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参数资料
| 型号： | MAX1989MEE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/17页 |
| 文件大小： | 497K |
| 描述： | IC TEMP SENSOR REMOTE 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 功能： | 温度计，恒温计 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -55°C ~ 125°C，外部传感器 |
| 精确度： | ±3.5°C 本地（最大），±5°C 远程（最大） |
| 拓扑： | ADC，比较器，多路复用器，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
Multichannel Remote/Local
Temperature Sensors
6 _______________________________________________________________________________________
_______________Detailed Description
The MAX1668/MAX1805/MAX1989 are temperature
sensors designed to work in conjunction with an exter-
nal microcontroller (礐) or other intelligence in thermo-
static, process-control, or monitoring applications. The
礐 is typically a power-management or keyboard con-
troller, generating SMBus serial commands by bit-
banging general-purpose input-output (GPIO) pins or
through a dedicated SMBus interface block.
These devices are essentially 8-bit serial analog-to-digi-
tal converters (ADCs) with sophisticated front ends.
However, the MAX1668/MAX1805/MAX1989 also contain
a switched current source, a multiplexer, an ADC, an
SMBus interface, and associated control logic (Figure 1).
In the MAX1668 and MAX1989, temperature data from
the ADC is loaded into five data registers, where it is
automatically compared with data previously stored in
10 over/undertemperature alarm registers. In the
MAX1805, temperature data from the ADC is loaded into
three data registers, where it is automatically compared
with data previously stored in six over/undertemperature
alarm registers.
ADC and Multiplexer
The ADC is an averaging type that integrates over a
64ms period (each channel, typical), with excellent
noise rejection.
The multiplexer automatically steers bias currents
through the remote and local diodes, measures their
forward voltages, and computes their temperatures.
Each channel is automatically converted once the con-
version process has started. If any one of the channels
is not used, the device still performs measurements on
these channels, and the user can ignore the results of
the unused channel. If any remote-diode channel is
unused, connect DXP_ to DXN_ rather than leaving the
pins open.
The DXN_ input is biased at 0.65V above ground by an
internal diode to set up the A/D inputs for a differential
measurement. The worst-case DXP_ to DXN_ differential
input voltage range is 0.25V to 0.95V.
Excess resistance in series with the remote diode caus-
es about +0.5癈 error per ohm. Likewise, 200礦 of offset
voltage forced on DXP_ to DXN_ causes about 1癈 error.
MAX1668/
MAX1989
FUNCTION
1, 3, 5, 7
DXP_
Combined Current Source and A/D Positive Input for Remote-Diode Channel. Do not
leave DXP floating; connect DXP to DXN if no remote diode is used. Place a 2200pF
capacitor between DXP and DXN for noise filtering.
PIN
12
ALERT
SMBus Alert (Interrupt) Output, Open Drain
11
ADD0
SMBus Slave Address Select Pin
10
ADD1
SMBus Address Select Pin (Table 8). ADD0 and ADD1 are sampled upon power-up.
Excess capacitance (>50pF) at the address pins when floating can cause address-
recognition problems.
15
STBY
Hardware Standby Input. Temperature and comparison threshold data are retained in
standby mode. Low = standby mode, high = operate mode.
14
SMBCLK
SMBus Serial-Clock Input
13
SMBDATA
SMBus Serial-Data Input/Output, Open Drain
1, 3
12
11
10
15
14
13
Pin Description
NAME
MAX1805
2, 4, 6, 8
DXN_
Combined Current Sink and A/D Negative Input. DXN is normally biased to a diode volt-
age above ground.
2, 4
9
V
CC
Supply Voltage Input, 3V to 5.5V. Bypass to GND with a 0.1礔 capacitor. A 200& series
resistor is recommended but not required for additional noise filtering.
9
16
GND
Ground
16
N.C.
No Connection. Not internally connected. Can be used for PC board trace routing.
58
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1989MEE/GG8 | 制造商:Maxim Integrated Products 功能描述:MULTICHANNEL REMOTE/LOCAL TEMPERATURE SENSOR - Rail/Tube |
| MAX1989MEE+ | 功能描述:板上安装温度传感器 MultiCh Remote Local Sensor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX1989MEE+T | 功能描述:板上安装温度传感器 MultiCh Remote Local Sensor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX1989MEE-T | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX1989MEE-TG11 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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