参数资料
| 型号： | ISL28274FAZ-T7 |
| 厂商： | Intersil |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC INSTR/OP AMP RRIO SGL 16-QSOP |
| 标准包装： | 1 |
| 放大器类型： | 仪表 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.5 V/µs |
| 增益带宽积： | 6MHz |
| 电流 - 输入偏压： | 10pA |
| 电压 - 输入偏移： | 35µV |
| 电流 - 电源： | 120µA |
| 电流 - 输出 / 通道： | 31mA |
| 电压 - 电源，单路/双路(±)： | 2.4 V ~ 5 V，±1.2 V ~ 2.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 1235 (CN2011-ZH PDF) |
| 其它名称： | ISL28274FAZ-T7DKR |
15
FN6345.3
May 14, 2009
Description of Operation and Application
Information
Product Description
The ISL28274 and ISL28474 provide both a micropower
instrumentation amplifier (Amp A) and a low power precision
amplifier (Amp B) in the same package. The amplifiers
deliver rail-to-rail input amplification and rail-to-rail output
swing on a single 2.4V to 5V supply. They also deliver
excellent DC and AC specifications while consuming only
60A typical supply current per amplifier. Because the
instrumentation amplifiers provide an independent pair of
feedback terminals to set the gain and to adjust the output
level, the in-amp achieves high common-mode rejection
ratio regardless of the tolerance of the gain setting resistors.
The instrumentation amplifier is internally compensated for a
minimum closed loop gain of 100 or greater.
Input Protection
The input and feedback terminals have internal ESD
protection diodes to both positive and negative supply rails,
limiting the input voltage to within one diode drop beyond the
supply rails. If overdriving the inputs is necessary, the
external input current must never exceed 5mA. An external
series resistor may be used as a protection to limit excessive
external voltage and current from damaging the inputs.
Pin Descriptions
ISL28274
(16 LD QSOP)
ISL28474
(24 LD QSOP)
PIN NAME
EQUIVALENT
CIRCUIT
DESCRIPTION
1, 9, 13, 14
11, 14
NC
No internal connection
2
1, 24
IA OUT
IA OUT_1
IA OUT_2
Circuit 2
Instrumentation Amplifier output
3
2, 23
IA FB+
IA FB+_1
IA FB+_2
Circuit 1
Instrumentation Amplifier Feedback from non-inverting output
4
3, 22
IA FB-
IA FB-_1
IA FB-_2
Circuit 1
Instrumentation Amplifier Feedback from inverting output
5
4, 21
IA IN-
IA IN-_1
IA IN-_2
Circuit 1
Instrumentation Amplifier inverting input
6
5, 20
IA IN+
IA IN+_1
IA IN+_2
Circuit 1
Instrumentation Amplifier non-inverting input
7
6, 19
DNC
Do Not Connect, Internal connection - Must be left floating
8
18
V-
Circuit 3
Negative power supply
10
8, 17
DNC
Do Not Connect, Internal connection - Must be left floating
11
9, 16
IN+
IN+ 1
IN+ 2
Circuit 1
Amplifier non-inverting input
12
10, 15
IN-
IN- 1
IN- 2
Circuit 1
Amplifier inverting input
15
12, 13
OUT
OUT 1
OUT 2
Circuit 2
Amplifier output
16
7
V+
Circuit 3
Positive power supply
IA = Instrumentation Amplifier
IN-
V+
V-
V+
V-
OUT
CIRCUIT 1
CIRCUIT 2
IN+
V+
V-
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 3
ISL28274, ISL28474
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