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参数资料
| 型号： | LTC1402CGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 2.2MSPS SHDN 16SSOP |
| 标准包装： | 2,500 |
| 位数： | 12 |
| 采样率（每秒）： | 2.2M |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 150mW |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，单极；2 个单端，双极；1 个差分，单极；1 个差分，双极 |
1
LTC1402
Serial 12-Bit, 2.2Msps
Sampling ADC with Shutdown
s
Sample Rate: 2.2Msps
s
72dB S/(N + D) and –89dB THD at Nyquist
s
Power Dissipation: 90mW (Typ)
s
80MHz Full Power Bandwidth Sampling
s
No Missing Codes over Temperature
s
Available in 16-Pin Narrow SSOP Package
s
Single Supply 5V or
±5V Operation
s
Nap Mode with Instant Wake-Up: 15mW
s
Sleep Mode: 10
W
s
True Differential Inputs Reject Common Mode Noise
s
Input Range (1mV/LSB): 0V to 4.096V or
±2.048V
s
Internal Reference Can Be Overdriven Externally
s
3-Wire Interface to DSPs and Processors (SPI and
MICROWIRE
TM Compatible)
The LTC
1402 is a 12-bit, 2.2Msps sampling A/D con-
verter. This high performance device includes a high dy-
namic range sample-and-hold and a precision reference.
It operates from a single 5V supply or dual
±5V supplies
and draws only 90mW from 5V.
The versatile differential input offers a unipolar range of
4.096V and a bipolar range of
±2.048V for dual supply
systems where high performance op amps perform best,
eliminating the need for special translation circuitry.
The high common mode rejection allows users to elimi-
nate ground loops and common mode noise by measuring
signals differentially from the source.
Outstanding AC performance includes 72dB S/(N + D) and
–93dB SFDR at the Nyquist input frequency of 1.1MHz
with dual
±5V supplies and –84dB SFDR with a single 5V
supply.
The LTC1402 has two power saving modes: Nap and
Sleep. Nap mode consumes only 15mW of power and can
wake up and convert immediately. In Sleep mode, it
typically consumes 10
W of power. Upon power-up from
Sleep mode, a reference ready (REFRDY) signal is avail-
able in the serial data word to indicate that the reference
has settled and the chip is ready to convert.
The 3-wire serial port allows compact and efficient data
transfer to a wide range of microprocessors, microcon-
trollers and DSPs. A digital output driver power supply pin
allows direct connection to 3V or lower logic.
SAMPLE-
AND-HOLD
DOUT
BIP/UNI
CONV
SCK
OVDD
10
8
16
15
DVDD
AVDD
112
11
GAIN
7
5
4
3
–5V OR 0V
10
F
10
F
VREF
4.096V
10
F
64k
OUTPUT
BUFFER
1402 TA01
2.048
REFERENCE
TIMING
LOGIC
AIN
+
LTC1402
OGND
9
6
2
DGND
AIN
–
5V
3V OR 5V
AGND1
14
13
AGND2
+
–
64k
12-BIT ADC
VSS
MICROWIRE is a trademark of National Semiconductor Corp.
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
Telecommunications
s
High Speed Data and Signal Acquisition
s
Digitally Multiplexed Data Acquisition Systems
s
Digital Radio Receivers
s
Spectrum Analysis
s
Low Power and Battery-Operated Systems
s
Handheld or Portable Instruments
s
Imaging Systems
5 Harmonic THD, 2nd, 3rd and SFDR
vs Input Frequency (Unipolar)
INPUT FREQUENCY (Hz)
104
105
106
107
–80
THD,
SFDR,
2ND
3RD
(dB)
–60
–40
1401 G05
–100
–120
0
–20
–90
–70
–50
–110
–10
–30
THD
SFDR
2ND
3RD
fSAMPLE = 2.22MHz
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
BLOCK DIAGRA
W
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