FEATURES

n

LTC2344-16

Quad, 16-Bit, 400ksps/ch

Differential SoftSpan ADC with

Wide Input Common Mode Range

DESCRIPTION

The

LTC

®

2344-16

is a 16-bit, low noise 4-channel simulta-

neous sampling successive approximation register (SAR)

ADC with differential, wide common mode range inputs.

Operating from a 5V supply and using the internal reference

and buffer, each channel of this SoftSpan

TM

ADC can be

independently configured on a conversion-by-conversion

basis to accept ±4.096V, 0V to 4.096V, ±2.048V, or 0V to

2.048V signals. Individual channels may also be disabled

to increase throughput on the remaining channels.

The wide input common mode range and 102dB CMRR of

the LTC2344-16 analog inputs allow the ADC to directly

digitize a variety of signals, simplifying signal chain design.

This input signal flexibility, combined with ±1.25LSB INL,

no missing codes at 16 bits, and 93.4dB SNR, makes the

LTC2344-16 an ideal choice for many applications requir-

ing wide dynamic range.

The LTC2344-16 supports pin-selectable SPI CMOS (1.8V

to 5V) and LVDS serial interfaces. Between one and four

lanes of data output may be employed in CMOS mode,

allowing the user to optimize bus width and throughput.

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents, including 7705765, 7961132, 8319673, 9197235.

n

400ksps per Channel Throughput

Four Simultaneous Sampling Channels

±1.25LSB INL (Maximum)

Guaranteed 16-Bit, No Missing Codes

Differential, Wide Common Mode Range Inputs

Per-Channel SoftSpan Input Ranges:

±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V

±5V, 0V to 5V, ±2.5V, 0V to 2.5V

93.4dB Single-Conversion SNR (Typical)

−114dB THD (Typical) at f

IN

= 2kHz

102dB CMRR (Typical) at f

IN

= 200Hz

Rail-to-Rail Input Overdrive Tolerance

Guaranteed Operation to 125°C

Integrated Reference and Buffer (4.096V)

SPI CMOS (1.8V to 5V) and LVDS Serial I/O

Internal Conversion Clock, No Cycle Latency

81mW Power Dissipation (Typical)

32-Lead (5mm

×

5mm) QFN Package

APPLICATIONS

n

Programmable Logic Controllers

Industrial Process Control

Medical Imaging

High Speed Data Acquisition

TYPICAL APPLICATION

5V

0.1µF

2.2µF

1.8V TO 5V

0.1µF

Integral Nonlinearity

vs Output Code and Channel

1.00

0.75

0.50

INL ERROR (LSB)

0.25

0

–0.25

–0.50

SAMPLE

CLOCK

–0.75

–1.00

–32768

–16384

0

16384

OUTPUT CODE

32768

234416 TA01b

CMOS OR LVDS

I/O INTERFACE

5V

ARBITRARY

FULLY

DIFFERENTIAL

5V

IN0+

S/H

IN0–

V

DD

V

DDLBYP

OV

DD

LVDS/CMOS

PD

±4.096V RANGE

FULLY DIFFERENTIAL DRIVE (IN

–

= –IN

+

)

ALL CHANNELS

LTC2344-16

SDO0

• • •

MUX

16-BIT

SAR ADC

SDO3

SCKO

SCKI

SDI

CS

BUSY

CNV

GND

234416 TA01a

0V

BIPOLAR

0V

• • •

UNIPOLAR

S/H

5V

S/H

0V

DIFFERENTIAL INPUTS

IN+/IN–

WITH

WIDE INPUT COMMON MODE RANGE

IN3+

S/H

IN3–

FOUR SIMULTANEOUS

SAMPLING CHANNELS

REFBUF

47µF

REFIN

0.1µF

Rev A

Document Feedback

For more information

www.analog.com

1

LTC2344-16

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 2)

PIN CONFIGURATION

TOP VIEW

SDO

–

/SDI

24 SDO

+

/SDO3

23 SCKO

–

/SDO2

22 SCKO

+

/SCKO

33

GND

21 OV

DD

20 GND

19 SCKI

–

/SCKI

18 SCKI

+

/SDO1

17 SDI

–

/SDO0

9 10 11 12 13 14 15 16

REFIN

PD

LVDS/CMOS

GND

REFBUF

CNV

SDI

+

Supply Voltage (V

DD

) ..................................................6V

Supply Voltage (OV

DD

) ................................................6V

Internal Regulated Supply Bypass (V

DDLBYP

) ... (Note 3)

Analog Input Voltage

IN0

+

to IN3

+

,

IN0

–

to IN3

–

(Note 4) .................. –0.3V to (V

DD

+ 0.3V)

REFIN.................................................... –0.3V to 2.8V

REFBUF, CNV (Note 4) ............. –0.3V to (V

DD

+ 0.3V)

Digital Input Voltage (Note 4)..... –0.3V to (OV

DD

+ 0.3V)

Digital Output Voltage (Note 4) .. –0.3V to (OV

DD

+ 0.3V)

Power Dissipation .............................................. 500mW

Operating Temperature Range

LTC2344C ................................................ 0°C to 70°C

LTC2344I .............................................–40°C to 85°C

LTC2344H .......................................... –40°C to 125°C

LTC2344MP ....................................... –55°C to 125°C

Storage Temperature Range .................. –65°C to 150°C

V

DDLBYP

32 31 30 29 28 27 26 25

IN3

–

1

IN3

+

2

IN2

–

3

IN2

+

4

IN1

–

IN1

+

5

6

IN0

–

7

IN0

+

8

UH PACKAGE

32-LEAD (5mm

×

5mm) PLASTIC QFN

T

JMAX

= 150°C,

θ

JA

= 44°C/W

EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

LTC2344CUH-16#PBF

LTC2344IUH-16#PBF

LTC2344HUH-16#PBF

LTC2344MPUH-16#PBF

TAPE AND REEL

LTC2344CUH-16#TRPBF

LTC2344IUH-16#TRPBF

LTC2344HUH-16#TRPBF

LTC2344MPUH-16#TRPBF

PART MARKING*

234416

PACKAGE DESCRIPTION

32-Lead (5mm × 5mm) Plastic QFN

TEMPERATURE RANGE

0°C to 70°C

–40°C to 85°C

–40°C to 125°C

–55°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

For more information on lead free part marking, go to:

http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to:

http://www.linear.com/tapeandreel/.

Some packages are available in 500 unit reels through

designated sales channels with #TRMPBF suffix.

BUSY

GND

V

DD

CS

Rev A

2

For more information

www.analog.com

LTC2344-16

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C. (Note 5)

SYMBOL

V

IN

+

V

IN

–

PARAMETER

Absolute Input Range

(IN0

+

to IN3

+

)

Absolute Input Range

(IN0

–

to IN3

–

)

CONDITIONS

(Note 6)

SoftSpan 7: ±V

REFBUF

Range (Note 6)

SoftSpan 6: ±V

REFBUF

/1.024 Range (Note 6)

SoftSpan 5: 0V to V

REFBUF

Range (Note 6)

SoftSpan 4: 0V to V

REFBUF

/1.024 Range (Note 6)

SoftSpan 3: ±0.5 • V

REFBUF

Range (Note 6)

SoftSpan 2: ±0.5 • V

REFBUF

/1.024 Range (Note 6)

SoftSpan 1: 0V to 0.5 • V

REFBUF

Range (Note 6)

l

ELECTRICAL CHARACTERISTICS

MIN

0

– V

REFBUF

– V

REFBUF

/1.024

0

–0.5 • V

REFBUF

–0.5 • V

REFBUF

/1.024

0

−V

DD

–1

TYP

MAX

V

DD

V

DD

V

REFBUF

V

REFBUF

/1.024

V

REFBUF

V

REFBUF

/1.024

0.5 • V

REFBUF

0.5 • V

REFBUF

/1.024

0.5 • V

REFBUF

V

DD

V

DD

1

UNITS

V

µA

pF

dB

V

IN

+ – V

IN

– Input Differential Voltage

Range

V

CM

Input Common Mode Voltage (Note 6)

Range

(Note 7)

V

IN

+ – V

IN

– Input Differential Overdrive

Tolerance

I

IN

C

IN

CMRR

V

IHCNV

V

ILCNV

I

INCNV

Analog Input Leakage Current

Analog Input Capacitance

Input Common Mode

Rejection Ratio

CNV High Level Input Voltage

CNV Low Level Input Voltage

CNV Input Current

Sample Mode

Hold Mode

V

IN

+ = V

IN

− = 3.6V

P-P

200Hz Sine

l

90

10

87

1.3

0.5

–10

10

102

V

μA

V

IN

= 0V to V

DD

l

temperature range, otherwise specifications are at T

A

= 25°C. (Note 8)

SYMBOL

PARAMETER

Resolution

No Missing Codes

Transition Noise

CONDITIONS

CONVERTER CHARACTERISTICS

The

l

denotes the specifications which apply over the full operating

MIN

l

TYP

MAX

UNITS

Bits

16

0.39

0.76

1.6

SoftSpans 7 and 6: ±4.096V and ±4V Ranges

SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges

SoftSpans 3 and 2: ±2.048V and ±2V Ranges

SoftSpan 1: 0V to 2.048V Range

(Note 9)

(Note 11)

V

REFBUF

= 4.096V (REFBUF Overdriven) (Note 11)

l

LSB

RMS

LSB

RMS

LSB

RMS

LSB

RMS

1.25

0.9

500

0.13

LSB

μV

μV/°C

%FS

ppm/°C

INL

DNL

ZSE

FSE

Integral Linearity Error

Zero-Scale Error

Zero-Scale Error Drift

Full-Scale Error

Full-Scale Error Drift

–1.25

−0.9

−500

−0.13

±0.30

±0.20

±65

±2

±0.025

±2.5

Differential Linearity Error (Note 10)

l

Rev A

For more information

www.analog.com

3

LTC2344-16

DYNAMIC ACCURACY

SYMBOL PARAMETER

SINAD

Signal-to-(Noise +

Distortion) Ratio

The

l

denotes the specifications which apply over the full operating temperature range,

otherwise specifications are at T

A

= 25°C. A

IN

= –1dBFS. (Notes 8, 12)

CONDITIONS

SoftSpans 7 and 6: ±4.096V and ±4V Ranges, f

IN

= 2kHz

SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges, f

IN

= 2kHz

SoftSpans 3 and 2: ±2.048V and ±2V Ranges, f

IN

= 2kHz

SoftSpan 1: 0V to 2.048V Range, f

IN

= 2kHz

SoftSpans 7 and 6: ±4.096V and ±4V Ranges, f

IN

= 2kHz

SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges, f

IN

= 2kHz

SoftSpans 3 and 2: ±2.048V and ±2V Ranges, f

IN

= 2kHz

SoftSpan 1: 0V to 2.048V Range, f

IN

= 2kHz

SoftSpans 7 and 6: ±4.096V and ±4V Ranges, f

IN

= 2kHz

SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges, f

IN

= 2kHz

SoftSpans 3 and 2: ±2.048V and ±2V Ranges, f

IN

= 2kHz

SoftSpan 1: 0V to 2.048V Range, f

IN

= 2kHz

SoftSpans 7 and 6: ±4.096V and ±4V Ranges, f

IN

= 2kHz

SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges, f

IN

= 2kHz

SoftSpans 3 and 2: ±2.048 and ±2V Ranges, f

IN

= 2kHz

SoftSpan 1: 0V to 2.048V Range, f

IN

= 2kHz

One Channel Converting 3.6V

P-P

200Hz Sine in ±2.048V Range,

Crosstalk to All Other Channels

l

MIN

90.4

85.0

79.4

90.6

85.1

85.2

79.5

TYP

93.4

88.7

83.3

93.4

88.7

83.3

–114

–111

–110

–109

MAX

UNITS

dB

SNR

Signal-to-Noise Ratio

THD

Total Harmonic Distortion

–99

–96

–97

dB

MHz

ns

ps

RMS

ns

SFDR

Spurious Free Dynamic

Range

97

96

97

115

112

111

110

−109

22

1

150

3

Channel-to-Channel

Crosstalk

–3dB Input Bandwidth

Aperture Delay

Aperture Delay Matching

Aperture Jitter

Transient Response

Full-Scale Step, 0.005% Settling

210

operating temperature range, otherwise specifications are at T

A

= 25°C. (Note 8)

SYMBOL

V

REFIN

PARAMETER

Internal Reference Output Voltage

Internal Reference Temperature Coefficient

Internal Reference Line Regulation

Internal Reference Output Impedance

V

REFIN

REFIN Voltage Range

REFIN Overdriven (Note 6)

(Note 13)

V

DD

= 4.75V to 5.25V

CONDITIONS

INTERNAL REFERENCE CHARACTERISTICS

The

l

denotes the specifications which apply over the full

MIN

2.043

l

TYP

2.048

5

0.1

20

MAX

2.053

20

UNITS

V

ppm/°C

mV/V

kΩ

1.25

2.2

V

Rev A

4

For more information

www.analog.com

LTC2344-16

The

l

denotes the specifications which apply over the full

operating temperature range, otherwise specifications are at T

A

= 25°C. (Note 8)

SYMBOL

V

REFBUF

PARAMETER

Reference Buffer Output Voltage

REFBUF Voltage Range

REFBUF Input Impedance

I

REFBUF

REFBUF Load Current

CONDITIONS

REFIN Overdriven, V

REFIN

= 2.048V

REFBUF Overdriven (Notes 6, 14)

V

REFIN

= 0V, Buffer Disabled

V

REFBUF

= 5V, 4 Channels Enabled (Notes 14, 15)

V

REFBUF

= 5V, Acquisition Mode (Note 14)

l

REFERENCE BUFFER CHARACTERISTICS

MIN

4.091

2.5

TYP

4.096

13

1.5

0.39

MAX

4.101

5

1.9

UNITS

V

kΩ

mA

The

l

denotes the specifications which apply over the

full operating temperature range, otherwise specifications are at T

A

= 25°C. (Note 8)

SYMBOL

V

IH

V

IL

I

IN

C

IN

V

OH

V

OL

I

OZ

I

SOURCE

I

SINK

V

ID

R

ID

V

ICM

I

ICM

V

OD

V

OCM

I

OZ

PARAMETER

High Level Input Voltage

Low Level Input Voltage

Digital Input Current

Digital Input Capacitance

High Level Output Voltage

Low Level Output Voltage

Hi-Z Output Leakage Current

Output Source Current

Output Sink Current

Differential Input Voltage

On-Chip Input Termination

Resistance

Common-Mode Input Voltage

Common-Mode Input Current

Differential Output Voltage

Common-Mode Output Voltage

Hi-Z Output Leakage Current

V

IN

+ = V

IN

– = 0V to OV

DD

R

L

= 100Ω Differential Termination

R

L

= 100Ω Differential Termination

V

OUT

= 0V to OV

DD

CS

= 0V, V

ICM

= 1.2V

CS

= OV

DD

I

OUT

= –500μA

I

OUT

= 500μA

V

OUT

= 0V to OV

DD

V

OUT

= 0V

V

OUT

= OV

DD

l

OV

DD

– 0.2

l

DIGITAL INPUTS AND DIGITAL OUTPUTS

CONDITIONS

MIN

l

0.8 • OV

DD

l

TYP

MAX

UNITS

V

CMOS Digital Inputs and Outputs

0.2 • OV

DD

–10

5

0.2

–10

–50

50

200

80

0.3

–10

275

1.1

–10

350

1.2

350

106

10

1.2

600

130

2.2

10

425

1.3

10

V

μA

pF

V

μA

mA

mV

Ω

MΩ

V

μA

mV

V

μA

V

IN

= 0V to OV

DD

l

LVDS Digital Inputs and Outputs

Rev A

For more information

www.analog.com

5

参数名称	属性值
厂商名称	ADI(亚德诺半导体)
产品种类	模数转换器 - ADC
系列	LTC2344-16
安装风格	SMD/SMT
封装 / 箱体	QFN-32
分辨率	16 bit
通道数量	4 Channel
采样比	400 kS/s
输入类型	Differential
接口类型	Serial
结构	SAR
参考类型	External, Internal
数字电源电压	5 V
SNR – 信噪比	93.4 dB
最小工作温度	- 55 C
最大工作温度	+ 125 C
转换器数量	4 Converter
产品	Analog to Digital Converters
类型	Precision
关闭	No Shutdown
DNL - 微分非线性	0.9 LSB
INL - 积分非线性	1.25 LSB
Pd-功率耗散	500 mW
参考电压	2.048 V, 2.2 V
SFDR - 无杂散动态范围	115 dB
SINAD - 信噪和失真率	93.4 dB
工厂包装数量	2500
THD - 总谐波失真	- 114 dB

	LTC2344MPUH-16#TRPBF	LTC2344IUH-16#PBF	LTC2344MPUH-16#PBF	LTC2344CUH-16#PBF	LTC2344HUH-16#PBF
描述	模数转换器 - ADC Quad, 16-Bit, 400ksps Differential Â±5V Input SoftSpan ADC with Wide Input Common Mode Range	模数转换器 - ADC Quad, 16-Bit, 400ksps Differential Â±5V Input SoftSpan ADC with Wide Input Common Mode Range	模数转换器 - ADC Quad, 16-Bit, 400ksps Differential Â±5V Input SoftSpan ADC with Wide Input Common Mode Range	模数转换器 - ADC Quad, 16-Bit, 400ksps Differential Â±5V Input SoftSpan ADC with Wide Input Common Mode Range	模数转换器 - ADC Quad, 16-Bit, 400ksps Differential Â±5V Input SoftSpan ADC with Wide Input Common Mode Range
厂商名称	ADI(亚德诺半导体)	ADI(亚德诺半导体)	ADI(亚德诺半导体)	ADI(亚德诺半导体)	ADI(亚德诺半导体)
Brand Name	-	Analog Devices Inc	-	Analog Devices Inc	Analog Devices Inc
是否无铅	-	含铅	-	含铅	含铅
是否Rohs认证	-	符合	-	符合	符合
包装说明	-	HVQCCN,	-	HVQCCN,	HVQCCN,
针数	-	32	-	32	32
制造商包装代码	-	05-08-1693	-	05-08-1693	05-08-1693
Reach Compliance Code	-	compliant	-	compliant	compliant
最大模拟输入电压	-	4.101 V	-	4.101 V	4.101 V
最小模拟输入电压	-	-4.091 V	-	-4.091 V	-4.091 V
最长转换时间	-	2.08 µs	-	2.08 µs	2.08 µs
转换器类型	-	ADC, SUCCESSIVE APPROXIMATION	-	ADC, SUCCESSIVE APPROXIMATION	ADC, SUCCESSIVE APPROXIMATION
JESD-30 代码	-	S-PQCC-N32	-	S-PQCC-N32	S-PQCC-N32
JESD-609代码	-	e3	-	e3	e3
长度	-	5 mm	-	5 mm	5 mm
最大线性误差 (EL)	-	0.0019%	-	0.0019%	0.0019%
模拟输入通道数量	-	4	-	4	4
位数	-	16	-	16	16
功能数量	-	1	-	1	1
端子数量	-	32	-	32	32
最高工作温度	-	85 °C	-	70 °C	125 °C
输出位码	-	BINARY, 2\'S COMPLEMENT BINARY	-	BINARY, 2\'S COMPLEMENT BINARY	BINARY, 2\'S COMPLEMENT BINARY
输出格式	-	SERIAL	-	SERIAL	SERIAL
封装主体材料	-	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	-	HVQCCN	-	HVQCCN	HVQCCN
封装形状	-	SQUARE	-	SQUARE	SQUARE
封装形式	-	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	-	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）	-	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED
采样速率	-	0.4 MHz	-	0.4 MHz	0.4 MHz
采样并保持/跟踪并保持	-	SAMPLE	-	SAMPLE	SAMPLE
座面最大高度	-	0.8 mm	-	0.8 mm	0.8 mm
标称供电电压	-	5 V	-	5 V	5 V
表面贴装	-	YES	-	YES	YES
技术	-	CMOS	-	CMOS	CMOS
温度等级	-	INDUSTRIAL	-	COMMERCIAL	AUTOMOTIVE
端子面层	-	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)
端子形式	-	NO LEAD	-	NO LEAD	NO LEAD
端子节距	-	0.5 mm	-	0.5 mm	0.5 mm
端子位置	-	QUAD	-	QUAD	QUAD
处于峰值回流温度下的最长时间	-	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED
宽度	-	5 mm	-	5 mm	5 mm

LTC2344MPUH-16#TRPBF

LTC2344MPUH-16#TRPBF概述

LTC2344MPUH-16#TRPBF规格参数

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