參數(shù)資料
型號(hào)： MAX1268BEEG+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 19/19頁(yè)
文件大?。?/td> 0K
描述： IC ADC 12BIT 420KSPS 24-QSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 50
位數(shù)： 12
采樣率（每秒）： 420k
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 10mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 24-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 24-QSOP
包裝： 管件
輸入數(shù)目和類型： 2 個(gè)單端，單極；2 個(gè)單端，雙極；1 個(gè)偽差分，單極；1 個(gè)偽差分，雙極
產(chǎn)品目錄頁(yè)面： 1396 (CN2011-ZH PDF)
MAX1266/MAX1268
420ksps, +5V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
_______________________________________________________________________________________
9
BIT
PD1, PD0
0
D7, D6
PD1 and PD0 select the various clock and power-down modes.
Full power-down mode. Clock mode is unaffected.
D5
ACQMOD
ACQMOD = 0: Internal acquisition mode
ACQMOD = 1: External acquisition mode
NAME
FUNCTIONAL DESCRIPTION
0
1
0
Standby power-down mode. Clock mode is unaffected.
0
1
Normal operation mode. External clock mode selected.
1
Normal operation mode. Internal clock mode selected.
D4
SGL/DIF
SGL/DIF = 0: Pseudo-differential analog input mode
SGL/DIF = 1: Single-ended analog input mode
In single-ended mode, input signals are referred to COM. In pseudo-differential mode, the voltage
difference between two channels is measured (Tables 2 and 4).
D3
UNI/BIP
UNI/BIP = 0: Bipolar mode
UNI/BIP = 1: Unipolar mode
In unipolar mode, an analog input signal from 0V to VREF can be converted; in bipolar mode, the
signal can range from -VREF/2 to +VREF/2.
D2, D1, D0
A2, A1, A0
Address bits A2, A1, A0 select which of the 6/2 (MAX1266/MAX1268) channels is to be converted
(Tables 2 and 3).
Table 1. Control-Byte Functional Description
Single-Ended and
Pseudo-Differential Operation
The sampling architecture of the ADC’s analog com-
parator is illustrated in the equivalent input circuits of
Figure 3. In single-ended mode, IN+ is internally
switched to channels CH0–CH5 for the MAX1266
(Figure 3a) and to CH0–CH1 for the MAX1268 (Figure
3b), while IN- is switched to COM (Table 2). In differen-
tial mode, IN+ and IN- are selected from analog input
pairs (Table 3) and are internally switched to either of
the analog inputs. This configuration is pseudo-differen-
tial to the effect that only the signal at IN+ is sampled.
The return side (IN-) must remain stable within ±0.5
LSB (±0.1 LSB for best performance) with respect to
GND during a conversion. To accomplish this, connect
a 0.1F capacitor from IN- (the selected input) to GND.
Figure 3a. MAX1266 Simplified Input Structure
Figure 3b. MAX1268 Simplified Input Structure
CH0
CH1
CH3
CH2
CH5
CH4
COM
CSWITCH
TRACK
T/H
SWITCH
RIN
800
CHOLD
12pF
HOLD
12-BIT CAPACITIVE DAC
VREF
ZERO
COMPARATOR
–
+
SINGLE-ENDED MODE: IN+ = CH0–CH5, IN- = COM
DIFFERENTIAL MODE: IN+ AND IN- SELECTED FROM PAIRS
CH0/CH1, CH2/CH3, AND CH4/CH5
AT THE SAMPLING INSTANT,
THE MUX INPUT SWITCHES
FROM THE SELECTED IN+
CHANNEL TO THE SELECTED
IN- CHANNEL.
INPUT
MUX
CH0
CH1
COM
CSWITCH
TRACK
T/H
SWITCH
RIN
800
HOLD
ZERO
COMPARATOR
–
+
SINGLE-ENDED MODE: IN+ = CH0–CH1, IN- = COM
DIFFERENTIAL MODE: IN+ AND IN- SELECTED FROM PAIR
CH0/CH1
AT THE SAMPLING INSTANT,
THE MUX INPUT SWITCHES
FROM THE SELECTED IN+
CHANNEL TO THE SELECTED
IN- CHANNEL.
INPUT
MUX
CHOLD
12pF
12-BIT CAPACITIVE DAC
VREF
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1268BEEG+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 2Ch 420ksps 5.5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1268BEEG+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 2Ch 420ksps 5.5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1268BEEG-T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX126ACAX 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX126ACAX+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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