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| 型号： | LTC2231CUP#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 135MSPS 64-QFN |
| 标准包装： | 40 |
| 位数： | 10 |
| 采样率（每秒）： | 135M |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 924mW |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-WFQFN 裸露焊盘 |
| 供应商设备封装： | 64-QFN（9x9） |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，双极; 1 个差分，双极 |
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LTC2230/LTC2231
23
22301fb
duty cycle. If the clock is turned off for a long period of
time, the duty cycle stabilizer circuit will require a hundred
clock cycles for the PLL to lock onto the input clock. To use
the clock duty cycle stabilizer, the MODE pin should be
connected to 1/3VDD or 2/3VDD using external resistors.
The lower limit of the LTC2230/LTC2231 sample rate is
determined by droop of the sample-and-hold circuits. The
pipelined architecture of this ADC relies on storing analog
signals on small valued capacitors. Junction leakage will
discharge the capacitors. The specified minimum operat-
ing frequency for the LTC2230/LTC2231 is 1Msps.
Digital Output Modes
The LTC2230/LTC2231 can operate in several digital out-
put modes: LVDS, CMOS running at full speed, and CMOS
demultiplexed onto two buses, each of which runs at half
speed. In the demultiplexed CMOS modes the two buses
(referred to as bus A and bus B) can either be updated on
alternate clock cycles (interleaved mode) or simultaneously
(simultaneous mode). For details on the clock timing, refer
to the timing diagrams.
The LVDS pin selects which digital output mode the part
uses. This pin has a four-level logic input which should be
connected to GND, 1/3VDD, 2/3VDD or VDD. 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
LVDS pin.
APPLICATIO S I FOR ATIO
WU
UU
DIGITAL OUTPUTS
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
22301 F12a
ENC–
1.6V
VTHRESHOLD = 1.6V
ENC+
0.1
μF
LTC2230/
LTC2231
22301 F12b
ENC–
ENC+
130
Ω
3.3V
130
Ω
D0
Q0
MC100LVELT22
LTC2230/
LTC2231
83
Ω
83
Ω
Figure 12a. Single-Ended ENC Drive,
Not Recommended for Low Jitter
Figure 12b. ENC Drive Using a CMOS to PECL Translator
LTC2230/LTC2231
22301 F13a
OVDD
VDD
0.1
μF
43
Ω
TYPICAL
DATA
OUTPUT
OGND
OVDD
0.5V
TO 3.6V
PREDRIVER
LOGIC
DATA
FROM
LATCH
OE
Figure 13a. Digital Output Buffer in CMOS Mode
Table 2. LVDS Pin Function
LVDS
Digital Output Mode
GND
Full-Rate CMOS
1/3VDD
Demultiplexed CMOS, Simultaneous Update
2/3VDD
Demultiplexed CMOS, Interleaved Update
VDD
LVDS
Digital Output Buffers (CMOS Modes)
Figure 13a shows an equivalent circuit for a single output
buffer in the CMOS output mode. Each buffer is powered
by OVDD and OGND, isolated from the ADC power and
ground. The additional N-channel transistor in the output
driver allows operation down to low voltages. The internal
resistor in series with the output makes the output appear
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2231IUP | 制造商:LINER 制造商全称:Linear Technology 功能描述:Electrical Specifications Subject to Change |
| LTC2231IUP#PBF | 功能描述:IC ADC 10BIT 135MSPS 64-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:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC2231IUP#TRPBF | 功能描述:IC ADC 10BIT 135MSPS 64-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| LTC2231UP | 制造商:LINER 制造商全称:Linear Technology 功能描述:10-Bit,170Msps/135Msps ADCs |
| LTC2232 | 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 80Msps Low Power 3V ADC |
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