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參數(shù)資料
| 型號： | MAX1184ECM+D |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 6/21頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 20MSPS DUAL 48-TQFP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 20M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 功率耗散（最大）： | 150mW |
| 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： | 48-TQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-TQFP 裸露焊盤（7x7） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 4 個單端，雙極；2 個差分，雙極 |
| 產(chǎn)品目錄頁面： | 1396 (CN2011-ZH PDF) |
MAX1184
Dual 10-Bit, 20Msps, 3V, Low-Power ADC with
Internal Reference and Parallel Outputs
14
______________________________________________________________________________________
Table 1. MAX1184 Output Codes For Differential Inputs
*VREF = VREFP - VREFN
DIFFERENTIAL INPUT
VOLTAGE*
DIFFERENTIAL
INPUT
STRAIGHT OFFSET
BINARY
T/B = 0
TWO’S COMPLEMENT
T/B = 1
VREF x 511/512
+FULL SCALE - 1LSB
11 1111 1111
01 1111 1111
VREF x 1/512
+ 1 LSB
10 0000 0001
00 0000 0001
0
Bipolar Zero
10 0000 0000
00 0000 0000
- VREF x 1/512
- 1 LSB
01 1111 1111
11 1111 1111
-VREF x 511/512
- FULL SCALE + 1 LSB
00 0000 0001
10 0000 0001
-VREF x 512/512
- FULL SCALE
00 0000 0000
10 0000 0000
The output coding can be chosen to be either straight
offset binary or two’s complement (Table 1) controlled
by a single pin (T/B). Pull T/B low to select offset binary
and high to activate two’s complement output coding.
The capacitive load on the digital outputs D0A–D9A
and D0B–D9B should be kept as low as possible
(<15pF) to avoid large digital currents that could feed
back into the analog portion of the MAX1184, thereby
degrading its dynamic performance. Using buffers on
the digital outputs of the ADCs can further isolate the
digital outputs from heavy capacitive loads. To further
improve the dynamic performance of the MAX1184,
small-series resistors (e.g., 100
) may be added to the
digital output paths close to the MAX1184.
Figure 4 displays the timing relationship between out-
put enable and data output valid as well as power-
down/wake-up and data output valid.
Power-Down (PD) and
Sleep (SLEEP) Modes
The MAX1184 offers two power-save modes—sleep and
full power-down mode. In sleep mode (SLEEP = 1), only
the reference bias circuit is active (both ADCs are dis-
abled), and current consumption is reduced to 2.8mA.
To enter full power-down mode, pull PD high. With OE
simultaneously low, all outputs are latched at the last
value prior to the power down. Pulling OE high forces
the digital outputs into a high-impedance state.
Applications Information
Figure 5 depicts a typical application circuit containing
two single-ended to differential converters. The internal
reference provides a VDD/2 output voltage for level-shift-
ing purposes. The input is buffered and then split to a
voltage follower and inverter. One lowpass filter per ADC
suppresses some of the wideband noise associated with
high-speed op amps follows the amplifiers. The user may
select the RISO and CIN values to optimize the filter per-
formance, to suit a particular application. For the applica-
tion in Figure 5, a RISO of 50
is placed before the
capacitive load to prevent ringing and oscillation. The
22pF CIN capacitor acts as a small bypassing capacitor.
OUTPUT
D9A–D0A
OE
tDISABLE
tENABLE
HIGH-Z
VALID DATA
OUTPUT
D9B–D0B
HIGH-Z
VALID DATA
Figure 4. Output Timing Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1184ECM-T | 制造商:Maxim Integrated Products 功能描述:DUAL 10-BIT, 20MSPS, +3V, LOW-POWER ADC WITH - Tape and Reel |
| MAX1184ECM-TD | 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 |
| MAX11850ETM+ | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| MAX11850ETM+T | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| MAX11850GTM+ | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
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