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参数资料
| 型号： | MAX1204AEAP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/23页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 8CH 20-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 位数： | 10 |
| 采样率（每秒）： | 133k |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 640mW |
| 电压电源： | 双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 8 个单端，单极；8 个单端，双极；4 个差分，单极；4 个差分，双极 |
MAX1204
5V, 8-Channel, Serial, 10-Bit ADC
with 3V Digital Interface
16
Maxim Integrated
Full power-down mode turns off all chip functions
that draw quiescent current, reducing IDD and ISS typi-
cally to 2A.
Fast power-down mode turns off all circuitry except the
bandgap reference. With fast power-down mode, the
supply current is 30A. Power-up time can be shortened
to 5s in internal compensation mode.
The IDD shutdown current can increase if any digital input
(DIN, SCLK, CS) is held high in either power-down mode.
The actual shutdown current depends on the state of the
digital inputs, the voltage applied to the digital inputs
(VIH), the supply voltage (VDD), and the operating temper-
ature. Figure 12c shows the maximum IDD increase for
each digital input held high in power-down mode for differ-
ent operating conditions. This current is cumulative, so if
all three digital inputs are held high, the additional shut-
down current is three times the value shown in Figure 12c.
In both software power-down modes, the serial interface
remains operational, but the ADC does not convert.
Table 5 shows how the choice of reference-buffer com-
pensation and power-down mode affects both power-up
delay and maximum sample rate.
In external compensation mode, power-up time is 20ms
with a 4.7F compensation capacitor (200ms with a 33F
capacitor) when the capacitor is initially fully discharged.
From fast power-down, start-up time can be eliminated
by using low-leakage capacitors that do not discharge
more than 1/2 LSB while shut down. In power-down, the
capacitor has to supply the current into the reference
(typically 1.5A) and the transient currents at power-up.
Figures 12a and 12b show the various power-down
sequences in both external and internal clock modes.
Software Power-Down
Software power-down is activated using bits PD1 and
PD0 of the control byte. As shown in Table 6, PD1 and
PD0 also specify clock mode. When software power-
down is asserted, the ADC continues to operate in the
last specified clock mode until the conversion is com-
plete. The ADC then powers down into a low
quiescent-current state. In internal clock mode, the
interface remains active and conversion results can be
clocked out even though the MAX1204 has already
entered a software power-down.
The first logical 1 on DIN is interpreted as a start bit
and powers up the MAX1204. Following the start bit,
the control byte also determines clock and power-down
modes. For example, if the control byte contains PD1 =
1, the chip remains powered up. If PD1 = 0,
power-down resumes after one conversion.
Table 5. Typical Power-Up Delay Times
133
2
Full
—
Disabled
133
2
Fast
—
Disabled
133
26
MAXIMUM
SAMPLING RATE
(ksps)
See Figure 14c
300
5
POWER-UP
DELAY (s)
Fast/Full
Full
Fast
POWER-DOWN
MODE
4.7
—
REFERENCE
CAPACITOR
(F)
External
Enabled
REFERENCE
BUFFER
Internal
Enabled
Internal
Enabled
REFERENCE-BUFFER
COMPENSATION MODE
Full power-down mode
0
Fast power-down mode
1
0
PD1
Internal clock mode
0
1
External clock mode
1
DEVICE MODE
PD0
N/A
Full
Power-Down
GND
SHDN
STATE
External compensation
Enabled
Open
Internal compensation
Enabled
VDD
REFERENCE-BUFFER
COMPENSATION
DEVICE
MODE
Table 6. Software Shutdown and
Clock Mode
Table 7. Hard-Wired Shutdown and
Compensation Mode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1204AEPP | 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 |
| MAX1204AEPP+ | 功能描述:模数转换器 - ADC 10-Bit 8Ch 133ksps 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 |
| MAX1204BCAP | 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 |
| MAX1204BCAP+ | 功能描述:模数转换器 - ADC 10-Bit 8Ch 133ksps 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 |
| MAX1204BCAP+T | 功能描述:模数转换器 - ADC 10-Bit 8Ch 133ksps 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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