Document
FEATURES
■ Sample Rate: 105Msps/80Msps ■ 78.2dBFS Noise Floor ■ 100dB SFDR ■ SFDR >82dB at 250MHz (1.5VP-P Input Range) ■ PGA Front End (2.25VP-P or 1.5VP-P Input Range) ■ 700MHz Full Power Bandwidth S/H ■ Optional Internal Dither ■ Optional Data Output Randomizer ■ Single 3.3V Supply ■ Power Dissipation: 900mW/725mW ■ Optional Clock Duty Cycle Stabilizer ■ Out-of-Range Indicator ■ Pin-Compatible Family
105Msps: LTC2207 (16-Bit), LTC2207-14 (14-Bit) 80Msps: LTC2206 (16-Bit), LTC2206-14 (14-Bit) 65Msps: LTC2205 (16-Bit), LTC2205-14 (14-Bit) 40Msps: LTC2204 (16-Bit) 25Msps: LTC2203 (16-Bit) Single-Ended Clock 10Msps: LTC2202 (16-Bit) Single-Ended Clock ■ 48-Pin 7mm × 7mm QFN Package
APPLICATIONS
■ Telecommunications ■ Receivers ■ Cellular Base Stations ■ Spectrum Analysis ■ Imaging Systems ■ ATE
LTC2207/LTC2206
16-Bit, 105Msps/80Msps ADCs
DESCRIPTION
The LTC®2207/LTC2206 are 105Msps/80Msps, sampling 16-bit A/D converters designed for digitizing high frequency, wide dynamic range signals up to input frequencies of 700MHz. The input range of the ADC can be optimized with the PGA front end.
The LTC2207/LTC2206 are perfect for demanding communications applications, with AC performance that includes 78.2dB Noise Floor and 100dB spurious free dynamic range (SFDR). Ultralow jitter of 80fsRMS allows undersampling of high input frequencies with excellent noise performance. Maximum DC specs include ±4LSB INL, ±1LSB DNL (no missing codes) over temperature.
A separate output power supply allows the CMOS output swing to range from 0.5V to 3.6V.
The ENC+ and ENC– inputs may be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed with a wide range of clock duty cycles.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
3.3V SENSE
VCM 2.2μF
1.25V COMMON MODE BIAS VOLTAGE
INTERNAL ADC REFERENCE GENERATOR
OVDD
AIN+
ANALOG INPUT AIN–
+
S/H AMP
–
CLOCK/DUTY CYCLE
CONTROL
ENC+ ENC–
16-BIT PIPELINED ADC CORE
CORRECTION LOGIC AND SHIFT REGISTER
OUTPUT DRIVERS
OGND VDD GND
PGA SHDN DITH MODE OE ADC CONTROL INPUTS
RAND
0.5V TO 3.6V
0.1μF
OF CLKOUT+ CLKOUT– D15
• • • D0
0.1μF
0.1μF
3.3V 0.1μF
22076 TA01
AMPLITUDE (dBFS)
LTC2207: 64K Point FFT, fIN = 14.8MHz, –1dBFS,
PGA = 0, 105Msps
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130 0
10
20
30
40
50
FREQUENCY (MHz)
22076 G05
22076fc
1
LTC2207/LTC2206
ABSOLUTE MAXIMUM RATINGS
OVDD = VDD (Notes 1, 2)
Supply Voltage (VDD) ................................... –0.3V to 4V Digital Output Ground Voltage (OGND)........ –0.3V to 1V
Analog Input Voltage (Note 3).......–0.3V to (VDD + 0.3V) Digital Input Voltage......................–0.3V to (VDD + 0.3V) Digital Output Voltage ................ –0.3V to (OVDD + 0.3V) Power Dissipation .............................................2000mW
Operating Temperature Range
LTC2207C/LTC2206C ............................... 0°C to 70°C
LTC2207I/LTC2206I.............................. –40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
Digital Output Supply Voltage (OVDD) .......... –0.3V to 4V
PIN CONFIGURATION
TOP VIEW
SENSE 1
VCM 2
VDD 3
VDD 4
GND 5
AIN+ 6 AIN– 7
49
GND 8 ENC+ 9 ENC– 10
GND 11
VDD 12
48 GND 47 PGA 46 RAND 45 MODE 44 OE 43 OF 42 D15 41 D14 40 D13 39 D12 38 OGND 37 OVDD
36 OVDD 35 D11 34 D10 33 D9 32 D8 31 OGND 30 CLKOUT+ 29 CLKOUT– 28 D7 27 D6 26 D5 25 OVDD
VDD 13 VDD 14 GND 15 SHDN 16 DITH 17 D0 18
D1 19 D2 20 D3 21 D4 22 OGND 23 OVDD 24
UK PACKAGE 48-LEAD (7mm s 7mm) PLASTIC QFN
EXPOSED PAD IS GND (PIN 49) MUST BE SOLDERED TO PCB BOARD TJMAX = 150°C, θJA = 29°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2207CUK#PBF
LTC2207CUK#TRPBF LTC2207UK
48-Lead (7mm × 7mm) Plastic Plastic QFN 0°C to 70°C
LTC2206CUK#PBF
LTC2206CUK#TRPBF LTC2206UK
48-Lead (7mm × 7mm) Plastic Plastic QFN 0°C to 70°C
LTC2207IUK#PBF
LTC2207IUK#TRPBF LTC2207UK
48-Lead (7mm × 7mm) Plastic Plastic QFN –40°C to 85°C
LTC2206IUK#PBF
LTC2206IUK#TRPBF LTC2206UK
48-Lead (7mm × 7mm) Plastic Plastic QFN –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts.
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/
CONVERTER CHARACTERISTICS The ● denotes the specifications which apply over the full.