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參數(shù)資料
| 型號(hào)： | MAX5426AEUD+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 5/9頁 |
| 文件大小： | 0K |
| 描述： | IC INSTR AMP PROGR PREC 14-TSSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 96 |
| 系列： | * |
| 類型： | * |
| 應(yīng)用： | * |
| 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： | 管件 |
MAX5426
Precision Resistor Network for
Programmable Instrumentation Amplifiers
_______________________________________________________________________________________
5
Detailed Description
The MAX5426 is a precision resistor network with low
temperature drift and high accuracy that performs the
same function as a precision resistor array and CMOS
switches. Operationally, this device consists of fixed
resistors and digitally controlled variable resistors that
provide differential gains of 1, 2, 4, and 8 (see
Functional Diagram). The MAX5426 provides gains
accurate to 0.025% (MAX5426A), 0.09% (MAX5426B)
or 0.5% (MAX5426C).
The MAX5426 is ideal for programmable instrumenta-
tion amplifiers. An offset pin is available to apply a DC
offset voltage to the output of the differential amplifier.
Pin CM is the common-mode input voltage and can be
buffered and connected to the common-mode input of
the instrumentation amplifier (usually the shield of the
input cable to reduce the effects of cable capacitance
and leakage).
Digital Interface Operation
The MAX5426 features a simple two-bit parallel pro-
gramming interface. D1 and D0 program the gain set-
ting according to the Logic-Control Truth Table (see
Table 1). The digital interface is CMOS/TTL logic com-
patible.
Timing Diagram
Figure 3 shows the timing diagram of MAX5426 for two
cases. In case 1, the differential input changes are at
OUT1 and OUT2, while the voltage settling is observed
at FB1 and FB2. The settling time (tSETTLE) is defined
as the time for the output voltage (from the change in
the input) to reach (and stay) within 0.02% of its final
value.
In case 2, the differential inputs (OUT1 and OUT2) are
at constant voltages, while D1 and D0 are varied (for
example from 01 to 10) to make a change in the gain.
No op amps are used in these cases.
Pin Description
PIN
NAME
FUNCTION
1VDD
Positive Power Supply. Bypass VDD to GND with a 0.1F capacitor.
2
GND
Ground
3VSS
Negative Power Supply. Bypass VSS to GND with a 0.1F capacitor.
4
FB2
First Stage Positive Input Terminal Resistor. Connect to the inverting terminal of the second input buffer
(see Figure 1).
5
OUT2
First Stage Positive Output Terminal Resistor. Connect to the output terminal of the second input buffer.
6
OFFSET
Second Stage Offset Terminal. Connect to a DC voltage to offset the output of the differential amplifier.
7
INDIF-
Second Stage Negative Input Terminal Resistor. Connect to the inverting input terminal of the
differential op amp.
8
INDIF+
Second Stage Positive Input Terminal Resistor. Connect to the noninverting input terminal of the
differential op amp.
9
OUT
Second Stage Output Terminal, Final Output Terminal
10
OUT1
First Stage Negative Output Terminal of Resistor. Connect to the output terminal of the first input buffer.
11
FB1
First Stage Negative Input Terminal of Resistor. Connect to the inverting input terminal of the first input
buffer.
12
CM
Common-Mode Voltage. CM is the input common-mode voltage of the instrumentation amplifier.
Typically varies ±1% of input common-mode voltage.
13, 14
D0, D1
Digital Inputs. See Table 1.
DIGITAL INPUTS
D1
D0
GAIN
00
1
01
2
10
4
11
8
Table 1. Logic-Control Truth Table
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5426AEUD+ | 功能描述:儀表放大器 Prec Resistor Net for Prog Inst Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| MAX5426AEUD+T | 功能描述:儀表放大器 Prec Resistor Net for Prog Inst Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| MAX5426AEUD-T | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| MAX5426BEUD | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| MAX5426BEUD+ | 功能描述:儀表放大器 Prec Resistor Net for Prog Inst Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
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