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參數(shù)資料
| 型號： | MAX1254BEUE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT W/REF 16-TSSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 94k |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 15mW |
| 電壓電源： | 模擬和數(shù)字，雙 ± |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)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 |
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MAX1253/MAX1254
Stand-Alone, 10-Channel, 12-Bit System Monitors
with Internal Temperature Sensor and VDD Monitor
______________________________________________________________________________________
25
Channel-Enable Register Power-Up/Reset Defaults
At power-on or after a RESET command, the channel-
enable register resets to FF hex, enabling all channels:
the internal temperature sensor, the VDD monitor, and
AIN0–AIN7.
Input Configuration Register
Power-Up/Reset Defaults
At power-on or after a RESET command, the input con-
figuration register resets to 00 hex, configuring
AIN0–AIN7 for single-ended voltage measurement.
Alarm Register Power-Up/Reset Defaults
At power-on or after a RESET command, the alarm reg-
ister is reset to 000000 hex, indicating that no alarm
condition exists.
Current Data Register Power-Up/Reset Defaults
At power-on or after a RESET command, each chan-
nel’s current data register is reset to 800 hex.
Upper Threshold Register Power-Up/Reset Defaults
At power-on or after a RESET command, each chan-
nel's upper threshold register is reset to FFF hex. This
state effectively disables the upper threshold.
Lower Threshold Register Power-Up/Reset Defaults
At power-on or after a RESET command, each chan-
nel's lower threshold register is reset to 000 hex. This
state effectively disables the lower threshold.
Channel Configuration Register
Power-Up/Reset Defaults
At power-on or after a RESET command, each chan-
nel's configuration register is reset to 000 hex, which
configures the fault bits to cause an alarm to occur on
the first overrange or underrange condition and dis-
ables averaging.
Computing Data Throughput
The MAX1253/MAX1254 throughput rate depends on
the number of enabled channels, their configuration
(temperature or voltage), and the reference mode.
Voltage measurements require 10.6s (typ) to com-
plete, and temperature measurements require 46s.
Channel pairs configured for differential measurements
count as only one for throughput computation.
The reference system takes 20s to power up in refer-
ence mode 00 prior to each temperature measurement,
40s to power up in reference mode 01 after each sam-
ple wait period (if sample wait time > 80s), and no
power-up time in reference mode 10.
The sampling period is calculated as follows:
tsw =(tpu)+(Nv)tconv[volt] +(Nt)tconv[temp] +twait
where:
tsw = all channels scan sampling period
tpu = reference power-up time
tconv[volt] = voltage-configured channel conversion time
Nv = number of voltage-configured channels
tconv[temp] = temperature-configured channel conver-
sion time
Nt = number of temperature-configured channels
twait = sample wait time
The terms in the above equation are determined as
shown above by the number of enabled channels, the
input channel configuration (voltage vs. temperature),
the sample wait time, and the reference mode. The fol-
lowing calculation shows a numeric example:
tsw = 40s + 8 x 10.6s + 2 x 46s + 395s = 611.8s
40s is the time required for the reference to power-
up (reference mode = 00) every time the
MAX1253/MAX1254 come out of automatic shut-
down mode after a sample wait period.
8 x 10.6s is the time required for seven channels
configured for voltage measurement and the VDD
monitor.
2 x 46s is the time required for temperature mea-
surement (46s for each temperature measurement
(internal or external)).
395s is the sample wait time, set by bits B5, B6, B7
of the setup register (see Tables 7 and 8).
The MAX1253/MAX1254 use an internal clock for all
conversions. The serial interface clock does not affect
conversion time.
Performing eight single-ended remote channels tem-
perature measurements, an internal temperature mea-
surement, and an internal VDD measurement with a
sample wait time of zero results in an average conver-
sion rate of 24ksps or 2.4ksps per channel.
Performing eight single-ended voltage measurements, an
internal temperature measurement, and an internal VDD
measurement with sample wait time of zero results in an
average conversion rate of 70ksps or 7ksps per channel.
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| MAX1254EVC16 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Stand-Alone 10-Channel 12-Bit System Monitors with Internal Temperature Sensor and VDD Monitor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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 |
| MAX1254EVKIT | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 Evaluation Kit/Evaluation System for the MAX1254 MAX1253 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| MAX12553ETL | 制造商:Maxim Integrated Products 功能描述:14-BIT, 65MSPS, 3.3V ADC - Bulk |
| MAX12553ETL+ | 制造商:Maxim Integrated Products 功能描述:ADC SGL PIPELINED 65MSPS 14BIT PARALLEL 40TQFN - Rail/Tube |
| MAX12553ETL+T | 制造商:Maxim Integrated Products 功能描述:ADC SGL PIPELINED 65MSPS 14BIT PARALLEL 40TQFN - Tape and Reel |
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