收藏本站
LTC2234
18
2234fa
DIGITAL OUTPUTS
Table 1 shows the relationship between the analog input
voltage, the digital data bits and the overflow bit.
APPLICATIO S I FOR ATIO
WU
UU
LTC2234
2234 F13
OVDD
VDD
0.1
F
43
TYPICAL
DATA
OUTPUT
OGND
OVDD
0.5V
TO 3.6V
PREDRIVER
LOGIC
DATA
FROM
LATCH
OE
Figure 13. Digital Output Buffer
Digital Output Buffers
Figure 13 shows an equivalent circuit for a single output
buffer. Each buffer is powered by OVDD and OGND, which
are isolated from the ADC power and ground. The addi-
tional N-channel transistor in the output driver allows
operation down to voltages as low as 0.5V. The internal
resistor in series with the output makes the output appear
as 50
to external circuitry and may eliminate the need for
external damping resistors.
2234 F12a
ENC–
1.6V
VTHRESHOLD = 1.6V
ENC+
0.1
F
LTC2234
2234 F12b
ENC–
ENC+
130
3.3V
130
D0
Q0
MC100LVELT22
LTC2234
83
83
Figure 12a. Single-Ended ENC Drive,
Not Recommended for Low Jitter
Figure 12b. ENC Drive Using a CMOS to PECL Translator
Table 2. MODE Pin Function
Clock Duty
MODE Pin
Output Format
Cycle Stablizer
0
Offset Binary
Off
1/3VDD
Offset Binary
On
2/3VDD
2’s Complement
On
VDD
2’s Complement
Off
As with all high speed/high resolution converters, the
digital output loading can affect the performance. The
digital outputs of the LTC2234 should drive a minimal
capacitive load to avoid possible interaction between the
digital outputs and sensitive input circuitry. For full speed
operation the capacitive load should be kept under 5pF.
Lower OVDD voltages will also help reduce interference
from the digital outputs and improve the SNR.
Data Format
The LTC2234 parallel digital output can be selected for
offset binary or 2’s complement format. The format is
selected with the MODE pin. Connecting MODE to GND or
1/3VDD selects offset binary output format. Connecting
MODE to 2/3VDD or VDD selects 2’s complement output
format. An external resistor divider can be used to set the
1/3VDD or 2/3VDD logic values. Table 2 shows the logic
states for the MODE pin.
Table 1. Output Codes vs Input Voltage
AIN+ – AIN–
D9 – D0
(2V Range)
OF
(Offset Binary)
(2’s Complement)
>+1.000000V
1
11 1111 1111
01 1111 1111
+0.998047V
0
11 1111 1111
01 1111 1111
+0.996094V
0
11 1111 1110
01 1111 1110
+0.001953V
0
10 0000 0001
00 0000 0001
0.000000V
0
10 0000 0000
00 0000 0000
–0.001953V
0
01 1111 1111
11 1111 1111
–0.003906V
0
01 1111 1110
11 1111 1110
–0.998047V
0
00 0000 0001
10 0000 0001
–1.000000V
0
00 0000 0000
10 0000 0000
<–1.000000V
1
00 0000 0000
10 0000 0000
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
LTC2237IUH#TRPBF IC ADC 10BIT 40MSPS 3V 32-QFN
LTC2239CUH#PBF IC ADC 10-BIT 80MSPS 3V 32-QFN
LTC2240CUP-12#PBF IC ADC 12BIT 170MSPS 64-QFN
LTC2240IUP-10#PBF IC ADC 10BIT 170MSPS 64-QFN
LTC2241IUP-10#PBF IC ADC 10BIT 210MSPS 64-QFN
LTC2242IUP-10#PBF IC ADC 10BIT 250MSPS 64-QFN
LTC2245IUH#TRPBF IC ADC 14BIT 10MSPS 3V 32-QFN
LTC2249IUH#TRPBF IC ADC 14BIT 80MSPS LP 32-QFN
相关代理商/技术参数
LTC2234UK 制造商:LINER 制造商全称:Linear Technology 功能描述:10-Bit, 135Msps ADC
LTC2236 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 80Msps Low Power 3V ADC
LTC2236CUH 制造商:LINER 制造商全称:Linear Technology 功能描述:10-Bit, 65/40/25Msps Low Noise 3V ADCs
LTC2236CUH#PBF 功能描述:IC ADC 10-BIT 25MSPS 3V 32-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6
LTC2236CUH#TRPBF 功能描述:IC ADC 10BIT 25MSPS 3V 32-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 电压电源:单电源 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
LTC2236CUHPBF 制造商:Linear Technology 功能描述:ADC 10-Bit 25Msps Low Noise 3V QFN32
LTC2236IUH 制造商:LINER 制造商全称:Linear Technology 功能描述:10-Bit, 65/40/25Msps Low Noise 3V ADCs
LTC2236IUH#PBF 功能描述:IC ADC 10-BIT 25MSPS 3V 32-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6