MAX19707ETM+ Maxim Integrated Products, MAX19707ETM+ Datasheet

IC ANLG FRONT END 45MSPS 48-TQFN

MAX19707ETM+

Manufacturer Part Number
MAX19707ETM+
Description
IC ANLG FRONT END 45MSPS 48-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX19707ETM+

Number Of Bits
10
Number Of Channels
4
Power (watts)
84.6mW
Voltage - Supply, Analog
3V
Voltage - Supply, Digital
3V
Package / Case
48-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX19707 is an ultra-low-power, mixed-signal ana-
log front-end (AFE) designed for power-sensitive com-
munication equipment. Optimized for high dynamic
performance at ultra-low power, the device integrates a
dual, 10-bit, 45Msps receive (Rx) ADC; dual, 10-bit,
45Msps transmit (Tx) DAC; three fast-settling 12-bit
aux-DAC channels for ancillary RF front-end control;
and a 10-bit, 333ksps housekeeping aux-ADC. The typ-
ical operating power in Tx-Rx FAST mode is 84.6mW at
a 45MHz clock frequency.
The Rx ADCs feature 54.2dB SNR and 71.2dBc SFDR
at f
input amplifiers are fully differential and accept
1.024V
ing is ±0.03° phase and ±0.01dB gain.
The Tx DACs feature 73.2dBc SFDR at f
and f
age is ±400mV differential. The Tx DAC common-mode
DC level is programmable from 0.71V to 1.05V. The I/Q
channel offset is programmable to optimize radio lineup
sideband/carrier suppresion. The typical I/Q channel
matching is ±0.01dB gain and ±0.07° phase.
The Rx ADC and Tx DAC share a single, 10-bit parallel,
high-speed digital bus allowing half-duplex operation
for time-division duplex (TDD) applications. A 3-wire
serial interface controls power-management modes, the
aux-DAC channels, and the aux-ADC channels.
The MAX19707 operates on a single 2.7V to 3.3V ana-
log supply and 1.8V to 3.3V digital I/O supply. The
MAX19707 is specified for the extended (-40°C to
+85°C) temperature range and is available in a 48-pin,
thin QFN package. The Selector Guide at the end of the
data sheet lists other pin-compatible versions in this
AFE family.
*All devices are specified over the -40°C to +85°C operating
range.
**EP = Exposed paddle.
+Denotes lead-free package.
19-3826; Rev 1; 6/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
WiMAX CPEs
802.11a/b/g WLAN
MAX19707ETM
MAX19707ETM+
IN
CLK
= 5.5MHz and f
P-P
PART*
= 45MHz. The analog I/Q full-scale output volt-
full-scale signals. Typical I/Q channel match-
________________________________________________________________ Maxim Integrated Products
48 Thin QFN-EP**
48 Thin QFN-EP**
Ordering Information
PIN-PACKAGE
CLK
General Description
= 45MHz. The analog I/Q
VoIP Terminals
Portable Communication
Equipment
Applications
10-Bit, 45Msps, Ultra-Low-Power
OUT
PKG CODE
T4877-4
T4877-4
= 2.2MHz
♦ Dual, 10-Bit, 45Msps Rx ADC and Dual, 10-Bit,
♦ Ultra-Low Power
♦ Programmable Tx DAC Common-Mode DC Level
♦ Excellent Dynamic Performance
♦ Three 12-Bit, 1µs Aux-DACs
♦ 10-Bit, 333ksps Aux-ADC with 4:1 Input Mux and
♦ Excellent Gain/Phase Match
♦ Multiplexed Parallel Digital I/O
♦ Serial-Interface Control
♦ Versatile Power-Control Circuits
♦ Miniature 48-Pin Thin QFN Package
Functional Diagram and Selector Guide appear at end of
data sheet.
45Msps Tx DAC
and I/Q Offset Trim
Data Averaging
(7mm x 7mm x 0.8mm)
TOP VIEW
REFIN
DAC2
DAC1
REFN
COM
84.6mW at f
77.1mW at f
Low-Current Standby and Shutdown Modes
SNR = 54.2dB at f
SFDR = 73.2dBc at f
±0.03° Phase, ±0.01dB Gain (Rx ADC) at
f
Shutdown, Standby, Idle, Tx/Rx Disable
GND
QDN
QDP
V
V
IDN
IN
IDP
DD
DD
= 5.5MHz
37
38
39
40
41
42
43
44
45
46
47
48
Analog Front-End
36 35 34 33 32 31 30 29 28 27 26 25
1
2
CLK
CLK
3
EXPOSED PADDLE (GND)
= 45MHz, Fast Mode
= 45MHz, Slow Mode
4
IN
THIN QFN
5
MAX19707
= 5.5MHz (Rx ADC)
OUT
6
Pin Configuration
7
= 2.2MHz (Tx DAC)
8
9 10
11 12
Features
24
23
22
21
20
19
18
17
16
15
14
13
D9
D8
D7
D6
OV
OGND
D5
D4
D3
D2
D1
D0
DD
1

Related parts for MAX19707ETM+

MAX19707ETM+ Summary of contents

Page 1

... Portable Communication Equipment Ordering Information PART* PIN-PACKAGE MAX19707ETM 48 Thin QFN-EP** MAX19707ETM+ 48 Thin QFN-EP** *All devices are specified over the -40°C to +85°C operating range. **EP = Exposed paddle. +Denotes lead-free package. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...

Page 2

Ultra-Low-Power Analog Front-End ABSOLUTE MAXIMUM RATINGS GND OGND ..............................-0.3V to +3.6V GND to OGND.......................................................-0.3V to +0.3V IAP, IAN, QAP, QAN, IDP, IDN, QDP, QDN, DAC1, DAC2, DAC3 to GND .....................-0. ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 3V 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µF, unless otherwise noted. C ...

Page 4

Ultra-Low-Power Analog Front-End ELECTRICAL CHARACTERISTICS (continued 3V 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output ...

Page 5

ELECTRICAL CHARACTERISTICS (continued 3V 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µF, unless otherwise noted. C ...

Page 6

Ultra-Low-Power Analog Front-End ELECTRICAL CHARACTERISTICS (continued 3V 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output ...

Page 7

ELECTRICAL CHARACTERISTICS (continued 3V 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µF, unless otherwise noted. C ...

Page 8

Ultra-Low-Power Analog Front-End ELECTRICAL CHARACTERISTICS (continued 3V 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output ...

Page 9

ELECTRICAL CHARACTERISTICS (continued 3V 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µF, unless otherwise noted. C ...

Page 10

Ultra-Low-Power Analog Front-End ( 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µ ...

Page 11

OV = 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µ +25°C, unless otherwise noted.) COM ...

Page 12

Ultra-Low-Power Analog Front-End ( 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µ ...

Page 13

OV = 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µ +25°C, unless otherwise noted.) COM ...

Page 14

Ultra-Low-Power Analog Front-End ( 1.8V, internal reference (1.024V amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output 0.33µ ...

Page 15

PIN NAME 10 QAP Channel-QA Positive Analog Input. For single-ended operation, connect signal source to QAP. Digital I/O. Outputs for receive ADC in Rx mode. Inputs for transmit DAC in Tx mode the most 13–18, 21–24 D0–D9 significant ...

Page 16

Ultra-Low-Power Analog Front-End Dual, 10-Bit Rx ADC The ADC uses a seven-stage, fully differential, pipelined architecture that allows for high-speed conversion while minimizing power consumption. Samples taken at the inputs move progressively through the pipeline stages every half ...

Page 17

Table 1. Rx ADC Output Codes vs. Input Voltage DIFFERENTIAL INPUT DIFFERENTIAL INPUT (LSB) VOLTAGE V x 512/512 511 (+Full Scale - 1 LSB) REF V x 511/512 510 (+Full Scale - 2 LSB) REF V x 1/512 REF V ...

Page 18

Ultra-Low-Power Analog Front-End CHI CHQ t CLK CLK t t DOQ DOI D0–D9 D0Q D1I D1Q Figure 3. Rx ADC System Timing Diagram Dual, 10-Bit Tx DAC The dual, 10-bit digital-to-analog converter (Tx DAC) ...

Page 19

The Tx DAC also features independent DC offset cor- rection of each I/Q channel. This feature is configured through the SPI interface. The DC offset correction is MAX19707 Tx DAC I-CH Tx DAC Q-CH FULL SCALE = 1.25V V = ...

Page 20

Ultra-Low-Power Analog Front-End Figure 5 shows the relationship between the clock, input data, and analog outputs. Data for the I channel (ID) is latched on the falling edge of the clock signal, and Q- channel (QD) data is ...

Page 21

Table 3. MAX19707 Mode Control D11 D10 REGISTER NAME (MSB) 15 E11 = 0 E10 = 0 ENABLE-16 Reserved Reserved Aux-DAC1 1D11 1D10 Aux-DAC2 2D11 2D10 Aux-DAC3 3D11 3D10 IOFFSET — — QOFFSET — — COMSEL — — AD11 = ...

Page 22

Ultra-Low-Power Analog Front-End Table 5. External Tx-Rx Control Using ADDRESS DATA BITS 0011 0100 0000 (16-Bit Mode) or 1000 (8-Bit Mode) 0101 0110 22 ______________________________________________________________________________________ T/R Pin (T ...

Page 23

Table 6. Tx-Rx Control Using SPI Commands ADDRESS DATA BITS 1011 1100 0000 (16-Bit Mode) or 1000 (8-Bit Mode) 1101 1110 X = Don’t care. In ENABLE-16 mode, the aux-DACs have independent ...

Page 24

Ultra-Low-Power Analog Front-End Table 9. Offset Control Bits for I and Q Channels (IOFFSET or QOFFSET Mode) BITS IO5–IO0 WHEN IN IOFFSET MODE, BITS QO5–QO0 WHEN IN QOFFSET MODE IO5/QO5 IO4/QO4 • ...

Page 25

However, power consumption is higher in this mode because both the Tx and Rx cores are always on. To prevent bus contention in these states, the Rx ADC out- put buffers are tri-stated during Tx and the Tx DAC input ...

Page 26

Ultra-Low-Power Analog Front-End Mode-Recovery Timing Figure 7 shows the mode-recovery timing diagram the wakeup time when exiting shutdown, idle, WAKE or standby mode and entering mode the recovery time when switching ...

Page 27

Auxiliary Control DACs The MAX19707 includes three 12-bit aux-DACs (DAC1, DAC2, DAC3) with 1µs settling time for controlling VGA, AGC, and AFC functions. The aux-DAC output range is 0.1V to 2.56V. During power-up, the VGA and AGC out- puts ...

Page 28

Ultra-Low-Power Analog Front-End The conversion requires 12 clock edges (1 for input sampling, 1 for each of the 10 bits, and 1 at the end for loading into the serial output register) to complete one conversion cycle (when ...

Page 29

Table 17. Reference Modes V REFIN Internal Reference Mode. V > 0. with a 0.33µF capacitor. Buffered External Reference Mode. An external 1.024V ±10% reference voltage is applied to REFIN. V 1.024V ±10% internally generated to be ...

Page 30

Ultra-Low-Power Analog Front-End IDP MAX19707 IDN QDP QDN Figure 9. Balun Transformer-Coupled Differential-to-Single- Ended Output Drive for Tx DAC REFP 1kΩ ISO IN 0.1μF 50Ω 22pF 100Ω 1kΩ REFN 0.1μF R ISO 50Ω 100Ω ...

Page 31

R1 600Ω R2 600Ω R3 600Ω Figure 11. Rx ADC DC-Coupled Differential Drive 802.11X ZIF TRANSCEIVER AGC TCXO BATTERY VOLTAGE MONITOR TEMPERATURE MEASURE Figure 12. Typical Application Circuit for 802.11 Radio ______________________________________________________________________________________ 10-Bit, 45Msps, Ultra-Low-Power R4 R5 600Ω 600Ω R ...

Page 32

Ultra-Low-Power Analog Front-End Grounding, Bypassing, and Board Layout The MAX19707 requires high-speed board layout design techniques. Refer to the MAX19707 EV kit data sheet for a board layout reference. Place all bypass capacitors as close to the device ...

Page 33

Ideally, the ADC full-scale transition occurs at 1.5 LSB below full scale. The gain error is the amount of devia- tion between the measured transition point and the ideal transition point with the offset error removed. ADC Dynamic Parameter Definitions ...

Page 34

Ultra-Low-Power Analog Front-End Power-Supply Rejection Power-supply rejection is defined as the shift in offset and gain error when the power supply is changed ±5%. Small-Signal Bandwidth A small -20dBFS analog input signal is applied to an ADC in ...

Page 35

Ultra-Low-Power V = 2.7V TO 3.3V DD IAP 10-BIT IAN QAP 10-BIT ADC QAN IDP 10-BIT DAC IDN QDP 10-BIT DAC QDN PROGRAMMABLE OFFSET/CM 12-BIT DAC1 12-BIT DAC2 12-BIT DAC3 ADC1 ADC2 4:1 MUX ...

Page 36

Ultra-Low-Power Analog Front-End (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) E E/2 D ______________________________________________________________________________________ DETAIL A e (ND- ...

Page 37

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 37 © 2007 Maxim Integrated Products ...

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