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参数资料
| 型号： | MAX1204AEAP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/23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
18
Maxim Integrated
Lowest Power at Higher Throughputs
Figure 14b shows power consumption with external-
reference compensation in fast power-down, with one and
eight channels converted. The external 4.7F compensa-
tion requires a 50s wait after power-up. This circuit com-
bines fast multichannel conversion with the lowest power
consumption possible. Full power-down mode can
increase power savings in applications where the
MAX1204 is inactive for long periods of time, but where
intermittent bursts of high-speed conversions are required.
External and Internal References
The MAX1204 can be used with an internal or external
reference. An external reference can be connected
directly at the REF terminal or at the REFADJ pin.
An internal buffer is designed to provide 4.096V at REF
for the MAX1204. Its internally trimmed 2.44V reference
is buffered with a 1.68 nominal gain.
Internal Reference
The MAX1204’s full-scale range with internal reference is
4.096V with unipolar inputs and ±2.048V with bipolar
inputs. The internal reference voltage is adjustable to
±1.5% with the circuit of Figure 17.
External Reference
An external reference can be placed at either the input
(REFADJ) or the output (REF) of the MAX1204’s internal
buffer amplifier. The REFADJ input impedance is typical-
ly 20k
. At REF, the input impedance is a minimum of
12k
for DC currents. During conversion, an external
reference at REF must deliver up to 350A DC load cur-
rent and have an output impedance of 10
or less. If the
reference has higher output impedance or is noisy,
bypass it close to the REF pin with a 4.7F capacitor.
Using the buffered REFADJ input makes buffering of
the external reference unnecessary. To use the direct
REF input, disable the internal buffer by tying REFADJ
to VDD. In power-down, the input bias current to
REFADJ can be as much as 25A with REFADJ tied to
VDD. Pull REFADJ to GND to minimize the input bias
current in power-down.
Transfer Function and Gain Adjust
Figure 15 depicts the nominal, unipolar input/output
(I/O) transfer function, and Figure 16 shows the bipolar
I/O transfer function. Code transitions occur halfway
between successive integer LSB values. Output coding
is binary with 1 LSB = 4mV (4.096V/1024) for
unipolar operation and 1 LSB = 4mV [(4.096V/2 -
-4.096V/2)/1024] for bipolar operation.
Figure 13. MAX1204 FULLPD/FASTPD Power-Up Sequence
10 0
DIN
REFADJ
REF
2.5V
0V
4V
0V
10 1
1
11
0 0
10 1
FULLPD
FASTPD
NOPD
FULLPD
FASTPD
2ms WAIT
COMPLETE CONVERSION SEQUENCE
tBUFFEN
≈ 15s
τ = RC = 20k x CREFADJ
(ZEROS)
CH1
CH7
(ZEROS)
Figure 12c. Additional IDD Shutdown Supply Current vs. VIH
for Each Digital Input at a Logic 1
0
-60
10
5
TEMPERATURE (
°C)
SUPPLY
CURRENT
PER
INPUT
(
A)
100
25
20
15
-20
60
140
40
35
30
20
(VDD - VIH) = 1.95V
(VDD - VIH) = 2.55V
(VDD - VIH) = 2.25V
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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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