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參數(shù)資料
| 型號(hào)： | AD526SD |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 13/14頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP PGA 10MA 16CDIP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | 可編程增益 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 24 V/µs |
| -3db帶寬： | 4MHz |
| 電流 - 輸入偏壓： | 50pA |
| 電壓 - 輸入偏移： | 250µV |
| 電流 - 電源： | 10mA |
| 電流 - 輸出 / 通道： | 10mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 16.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 16-CDIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 16-CDIP 側(cè)面銅焊 |
| 包裝： | 管件 |
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AD526
REV. D
–8–
THEORY OF OPERATION
The AD526 is a complete software programmable gain amplifier
(SPGA) implemented monolithically with a drift-trimmed
BiFET amplifier, a laser wafer trimmed resistor network, JFET
analog switches and TTL compatible gain code latches.
A particular gain is selected by applying the appropriate gain
code (see Table I) to the control logic. The control logic turns
on the JFET switch that connects the correct tap on the gain
network to the inverting input of the amplifier; all unselected
JFET gain switches are off (open). The “on” resistance of the
gain switches causes negligible gain error since only the
amplifier’s input bias current, which is less than 150 pA, actu-
ally flows through these switches.
The AD526 is capable of storing the gain code, (latched mode),
B, A0, A1, A2, under the direction of control inputs
CLK and
CS. Alternatively, the AD526 can respond directly to gain code
changes if the control inputs are tied low (transparent mode).
For gains of 8 and 16, a fraction of the frequency compensation
capacitance (C1 in Figure 32) is automatically switched out of
the circuit. This increases the amplifier’s bandwidth and im-
proves its signal settling time and slew rate.
AMPLIFIER
+VS
VIN
N1
N2
C1
C2
OUT
FORCE
OUT
SENSE
–VS
A0
A1
A2
B
CLK
CS
DIGITAL
GND
L
A
T
C
H
E
S
C
O
N
T
R
O
L
O
G
I
C
G = 8
G = 16
ANALOG
GND2
ANALOG
GND1
1k
1.7k
G = 2
G = 4
1.7k
3.4k
1k
14k
RESISTOR
NETWORK
Figure 32. Simplified Schematic of the AD526
TRANSPARENT MODE OF OPERATION
In the transparent mode of operation, the AD526 will respond
directly to level changes at the gain code inputs (A0, A1, A2) if
B is tied high and both
CS and CLK are allowed to float low.
After the gain codes are changed, the AD526’s output voltage
typically requires 5.5
s to settle to within 0.01% of the final
value. Figures 26 to 29 show the performance of the AD526 for
positive gain code changes.
16
15
14
13
12
11
10
9
12
34
56
78
+
–
OUT
FORCE
OUT
SENSE
VOUT
0.1 F
AD526
16
84
21
GAIN NETWORK
A1
A0
CS CLK
A2
B
LOGIC AND LATCHES
–VS
0.1 F
+VS
+5V
A2
A1
A0
VIN
Figure 33. Transparent Mode
LATCHED MODE OF OPERATION
The latched mode of operation is shown in Figure 34. When
either
CS or CLK go to a Logic “1,” the gain code (A0, A1, A2,
B) signals are latched into the registers and held until both
CS
and
CLK return to “0.” Unused CS or CLK inputs should be tied
to ground . The
CS and CLK inputs are functionally and electri-
cally equivalent.
OUT
FORCE
OUT
SENSE
VOUT
0.1 F
–VS
0.1 F
+VS
+5V
A2
A1
A0
VIN
TIMING SIGNAL
16
15
14
13
12
11
10
9
12
34
56
78
+
–
AD526
16
84
21
GAIN NETWORK
A1
A0
CS CLK
A2
B
LOGIC AND LATCHES
Figure 34. Latched Mode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD526SD/883B | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Single ±16.5V 16-Pin SBCDIP Tube 制造商:Rochester Electronics LLC 功能描述:SOFTWARE PROG. GAIN AMP - Bulk |
| AD526SD/883B/QUP-3/GDLS | 制造商:Rochester Electronics LLC 功能描述:AD526SD/883B/QUP-3/GDLS - Bulk |
| AD526SD883B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Software Programmable Gain Amplifier |
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| AD5270BCPZ-100-RL7 | 功能描述:IC RHEOSTAT 5V 50-TP 1024 10CSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
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