typ), and the input resistance for the
MAX116 is 1M
(typ). An input protection structure
allows input voltages to ±17V without harming the IC.
This protection is also active in shutdown mode.
S1A
S2A
HOLD
BUFFER
TRACK
C
7pF
HOLD
FROM MICROSEQUENCER
REFOUT
TRACK
MUX
DAC
SAR
S1B
S2B
S3B
S3A
C
IN
R3
R2
R1
C
IN
R3
R2
R1
CH_A
CH_B
MAX115
MAX116
MAX115:
R1 =
∞,
R2 = R3 = 5k
MAX116:
R1 = R2 = 5k
,
R3 =
∞
Figure 3. Equivalent Input Circuit
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相关代理商/技术参数 |
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|---|---|
| MAX1160 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:10-Bit, 20Msps, TTL-Output ADC |
| MAX11600 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/8-/12-Channel 2-Wire Serial 8-Bit ADCs |
| MAX11600_10 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation System |
| MAX11600EKA+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX11600EKA+T | 功能描述:模数转换器 - ADC 8-Bit 4Ch 188ksps 5.5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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