DIGITAL
參數(shù)資料
型號(hào): XRD87L99AIQ
廠(chǎng)商: Exar Corporation
文件頁(yè)數(shù): 5/24頁(yè)
文件大?。?/td> 0K
描述: IC ADC 10BIT 2MSPS 44PQFP
產(chǎn)品變化通告: Obsolescence Notification 15/Apr/2010
標(biāo)準(zhǔn)包裝: 160
位數(shù): 10
采樣率(每秒): 2M
數(shù)據(jù)接口: 并聯(lián)
功率耗散(最大): 450mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 44-QFP
供應(yīng)商設(shè)備封裝: 44-PQFP(10x10)
包裝: 托盤(pán)
輸入數(shù)目和類(lèi)型: *
XRD87L99
xr
LOW POWER, 2 MSPS, 10-BIT, A/D CONVERTER WITH 8-CHANNEL MUX
REV. 1.0.0
13
1.6
DIGITAL INTERFACES
The logic encodes the outputs of the comparators in-
to a binary code and latches the data in a D-type flip-
flop for output.
The functional equivalent of the XRD87L99 (Figure
14) is composed of:
1. Delay stage (tAP) from the clock to the sampling
phase (fS).
2. An ideal analog switch which samples VIN.
3. An ideal A/D which tracks and converts VIN with
no delay.
4. A series of two DFF's with specified hold (tHLD)
and delay (tDL) times.
tAP, tHLD and tDL are specified in the Electrical Charac-
teristics table.
1.7
POWER DOWN
Figure 15 shows the relationship between the clock,
sampled VIN to output data relationship and the effect
of power down.
FIGURE 14. XRD87L99 FUNCTIONAL EQUIVALENT
CIRCUIT AND INTERFACE TIMING
FIGURE 15. POWER DOWN TIMING DIAGRAM
φ
VIN
S
A/D
XRD8799
CLK
DB9-DB0
N
N+1
N-1
N
t
DL
t
HLD
D
Q
D
Q
DB9-DB0
CLK
VIN
t
AP
N-2 Valid
DB0-DB9
CLK
VIN
PD
IDD, IVREF(+)
SAMPLE
N
SAMPLE
M
SAMPLE
M+1
N-1 Valid
N Valid
M Valid
t
CLKS1
t
CLKH1
t
PD
t
PU
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