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參數(shù)資料
| 型號： | OPA2234 |
| 英文描述： | OPA2234 - Low Power. Precision SINGLE-SUPPLY OPERATIONAL AMPLIFIERS |
| 中文描述： | OPA2234 -低功耗。精密單電源運算放大器 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大?。?/td> | 159K |
| 代理商： | OPA2234 |
10
OPA237, 2237, 4237
APPLICATIONS INFORMATION
OPA237 series op amps are unity-gain stable and suitable
for a wide range of general-purpose applications. Power
supply pins should be bypassed with 10nF ceramic capaci-
tors.
OPERATING VOLTAGE
OPA237 series op amps operate from single (+2.7V to
+36V) or dual (
±
1.35V to
±
18V) supplies with excellent
performance. Most behavior remains unchanged through-
out the full operating voltage range. Parameters which
vary significantly with operating voltage are shown in
typical performance curves. Specifications are production
tested with +2.7V, +5V, and
±
15V supplies.
OUTPUT CURRENT AND STABILITY
OPA237 series op amps can drive large capacitive loads.
However, under certain limited output conditions any op
amp may become unstable. Figure 1 shows the region
where the OPA237 has a potential for instability. These
load conditions are rarely encountered, especially for single
supply applications. For example, take the case when a
+5V supply with a 10k
load to V
S
/2 is used. OPA237
series op amps remain stable with capacitive loads up to
4,000pF, if sinking current and up to 10,000pF, if sourcing
current. Furthermore, in single supply applications where
the load is connected to ground, the op amp is only
sourcing current, and as shown in Figure 1, can drive
10,000pF with output currents up to 1.5mA.
FIGURE 1. Stability-Capacitive Load vs Output Current.
FIGURE 2. Low and High-Side Battery Current Sensing.
R
L
10
A1
OPA237
+
R
1
38.3k
R
3
38.3k
R
5
383k
R
6
10k
R
7
9.09k
R
4
20k
R
2
19.1k
A2
OPA237
R
8
100k
R
H
10
I
H
V+
V–
V+
V–
2.7V to ±15V
V+ for A
1
, A
2
–In
+In
–In
+In
V
O
= 10 I
H
R
H
To Load
To Load
V
O
= 10 I
L
R
L
Common-mode range of A2
extends to V– for low-side sensing.
Optional for I
B
Cancellation
(R
7
= R
6
II R
8
)
R
and R
divide down the
common-mode input to A1.
Low-Side
Current Sense
High-Side
Current Sense
Out
Out
NOTE: Low and high-side sensing circuits can be used independently.
V– for A
1
, A
2
I
L
2
0.5
1
1.5
Output Current (mA)
–2
–1.5
–1
–0.5
0
100k
10k
1k
100
10
C
V
S
= +2.7V
V
S
= +5V, ±15V
OPERATION NOT
RECOMMENDED
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| OPA4237UA-250 | Voltage-Feedback Operational Amplifier |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| OPA2234M | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-POWER, PRECISION SINGLE-SUPPLY OPERATIONAL AMPLIFIERS |
| OPA2234MDR | 功能描述:IC OPAMP GP 350KHZ LP 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 特色產品:CMOS Operational Amplifier 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉換速率:1 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:1000µV 電流 - 電源:900µA 電流 - 輸出 / 通道:1mA 電壓 - 電源，單路/雙路(±):5 V ~ 14.5 V，±2.5 V ~ 7.25 V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應商設備封裝:8-SOP 包裝:帶卷 (TR) 產品目錄頁面:1372 (CN2011-ZH PDF) 其它名稱:BD7562SF-E2TR |
| OPA2234P | 制造商:Rochester Electronics LLC 功能描述:OP AMP,DUAL,SINGLE SUPPLY - Bulk |
| OPA2234PA | 功能描述:運算放大器 - 運放 Single Precision RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2234U | 功能描述:運算放大器 - 運放 Low Power Prec Sngl-Sply Oper Amp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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