- 您现在的位置：买卖IC网 > PDF目录9867 > MAX1294ACEI+ (Maxim Integrated Products)IC ADC 12BIT 420KSPS 28-QSOP PDF资料下载
参数资料
| 型号： | MAX1294ACEI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/19页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 420KSPS 28-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 位数： | 12 |
| 采样率（每秒）： | 420k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 667mW |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 28-QSOP |
| 包装： | 管件 |
| 输入数目和类型： | 6 个单端，单极；6 个单端，双极；3 个伪差分，单极；3 个伪差分，双极 |
MAX1294/MAX1296
420ksps, +5V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
______________________________________________________________________________________
15
Shutdown Mode
Shutdown mode turns off all chip functions that draw
quiescent current, reducing the typical supply current
to 2A immediately after the current conversion is com-
pleted. A rising edge on WR causes the MAX1294/
MAX1296 to exit shutdown mode and return to normal
operation. To achieve full 12-bit accuracy with a 4.7F
reference bypass capacitor, 500s is required after
power-up. Waiting 500s in standby mode, instead of
in full-power mode, can reduce power consumption by
a factor of three or more. When using an external refer-
ence, only 50s is required after power-up. Enter
standby mode by performing a dummy conversion with
the control byte specifying standby mode.
Note: Bypass capacitors larger than 4.7F between
REF and GND result in longer power-up delays.
Transfer Function
Table 5 shows the full-scale voltage ranges for unipolar
and bipolar modes. Figures 8 depicts the nominal
unipolar input/output (I/O) transfer function, and Figure 9
shows the bipolar I/O transfer function. Code transitions
occur halfway between successive-integer LSB values.
Output coding is binary, with 1 LSB = (VREF / 4096).
Maximum Sampling Rate/
Achieving 475ksps
When running at the maximum clock frequency of
7.6MHz, the specified throughput of 420ksps is
achieved by completing a conversion every 18 clock
cycles: 1 write cycle, 3 acquisition cycles, 13 conver-
sion cycles, and 1 read cycle. This assumes that the
results of the last conversion are read before the next
control byte is written. It is possible to achieve higher
throughputs, up to 475ksps, by first writing a control
byte to begin the acquisition cycle of the next conver-
sion, and then reading the results of the previous con-
version from the bus. This technique (Figure 10) allows
a conversion to be completed every 16 clock cycles.
Note that the switching of the data bus during acquisi-
Table 5. Full Scale and Zero Scale for Unipolar and Bipolar Operation
111 . . . 111
111 . . . 110
100 . . . 010
100 . . . 001
100 . . . 000
011 . . . 111
011 . . . 110
011 . . . 101
000 . . . 001
000 . . . 000
1
0
INPUT VOLTAGE (LSB)
OUTPUT CODE
ZS = COM
FS = REF + COM
1 LSB =
REF
4096
FULL-SCALE
TRANSITION
(COM)
FS - 3/2 LSB
FS
2
2048
UNIPOLAR MODE
BIPOLAR MODE
VREF + COM
VREF/2 + COM
Positive Full Scale
Full Scale
COM
Zero Scale
—
-VREF/2 + COM
Negative Full Scale
—
Figure 8. Unipolar Transfer Functions
011 . . . 111
011 . . . 110
000 . . . 010
000 . . . 001
000 . . . 000
111 . . . 111
111 . . . 110
111 . . . 101
100 . . . 001
100 . . . 000
- FS
COM*
INPUT VOLTAGE (LSB)
OUTPUT CODE
ZS = COM
+FS - 1 LSB
+ COM
FS =
REF
2
-FS =
+ COM
-REF
2
1 LSB =
REF
4096
*COM
≥ VREF / 2
Figure 9. Bipolar Transfer Functions
相关PDF资料 |
PDF描述 |
|---|---|
| MS27468E15B35PB | CONN RCPT 37POS JAM NUT W/PINS |
| MAX1265ACEI+ | IC ADC 12BIT 265KSPS 28-QSOP |
| VE-2TP-MX-F4 | CONVERTER MOD DC/DC 13.8V 75W |
| VE-2TP-MX-F3 | CONVERTER MOD DC/DC 13.8V 75W |
| VE-2TP-MX-F2 | CONVERTER MOD DC/DC 13.8V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1294ACEI+ | 功能描述:模数转换器 - ADC 12-Bit 6Ch 420ksps 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 |
| MAX1294ACEI+T | 功能描述:模数转换器 - ADC 12-Bit 6Ch 420ksps 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 |
| MAX1294ACEI-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 |
| MAX1294AEEI | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) 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 |
| MAX1294AEEI+ | 功能描述:模数转换器 - ADC 12-Bit 6Ch 420ksps 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 |
发布紧急采购，3分钟左右您将得到回复。