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参数资料
| 型号： | MAX1282EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/23页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX1282 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 400k |
| 数据接口： | 串行 |
| 输入范围： | ±VREF/2 |
| 在以下条件下的电源（标准）： | 13.75mW @ 400kSPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | MAX1282 |
| 已供物品： | 板，CD |
MAX1282/MAX1283
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
______________________________________________________________________________________
15
progress and powers down into the specified low-qui-
escent-current state (2A, 0.9mA, or 1.3mA).
The first logic 1 on DIN is interpreted as a start bit and
puts the MAX1282/MAX1283 into its full-power mode.
Following the start bit, the data input word or control
byte also determines the next power-down state. For
example, if the DIN word contains PD1 = 0 and PD0 = 1,
a 0.9mA power-down resumes after one conversion.
Table 4 details the four power modes with the corre-
sponding supply current and operating sections.
Hardware Power-Down
Pulling SHDN low places the converter in hardware
power-down. Unlike software power-down mode, the
conversion is not completed; it stops coincidentally with
SHDN being brought low. When returning to normal
operation—from SHDN, with an external reference—the
MAX1282/MAX1283 can be considered fully powered
up within 2s of actively pulling SHDN high. When
using the internal reference, the conversion should be
initiated only when the reference has settled; its recov-
ery time is dependent on the external bypass capaci-
tors and the time between conversions.
Power-Down Sequencing
The MAX1282/MAX1283 auto power-down modes can
save considerable power when operating at less than
maximum sample rates. Figures 9 and 10 show the
average supply current as a function of the sampling
rate. The following sections discuss the various power-
down sequences. Other combinations of clock rates
and power-down modes may attain the lowest power
consumption in other applications.
Using Full Power-Down Mode
Full power-down mode (FULLPD) achieves the lowest
power consumption, up to 1000 conversions per chan-
nel per second. Figure 9a shows the MAX1283’s power
consumption for one- or four-channel conversions utiliz-
ing full power-down mode (PD1 = PD0 = 0), with the
internal reference and conversion controlled at the
maximum clock speed. A 0.01F bypass capacitor at
REFADJ forms an RC filter with the internal 17k refer-
ence resistor, with a 170s time constant. To achieve
full 12-bit accuracy, nine time constants or 1.5ms are
required after power-up if the bypass capacitor is fully
discharged between conversions. Waiting this 1.5ms
duration in fast power-down (FASTPD) or reduced-
power (REDP) mode instead of in full power-up can fur-
ther reduce power consumption. This is achieved by
using the sequence shown in Figure 11a.
Figure 9b shows the MAX1283’s power consumption for
one- or four-channel conversions utilizing FULLPD
mode (PD1 = PD0 = 0), with an external reference and
conversion controlled at the maximum clock speed.
One dummy conversion to power up the device is
needed, but no waiting time is necessary to start the
second conversion, thereby achieving lower power
consumption as low as half the full sampling rate.
400ns
(CLK = 6.4MHz)
IDLE
CS
SCLK
DIN
SSTRB
DOUT
A/D STATE
tACQ
IDLE
CONVERSION
RB3
RB2
RB1
SEL
2
1
START
4
8
9
1216
2024
SEL
1
SEL
0
UNI/
BIP
SGL/
DIF
PD2 PD2
B11 B10 B9
B8 B7
B6
B5
B4
B3 B2
B1
B0
Figure 5. Single-Conversion Timing
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1283ACEE | 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 |
| MAX1283AEEE | 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 |
| MAX1283BCUE | 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 |
| MAX1283BCUE+ | 功能描述:模数转换器 - ADC 12-Bit 4Ch 300ksps 3.6V 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 |
| MAX1283BCUE+T | 功能描述:模数转换器 - ADC 12-Bit 4Ch 300ksps 3.6V 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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