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MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326
8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
______________________________________________________________________________________
17
Data Throughput
The data throughput (fTH) of the MAX1316–MAX1318/
MAX1320–MAX1322/MAX1324–MAX1326 is a function
of the clock speed (fCLK). In internal-clock mode, fCLK =
10MHz. In external-clock mode, 100kHz ≤ fCLK ≤
12.5MHz. When reading during conversion (Figures 5
and 6), calculate fTH as follows:
where N is the number of active channels and tQUIET
includes acquistion time tACQ. tQUIET is the period of bus
inactivity before the rising edge of CONVST. Typically use
tQUIET = tACQ + 50ns, and prevent disturbance on the
output bus from corrupting signal acquistion. See the
Starting a Conversion section for more information.
Reading a Conversion Result
Reading During a Conversion
Figures 5 and 6 show the interface signals for initiating a
read operation during a conversion cycle. These figures
show two channels selected for conversion. If more chan-
nels are selected, the results are available successively
every third clock cycle. CS can be low at all times; it can
be low during the RD cycles, or it can be the same as RD.
After initiating a conversion by bringing CONVST high,
wait for EOC to go low (about 1.6s in internal-clock
mode or 17 clock cycles in external-clock mode) before
reading the first conversion result. Read the conversion
result by bringing RD low, thus latching the data to the
parallel digital-output bus. Bring RD high to release the
digital bus. Wait for the next falling edge of EOC (about
300ns in internal-clock mode or three clock cycles in
external-clock mode) before reading the next result.
When the last result is available, EOLC goes low.
f
t
xN
f
TH
QUIET
CLK
=
+
+
1
16
3
1
()
Table 3. Throughput vs. Channels Sampled (tQUIET = tACQ = 200ns, fCLK = 10MHz)
CHANNELS
SAMPLED
(N)
CLOCK CYCLES
UNTIL LAST
RESULT
CLOCK CYCLE FOR
READING LAST
CONVERSION
TOTAL
CONVERSION
TIME (ns)
SAMPLES PER
SECOND
(ksps)
THROUGHPUT
PER CHANNEL
(ksps)
1
16
1
1900
526
2
19
1
2200
909
455
3
22
1
2500
1200
400
4
25
1
2800
1429
357
5
28
1
3100
1613
323
6
31
1
3400
1765
294
7
34
1
3700
1892
270
8
37
1
4000
2000
250
Figure 5. Read During Conversion—Two Channels Selected, Internal Clock
CONVST
CH0
TRACK
HOLD
D0–D13
SAMPLE
t1
t13
t12
t10
t3
t11
TRACK
CH1
tCONV
tNEXT
EOC
RD
t20
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相关代理商/技术参数
MAX1320ECM-T 功能描述:模数转换器 - 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
MAX1320EVB16 功能描述:数据转换 IC 开发工具 8-/4-/2-Channel 14-Bit Simultaneous-Sampling ADCs with 10V 5V and 0 to +5V Analog Input Ranges RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V
MAX1320EVKIT 功能描述:数据转换 IC 开发工具 Evaluation Kit/Evaluation System for the MAX1316 MAX1317 MAX1318 MAX1319 MAX1320 MAX1321 MAX1322 RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V
MAX1321ECM 功能描述:模数转换器 - 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
MAX1321ECM+ 功能描述:模数转换器 - ADC 14-Bit 4Ch 526ksps 3V 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
MAX1321ECM+T 功能描述:模数转换器 - ADC 14-Bit 4Ch 526ksps 3V 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
MAX1321ECM-T 功能描述:模数转换器 - 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
MAX13221ECTE 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: