- 您现在的位置：买卖IC网 > PDF目录20157 > MAX1491CAI+T (Maxim Integrated)IC ADC W/LCD DRIVER 28-SSOP PDF资料下载
参数资料
| 型号： | MAX1491CAI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 20/25页 |
| 文件大小： | 0K |
| 描述： | IC ADC W/LCD DRIVER 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 显示器类型： | LCD |
| 配置： | 7 段 + 2 个信号器 |
| 数字或字符： | A/D，3.5 位数字 |
| 电流 - 电源： | 980µA |
| 电源电压： | 2.7 V ~ 5.25 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
LCD
1---
1999
2
1
0
-0
-1
-2
-1999
-1---
LCD
1---
1999
2
1
0
-0
-1
-2
-1999
-1---
-200mV
-100 μ V 0 100 μ V
+200mV
-2V
-1mV 0 1mV
+2V
ANALOG INPUT VOLTAGE
Figure 17. MAX1491 Transfer Function ±200mV Range
Supplies, Layout, and Bypassing
Power up AV DD and DV DD before applying an analog
input and external reference voltage to the device. If
this is not possible, limit the current into these inputs to
50mA. Isolate the digital supply from the analog supply
with a low-value resistor (10 ? ) or ferrite bead when the
analog and digital supplies come from the same
source. For best performance, ground the MAX1491/
MAX1493/MAX1495 to the analog ground plane of the
circuit board.
Avoid running digital lines under the device, because
these may couple noise onto the die. Run the analog
ground plane under the MAX1491/MAX1493/MAX1495
to minimize coupling of digital noise. Make the power-
supply lines to the MAX1491/MAX1493/MAX1495 as
wide as possible to provide low-impedance paths and
reduce the effects of glitches on the power-supply line.
Shield fast-switching signals, such as clocks, with digital
ground to avoid radiating noise to other sections of the
board. Avoid running clock signals near the analog
inputs. Avoid crossover of digital and analog signals.
Running traces that are on opposite sides of the board at
right angles to each other reduces feedthrough effects.
Good decoupling is important when using high-resolu-
tion ADCs. Decouple the supplies with 4.7μF and 0.1μF
ceramic capacitors to GND. Place these components
as close to the device as possible to achieve the
best decoupling.
Refer to the MAX1494 evaluation kit manual for the rec-
ommended layout. The evaluation board package
includes a fully assembled and tested evaluation board.
ANALOG INPUT VOLTAGE
Figure 18. MAX1491 Transfer Function ±2V Range
Definitions
INL
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
straight line is either a best-straight-line fit or a line
drawn between the end points of the transfer function,
once offset and gain errors have been nullified. INL for
the MAX1491/MAX1493/MAX1495 is measured using
the end-point method.
DNL
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of one count. A
DNL error specification of less than one count guarantees
no missing counts and a monotonic transfer function.
Rollover Error
Rollover error is defined as the absolute value differ-
ence between a near-positive full-scale reading and
near-negative full-scale reading. Rollover error is tested
by applying a full-scale positive voltage, swapping
AIN+ and AIN-, and then adding the results.
Zero Input Reading
Ideally, with AIN+ connected to AIN-, the MAX1491/
MAX1493/MAX1495 display a zero. Zero input reading
is the measured deviation from the ideal zero and the
actual measured point.
20
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| VE-2TX-EV-F4 | CONVERTER MOD DC/DC 5.2V 150W |
| RCB11DHND | CONN EDGECARD 22POS DIP .050 SLD |
| R2S12-0515/P-R | CONV DC/DC 2W 5VIN 15VOUT SMD |
| VE-2TX-EV-F3 | CONVERTER MOD DC/DC 5.2V 150W |
| VE-2TX-EV-F2 | CONVERTER MOD DC/DC 5.2V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1491CNI | 功能描述:模数转换器 - 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 |
| MAX1491CNI+ | 功能描述:模数转换器 - ADC 3.5 Digit ADC w/LCD Drivers 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 |
| MAX14920ECB+ | 功能描述:电池管理 12/16Cell Measurement AFE RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX14920ECB+T | 功能描述:电池管理 12/16Cell Measurement AFE RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX14921ECS+ | 功能描述:电池管理 16Cell Measurement AFE RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。