MAXIM DS1870 User Manual

Rev 1; 5/04

________________________________

DS1870

是一款面向AB类

出的双通道偏置控制器。

LDMOS
DS1870

射频功率放大器应用推

根据放大器的温度、漏

概述

极电压或漏极电流(或其它的外部监控信号)，通过查找表

控制电位器的

(LUT)

感器和多路

A/D

转换器

256

(ADC)

个位置。

DS1870

内部具有温度传

，提供高效、低成本的解决
方案，使用非线性补偿技术改善功放效率，这是传统的
偏置解决方案无法提供的。

________________________________

应用

蜂窝基站

医疗设备

工业控制

光收发器

LDMOS RF

功放偏置

控制器

________________________________

用于射频偏置控制的可编程双通道解决方案

♦

电位器位置可自动更新，以补偿环境温度和漏极

♦

电压或漏极电流
五路、13位

♦

和

I

D2

每路

♦
♦

♦ I

♦
♦

ADC的Hi/Lo

非易失存储器用于器件设置、查找表和

字节的用户存储器

32

TM

2

兼容串行接口，同一串行总线上可挂接多达

C

个器件

8

单电源5V供电
小尺寸16引脚

♦ -40°C至+95°C

连续监控环境温度、

ADC

报警可触发故障输出信号

TSSOP

封装

工作温度范围

、

V

V

CC

D

特性

、

I

DS1870

D1

____________________________

I2C是Philips Corp.

或其从属授权公司的

Inc.

许可、将这些产品用于符合

的一个商标。购买

产品，即得到了

I2C

定义的

Philips

Maxim Integrated Products,

Philips I2C

标准规范的系统。

I2C

的专利

PART TEMP RANGE PIN-PACKAGE

DS1870E-010 -40°C to +95°C

典型工作电路见本数据资料的最后部分。

16 TSSOP
(173 mil)

___________________________________________________________________

TOP VIEW

1

1

2

W

1

W

3

2

L

4

2

I

5

D1

I

6

D2

V

7

D

GND FAULT

89

DS1870

H

V

COM

SDA

SCL

16L

CC

15

14

13

A

12

2

A

11

1

A

10

0

定购信息

引脚配置

______________________________________________ Maxim Integrated Products 1

本文是

正式英文资料的译文，

Maxim

不对翻译中存在的差异或由此产生的错误负责。请注意译文中可能存在文字组织或

Maxim

翻译错误，如需确认任何词语的准确性，请参考

索取免费样品和最新版的数据资料，请访问

Maxim

Maxim

TSSOP (173 mil)

提供的英文版资料。

的主页：

www.maxim-ic.com.cn

。

LDMOS RF

PARAMETER

CONDITIONS

Supply Voltage V

CC

(Note 1) 4.5 5.5 V

Input Logic 1
(SDA, SCL, A

2

, A1, A0)

V

IH

0.7 x

V

CC

+

0.3

V

Input Logic 0
(SDA, SCL, A

2

, A1, A0)

V

IL

+0.3 x

V

H

COM

Voltage 4.5 5.5 V

LX and WX Voltage

V

Wiper Current -1 +1 mA

PARAMETER

CONDITIONS

Supply Current I

CC

(Note 2) 1 2 mA

Input Leakage I

LI

nA

V

OL1

3mA sink current 0.4 V

Low-Level Output Voltage
(SDA, FAULT)

V

OL2

6mA sink current 0.6 V

I/O Capacitance C

I/O

10 pF

Digital Power-On Reset V

POD

1.0 2.2 V

Analog Power-On Reset V

POA

2.0 2.8 V

功放偏置

控制器

ABSOLUTE MAXIMUM RATINGS

Voltage Range on VCC, H

Ground ...............................................................-0.5V to +6.0V

Voltage Range on A

Ground. ...................-0.5V to V

Voltage Range on L0, L1, W0, and W1 Relative to

Ground .................-0.5V to H

, A1, A2, FAULT, VD, ID1, ID2Relative to

0

, SDA, and SCL Pins Relative to

COM

+ 0.5V, not to exceed +6.0V

CC

+ 0.5V, not to exceed +6.0V

COM

Operating Temperature Range ...........................-40°C to +95°C

EEPROM Programming Temperature Range .........0°C to +70°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature .......................................See IPC/JEDEC

J-STD-020A Specification

DS1870

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED DC OPERATING CONDITIONS

(TA= -40°C to +95°C)

SYMBOL

DC ELECTRICAL CHARACTERISTICS

(VCC= +4.5 to 5.5V, TA= -40°C to +95°C.)

SYMBOL

MIN TYP MAX UNITS

V

CC

-0.3

-0.3

MIN TYP MAX UNITS

-200 +200

V

H

COM

+ 0.3

CC

2 _____________________________________________________________________

LDMOS RF

PARAMETER

CONDITIONS

UNITS

VD Monitor Factory­Calibrated FS

Code FFF8h

V

VCC Monitor Factory­Calibrated FS

Code FFF8h

V

ID1 and ID2 Monitor Factory­Calibrated FS

Code FFF8h

V

Resolution
(V

CC

, VD, ID1, ID2)

%FS

Accuracy
(V

CC

, VD, ID1, ID2)

0.5

%FS

Update Rate for
V

CC

, VD, ID1, I

D2

t

frame

50 ms

PARAMETER

CONDITIONS

UNITS

Thermometer Error T

ERR

-40°C to 95°C -3 +3 °C

Update Rate t

frame

50 ms

PARAMETER

CONDITIONS

UNITS

Wiper Resistance +25°C

Ω

Potentiometer
End-to-End Resistance

R

POT

+25°C

13

kΩ

Resolution 0.4

%FS

Absolute Linearity (Note 3) -1 +1 LSB

Relative Linearity (Note 4)

LSB

Ratiometric Temperature
Coefficient

5

ppm/°C

End-to-End Temperature
Coefficient

70

ppm/°C

-3dB Cutoff Frequency (Note 5) 1

MHz

Series Resistors from L1, L2 to
GND

R

S

+25°C

kΩ

V

HCOM/VLX

0.6

功放偏置

控制器

ANALOG VOLTAGE-MONITORING CHARACTERISTICS

(VCC= +4.5 to 5.5V, TA = -40°C to +95°C.)

SYMBOL

DIGITAL THERMOMETER CHARACTERISTICS

(VCC= +4.5 to 5.5V, TA= -40°C to +95°C.)

SYMBOL

DS1870

MIN TYP MAX

2.488 2.500 2.513

6.521 6.553 6.587

0.4975 0.5000 0.5025

0.0122

0.25

MIN TYP MAX

ANALOG POTENTIOMETER CHARACTERISTICS

(VCC= +4.5 to 5.5V, TA= -40°C to +95°C.)

SYMBOL

_____________________________________________________________________ 3

MIN TYP MAX

500 1000

10.0

-0.5 +0.5

15.1 19.5 25.2

0.5975

16.8

0.6025

LDMOS RF

PARAMETER

CONDITIONS

UNITS

POT1 and POT2 Temp LUT Size

72

Bytes

each

POT1 and POT2 Temp LUT Index
Range

-40

°C

Temp Step 2°C

Temp Hysteresis (Note 6) 1 °C

POT1 and POT2 Drain LUT Size 64

Bytes

each

POT1 and POT2 Drain LUT V

D

Index Range

Hex

POT1 and POT2 Drain LUT V

D

Step

Hex

POT1 and POT2 Drain LUT V

D

Hysteresis

(Note 6)

Hex

POT1 and POT2 Drain LUT I

DX

Index Range

Hex

POT1 and POT2 Drain LUT I

DX

Step

Hex

POT1 and POT2 Drain LUT I

DX

Hysteresis

(Note 6)

Hex

功放偏置

控制器

LOOKUP TABLE CHARACTERISTICS

(VCC= +4.5 to 5.5V, TA= -40°C to +95°C.)

DS1870

SYMBOL

MIN TYP MAX

+102

8000 FE00

0200

0100

0000 7E00

0200

0100

4 _____________________________________________________________________

LDMOS RF

PARAMETER

CONDITIONS

UNITS

SCL Clock Frequency f

SCL

(Note 7) 0 400 kHz
Bus Free Time Between Stop and
Start Conditions

t

BUF

1.3 µs

Hold Time (Repeated) Start
Condition

0.6 µs

Low Period of SCL t

LOW

1.3 µs

High Period of SCL t

HIGH

0.6 µs

Data Hold Time

0 0.9 µs

Data Setup Time

100 ns

Start Setup Time t

SU:STA

0.6 µs

SDA and SCL Rise Time t

R

(Note 8)

20 +

300 ns

SDA and SCL Fall Time t

F

(Note 8)

20 +

300 ns

Stop Setup Time

0.6 µs
SDA and SCL Capacitive
Loading

C

B

(Note 8) 400 pF

EEPROM Write Time t

W

(Note 9) 10 20 ms

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Writes +70°C (Note 5)

功放偏置

控制器

AC ELECTRICAL CHARACTERISTICS

(VCC= +4.5V to 5.5V, TA= -40°C to +95°C, timing referenced to V

SYMBOL

t

HD:STA

t

HD:DAT

t

SU:DAT

t

SU:STO

IL(MAX)

NONVOLATILE MEMORY CHARACTERISTICS

(VCC= +4.5V to 5.5V, TA= 0°C to +70°C.)

and V

IH(MIN)

.) (Figure 3)

MIN TYP MAX

0.1C

B

0.1C

B

DS1870

Note 1: All voltages referenced to ground.
Note 2: Supply current is measured with all logic inputs at their inactive state (SDA = SCL = V

Note 3: Absolute linearity is the difference of measured value from expected value at the DAC position. Expected value is a

Note 4: Relative linearity is the deviation of an LSB DAC setting change vs. the expected LSB change. Expected LSB change is

Note 5: This parameter is guaranteed by design.
Note 6: See Figure 1.
Note 7: I

Note 8: C
Note 9: EEPROM write begins after a stop condition occurs.

levels. All outputs are disconnected.

straight line from measured minimum position to measured maximum position.

the slope of the straight line from measured minimum position to measured maximum position.

2

C interface timing shown is for fast-mode (400kHz) operation. This device is also backward compatible with I2C stan-

dard-mode timing.

—total capacitance of one bus line in picofarads.

B

_____________________________________________________________________ 5

50,000

) and driven to well-defined logic

CC

LDMOS RF

POTENTIOMETER 1 AND 2 OUTPUT VOLTAGE

vs. POSITON

DS1870 toc04

WIPER POSITION (DEC)

WIPER VOLTAGE (V)

19212864

1

2

3

4

5

6

0

0 256

H

COM

= 5V
L1 AND L2
NOT CONNECTED

POTENTIOMETER 1 DIFFERENTIAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc05

WIPER POSITION (DEC)

DIFFERENTIAL NONLINEARITY (LSB)

19212864

-0.20

-0.15

-0.10

-0.05

0

0.05

0.10

0.15

0.20

0.25

-0.25
0 256

POTENTIOMETER 2 DIFFERENTIAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc06

WIPER POSITION (DEC)

DIFFERENTIAL NONLINEARITY (LSB)

19212864

-0.20

-0.15

-0.10

-0.05

0

0.05

0.10

0.15

0.20

0.25

-0.25
0256

POTENTIOMETER 1 INTEGRAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc07

WIPER POSITION (DEC)

INTEGRAL NONLINEARITY (LSB)

19212864

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5
0 256

POTENTIOMETER 2 INTEGRAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc08

WIPER POSITION (DEC)

INTEGRAL NONLINEARITY (LSB)

19212864

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5
0 256

POTENTIOMETER 1 AND 2

WIPER RESISTANCE vs. WIPER VOLTAGE

DS1870 toc09

WIPER VOLTAGE (V)

WIPER RESISTANCE (Ω)

4321

100

200

300

400

500

600

700

800

900

1000

0

05

H

COM

= 5.0V

SUPPLY CURRENT vs. SUPPLY VOLTAGE

DS1870 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

5.35.14.94.7

620

640

660

680

700

720

740

760

780

800

600

4.5 5.5

SUPPLY CURRENT vs. TEMPERATURE

DS1870 toc02

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

806020 400-20

450

500

550

600

650

700

750

800

850

900

400

-40 100

VCC = 5.5V

VCC = 4.5V

VCC = 5.0V

H

COM

CURRENT vs. H

COM

VOLTAGE

DS1870 toc03

H

COM

VOLTAGE (V)

H

COM

CURRENT (mA)

5.35.14.94.7

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.50

0

4.5 5.5

控制器

功放偏置

_______________________________________________________________

(VCC= +5.0V, TA = +25°C, unless otherwise noted.)

DS1870

典型工作特性

6 _____________________________________________________________________

LDMOS RF

OUTPUT DRIFT (PPM/C)

-15

-10

-5

0

5

10

15

20

-20

POTENTIOMETER LOW TERMINAL VOLTAGE

vs. TEMPERATURE

DS1870 toc12

TEMPERATURE (°C)

8060-20 0 20 40-40 100

L1

L2

H

COM

= 5.0V

VCC CONVERSION ERROR

vs. SUPPLY VOLTAGE

DS1870 toc13

SUPPLY VOLTAGE (V)

ERROR (% FS)

5.04.54.03.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5

3.0 5.5

DEFAULT V

CC

CALIBRATION

VD CONVERSION ERROR

vs. INPUT VOLTAGE

DS1870 toc14

INPUT VOLTAGE (V)

ERROR (% FS)

2.01.51.00.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5

02.5

DEFAULT VD

CALIBRATION

ID1 CONVERSION ERROR

vs. INPUT VOLTAGE

DS1870 toc15

INPUT VOLTAGE (V)

ERROR (% FS)

0.40.30.20.1

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5

00.5

DEFAULT ID1

CALIBRATION

ID2 CONVERSION ERROR

vs. INPUT VOLTAGE

DS1870 toc16

INPUT VOLTAGE (V)

ERROR (% FS)

0.40.30.20.1

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5

00.5

DEFAULT ID2

CALIBRATION

POTENTIOMETER 1 AND 2

WIPER RESISTANCE vs. WIPER VOLTAGE

DS1870 toc09

WIPER VOLTAGE (V)

WIPER RESISTANCE (Ω)

4321

100

200

300

400

500

600

700

800

900

1000

0

05

H

COM

= 5.0V

POTENTIOMETER 1 AND 2

WIPER RESISTANCE vs. TEMPERATURE

DS1870 toc10

TEMPERATURE (°C)

RESISTANCE CHANGE FROM 25°C (PPM/C)

806020 400-20

100

200

300

400

500

600

700

800

900

1000

0

-40 100

H

COM

= 5V

WIPER VOLTAGE = 4V

POTENTIOMETER END-TO-END RESISTANCE

vs. TEMPERATURE

DS1870 toc11

TEMPERATURE (°C)

CHANGE FROM RESISTANCE AT 25°C (PPM/C)

8060-20 0 20 40

-150

-100

-50

0

50

100

150

200

-200

-40 100

R

POT2

+ R

S2

R

POT1

+ R

S1

___________________________________________________________

(VCC= +5.0V, TA = +25°C, unless otherwise noted.)

功放偏置

控制器

典型工作特性(续

DS1870

)

_____________________________________________________________________ 7

LDMOS RF

控制器

功放偏置

___________________________________________________________________

引脚 名称

1L

2W

DS1870

3W

4L

5I

6I

7V

8 GND

9 FAULT

10 A

11 A

12 A

13 SCL

14 SDA

15 H

16 V

1

1

2

2

D1

D2

D

0

1

2

COM

CC

电位器1低端
电位器1滑动端
电位器2滑动端
电位器2低端
漏极电流1监控输入
漏极电流2监控输入
漏极电压监控输入
地

故障输出。当启用的报警状态之一超出了所设置的门限时，这个集极开路输出被置为高电平。

2

地址输入。这些输入引脚决定了从设备的地址。二进制从设备地址为

I

C

2

串行时钟输入。
串行数据输入/输出。双向
电位器高端。电位器1和2的公共端。

电源输入

时钟输入。

C

I

2

数据引脚。

I

C

功能

1010A2A1A

。

0

引脚说明

8 _____________________________________________________________________

LDMOS RF

功放偏置

控制器

___________________________________________________________________

V

V

SDA

SCL

GND

CC

A

0

A

1

A

2

CC

2

C INTERFACE

I

CONTROL

ADDRESS

GENERATION

V

LOAD

LOAD

I2C DATA BUS

I

D

INDEX

POT1

DRAIN

LUT

TABLE 4

(64 BYTES)

TEMP

INDEX

POT1

TEMP

LUT

TABLE 2

(72 BYTES)

GAIN

13-BIT

ADC

MEASURED

VALUES FOR

TEMP, V

, ID0, I

V

D

LIMIT

COMPARATOR

DS1870

CALIBRATION

REGISTERS

,

CC

D1

LIMIT FLAG
REGISTERS

32 BYTES

USER

MEMORY

D1

VD1

V

D

POT2

DRAIN

LUT

TABLE 5

(64 BYTES)

POT2
TEMP

LUT

TABLE 3

(72 BYTES)

I

INDEX

INDEX

D2

OFFSET

CALIBRATION

REGISTERS

VD2

∑

HI AND LO

LIMITS FOR

TEMP, V

CC

, ID1, I

V

D

+

+

∑

+

∑

+

++

,

D2

TEMP SENSOR

M
U
X

ON-CHIP

FAULT
MASK

R

R

V

CC

POT2
R

POT

S

POT1

S

R

POT

功能框图

V

D

I

D1

I

D2

FAULT

H

COM

W

2

L

2

W

1

L

1

DS1870

_____________________________________________________________________ 9