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| 型號： | ISL28248FBZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OP AMP DUAL RRIO 4.5MHZ 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 97 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 2 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 4 V/µs |
| 增益帶寬積： | 4.5MHz |
| -3db帶寬： | 13MHz |
| 電流 - 輸入偏壓： | 1pA |
| 電壓 - 輸入偏移： | 1800µV |
| 電流 - 電源： | 900µA |
| 電流 - 輸出 / 通道： | 75mA |
| 電壓 - 電源，單路/雙路(±)： | 2.4 V ~ 5.5 V，±1.2 V ~ 2.75 V |
| 工作溫度： | -40°C ~ 125°C |
| 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-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1234 (CN2011-ZH PDF) |
12
FN6337.4
September 21, 2010
Applications Information
Introduction
The ISL28148, ISL28248 and ISL28448 are single, dual and
quad channel CMOS rail-to-rail input, output (RRIO)
micropower precision operational amplifiers. The parts are
designed to operate from single supply (2.4V to 5.5V) or dual
supply (±1.2V to ±2.75V). The parts have an input common
mode range that extends 0.25V above the positive rail and
100mV below the negative supply rail. The output can swing
within about 3mV of the supply rails with a 100k
Ω load.
Rail-to-Rail Input
Many rail-to-rail input stages use two differential input pairs,
a long-tail PNP (or PFET) and an NPN (or NFET). Severe
penalties have to be paid for this circuit topology. As the
input signal moves from one supply rail to another, the
operational amplifier switches from one input pair to the
other causing drastic changes in input offset voltage and an
undesired change in magnitude and polarity of input offset
current.
The parts achieve input rail-to-rail operation without
sacrificing important precision specifications and degrading
distortion performance. The devices’ input offset voltage
exhibits a smooth behavior throughout the entire
common-mode input range. The input bias current vs the
common-mode voltage range gives us an undistorted
behavior from typically 100mV below the negative rail and
0.25V higher than the V+ rail.
Rail-to-Rail Output
A pair of complementary MOS devices are used to achieve
the rail-to-rail output swing. The NMOS sinks current to swing
the output in the negative direction. The PMOS sources
current to swing the output in the positive direction. The
devices’ with a 100k
Ω load will swing to within 3mV of the
positive supply rail and within 3mV of the negative supply rail.
Results of Overdriving the Output
Caution should be used when overdriving the output for long
periods of time. Overdriving the output can occur in two ways:
1. The input voltage times the gain of the amplifier exceeds the
supply voltage by a large value or
2. The output current required is higher than the output stage
can deliver. These conditions can result in a shift in the Input
Offset Voltage (VOS) as much as 1V/hr. of exposure under
these condition.
IN+ and IN- Input Protection
All input terminals have internal ESD protection diodes to both
positive and negative supply rails, limiting the input voltage to
within one diode beyond the supply rails. They also contain
back-to-back diodes across the input terminals (“Pin
Descriptions” table - Circuit 1 on page 11). For applications
where the input differential voltage is expected to exceed
2
4
11
V-
Negative supply
Circuit 2
1
1 (A)
7 (B)
1 (A)
7 (B)
8 (C)
14 (D)
OUT
OUT_A
OUT_B
OUT_C
OUT_D
Output
Circuit 3
6
8
4
V+
Positive supply
(See circuit 2)
5-
EN
Chip enable
Circuit 4
Pin Descriptions (Continued)
ISL28148
(6 Ld SOT-23)
ISL28248
(8 Ld SO)
(8 Ld MSOP)
ISL28448
(14 Ld TSSOP)
PIN NAME
FUNCTION
EQUIVALENT CIRCUIT
V+
V-
CAPACITIVELY
COUPLED
ESD CLAMP
V+
V-
OUT
V+
V-
EN
ISL28148, ISL28248, ISL28448
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| ISL28248FBZ-T7 | 功能描述:IC OP AMP DUAL RRIO 4.5MHZ 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:儀表 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:- -3db帶寬:2MHz 電流 - 輸入偏壓:0.5pA 電壓 - 輸入偏移:250µV 電流 - 電源:415µA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:849 (CN2011-ZH PDF) 其它名稱:296-12431-1296-12431-1-NDINA2331AIPWRCT |
| ISL28248FUZ | 功能描述:IC OP AMP DUAL RRIO 4.5MHZ 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
| ISL28248FUZ-T7 | 功能描述:IC OP AMP DUAL RRIO 4.5MHZ 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:儀表 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:- -3db帶寬:2MHz 電流 - 輸入偏壓:0.5pA 電壓 - 輸入偏移:250µV 電流 - 電源:415µA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:849 (CN2011-ZH PDF) 其它名稱:296-12431-1296-12431-1-NDINA2331AIPWRCT |
| ISL28248MSOPEVAL1Z | 功能描述:EVAL BOARD FOR ISL28248 MSOP RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運(yùn)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:- |
| ISL28248SOICEVAL1Z | 功能描述:EVALUATION BOARD ISL28248 8SOIC RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運(yùn)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:- |
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