参数资料
型号: ADS62C17IRGCR
厂商: Texas Instruments
文件页数: 44/68页
文件大小: 0K
描述: IC ADC 11BIT SRL/PAR 200M 64VQFN
标准包装: 2,000
位数: 11
采样率(每秒): 200M
数据接口: 串行,并联
转换器数目: 2
功率耗散(最大): 1.1W
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘
供应商设备封装: 64-VQFN 裸露焊盘(9x9)
包装: 带卷 (TR)
输入数目和类型: 2 个差分,单极
A7
A6
A1
A0
D7
D6
D1
D0
Register address = 0x59
Register data = 0x01
SDATA
SCLK
SEN
CLKM
CLKP
N-26
Output
Data
clock
cycle 1
clock
cycle 9
clock
cycle 10
N-25
Serial register write to enable SNRBoost
10 clock cycles after the 16
th SCLK
falling edge, the device starts
giving out valid SNRBoost data
Valid SNRBoost
data starts
N-1
N
N+1
Analog
Input
Signal
CLOCK INPUT
www.ti.com ............................................................................................................................................................. SLAS631A – APRIL 2009 – REVISED JULY 2009
Table 10. Positioning the Corner Frequency (Some Examples)
SNRBoost Coefficient1,
Normalized Corner
SNRBoost Coefficient1,
Normalized Corner
Center Frequency
Frequency1
Frequency2
<SNRBoost Coeff1>
<SNRBoost Coeff2>
(f/fs)
0
0.250
0
0.250
Fs × 0.25
F
0.230
1
0.270
Fs × 0.25
6
0.385
2
0.290
Fs × 0.3375
D
0.189
B
0.143
Fs × 0.166
9
0.080
7
0.420
Fs × 0.25
Figure 52. SNRBoost Active Delay
SNRBoost does not introduce any group delay in the input signal path. The ADC latency increases by four clock
cycle (to 26 clock cycles). When it is enabled using the serial interface, the mode becomes fully active 10 input
clock cycles after the 16th SCLK falling edge. When it is disabled, normal data (without SNRBoost) resumes after
6 clock cycle.
ADS62C17 clock inputs can be driven differentially (sine, LVPECL or LVDS) or single-ended (LVCMOS), with
little or no difference in performance between them. The common-mode voltage of the clock inputs is set to VCM
using internal 5-k
resistors as shown in Figure 53. This allows using transformer-coupled drive circuits for sine
wave clock or ac-coupling for LVPECL, LVDS clock sources (Figure 54 and Figure 55).
Copyright 2009, Texas Instruments Incorporated
49
Product Folder Link(s): ADS62C17
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