- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄8615 > ADA4941-1YRZ-RL (Analog Devices Inc)IC DIFF ADC DRIVER 18BIT 8SOIC PDF資料下載
參數(shù)資料
| 型號： | ADA4941-1YRZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 8/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DIFF ADC DRIVER 18BIT 8SOIC |
| 設(shè)計資源： | Converting a Single-Ended Signal with AD7982 Differential PulSAR ADC (CN0032) Converting a Single-Ended Signal with AD7984 Differential PulSAR ADC (CN0033) |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | ADC 驅(qū)動器 |
| 應(yīng)用： | 數(shù)據(jù)采集 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
ADA4941-1
Rev. C | Page 15 of 24
THEORY OF OPERATION
The ADA4941-1 is a low power, single-ended input, differential
output amplifier optimized for driving high resolution ADCs.
Figure 47 illustrates how the ADA4941-1 is typically connected.
The amplifier is composed of an uncommitted amplifier, A1,
driving a precision inverter, A2. The negative input of A1 is
brought out to Pin 1 (FB), allowing for user-programmable
gain. The inverting op amp, A2, provides accurate inversion of
the output of A1, VOP, producing the output signal VON.
1k
1k
RG
RF
RF || RG
500
A2
A1
REF
IN
VREF
2
8
4
5
FB
OUT+
+
–
VOP
1
OUT–
+
–
VON
VIN
VG
05704-
052
Figure 47. Basic Connections (Power Supplies Not Shown)
The voltage applied to the REF pin appears as the output
common-mode voltage. Note that the voltage applied to the
REF pin does not affect the voltage at the OUT+ pin. Because of
this, a differential offset can exist between the outputs, while the
desired output common-mode voltage is present. For example,
when VOP = 3.5 V and VON = 1.5 V, the output common-
mode voltage is equal to 2.5 V, just as it is when both outputs
are at 2.5 V. In the first case, the differential voltage (or offset) is
2.0 V, and in the latter case, the differential voltage is 0 V. When
calculating output voltages, both differential and common-mode
voltages must be considered at the same time to avoid undesired
differential offsets.
BASIC OPERATION
VG and VREF are externally applied voltages. VO, cm is defined
as the output common-mode voltage and VO, dm is defined as
the differential-mode output voltage. The following equations
can be derived from Figure 47:
+
=
G
F
G
F
R
VG
R
VIN
VOP
1
(1)
)
(
2
1
VREF
R
VG
R
VIN
VON
G
F
G
F
+
+
+
=
(2)
)
(
2
1
)
(
2
,
VREF
R
VG
R
VIN
VON
VOP
dm
V
G
F
G
F
O
+
=
=
(3)
VREF
VON
VOP
cm
VO
=
+
=
2
,
(4)
When RF = 0 and RG is removed, Equation 3 simplifies to the
following:
VO, dm = 2(VIN) 2(VREF)
(5)
1k
1k
4.99k
1k
825
500
A2
A1
REF
IN
2
8
4
5
FB
+5V
–5V
VS+
VS–
OUT+
+
–
VOP
1
3
6
OUT–
+
–
VON
VIN
05704-
053
Figure 48. Dual Supply, G = 2.4, Single-Ended-to-Differential Amplifier
Figure 48 shows an example of a dual-supply connection. In this
example, VG and VREF are set to 0 V, and the external RF and
RG network provides a noninverting gain of 1.2 in A1. This
example takes full advantage of the rail-to-rail output stage.
The gain equation is
VOP VON = 2.4(VIN)
(6)
The in-series, 825 resistor combined with Pin 8 compensates
for the voltage error generated by the input offset current of A1.
The linear output range of both A1 and A2 extends to within
200 mV of each supply rail, which allows a peak-to-peak
differential output voltage of 19.2 V on ±5 V supplies.
1k
1k
500
A2
A1
REF
IN
2
8
4
5
FB
+5V
VS+
VS–
OUT+
+
–
VOP
1
3
6
OUT–
+
–
VON
+2.5V
VIN
05704-
054
Figure 49. Single +5V Supply, G=2 Single-Ended-to-Differential Amplifier
Figure 49 shows a single 5 V supply connection with A1 used as
a unity gain follower. The 2.5 V at the REF pin sets the output
common-mode voltage to 2.5 V. The transfer function is then
VOP VON = 2(VIN) 5 V
(7)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADA4941-1YCPZ-RL | IC DIFF ADC DRIVER 18BIT 8-LFCSP |
| LTC6360IMS8E#TRPBF | IC ADC DRIVER TRUE ZERO 8MSOP |
| VI-2T3-IV-F4 | CONVERTER MOD DC/DC 24V 150W |
| LTC6360IDD#TRPBF | IC ADC DRIVER TRUE ZERO 8DFN |
| AD7545AKN | IC DAC 12BIT MULTIPLYING 20-DIP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4950-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power, Selectable Gain Differential ADC Driver, G = 1, 2, 3 |
| ADA4950-1YCP-EBZ | 功能描述:BOARD EVAL FOR ADA4950-1YCP RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| ADA4950-1YCPZ-R2 | 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single ±5.5V/11V 16-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:FIXED GAIN 1,2&3 DIFF ADC DRIVER - Tape and Reel 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single }5.5V/11V 16-Pin LFCSP EP |
| ADA4950-1YCPZ-R7 | 功能描述:IC AMP DIFF LP 114MA 16LFCSP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓(xùn)模塊:Differential Circuit Design Techniques for Communication Applications 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:RF/IF 差分 電路數(shù):1 輸出類型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應(yīng)商設(shè)備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
| ADA4950-1YCPZ-RL | 功能描述:IC AMP DIFF LP 114MA 16LFCSP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。