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| 型号： | MAX1076CTC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/18页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 1.8MSPS 12-TQFN |
| 标准包装： | 2,500 |
| 位数： | 10 |
| 采样率（每秒）： | 1.8M |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 50mW |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WQFN 裸露焊盘 |
| 供应商设备封装： | 12-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，单极 |
MAX1076/MAX1078
1.8Msps, Single-Supply, Low-Power, True-
Differential, 10-Bit ADCs with Internal Reference
8
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
AIN-
Negative Analog Input
2
REF
Reference Voltage Output. Internal 4.096V reference output. Bypass REF with a 0.01F capacitor and
a 4.7F capacitor to RGND.
3
RGND
Reference Ground. Connect RGND to GND.
4VDD
Positive Analog Supply Voltage (+4.75V to +5.25V). Bypass VDD with a 0.01F capacitor and a 10F
capacitor to GND.
5, 11
N.C.
No Connection
6
GND
Ground. GND is internally connected to EP.
7VL
Positive Logic Supply Voltage (1.8V to VDD). Bypass VL with a 0.01F capacitor and a 10F capacitor
to GND.
8
DOUT
Serial Data Output. Data is clocked out on the rising edge of SCLK.
9
CNVST
Convert Start. Forcing CNVST high prepares the part for a conversion. Conversion begins on the
falling edge of CNVST. The sampling instant is defined by the falling edge of CNVST.
10
SCLK
Serial Clock Input. Clocks data out of the serial interface. SCLK also sets the conversion speed.
12
AIN+
Positive Analog Input
—
EP
Exposed Paddle. EP is internally connected to GND.
Detailed Description
The MAX1076/MAX1078 use an input T/H and succes-
sive-approximation register (SAR) circuitry to convert
an analog input signal to a digital 10-bit output. The
serial interface requires only three digital lines (SCLK,
CNVST, and DOUT) and provides easy interfacing to
microprocessors (Ps) and DSPs. Figure 3 shows the
simplified internal structure for the MAX1076/MAX1078.
True-Differential Analog Input T/H
The equivalent circuit of Figure 4 shows the input archi-
tecture of the MAX1076/MAX1078, which is composed of
a T/H, a comparator, and a switched-capacitor digital-to-
analog converter (DAC). The T/H enters its tracking mode
on the 14th SCLK rising edge of the previous conversion.
Upon power-up, the T/H enters its tracking mode immedi-
ately. The positive input capacitor is connected to AIN+.
The negative input capacitor is connected to AIN-. The
T/H enters its hold mode on the falling edge of CNVST
and the difference between the sampled positive and
negative input voltages is converted. The time required
for the T/H to acquire an input signal is determined by
how quickly its input capacitance is charged. If the input
signal’s source impedance is high, the acquisition time
lengthens. The acquisition time, tACQ, is the minimum
time needed for the signal to be acquired. It is calculated
by the following equation:
tACQ
≥ 8 × (RS + RIN) × 16pF
where RIN = 200
Ω, and RS is the source impedance of
the input signal.
Note: tACQ is never less than 104ns, and any source
impedance below 12
Ω does not significantly affect the
ADC’s AC performance.
Input Bandwidth
The ADC’s input-tracking circuitry has a 20MHz small-
signal bandwidth, making it possible to digitize high-
speed transient events and measure periodic signals
with bandwidths exceeding the ADC’s sampling rate by
using undersampling techniques. To avoid high-fre-
quency signals being aliased into the frequency band
of interest, anti-alias filtering is recommended.
Analog Input Protection
Internal protection diodes that clamp the analog input
to VDD and GND allow the analog input pins to swing
from GND - 0.3V to VDD + 0.3V without damage. Both
inputs must not exceed VDD or be lower than GND for
accurate conversions.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1076ETC | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1076ETC+ | 功能描述:模数转换器 - ADC 10Bit 1.8Msps Single Sply True Diff RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1076ETC+T | 功能描述:模数转换器 - ADC 10Bit 1.8Msps Single Sply True Diff RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1076ETC-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1077 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1.5Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs with Internal Reference |
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