參數(shù)資料
型號: ADS1232IPWR
廠商: Texas Instruments
文件頁數(shù): 7/39頁
文件大?。?/td> 0K
描述: IC ADC 24-BIT 10/80SPS 24-TSSOP
產(chǎn)品培訓(xùn)模塊: Data Converter Basics
視頻文件: Nuts and Bolts of the Delta-Sigma Converter
標(biāo)準(zhǔn)包裝: 1
位數(shù): 24
采樣率(每秒): 10,80
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 13.1mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 標(biāo)準(zhǔn)包裝
輸入數(shù)目和類型: 4 個單端,單極;2 個差分,雙極
其它名稱: 296-25894-6
www.ti.com
Z
EFF
+
1
(2)(76.8kHz)(13fF)
+ 500MW
CLK_DETECT
Internal
Oscillator
MUX
ToADC
S
S0
S1
EN
Crystal
Oscillator
CLKIN/XTAL1
XTAL2
AVDD
(1) f
MOD = 76.8kHz
Z
EFF = 500M
(1)
VREFP
VREFN
AVDD
ESD
Protection
C
BUF
CLOCK SOURCES
SBAS350F – JUNE 2005 – REVISED FEBRUARY 2008
Figure 29. Equivalent Circuitry of the Clock
Source
When the clock source is a crystal, simply connect
the 4.9152MHz crystal across the CLKIN/XTAL1 and
XTAL2 pins. Table 6 shows the recommended part
numbers. Due to the low-power design of the parallel
resonant
driver
circuitry
onboard,
both
the
Figure 28. Simplified Reference Input Circuitry
CLKIN/XTAL1 and XTAL2 pins are only for use with
external crystals; they should not be used as clock
output drivers for external circuitry. No external
ESD diodes protect the reference inputs. To prevent
capacitors
are
used
with
the
crystal;
it
is
these diodes from turning on, make sure the voltages
recommended to place the crystal close to the part in
on the reference pins do not go below GND by more
order to reduce board stray capacitance for both the
than 100mV, and likewise, do not exceed AVDD by
CLKIN/XTAL1 and XTAL2 pins and to insure proper
100mV:
operation.
GND – 100mV < (REFP or REFN) < AVDD + 100mV
Table 6. Recommended Crystals
MANUFACTURER
FREQUENCY
PART NUMBER
The ADS1232/4 can use an external clock source,
ECS
4.9152MHz
ECS-49-20-1
external crystal, or internal oscillator to accommodate
ECS
4.9152MHz
ECS-49-20-4
a wide variety of applications. Figure 29 shows the
equivalent
circuitry
of
the
clock
source.
The
CLK_DETECT block determines whether the crystal
An external oscillator may be used by driving the
oscillator/external clock signal is applied to the
CLKIN/XTAL1
pin
directly.
The
Electrical
CLKIN/XTAL1 pin so that the internal oscillator is
Characteristics table shows the allowable frequency
bypassed or activated. When the CLKIN/XTAL1 pin
range.
frequency is above ~200kHz, the CLK_DETECT
output goes low and shuts down the internal
oscillator. When the XIN pin frequency is below
~200kHz, the CLK_DETECT output goes high and
activates
the
internal
oscillator.
It
is
highly
recommended to hard-wire the CLKIN/XTAL1 pin to
ground when the internal oscillator is chosen.
Copyright 2005–2008, Texas Instruments Incorporated
15
Product Folder Link(s): ADS1232 ADS1234
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