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參數(shù)資料
| 型號： | ISL55211IRTZ-T7A |
| 廠商： | Intersil |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP DIFF LOW NOISE 16TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Solutions for Test and Measurement Equipment |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 差分 |
| 轉(zhuǎn)換速率： | 5600 V/µs |
| -3db帶寬： | 1.6GHz |
| 電流 - 輸入偏壓： | 50µA |
| 電壓 - 輸入偏移： | 100µV |
| 電流 - 電源： | 35mA |
| 電流 - 輸出 / 通道： | 45mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 4.2 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN（3x3） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | ISL55211IRTZ-T7ADKR |
ISL55211
16
FN7868.0
June 21, 2011
2. AC-coupled, higher frequency range interstage filter design.
valued inductors and implements the filter just using shunt
resistors at the end of the RLC filter. In this case, the ADC VCM
can be tied to the centerpoint of the bias path inductors (very
much like a Bias-T) to provide the common mode voltage and
current to the ADC inputs. These bias inductors do limit the
low frequency end of the operation where, with 1H values,
operation from 10MHz to 200MHz is supported using the
approach of Figure 37.
3. AC-coupled with output side transformer. This design includes
an output side transformer, very similar to ADC
characterization circuits. This approach allows a slightly lower
amplifier output swing (if N>1 is used) and very easy 2nd or
3rd order low pass responses to be implemented. It also
provides the ICM and VCM bias to the ADC through the
transformer centertap. This approach would be attractive for
higher ADC input swing targets and more aggressive noise
example showing this approach.
4. DC-coupled with ADC VCM and ICM provided from the
amplifier. Here, DC to very high frequency interstage low pass
filter can be provided. Again, the RS element must be low to
reduce the IR drop from the VCM of the converter, which now
shows up on the output of the ISL55211, to the ADC input
pins.
FIGURE 36. AC- COUPLED BROADBAND RLC INTERSTAGE FILTER
DESIGN
RT
ICM
CT
RIN
CIN
ADC
s
t
R
>
LS
VB
2
cm
t
cm
b
V
R
I
V
=
×
IN+
IN-
ISL55211
VCM1
RS
+3.3V
1.2V
CB
VCM2
FIGURE 37. AC-COUPLED, HIGHER FREQUENCY RLC INTERSTAGE
FILTER DESIGN
RT
CT
RIN
CIN
ADC
IN+
IN-
LS
LP
ISL55211
VCM1
RS
+3.3V
1.2V
CB
ICM
VCM2
s
L
Lp
>>
FIGURE 38. AC-COUPLED WITH OUTPUT SIDE TRANSFORMER
2ICM
ISL55211
VCM1
RS
+3.3V
1.2V
CB
RT
ICM
CT
RIN
CIN
ADC
VCM2
IN+
IN-
1:N
RT<30
FIGURE 39. DC-COUPLED WITH A VCM VOLTAGE FROM THE ADC
Ω
≤30
s
R
RT
ICM
CT
RIN
CIN
ADC
VCM2
LS
IN+
IN-
ISL55211
VCM
RS
+3.3V
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