參數資料
| 型號： | MAX1204BCPP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 2/23頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 8CH 20-DIP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 18 |
| 位數： | 10 |
| 采樣率（每秒）： | 133k |
| 數據接口： | MICROWIRE?，串行，SPI? |
| 轉換器數目： | 1 |
| 功率耗散（最大）： | 889mW |
| 電壓電源： | 雙 ± |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 20-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 20-PDIP |
| 包裝： | 管件 |
| 輸入數目和類型： | 8 個單端，單極；8 個單端，雙極；4 個差分，單極；4 個差分，雙極 |
MAX1204
5V, 8-Channel, Serial, 10-Bit ADC
with 3V Digital Interface
10
Maxim Integrated
Input Bandwidth
The ADC’s input tracking circuitry has a 4.5MHz
small-signal bandwidth. Therefore, it is possible to digi-
tize 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
Internal protection diodes, which clamp the analog
inputs to VDD and VSS, allow the analog input pins to
swing from (VSS - 0.3V) to (VDD + 0.3V) without dam-
age. However, for accurate conversions near full scale,
the inputs must not exceed VDD by more than 50mV, or
be lower than VSS by 50mV.
If the analog input exceeds 50mV beyond the sup-
plies, do not forward bias the protection diodes of
off-channels over 2mA, as excessive current
degrades on-channel conversion accuracy.
The full-scale input voltage depends on the voltage at
REF (Tables 1a and 1b).
Quick Look
Use the circuit of Figure 5 to quickly evaluate the
MAX1204’s analog performance. The MAX1204 requires
that a control byte be written to DIN before each conver-
sion. Tying DIN to +3V feeds in control byte $FF hex,
which triggers single-ended unipolar conversions on
CH7 in external clock mode without powering down
between conversions. In external clock mode, the
SSTRB output pulses high for one clock period before
the most significant bit of the conversion result shifts out
of DOUT. Varying the analog input to CH7 alters the
sequence of bits from DOUT. A total of 15 clock cycles
per conversion is required. All SSTRB and DOUT output
transitions occur on SCLK’s falling edge.
How to Start a Conversion
Clocking a control byte into DIN starts conversion on
the MAX1204. With CS low, each rising edge on SCLK
clocks a bit from DIN into the MAX1204’s internal shift
register. After CS falls, the first logic “1” bit defines the
control byte’s MSB. Until this first “start” bit arrives, any
number of logic “0” bits can be clocked into DIN with
no effect. Table 2 shows the control-byte format.
The MAX1204 is fully compatible with MICROWIRE and
SPI devices. For SPI, select the correct clock polarity
and sampling edge in the SPI control registers: set
CPOL = 0 and CPHA = 0. MICROWIRE and SPI both
transmit a byte and receive a byte at the same time.
Using the
Typical Operating Circuit, the simplest soft-
ware interface requires only three 8-bit transfers to per-
form a conversion (one 8-bit transfer to configure the
ADC, and two more 8-bit transfers to clock out the con-
version result).
Table 1b. Bipolar Full Scale, Zero Scale,
and Negative Full Scale
Table 1a. Unipolar Full Scale
and Zero Scale
REFERENCE
External
ZERO
SCALE
0V
Internal
at REFADJ
at REF
FULL SCALE
+4.096V
VREFADJ x 1.68
VREF
REFERENCE
-1/2 VREF
-1/2 VREFADJ x
1.68
-4.096V/2
NEGATIVE
FULL SCALE
ZERO
SCALE
0V
Internal
at
REFADJ
at REF
FULL SCALE
+4.096V / 2
+1/2 VREFADJ
x 1.68
+1/2 VREF
External
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參數描述 |
|---|---|
| MAX1204BCPP+ | 功能描述:模數轉換器 - ADC 10-Bit 8Ch 133ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1204BEAP | 功能描述:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1204BEAP+ | 功能描述:模數轉換器 - ADC 10-Bit 8Ch 133ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1204BEAP+T | 功能描述:模數轉換器 - ADC 10-Bit 8Ch 133ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1204BEAP-T | 功能描述:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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