参数资料
型号: LTC1657LIN#PBF
厂商: Linear Technology
文件页数: 14/16页
文件大小: 0K
描述: IC DAC 16BIT R-R MICROPWR 28DIP
标准包装: 47
设置时间: 20µs
位数: 16
数据接口: 并联
转换器数目: 1
电压电源: 单电源
功率耗散(最大): 3.25mW
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 28-DIP(0.300",7.62mm)
供应商设备封装: 28-PDIP
包装: 管件
输出数目和类型: 1 电压,单极;1 电压,双极
采样率(每秒): *
7
LTC1657/LTC1657L
WR (Pin 1): Write Input (Active Low). Used with CSMSB
and/or CSLSB to control the input registers. While WR and
CSMSB and/or CSLSB are held low, data writes into the
input register.
CSLSB (Pin 2): Chip Select Least Significant Byte (Active
Low). Used with WR to control the LSB 8-bit input regis-
ters. While WR and CSLSB are held low, the LSB byte
writes into the LSB input register. Can be connected to
CSMSB for simultaneous loading of both sets of input
latches on a 16-bit bus.
CSMSB (Pin 3): Chip Select Most Significant Byte (Active
Low). Used with WR to control the MSB 8-bit input
registers. While WR and CSMSB are held low, the MSB
byte writes into the MSB input register. Can be connected
to CSLSB for simultaneous loading of both sets of input
latches on a 16-bit bus.
D0 to D7 (Pins 4 to 11): Input data for the Least Significant
Byte. Written into LSB input register when WR = 0 and
CSLSB = 0.
D8 to D15 (Pins 12 to 19): Input data for the Most Signifi-
cant Byte. Written into MSB input register when WR = 0
and CSMSB = 0.
GND (Pin 20): Ground.
REFLO (Pin 21): Lower input terminal of the DAC’s inter-
nal resistor ladder. Typically connected to Analog Ground.
An input code of (0000)H will connect the positive input of
the output buffer to this end of the ladder. Can be used to
offset the zero scale above ground.
REFHI (Pin 22): Upper input terminal of the DAC’s internal
resistor ladder. Typically connected to REFOUT. An input
code of (FFFF)H will connect the positive input of the
output buffer to 1LSB below this voltage.
REFOUT (Pin 23): Output of the internal reference is
2.048V (LTC1657), 1.25V (LTC1657L). Typically con-
nected to REFHI to drive internal DAC resistor ladder.
VCC (Pin 24): Positive Power Supply Input. 4.5V ≤ VCC
5.5V (LTC1657), 2.7V
≤ VCC ≤ 5.5V (LTC1657L). Requires
a 0.1
F bypass capacitor to ground.
VOUT (Pin 25): Buffered DAC Output.
X1/X2 (Pin 26): Gain Setting Resistor Pin. Connect to GND
for G = 2 or to VOUT for G = 1. This pin should always be
tied to a low impedance source, such as ground or VOUT,
to ensure stability of the output buffer when driving
capacitive loads.
UU
U
PI FU CTIO S
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC1657 0.1Hz to 10Hz
Voltage Noise
TIME (SEC)
0
1
V/DIV
8
1659 G19
246
10
7
135
9
TIME (SEC)
0
1
V/DIV
8
1659 G20
246
10
7
135
9
LTC1657L 0.1Hz to 10Hz
Voltage Noise
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