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LM15851 数据表(PDF) 4 Page - Texas Instruments

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部件名 LM15851
功能描述  Ultra-Wideband RF Sampling Subsystem
Download  87 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM15851 数据表(HTML) 4 Page - Texas Instruments

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VIN+
VIN
±
VCM
To T&H+
To T&H
±
50
Ÿ
50
Ÿ
20 k
Ÿ
LPEAK
LPEAK
VA19
GND
VA19
GND
GND
VA19
VCM
Tdiode+
Tdiode±
GND
VA19
VBIAS
LM15851
SLAS990D – JANUARY 2014 – REVISED JULY 2015
www.ti.com
Pin Functions
PIN
EQUIVALENT CIRCUIT
TYPE
DESCRIPTION
NAME
NO.
ANALOG
RBIAS+
1
External Bias Resistor Connections
External bias resistor terminals. A 3.3 k
Ω (±0.1%) resistor should be connected
between RBIAS+ and RBIAS–. The RBIAS resistor is used as a reference for
I/O
internal circuits which affect the linearity of the converter. The value and precision
RBIAS–
2
of this resistor should not be compromised. These pins must be isolated from all
other signals and grounds.
TDIODE–
63
Temperature Diode
These pins are the positive (anode) and negative (cathode) diode connections for
Passive
die temperature measurements. Leave these pins unconnected if they are not
TDIODE+
64
used. See the Built-In Temperature Monitor Diode section for more details.
Bandgap Output Voltage
This pin is capable of sourcing or sinking 100
μA and can drive a load up to 80 pF.
VBG
68
O
Leave this pin unconnected if it is not used in the application. See the The
Reference Voltage section for more details.
Common Mode Voltage
The voltage output at this pin must be the common-mode input voltage at the VIN+
VCMO
3
O
and VIN– pins when DC coupling is used. This pin is capable of sourcing or sinking
100
μA and can drive a load up to 80 pF. Leave this pin unconnected if it is not
used in the application.
VIN+
8
Signal Input
The differential full-scale input range is determined by the full-scale voltage adjust
I
register. An internal peaking inductor (LPEAK) of 5 nH is included for parasitic
VIN–
9
compensation.
4
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