VCM(Pin1):Thispinsetstheoutputcommonmodevoltage <" />
參數(shù)資料
型號: LTC6416CDDB#TRMPBF
廠商: Linear Technology
文件頁數(shù): 3/20頁
文件大?。?/td> 0K
描述: IC ADC BUFFER 16BIT DIFF 10-DFN
標(biāo)準(zhǔn)包裝: 500
放大器類型: 緩沖器
電路數(shù): 1
輸出類型: 差分
轉(zhuǎn)換速率: 3400 V/µs
-3db帶寬: 2GHz
電流 - 輸入偏壓: 5µA
電壓 - 輸入偏移: 500µV
電流 - 電源: 42mA
電流 - 輸出 / 通道: 20mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 3.9 V,±1.35 V ~ 1.95 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 10-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 10-DFN-EP(3x2)
包裝: 帶卷 (TR)
LTC6416
11
6416f
PIN FUNCTIONS
VCM(Pin1):Thispinsetstheoutputcommonmodevoltage
seen at OUT+ and OUTby driving IN+ and INthrough an
internal buffer with a high output resistance of 6k. The VCM
pin has a Thevenin equivalent resistance of approximately
3.8k and can be overdriven by an external voltage. If no
voltage is applied to VCM, it will oat to a default voltage
of approximately 1.25V on a 3.3V supply or 1.36V on
a 3.6V supply. The VCM pin should be bypassed with a
high-quality ceramic bypass capacitor of at least 0.1μF.
CLHI (Pin 2): High Side Clamp Voltage. The voltage applied
to the CLHI pin denes the upper voltage limit of the OUT+
and OUTpins. This voltage should be set at least 300mV
above the upper voltage range of the driven ADC. On a 3.3V
supply, the CLHI pin will oat to a 2.23V default voltage.
On a 3.6V supply, the CLHI pin will oat to a 2.45V default
voltage. CLHI has a Thevenin equivalent of approximately
4.1kΩ and can be overdriven by an external voltage. The
CLHI pin should be bypassed with a high-quality ceramic
bypass capacitor of at least 0.1μF.
IN+,IN(Pins 3, 4):
Non-inverting and inverting input pins
of the buffer, respectively. These pins are high impedance,
approximately 6kΩ. If AC-coupled, these pins will self bias
to the voltage present at the VCM pin.
CLLO (Pin 5): Low Side Clamp Voltage. The voltage ap-
plied to the CLLO pin denes the lower voltage limit of
the OUT+ and OUTpins. This voltage should be set at
least 300mV below the lower voltage range of the driven
ADC. On a 3.3V supply, the CLLO pin will oat to a 0.25V
default voltage. On a 3.6V supply, the CLLO pin will oat to
a 0.265V default voltage. CLLO has a Thevenin equivalent
resistance of approximately 2.3k and can be overdriven by
an external voltage. The CLLO pin should be bypassed with
a high quality ceramic bypass capacitor of at least 0.1μF.
GND (Pins 6, 9, 11): Negative power supply, normally
tied to ground. Both pins and the exposed paddle must
be tied to the same voltage. GND may be tied to a voltage
other than ground as long as the voltage between V+ and
GND is 2.7V to 4V. If the GND pins are not tied to ground,
bypass them with 680pF and 0.1μF capacitors as close to
the package as possible.
OUT, OUT+ (Pins 7, 8):
Outputs. The LTC6416 outputs
are low impedance. Each output has an output impedance
of approximately 9Ω at DC.
V+ (Pin 10):
Positive Power Supply. Typically 3.3V to 3.6V.
Split supplies are possible as long as the voltage between
V+ and GND is 2.7V to 4V. Bypass capacitors of 680pF
and 0.1μF as close to the part as possible should be used
between the supplies.
Exposed Pad (Pin 11): Ground. The exposed pad must
be soldered to the printed circuit board ground plane for
good heat transfer. If GND is a voltage other than ground,
the Exposed Pad must be connected to a plane with the
same potential as the GND pins – Not to the system
ground plane.
DC TEST CIRCUIT SCHEMATIC
8
1
2
3
4
5
6
9
11
7
CLOAD
V+
10
OUT
6416 DC
OUT+
OUT
OUT+
RLOAD
VCM
IN+
CLHI
CLLO
IN
LTC6416
VINDIFF = IN
+ – IN
IN+ + IN
2
VINCM =
VOUTDIFF = OUT
+ – OUT
OUT+ + OUT
2
VOUTCM =
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