參數(shù)資料
型號： MAX1246ACEE+T
廠商： Maxim Integrated Products
文件頁數(shù)： 11/25頁
文件大小： 0K
描述： IC ADC 12BIT SERIAL 16-QSOP
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 2,500
位數(shù)： 12
采樣率（每秒）： 133k
數(shù)據(jù)接口： MICROWIRE?，QSPI?，串行，SPI?
轉換器數(shù)目： 1
功率耗散（最大）： 667mW
電壓電源： 單電源
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應商設備封裝： 16-QSOP
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 4 個單端，單極；4 個單端，雙極；2 個差分，單極；2 個差分，雙極
MAX1246/MAX1247
+2.7V, Low-Power, 4-Channel,
Serial 12-Bit ADCs in QSOP-16
______________________________________________________________________________________
19
Lowest Power at Higher Throughputs
Figure 13b shows the power consumption with
external-reference compensation in fast power-down,
with one and four channels converted. The external
4.7F compensation requires a 200s wait after
power-up with one dummy conversion. This circuit
combines fast multi-channel conversion with the lowest
power consumption possible. Full power-down mode
may provide increased power savings in applications
where the MAX1246/MAX1247 are inactive for long
periods of time, but where intermittent bursts of
high-speed conversions are required.
Internal and External References
The MAX1246 can be used with an internal or external
reference voltage, whereas an external reference is
required for the MAX1247. An external reference can
be connected directly at VREF or at the REFADJ pin.
An internal buffer is designed to provide 2.5V at
VREF for both the MAX1246 and the MAX1247. The
MAX1246’s internally trimmed 1.21V reference is buf-
fered with a 2.06 gain. The MAX1247’s REFADJ pin is
also buffered with a 2.00 gain to scale an external 1.25V
reference at REFADJ to 2.5V at VREF.
Internal Reference (MAX1246)
The MAX1246’s full-scale range with the internal refer-
ence is 2.5V with unipolar inputs and ±1.25V with bipo-
lar inputs. The internal reference voltage is adjustable
to ±1.5% with the circuit in Figure 15.
External Reference
With both the MAX1246 and MAX1247, an external ref-
erence can be placed at either the input (REFADJ) or
the output (VREF) of the internal reference-buffer ampli-
fier. The REFADJ input impedance is typically 20k
for
the MAX1246, and higher than 100k
for the MAX1247.
10 0
DIN
REFADJ
VREF
1.21V
0V
2.50V
0V
10 1
1
11
0 0
10 1
FULLPD
FASTPD
NOPD
FULLPD
FASTPD
9ms WAIT
COMPLETE CONVERSION SEQUENCE
tBUFFEN
≈ 200s
τ = RC = 20k x CREFADJ
(ZEROS)
CH1
CH7
(ZEROS)
Figure 14. MAX1246 FULLPD/FASTPD Power-Up Sequence
+3.3V
510k
24k
100k
0.047F
9
REFADJ
MAX1246
Figure 15. MAX1246 Reference-Adjust Circuit
PD1
PD0
DEVICE MODE
0
Full Power-Down
0
1
Fast Power-Down
1
0
Internal Clock
1
External Clock
Table 5. Software Power-Down
and Clock Mode
Table 6. Hard-Wired Power-Down
and Internal Clock Frequency
SHDN
STATE
DEVICE
MODE
REFERENCE
BUFFER
COMPENSATION
INTERNAL
CLOCK
FREQUENCY
1
Enabled
Internal
225kHz
Floating
Enabled
External
1.8MHz
0
Power-Down
N/A
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參數(shù)描述
MAX1246ACPE 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1246ACPE+ 功能描述:模數(shù)轉換器 - ADC 12-Bit 4Ch 133ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1246AEEE 功能描述:模數(shù)轉換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1246AEEE+ 功能描述:模數(shù)轉換器 - ADC 12-Bit 4Ch 133ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1246AEEE+T 功能描述:模數(shù)轉換器 - ADC 12-Bit 4Ch 133ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
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