LTC2290IUP#PBF Linear Technology, LTC2290IUP#PBF Datasheet

IC ADC DUAL 12BIT 10MSPS 64QFN

LTC2290IUP#PBF

Manufacturer Part Number
LTC2290IUP#PBF
Description
IC ADC DUAL 12BIT 10MSPS 64QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC2290IUP#PBF

Number Of Bits
12
Sampling Rate (per Second)
10M
Data Interface
Parallel
Number Of Converters
2
Power Dissipation (max)
138mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
64-WFQFN, Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
ANALOG
ANALOG
INPUT A
INPUT B
CLK A
CLK B
Integrated Dual 12-Bit ADCs
Sample Rate: 10Msps
Single 3V Supply (2.7V to 3.4V)
Low Power: 120mW
71.3dB SNR
90dB SFDR
110dB Channel Isolation
Multiplexed or Separate Data Bus
Flexible Input: 1V
575MHz Full Power Bandwidth S/H
Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
Pin Compatible Family
105Msps: LTC2282 (12-Bit), LTC2284 (14-Bit)
80Msps: LTC2294 (12-Bit), LTC2299 (14-Bit)
65Msps: LTC2293 (12-Bit), LTC2298 (14-Bit)
40Msps: LTC2292 (12-Bit), LTC2297 (14-Bit)
25Msps: LTC2291 (12-Bit), LTC2296 (14-Bit)
10Msps: LTC2290 (12-Bit), LTC2295 (14-Bit)
64-Pin (9mm × 9mm) QFN Package
Wireless and Wired Broadband Communication
Imaging Systems
Spectral Analysis
Portable Instrumentation
CLOCK/DUTY CYCLE
CLOCK/DUTY CYCLE
+
+
INPUT
INPUT
CONTROL
CONTROL
S/H
S/H
U
P-P
to 2V
PIPELINED
PIPELINED
ADC CORE
ADC CORE
12-BIT
12-BIT
P-P
Range
U
DRIVERS
DRIVERS
OUTPUT
OUTPUT
2295 TA01
DESCRIPTIO
The LTC
A/D converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2290 is perfect for
demanding imaging and communications applications
with AC performance that includes 71.3dB SNR and 90dB
SFDR for signals well beyond the Nyquist frequency.
DC specs include ±0.3LSB INL (typ), ±0.15LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.25LSB
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.6V
logic. An optional multiplexer allows both channels to
share a digital output bus.
A single-ended CLK input controls converter operation.
An optional clock duty cycle stabilizer allows high perfor-
mance at full speed for a wide range of clock duty cycles.
OV
D11A
D0A
OGND
MUX
OV
D11B
D0B
OGND
All other trademarks are the property of their respective owners.
• •
• •
DD
DD
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
2290 is a 12-bit 10Msps, low power dual 3V
–1.0
–0.2
–0.4
–0.6
–0.8
1.0
0.8
0.6
0.4
0.2
U
0
Low Power 3V ADC
0
Dual 12-Bit, 10Msps
RMS
Typical INL, 2V Range
1024
.
CODE
2048
3072
LTC2290
2290 TA01
4096
2290fa
1

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LTC2290IUP#PBF Summary of contents

Page 1

... A single-ended CLK input controls converter operation. An optional clock duty cycle stabilizer allows high perfor- mance at full speed for a wide range of clock duty cycles. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical INL, 2V Range 1 ...

Page 2

LTC2290 ABSOLUTE AXI U RATI (Notes Supply Voltage (V ) ................................................. 4V DD Digital Output Ground Voltage (OGND) ....... –0. Analog Input Voltage (Note 3) ..... –0.3V ...

Page 3

ALOG I PUT The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are 25°C. (Note 4) A SYMBOL PARAMETER + V Analog Input Range (A – ...

Page 4

LTC2290 TER AL REFERE CE CHARACTERISTICS PARAMETER V Output Voltage CM V Output Tempco CM V Line Regulation CM V Output Resistance DIGITAL I PUTS A D DIGITAL OUTPUTS full operating temperature range, ...

Page 5

W U POWER REQUIRE E TS range, otherwise specifications are at T SYMBOL PARAMETER V Analog Supply Voltage DD OV Output Supply Voltage DD IV Supply Current DD P Power Dissipation DISS P Shutdown Power (Each Channel) SHDN P Nap ...

Page 6

LTC2290 W U TYPICAL PERFOR A CE CHARACTERISTICS Crosstalk vs Input Frequency –100 –105 –110 –115 –120 –125 –130 100 INPUT FREQUENCY (MHz) 2290 G01 8192 Point FFT 5.1MHz, IN –1dB, 2V Range ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS SNR and SFDR vs Sample Rate, 2V Range 5MHz, –1dB IN 100 SAMPLE RATE (Msps) 2290 G10 I vs ...

Page 8

LTC2290 CTIO (Pin 1): Channel A Positive Differential Analog INA Input. – A (Pin 2): Channel A Negative Differential Analog INA Input. REFHA (Pins 3, 4): Channel A High Reference. Short together ...

Page 9

CTIO S SHDNA (Pin 59): Channel A Shutdown Mode Selection Pin. Connecting SHDNA to GND and OEA to GND results in normal operation with the outputs enabled. Connecting SHDNA to GND and OEA to V ...

Page 10

LTC2290 DIAGRA ANALOG N INPUT t H CLK – 5 D0-D11, OF ANALOG A INPUT A ANALOG B INPUT B t CLKA = CLKB = MUX A – ...

Page 11

U U APPLICATIO S I FOR ATIO DYNAMIC PERFORMANCE Signal-to-Noise Plus Distortion Ratio The signal-to-noise plus distortion ratio [S/(N + D)] is the ratio between the RMS amplitude of the fundamental input frequency and the RMS amplitude of all other ...

Page 12

LTC2290 U U APPLICATIO S I FOR ATIO applications, the analog inputs can be driven single-ended with slightly worse harmonic distortion. The CLK input is single-ended. The LTC2290 has two phases of operation, determined by the state of the CLK ...

Page 13

U U APPLICATIO S I FOR ATIO high to low, the inputs are reconnected to the sampling capacitors to acquire a new sample. Since the sampling capacitors still hold the previous sample, a charging glitch proportional to the change in ...

Page 14

LTC2290 U U APPLICATIO S I FOR ATIO Figure 4 demonstrates the use of a differential amplifier to convert a single ended input signal into a differential input signal. The advantage of this method is that it provides low frequency ...

Page 15

U U APPLICATIO S I FOR ATIO The difference amplifier generates the high and low refer- ence for the ADC. High speed switching circuits are connected to these outputs and they must be externally bypassed. Each output has two pins. ...

Page 16

LTC2290 U U APPLICATIO S I FOR ATIO Maximum and Minimum Conversion Rates The maximum conversion rate for the LTC2290 is 10Msps. For the ADC to operate properly, the CLK signal should have a 50% (±10%) duty cycle. Each half ...

Page 17

U U APPLICATIO S I FOR ATIO Data Format Using the MODE pin, the LTC2290 parallel digital output can be selected for offset binary or 2’s complement format. Note that MODE controls both Channel A and Channel B. Connecting MODE ...

Page 18

LTC2290 U U APPLICATIO S I FOR ATIO Digital Output Multiplexer The digital outputs of the LTC2290 can be multiplexed onto a single data bus. The MUX pin is a digital input that swaps the two data busses. If MUX ...

Page 19

U U APPLICATIO S I FOR ATIO W U LTC2290 2290fa 19 ...

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LTC2290 U U APPLICATIO S I FOR ATIO Silkscreen Top Top Side 2290fa ...

Page 21

U U APPLICATIO S I FOR ATIO W U Inner Layer 2 GND Inner Layer 3 Power LTC2290 2290fa 21 ...

Page 22

LTC2290 U U APPLICATIO S I FOR ATIO Bottom Side 2290fa ...

Page 23

... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 6. DRAWING NOT TO SCALE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 64-Lead Plastic QFN (9mm × ...

Page 24

... SNR, 9mm × 9mm QFN Package 150mW, 74.5dB SNR, 9mm × 9mm QFN Package 235mW, 74.4dB SNR, 9mm × 9mm QFN Package 400mW, 74.3dB SNR, 9mm × 9mm QFN Package www.linear.com ● 2290fa RD/LT 0106 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2004 ...

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